Method and device for estimating operation safety level of tower crane
1. A method for estimating an operational security level of a tower crane, the method comprising:
respectively acquiring a displacement value and a distance value of at least one parameter to be measured associated with the operation of the tower crane;
determining an effective operating travel rate according to the displacement value and the travel value;
and determining the operation safety level of the tower crane according to the operation travel effective rate.
2. The method of claim 1, wherein the parameter under test comprises at least one of:
lifting parameters, rotation parameters, amplitude variation parameters and jacking parameters.
3. The method of claim 1, wherein obtaining displacement values for at least one parameter under test associated with tower crane operation comprises:
acquiring a signal value of a sensor corresponding to the parameter to be measured and carrying out filtering processing;
respectively recording data values of the parameter to be measured at the initial position and the termination position;
and determining the displacement value of the parameter to be measured according to the data value.
4. The method of claim 1, wherein obtaining a trip value for at least one parameter under test associated with tower crane operation comprises:
acquiring the current operating gear of the tower crane;
and determining the distance value of the parameter to be measured according to the speed corresponding to the operating gear and the movement time of the parameter to be measured.
5. The method of claim 1, wherein determining an operational trip efficiency rate based on the displacement value and the trip value comprises:
and determining the effective operating stroke rate according to the percentage of the displacement value and the distance value.
6. The method according to claim 1, wherein the number of the parameters to be measured is plural, each parameter to be measured corresponds to a weight value, and the determining the effective operating stroke rate according to the displacement value and the path value comprises:
respectively obtaining the effective rates of operation strokes corresponding to a plurality of parameters to be measured;
and determining the effective rate of the operation route according to the effective rate of the operation route of each parameter to be measured and the corresponding weight value.
7. The method according to claim 5 or 6, wherein the determining an operational safety level of the tower crane according to the operational trip efficiency rate comprises:
judging whether the effective rate of the operation stroke is smaller than a first threshold value;
determining that the operation safety level of the tower crane is a lower level under the condition that the operation travel effective rate is smaller than the first threshold value;
under the condition that the operation stroke effective rate is greater than or equal to the first threshold, judging whether the operation stroke effective rate is smaller than a second threshold;
determining that the operation safety level of the tower crane is a medium level under the condition that the operation travel effective rate is smaller than a second threshold;
and determining the operation safety level of the tower crane to be a higher level under the condition that the operation travel effective rate is greater than or equal to a second threshold value.
8. A controller configured to perform a method for estimating an operational safety level of a tower crane according to any one of claims 1 to 7.
9. An apparatus for estimating an operational safety level of a tower crane, comprising:
the sensor is used for acquiring a signal value of a parameter to be measured;
the controller of claim 8.
10. A tower crane, comprising an arrangement for estimating an operational safety level of a tower crane according to claim 9.
Background
In the hoisting construction process of the tower crane, the working efficiency and the operation safety are greatly different due to different operation levels of drivers. Meanwhile, with the popularization of the industrial safety monitoring system, the working condition data of the tower crane can be more conveniently acquired, and the data mining and application become the innovative basis of current designers. In the prior art, the operating level and the operating safety of a driver can not be directly judged from tower crane working condition data acquired by a safety monitoring system, and the operating safety of a tower crane can not be evaluated.
Disclosure of Invention
The invention aims to provide a method and a device for estimating the operation safety level of a tower crane, which are used for solving the problem that the operation safety of the tower crane cannot be estimated in the prior art.
To achieve the above object, a first aspect of the present invention provides a method for estimating an operational safety level of a tower crane, the method comprising:
respectively acquiring a displacement value and a distance value of at least one parameter to be measured associated with the operation of the tower crane;
determining an effective operating stroke rate according to the displacement value and the distance value;
and determining the operation safety level of the tower crane according to the operation travel effective rate.
In an embodiment of the present invention, the parameter to be measured includes at least one of:
lifting parameters, rotation parameters, amplitude variation parameters and jacking parameters.
In an embodiment of the invention, obtaining a displacement value of at least one parameter to be measured associated with tower crane operation comprises:
acquiring a signal value of a sensor corresponding to a parameter to be measured and carrying out filtering processing;
respectively recording data values of the parameter to be measured at the initial position and the termination position;
and determining the displacement value of the parameter to be measured according to the data value.
In an embodiment of the invention, obtaining the range value of the at least one parameter to be measured associated with tower crane operation comprises:
acquiring the current operating gear of the tower crane;
and determining the distance value of the parameter to be measured according to the speed corresponding to the operating gear and the movement time of the parameter to be measured.
In an embodiment of the present invention, determining the operational trip effectiveness rate based on the displacement value and the trip value comprises:
the operating trip effectiveness is determined based on the percentage of the displacement value to the trip value.
In an embodiment of the present invention, the number of the parameters to be measured is multiple, each parameter to be measured corresponds to a weight value, and determining the effective rate of the operation route according to the displacement value and the route value includes:
respectively obtaining the effective rates of operation strokes corresponding to a plurality of parameters to be measured;
and determining the effective rate of the operation route according to the effective rate of the operation route of each parameter to be measured and the corresponding weight value.
In an embodiment of the present invention, determining the operation safety level of the tower crane according to the operation stroke efficiency rate includes:
judging whether the effective rate of the operation stroke is smaller than a first threshold value;
determining the operation safety level of the tower crane to be a lower level under the condition that the operation travel effective rate is smaller than a first threshold value;
under the condition that the effective rate of the operation stroke is greater than or equal to the first threshold, judging whether the effective rate of the operation stroke is smaller than a second threshold;
determining that the operation safety level of the tower crane is a medium level under the condition that the operation travel effective rate is smaller than a second threshold;
and determining the operation safety level of the tower crane to be a higher level under the condition that the operation travel effective rate is greater than or equal to a second threshold value.
A second aspect of the invention provides a controller configured to perform the above-described method for estimating an operational safety level of a tower crane.
A third aspect of the present invention provides an apparatus for estimating an operational safety level of a tower crane, comprising:
the sensor is used for acquiring a signal value of a parameter to be measured;
according to the controller described above.
A fourth aspect of the invention provides a tower crane comprising an arrangement for estimating an operational safety level of the tower crane according to the above.
According to the technical scheme, the displacement value and the distance value of at least one parameter to be measured related to the operation of the tower crane are respectively obtained, the effective rate of the operation stroke is determined according to the displacement value and the distance value, the operation safety level of the tower crane is determined according to the effective rate of the operation stroke, the operation level and the operation safety of a driver can be directly judged according to the working condition data of the tower crane obtained by the safety monitoring system, and the operation safety of the tower crane is improved.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic flow chart diagram of a method for estimating an operational safety level of a tower crane according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a method for estimating an operational safety level of a tower crane according to another embodiment of the present invention;
FIG. 3 is a schematic flow chart diagram of a method for estimating an operational safety level of a tower crane according to yet another embodiment of the present invention;
FIG. 4 is a schematic flow chart of a method for determining an operational safety level of a tower crane according to an embodiment of the present invention;
fig. 5 is a block diagram of a controller provided by an embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Fig. 1 is a schematic flow chart of a method for estimating an operational safety level of a tower crane according to an embodiment of the present invention. As shown in fig. 1, an embodiment of the present invention provides a method for estimating an operational safety level of a tower crane, which may include the steps of:
in step S11, a displacement value and a distance value of at least one parameter to be measured associated with tower crane operation are obtained, respectively. In the embodiment of the invention, the tower crane is called a tower crane for short, and is a rotary crane with a movable arm arranged at the upper part of a high tower body. The tower crane has large working space, is mainly used for vertical and horizontal conveying of materials and installation of building components in building construction, and consists of a metal structure, a working mechanism and an electrical system. The metal structure comprises a tower body, a movable arm and a base, and the working mechanism comprises lifting, amplitude changing, rotating, walking and other parts. The safety monitoring system of the tower crane consists of a tower crane black box, tower crane wireless transmission equipment and a system platform, wherein the tower crane black box is responsible for recording, controlling and providing real-time data, the tower crane wireless transmission equipment is responsible for transmitting the real-time data through a GPRS network, and the system platform receives the real-time data and then displays, stores and processes the real-time data in real time. The tower crane is monitored in real time, so that accidents can be avoided, various working states of the tower crane can be displayed more visually, and comprehensive safety information is provided for a driver of the tower crane. However, in actual operation, the operation level of a driver is different, the working efficiency and the operation safety are greatly different, and the operation safety of the tower crane cannot be evaluated. Therefore, the displacement value and the distance value of the parameter to be measured of the tower crane are collected in real time, so that the degree of the displacement value deviation of the relevant parameter in the operation process of a driver can be obtained, and the operation level of the driver can be evaluated.
In an embodiment of the present invention, the parameters to be measured associated with the operation of the tower crane may be one or more, and the parameters to be measured may include, but are not limited to, a hoisting parameter, a slewing parameter, a luffing parameter, a jacking parameter, and the like. The displacement value of the parameter to be measured refers to a displacement value from a start position to an end position. The distance value of the parameter to be measured refers to the actually acquired distance value. Before acquiring the displacement value and the distance value, the safety monitoring system firstly judges whether the communication with the vehicle-mounted controller and each sensor is normal, acquires the signal value of the parameter to be detected in real time under the condition that the communication is normal, carries out filtering processing, and further acquires the displacement value and the distance value. In one example, assuming that a driver operates the tower crane to perform a slewing motion within a period of time, a displacement value can be obtained according to the displacement of the hook from the starting position to the ending position, and the distance of the hook from the starting position to the ending position can be obtained according to the integral of the current gear speed in a time dimension, namely the distance value can be obtained.
In step S12, an operating stroke effective rate is determined based on the displacement value and the trip value. In the embodiment of the invention, in the moving process of the tower crane, the deviation with different degrees from the displacement value can occur due to different operation levels of a driver, so that the displacement value and the distance value of the parameter to be measured are different. Thus, the driver's operation level can be deduced from the degree of deviation of the displacement value and the course value. The operating stroke efficiency in the embodiment of the present invention refers to the degree of deviation of the displacement value and the travel value. Preferably, the operating stroke effectiveness may be expressed in terms of a percentage, for example, determined by a percentage of the displacement value and the travel value, as shown in the following equation:
the effective operating stroke rate is (displacement value/path value) × 100%.
In step S13, an operational safety level of the tower crane is determined according to the operational trip efficiency rate. In the embodiment of the invention, the more effective the operating travel is, the better the operating level of the driver is, and the less effective the operating travel is, the worse the operating level of the driver is. Further, at least one threshold may be set to divide the operational security level. In one example, two thresholds may be set, and in the case where the operational trip efficiency rate is less than a first threshold, the operational safety level of the tower crane is determined to be a lower level, in the case where the operational trip efficiency rate is greater than or equal to the first threshold but less than a second threshold, the operational safety level of the tower crane is determined to be a medium level, and in the case where the operational trip efficiency rate is greater than or equal to the second threshold, the operational safety level of the tower crane is determined to be a higher level.
According to the technical scheme, the displacement value and the distance value of at least one parameter to be measured related to the operation of the tower crane are respectively obtained, the effective rate of the operation stroke is determined according to the displacement value and the distance value, the operation safety level of the tower crane is determined according to the effective rate of the operation stroke, the operation level and the operation safety of a driver can be directly judged according to the working condition data of the tower crane obtained by the safety monitoring system, and the operation safety of the tower crane is improved.
In an embodiment of the present invention, the parameter to be measured may include at least one of:
lifting parameters, rotation parameters, amplitude variation parameters and jacking parameters.
Specifically, the lifting mechanism is called as a lifting mechanism, is necessary for a tower crane, and is a basic structure for lifting and operating an article. The hoisting mechanism drives the winding drum to rotate through the coupling by the hoisting motor and the hollow shaft of the speed reducer, so that the steel wire rope or the cable wound on the winding drum drives the hook device to ascend or descend. The slewing mechanism is a mechanism which enables the slewing part of the tower crane or other machinery to rotate around the slewing center line of the slewing part, the power of the driving device is transmitted to a big gear ring fixed on the frame through an output pinion of the transmission device, and the slewing mechanism realizes that the slewing table rotates around the slewing center line of the slewing mechanism. The luffing mechanism is a main working mechanism of the tower crane and is used for changing the amplitude of the tower crane, namely changing the horizontal distance from the center of the lifting hook to the central axis of rotation so as to adapt to loading and unloading of articles by the tower crane under different conditions. The movements of the hoisting mechanism, the slewing mechanism and the luffing mechanism are all related to the movement of the lifting hook, so that the hoisting parameters, the slewing parameters and the luffing parameters can be obtained through the movement of the lifting hook. And obtaining a displacement value and a path value according to the displacement change and the path change of the lifting hook from the starting position to the ending position. Jacking refers to a construction method for jacking a roof structure assembled or poured and formed on the ground on site to a designed elevation step by utilizing a jack and alternately-filled column blocks, and in a tower crane, jacking refers to lifting a tower body. A displacement sensor is arranged in a jacking oil cylinder of the tower crane, and the expansion amount, namely the displacement value, of the jacking oil cylinder can be obtained; and the jacking distance measuring device also comprises a sensor capable of recording the number of the movement pulses, and the jacking distance value, namely the distance value, can be obtained by multiplying the number of the movement pulses by the precision. In the embodiment of the invention, the parameter to be measured can be one or more. And under the condition that the parameter to be measured is one, the effective rate of the operation stroke can be calculated only according to the displacement value and the distance value of the parameter to be measured. When there are a plurality of parameters to be measured, the total operation trip efficiency rate needs to be calculated according to the operation trip efficiency rate of each parameter to be measured and the corresponding weight.
In an embodiment of the present invention, obtaining a displacement value of at least one parameter under test associated with tower crane operation may comprise:
acquiring a signal value of a sensor corresponding to a parameter to be measured and carrying out filtering processing;
respectively recording data values of the parameter to be measured at the initial position and the termination position;
and determining the displacement value of the parameter to be measured according to the data value.
Specifically, the displacement value of the parameter to be measured refers to a displacement value from a start position to an end position. Before the displacement value is obtained, the safety monitoring system firstly judges whether the communication with the vehicle-mounted controller and each sensor is normal, and under the condition that the communication is normal, the signal value of the parameter to be measured is collected in real time, filtering processing is carried out, and then the displacement value is further collected. And respectively recording data values of the parameter to be measured at the initial position and the end position, and obtaining a displacement value of the parameter to be measured, namely the displacement value according to the difference value of the end position and the initial position. In one example, the motion of the hoist, swing mechanism and luffing mechanism is related to the motion of the hook, and thus, the hoist parameters, swing parameters and luffing parameters may be derived from the motion of the hook. The displacement value may be derived from the change in displacement of the hook from the starting position to the end position. In another example, the jacking refers to lifting the tower body, and a displacement sensor is arranged in a jacking oil cylinder of the tower crane, so that the expansion and contraction quantity, namely a displacement value, of the jacking oil cylinder can be obtained. In the embodiment of the present invention, a two-point calibration method may be adopted for the device for acquiring the displacement value of the parameter to be measured, two data points of known AD (Analog-to-Digital) values are respectively measured, and then the displacement value detection device is calibrated according to the measured values of the two points. In the embodiment of the invention, two different AD values and corresponding actual parameter values acquired by the tower crane can be respectively taken. And under the condition that the tower crane is at the first AD value and is not calibrated, calibrating the first point of the displacement value detection device, and under the condition that the tower crane is at the second AD value, calibrating the second point of the displacement value detection device. From this, a functional relationship of displacement values to AD values can be derived. In one example, the calibration coefficients k and b of the displacement detection device are determined by twice acquiring the AD values of the sensor and the displacement values of the corresponding actual parameters, and the displacement value of the actual parameter corresponding to each AD value is calculated by using the formula y-kx + b.
In an embodiment of the present invention, obtaining a range value for at least one parameter under test associated with tower crane operation may comprise:
acquiring the current operating gear of the tower crane;
and determining the distance value of the parameter to be measured according to the speed corresponding to the operating gear and the movement time of the parameter to be measured.
Specifically, the distance value of the parameter to be measured refers to an actually acquired distance value. The safety monitoring system can acquire the current operating gear of the crane, and calculate the distance value of the parameter to be measured, namely the distance value, according to the integral of the speed corresponding to the operating gear in the time dimension. In one example, the hoisting parameter, the slewing parameter and the luffing parameter may be derived from the movement of the hook. And obtaining a distance value according to the distance change of the lifting hook from the starting position to the ending position. In another example, the jacking refers to lifting the tower body, a sensor capable of recording the number of movement pulses is further included in a jacking oil cylinder of the tower crane, and the number of movement pulses is multiplied by the precision to obtain a jacking distance value, namely a distance value.
Fig. 2 is a flow chart illustrating a method for estimating an operational safety level of a tower crane according to another embodiment of the present invention. As shown in fig. 2, in an embodiment of the present invention, determining the operational trip effectiveness rate based on the displacement value and the trip value may include:
and step S21, determining the effective operating stroke rate according to the percentage of the displacement value and the journey value.
In an embodiment of the present invention, the operational stroke efficiency refers to a degree of deviation of the displacement value and the travel value. The operating trip effectiveness rate may be expressed in terms of a percentage, for example, determined by a percentage of the displacement value and the trip value. And under the condition that only one parameter to be measured exists, the effective rate of the operation stroke can be calculated only according to the displacement value and the distance value of the parameter to be measured. For example, the parameter to be measured is a lifting parameter, a rotation parameter or a variable amplitude parameter, and the following formula can be obtained:
the effective rate of lifting operation stroke is H% (lifting displacement value/lifting path value) × 100%; or
The slewing operation stroke effective rate S% (slewing angle displacement value/slewing angle path value) × 100%; or
The effective rate T% of the amplitude variation operation stroke is (amplitude variation displacement value/amplitude variation path value) × 100%.
Fig. 3 is a flowchart illustrating a method for estimating an operational safety level of a tower crane according to another embodiment of the present invention. As shown in fig. 3, in the embodiment of the present invention, the number of the parameters to be measured is multiple, each parameter to be measured corresponds to a weight value, and determining the effective rate of the operation trip according to the displacement value and the trip value may include:
step S31, respectively obtaining the effective rates of the operation strokes corresponding to a plurality of parameters to be measured;
step S32, determining the effective rate of the operation route according to the effective rate of the operation route of each parameter to be measured and the corresponding weight value.
In the embodiment of the invention, the number of the parameters to be detected is multiple, and each parameter to be detected corresponds to a weight value. Therefore, in the case that there are a plurality of parameters to be measured, the total operation schedule effective rate needs to be calculated according to the operation schedule effective rate of each parameter to be measured and the corresponding weight. For example, if the parameters to be measured are a lifting parameter, a rotation parameter and a luffing parameter, the weight corresponding to the lifting parameter is a weight H, the weight corresponding to the rotation parameter is a weight S, and the weight corresponding to the luffing parameter is a weight T, the following formula can be obtained:
the effective rate of lifting operation stroke is H% (lifting displacement value/lifting path value) × 100%;
the slewing operation stroke effective rate S% (slewing angle displacement value/slewing angle path value) × 100%;
the effective rate T% of the variable amplitude operation stroke is (variable amplitude displacement value/variable amplitude path value) × 100%;
the total operating pass efficiency is H% + S% + T% weight T.
Fig. 4 is a schematic flow chart of a method for determining an operation safety level of a tower crane according to an embodiment of the present invention. As shown in fig. 4, in an embodiment of the present invention, determining the operation safety level of the tower crane according to the operation trip efficiency rate may include:
step S41, judging whether the effective rate of the operation stroke is less than a first threshold value;
step S42, determining the operation safety level of the tower crane to be a lower level under the condition that the operation travel effective rate is less than a first threshold value;
step S43, under the condition that the effective rate of the operation stroke is greater than or equal to the first threshold, judging whether the effective rate of the operation stroke is less than a second threshold;
step S44, determining the operation safety level of the tower crane to be a medium level under the condition that the operation travel effective rate is smaller than a second threshold;
and step S45, determining the operation safety level of the tower crane to be a higher level when the operation travel effective rate is greater than or equal to a second threshold value.
In the embodiment of the invention, the more effective the operating travel is, the better the operating level of the driver is, and the less effective the operating travel is, the worse the operating level of the driver is. The embodiment of the invention sets two thresholds, and divides the operation safety level into three levels, namely a higher level, a lower level and a middle level. The method comprises the steps of determining that the operation safety level of a tower crane is a low level when an operation travel effective rate is smaller than a first threshold value, indicating that the operation level of a driver is poor and the potential safety hazard is large, determining that the operation safety level of the tower crane is a low level when the operation travel effective rate is larger than or equal to the first threshold value but smaller than a second threshold value, indicating that the operation level of the driver is general and the potential safety hazard is medium, determining that the operation safety level of the tower crane is a medium level, indicating that the operation level of the driver is good and the potential safety hazard is small when the operation travel effective rate is larger than or equal to the second threshold value, and determining that the operation safety level of the tower crane is a medium levelRespectively, a higher level. Assume that the first threshold is a1The second threshold is a2Taking a plurality of parameters to be measured as an example, assuming that the parameters to be measured are a lifting parameter, a rotation parameter and a variable amplitude parameter, the effective rate of the lifting operation stroke is H%, the effective rate of the rotation operation stroke is S%, the effective rate of the variable amplitude operation stroke is T%, and the effective rate of the total operation stroke is H% + S% + T weight T. Efficiency in total operation stroke<a1Under the condition of (2), the operation level of a driver is poor, and the potential safety hazard is large. At a1<Total operating stroke efficiency<a2Under the condition of (2), the operation level of a driver is general, and the potential safety hazard is moderate. Efficiency in total operation stroke>a2Under the condition of (2), the operation level of a driver is better, and the potential safety hazard is smaller. Therefore, the operating level and the operating safety of a driver can be directly judged from the working condition data of the tower crane acquired by the safety monitoring system, and the operating safety of the tower crane is improved.
Fig. 5 is a block diagram of a controller provided by an embodiment of the present invention. As shown in fig. 5, an embodiment of the present invention further provides a controller configured to execute the above-mentioned method for estimating the operation safety level of the tower crane. The controller may include a processor 510 and a memory 520. The memory 520 may store instructions that, when executed by the processor 510, may cause the processor 510 to perform the method for estimating an operational safety level of a tower crane described in the previous embodiments.
Specifically, in an embodiment of the present invention, processor 510 is configured to:
respectively acquiring a displacement value and a distance value of at least one parameter to be measured associated with the operation of the tower crane;
determining an effective operating stroke rate according to the displacement value and the distance value;
and determining the operation safety level of the tower crane according to the operation travel effective rate.
In the embodiment of the invention, the tower crane is called a tower crane for short, and is a rotary crane with a movable arm arranged at the upper part of a high tower body. The tower crane has large working space, is mainly used for vertical and horizontal conveying of materials and installation of building components in building construction, and consists of a metal structure, a working mechanism and an electrical system. The metal structure comprises a tower body, a movable arm and a base, and the working mechanism comprises lifting, amplitude changing, rotating, walking and other parts. The safety monitoring system of the tower crane consists of a tower crane black box, tower crane wireless transmission equipment and a system platform, wherein the tower crane black box is responsible for recording, controlling and providing real-time data, the tower crane wireless transmission equipment is responsible for transmitting the real-time data through a GPRS network, and the system platform receives the real-time data and then displays, stores and processes the real-time data in real time. The tower crane is monitored in real time, so that accidents can be avoided, various working states of the tower crane can be displayed more visually, and comprehensive safety information is provided for a driver of the tower crane. However, in actual operation, the operation level of a driver is different, the working efficiency and the operation safety are greatly different, and the operation safety of the tower crane cannot be evaluated. Therefore, the displacement value and the distance value of the parameter to be measured of the tower crane are collected in real time, so that the degree of the displacement value deviation of the relevant parameter in the operation process of a driver can be obtained, and the operation level of the driver can be evaluated.
In an embodiment of the present invention, the parameter to be measured associated with the operation of the tower crane may be one or more, and may include, but is not limited to, a hoisting parameter, a slewing parameter, a luffing parameter, a jacking parameter, and the like. The displacement value of the parameter to be measured refers to a displacement value from a start position to an end position. The distance value of the parameter to be measured refers to the actually acquired distance value. Before acquiring the displacement value and the distance value, the safety monitoring system firstly judges whether the communication with the vehicle-mounted controller and each sensor is normal, acquires the signal value of the parameter to be detected in real time under the condition that the communication is normal, carries out filtering processing, and further acquires the displacement value and the distance value. In one example, assuming that a driver operates the tower crane to perform a slewing motion within a period of time, a displacement value can be obtained according to the displacement of the hook from the starting position to the ending position, and the distance of the hook from the starting position to the ending position can be obtained according to the integral of the current gear speed in a time dimension, namely the distance value can be obtained.
In the embodiment of the invention, in the moving process of the tower crane, the deviation with different degrees from the displacement value can occur due to different operation levels of a driver, so that the displacement value and the distance value of the parameter to be measured are different. Thus, the driver's operation level can be deduced from the degree of deviation of the displacement value and the course value. The operating stroke efficiency in the embodiment of the present invention refers to the degree of deviation of the displacement value and the travel value. Preferably, the operating stroke effectiveness may be expressed in terms of a percentage, for example, determined by a percentage of the displacement value and the travel value, as shown in the following equation:
the effective operating stroke rate is (displacement value/path value) × 100%.
In the embodiment of the invention, the more effective the operating travel is, the better the operating level of the driver is, and the less effective the operating travel is, the worse the operating level of the driver is. Further, at least one threshold may be set to divide the operational security level. In one example, two thresholds may be set, and in the case where the operational trip efficiency rate is less than a first threshold, the operational safety level of the tower crane is determined to be a lower level, in the case where the operational trip efficiency rate is greater than or equal to the first threshold but less than a second threshold, the operational safety level of the tower crane is determined to be a medium level, and in the case where the operational trip efficiency rate is greater than or equal to the second threshold, the operational safety level of the tower crane is determined to be a higher level.
According to the technical scheme, the displacement value and the distance value of at least one parameter to be measured related to the operation of the tower crane are respectively obtained, the effective rate of the operation stroke is determined according to the displacement value and the distance value, the operation safety level of the tower crane is determined according to the effective rate of the operation stroke, the operation level and the operation safety of a driver can be directly judged according to the working condition data of the tower crane obtained by the safety monitoring system, and the operation safety of the tower crane is improved.
In an embodiment of the present invention, the parameter to be measured may include at least one of:
lifting parameters, rotation parameters, amplitude variation parameters and jacking parameters.
Specifically, the lifting mechanism is called as a lifting mechanism, is necessary for a tower crane, and is a basic structure for lifting and operating an article. The hoisting mechanism drives the winding drum to rotate through the coupling by the hoisting motor and the hollow shaft of the speed reducer, so that the steel wire rope or the cable wound on the winding drum drives the hook device to ascend or descend. The slewing mechanism is a mechanism which enables the slewing part of the tower crane or other machinery to rotate around the slewing center line of the slewing part, the power of the driving device is transmitted to a big gear ring fixed on the frame through an output pinion of the transmission device, and the slewing mechanism realizes that the slewing table rotates around the slewing center line of the slewing mechanism. The luffing mechanism is a main working mechanism of the tower crane and is used for changing the amplitude of the tower crane, namely changing the horizontal distance from the center of the lifting hook to the central axis of rotation so as to adapt to loading and unloading of articles by the tower crane under different conditions. The movements of the hoisting mechanism, the slewing mechanism and the luffing mechanism are all related to the movement of the lifting hook, so that the hoisting parameters, the slewing parameters and the luffing parameters can be obtained through the movement of the lifting hook. And obtaining a displacement value and a path value according to the displacement change and the path change of the lifting hook from the starting position to the ending position. Jacking refers to a construction method for jacking a roof structure assembled or poured and formed on the ground on site to a designed elevation step by utilizing a jack and alternately-filled column blocks, and in a tower crane, jacking refers to lifting a tower body. A displacement sensor is arranged in a jacking oil cylinder of the tower crane, and the expansion amount, namely the displacement value, of the jacking oil cylinder can be obtained; and the jacking distance measuring device also comprises a sensor capable of recording the number of the movement pulses, and the jacking distance value, namely the distance value, can be obtained by multiplying the number of the movement pulses by the precision. In the embodiment of the invention, the parameter to be measured can be one or more. And under the condition that the parameter to be measured is one, the effective rate of the operation stroke can be calculated only according to the displacement value and the distance value of the parameter to be measured. When there are a plurality of parameters to be measured, the total operation trip efficiency rate needs to be calculated according to the operation trip efficiency rate of each parameter to be measured and the corresponding weight.
Further, processor 510 is also configured to:
acquiring a displacement value of at least one parameter under test associated with tower crane operation comprises:
acquiring a signal value of a sensor corresponding to a parameter to be measured and carrying out filtering processing;
respectively recording data values of the parameter to be measured at the initial position and the termination position;
and determining the displacement value of the parameter to be measured according to the data value.
Specifically, the displacement value of the parameter to be measured refers to a displacement value from a start position to an end position. Before the displacement value is obtained, the safety monitoring system firstly judges whether the communication with the vehicle-mounted controller and each sensor is normal, and under the condition that the communication is normal, the signal value of the parameter to be measured is collected in real time, filtering processing is carried out, and then the displacement value is further collected. And respectively recording data values of the parameter to be measured at the initial position and the end position, and obtaining a displacement value of the parameter to be measured, namely the displacement value according to the difference value of the end position and the initial position. In one example, the motion of the hoist, swing mechanism and luffing mechanism is related to the motion of the hook, and thus, the hoist parameters, swing parameters and luffing parameters may be derived from the motion of the hook. The displacement value may be derived from the change in displacement of the hook from the starting position to the end position. In another example, the jacking refers to lifting the tower body, and a displacement sensor is arranged in a jacking oil cylinder of the tower crane, so that the expansion and contraction quantity, namely a displacement value, of the jacking oil cylinder can be obtained.
Further, processor 510 is also configured to:
acquiring a range value for at least one parameter under test associated with tower crane operation comprises:
acquiring the current operating gear of the tower crane;
and determining the distance value of the parameter to be measured according to the speed corresponding to the operating gear and the movement time of the parameter to be measured.
Specifically, the distance value of the parameter to be measured refers to an actually acquired distance value. The safety monitoring system can acquire the current operating gear of the crane, and calculate the distance value of the parameter to be measured, namely the distance value, according to the integral of the speed corresponding to the operating gear in the time dimension. In one example, the hoisting parameter, the slewing parameter and the luffing parameter may be derived from the movement of the hook. And obtaining a distance value according to the distance change of the lifting hook from the starting position to the ending position. In another example, the jacking refers to lifting the tower body, a sensor capable of recording the number of movement pulses is further included in a jacking oil cylinder of the tower crane, and the number of movement pulses is multiplied by the precision to obtain a jacking distance value, namely a distance value.
Further, processor 510 is also configured to:
determining the operational trip efficiency rate based on the displacement value and the trip value may include:
the operating trip effectiveness is determined based on the percentage of the displacement value to the trip value.
In an embodiment of the present invention, the operational stroke efficiency refers to a degree of deviation of the displacement value and the travel value. The operating trip effectiveness rate may be expressed in terms of a percentage, for example, determined by a percentage of the displacement value and the trip value. And under the condition that only one parameter to be measured exists, the effective rate of the operation stroke can be calculated only according to the displacement value and the distance value of the parameter to be measured. For example, the parameter to be measured is a lifting parameter, a rotation parameter or a variable amplitude parameter, and the following formula can be obtained:
the effective rate of lifting operation stroke is H% (lifting displacement value/lifting path value) × 100%; or
The slewing operation stroke effective rate S% (slewing angle displacement value/slewing angle path value) × 100%; or
The effective rate T% of the amplitude variation operation stroke is (amplitude variation displacement value/amplitude variation path value) × 100%.
Further, processor 510 is also configured to:
the method includes that a plurality of parameters to be measured are provided, each parameter to be measured corresponds to a weight value, and determining the effective rate of the operation travel according to the displacement value and the travel value may include:
respectively obtaining the effective rates of operation strokes corresponding to a plurality of parameters to be measured;
and determining the effective rate of the operation route according to the effective rate of the operation route of each parameter to be measured and the corresponding weight value.
In the embodiment of the invention, the number of the parameters to be detected is multiple, and each parameter to be detected corresponds to a weight value. Therefore, in the case that there are a plurality of parameters to be measured, the total operation schedule effective rate needs to be calculated according to the operation schedule effective rate of each parameter to be measured and the corresponding weight. For example, if the parameters to be measured are a lifting parameter, a rotation parameter and a luffing parameter, the weight corresponding to the lifting parameter is a weight H, the weight corresponding to the rotation parameter is a weight S, and the weight corresponding to the luffing parameter is a weight T, the following formula can be obtained:
the effective rate of lifting operation stroke is H% (lifting displacement value/lifting path value) × 100%;
the slewing operation stroke effective rate S% (slewing angle displacement value/slewing angle path value) × 100%;
the effective rate T% of the variable amplitude operation stroke is (variable amplitude displacement value/variable amplitude path value) × 100%;
the total operating pass efficiency is H% + S% + T% weight T.
Further, processor 510 is also configured to:
determining the operational safety level of the tower crane according to the operational trip efficiency rate may include:
judging whether the effective rate of the operation stroke is smaller than a first threshold value;
determining the operation safety level of the tower crane to be a lower level under the condition that the operation travel effective rate is smaller than a first threshold value;
under the condition that the effective rate of the operation stroke is greater than or equal to the first threshold, judging whether the effective rate of the operation stroke is smaller than a second threshold;
determining that the operation safety level of the tower crane is a medium level under the condition that the operation travel effective rate is smaller than a second threshold;
and determining the operation safety level of the tower crane to be a higher level under the condition that the operation travel effective rate is greater than or equal to a second threshold value.
In the embodiment of the invention, the more effective the operating travel is, the better the operating level of the driver is, and the less effective the operating travel is, the worse the operating level of the driver is. The embodiment of the invention sets two thresholds and divides the operation safety level into threeLevel, higher level, lower level, and medium level. The method comprises the steps of determining that the operation safety level of a tower crane is a low level when the operation travel effective rate is smaller than a first threshold value, indicating that the operation level of a driver is poor and the potential safety hazard is large, determining that the operation safety level of the tower crane is a low level when the operation travel effective rate is larger than or equal to the first threshold value but smaller than a second threshold value, indicating that the operation level of the driver is general and the potential safety hazard is medium, determining that the operation safety level of the tower crane is a medium level, and determining that the operation safety level of the tower crane is a high level when the operation travel effective rate is larger than or equal to the second threshold value, indicating that the operation level of the driver is good and the potential safety hazard is small. Assume that the first threshold is a1The second threshold is a2Taking a plurality of parameters to be measured as an example, assuming that the parameters to be measured are a lifting parameter, a rotation parameter and a variable amplitude parameter, the effective rate of the lifting operation stroke is H%, the effective rate of the rotation operation stroke is S%, the effective rate of the variable amplitude operation stroke is T%, and the effective rate of the total operation stroke is H% + S% + T weight T. Efficiency in total operation stroke<a1Under the condition of (2), the operation level of a driver is poor, and the potential safety hazard is large. At a1<Total operating stroke efficiency<a2Under the condition of (2), the operation level of a driver is general, and the potential safety hazard is moderate. Efficiency in total operation stroke>a2Under the condition of (2), the operation level of a driver is better, and the potential safety hazard is smaller. Therefore, the operating level and the operating safety of a driver can be directly judged from the working condition data of the tower crane acquired by the safety monitoring system, and the operating safety of the tower crane is improved.
Examples of processor 510 may include, but are not limited to, a general purpose processor, a special purpose processor, a conventional processor, a Digital Signal Processor (DSP), a plurality of microprocessors, one or more microprocessors in association with a DSP core, a controller, a microcontroller, Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) circuits, any other type of Integrated Circuit (IC), a state machine, and the like. The processor may perform signal encoding, data processing, power control, input/output processing.
Examples of memory 520 may include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that may be used to store information that may be accessed by a processor.
An embodiment of the present invention further provides a device for estimating an operation security level of a tower crane, including:
the sensor is used for acquiring a signal value of a parameter to be measured;
according to the controller described above.
In particular, the sensor may comprise at least one of: the lifting device comprises a height sensor for detecting lifting parameters, a rotation angle sensor for detecting rotation parameters, an amplitude sensor for detecting amplitude variation parameters and a jacking sensor for detecting jacking parameters. Before acquiring the displacement value and the distance value, the safety monitoring system firstly judges whether the communication with the vehicle-mounted controller and each sensor is normal, acquires the signal value of the parameter to be detected in real time under the condition that the communication is normal, carries out filtering processing, and further acquires the displacement value and the distance value. The movements of the hoisting mechanism, the slewing mechanism and the luffing mechanism are all related to the movement of the lifting hook, so that the hoisting parameters, the slewing parameters and the luffing parameters can be obtained through the movement of the lifting hook. And obtaining a displacement value and a path value according to the displacement change and the path change of the lifting hook from the starting position to the ending position. A displacement sensor is arranged in a jacking oil cylinder of the tower crane, and the expansion amount, namely the displacement value, of the jacking oil cylinder can be obtained; and the jacking distance measuring device also comprises a sensor capable of recording the number of the movement pulses, and the jacking distance value, namely the distance value, can be obtained by multiplying the number of the movement pulses by the precision. And under the condition that the parameter to be measured is one, the effective rate of the operation stroke can be calculated only according to the displacement value and the distance value of the parameter to be measured. When there are a plurality of parameters to be measured, the total operation trip efficiency rate needs to be calculated according to the operation trip efficiency rate of each parameter to be measured and the corresponding weight. The method comprises the steps of respectively obtaining a displacement value and a distance value of at least one parameter to be measured related to the operation of the tower crane, determining an operation travel effective rate according to the displacement value and the distance value, determining an operation safety level of the tower crane according to the operation travel effective rate, directly judging the operation level and the operation safety of a driver from tower crane working condition data obtained by a safety monitoring system, and improving the operation safety of the tower crane.
The embodiment of the invention also provides the tower crane, which comprises the device for estimating the operation safety level of the tower crane.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
