1. A hydraulic transmission system, comprising:

the pressure transmission assembly is provided with a pressure transmission channel;

the pressure sensor is arranged on the pressure transmission assembly and used for acquiring a first pressure value in the pressure transmission channel;

the controller is connected with the pressure sensor and used for determining a target compaction degree according to the first pressure value;

the wheel body is connected with the pressure transmission assembly, and the pressure transmission assembly is used for driving the wheel body to vibrate.

2. The hydraulic drive system of claim 1, wherein the pressure drive assembly comprises:

a circulation line;

the pump body is arranged on the circulating pipeline;

the vibration motor is arranged on the circulating pipeline, the wheel body is connected with the vibration motor, and the pressure sensor is arranged on at least one of the circulating pipeline, the pump body and the vibration motor.

3. The hydraulic transmission system of claim 2, wherein the pressure sensor comprises:

the first sub-sensor is arranged on the circulating pipeline, the first sub-sensor is positioned between the first port of the pump body and the first port of the vibration motor, and the first port of the pump body is communicated with the first port of the vibration motor through the circulating pipeline;

the second sub-sensor is arranged on the circulating pipeline, the second sub-sensor is positioned between the second port of the vibration motor and the second port of the pump body, and the second port of the vibration motor is communicated with the second port of the pump body through the circulating pipeline;

wherein the pressure value measured by the first sub-sensor is the first pressure value; or

The pressure value measured by the second sub-sensor is the first pressure value; or

And the difference value of the pressure values measured by the first sub-sensor and the second sub-sensor is the first pressure value.

4. A roller, comprising:

a vehicle body;

a hydraulic transmission system as claimed in any one of claims 1 to 3, provided in the vehicle body.

5. A method of controlling a roller according to claim 4, the method comprising:

acquiring a first pressure value measured by a pressure sensor in the road roller;

and determining the target compaction degree according to the first pressure value.

6. The method for controlling a road roller according to claim 5, wherein determining a target compaction degree according to the first pressure value comprises:

comparing the first pressure value with prestored data;

and determining the target compaction degree according to the comparison result of the first pressure value and the prestored data.

7. A method of controlling a roller according to claim 6, further comprising:

and determining the displacement of a pump body and/or a vibration motor in the road roller according to the first pressure value.

8. The method for controlling a soil compactor according to claim 7, wherein determining the displacement of the pump body and/or the vibration motor in the soil compactor according to the first pressure value comprises:

when the second pressure value is smaller than the first pressure value and smaller than the first set pressure value and smaller than the third pressure value, reducing the displacement of the pump body and/or increasing the displacement of the vibration motor;

when the second pressure value is smaller than the second set pressure value and smaller than the first pressure value and smaller than the third pressure value, the displacement of the pump body is increased and/or the displacement of the vibration motor is reduced;

when the first set pressure value is smaller than the first set pressure value and smaller than the second set pressure value, maintaining the displacement of the pump body and the displacement of the vibration motor;

the second pressure value is the minimum pressure value in the pre-stored data, the third pressure value is the maximum pressure value in the pre-stored data, and the first set pressure value is smaller than the second set pressure value.

9. A method of controlling a roller according to claim 8, further comprising:

when the first pressure value is smaller than the second pressure value or the first pressure value is larger than the third pressure value, outputting an alarm signal.

10. A control device for a road roller, comprising:

a memory, a processor, and a computer program stored on the memory and executable on the processor;

the computer program, when executed by the processor, implementing the steps of a method for controlling a roller according to any one of claims 5 to 9.

Background

At present, when the pavement compaction degree is detected, the acceleration signal of a steel wheel needs to be collected, and the compaction condition of the pavement is reflected through the acceleration signal.

Because the steel wheel needs and ground contact, acceleration sensor can't direct mount on the steel wheel, also can't direct acquisition steel wheel's acceleration signal, so install acceleration sensor to the structure of fixed steel wheel usually on, however, there is the deviation in the acceleration data of the structure of gathering and the acceleration data of steel wheel, is difficult to guarantee to detect the accuracy of road surface compactness.

Disclosure of Invention

The present invention is directed to solving or improving one of the technical problems of the prior art or the related art.

In view of the above, the present invention provides, in a first aspect, a hydraulic transmission system.

In a second aspect, the invention provides a road roller.

In a third aspect, the invention provides a method of controlling a road roller.

In a fourth aspect, the invention provides a control apparatus for a road roller.

The invention provides a road roller comprising: the pressure transmission assembly is provided with a pressure transmission channel; the pressure sensor is arranged on the pressure transmission assembly and used for acquiring a first pressure value in the pressure transmission channel; the controller is connected with the pressure sensor and used for determining the target compaction degree according to the first pressure value; the wheel body is connected with the pressure transmission assembly, and the pressure transmission assembly is used for driving the wheel body to vibrate.

In the invention, the pressure transmission assembly is connected with the wheel body, so that the pressure transmission assembly can drive the wheel body to move. Specifically, the road roller still includes the automobile body, and the wheel body rotates to be connected in the automobile body, and pressure transmission assembly can drive the wheel body vibration, and pressure transmission assembly sets up pressure transmission channel, and hydraulic medium, for example hydraulic oil, the pressure transmission assembly is used for driving the wheel body vibration in the pressure transmission channel circulation, and the wheel body is through vibrating and will the road bed compaction. The pressure sensor sets up at the pressure transmission subassembly, and pressure sensor can acquire the first pressure value in the pressure transmission passageway, and pressure sensor is used for acquireing the hydraulic pressure value in the pressure transmission passageway promptly. When pressure transmission assembly drive wheel body vibrates, if current road bed degree of compaction is less, the road bed is in the fluffy state of comparison promptly, and less hydraulic drive power just can drive the wheel body vibration this moment, if the degree of compaction of current road bed is great, the road bed is in the state of comparison tamping promptly, needs great hydraulic drive power just can drive the wheel body vibration this moment. Therefore, the degree of compaction of the roadbed can be represented by the hydraulic pressure value, the smaller the first pressure value acquired by the pressure sensor is, the smaller the degree of compaction of the roadbed is, and the larger the first pressure value acquired by the pressure sensor is, the larger the degree of compaction of the roadbed is. The compactness of current road bed can be confirmed to the first pressure value that acquires through pressure sensor, and moreover, the pressure transmission subassembly is the structure of direct drive wheel body vibration, so the effort of pressure transmission subassembly to the wheel body has directly reflected the effort of roadbed to the wheel body, and when pressure transmission subassembly drive wheel body vibrated, the wheel body did not basically have the loss to the reaction force of pressure transmission subassembly, so can accurately acquire the effort of roadbed to the wheel body.

It is worth noting that, compare in the correlation technique, what gather in this application is first pressure value rather than acceleration, receive the installation gap, cooperation stability's influence, the structure of installation wheel body and wheel body probably are not synchronous motion, so there is the deviation in the acceleration of wheel body and the acceleration of structure, and the wheel body receives behind the effort of road bed, this effort can direct action pressure drive assembly, according to the principle that effort and reaction force are equal, pressure drive assembly's first pressure value can accurate reaction road bed to the effort of wheel body to accuracy when improving the detection road bed compactness.

In addition, the pressure sensor is arranged in the pressure transmission assembly, and the pressure transmission assembly is usually arranged in the vehicle body, so that the pressure sensor is not easily exposed out of the vehicle body, the pressure sensor is not easily damaged, the influence of an external device is not easily caused, and the accuracy of the pressure sensor in acquiring numerical values is further improved. Moreover, the pressure sensor is positioned in the vehicle body, so that the appearance of the road roller is not easily affected, and the appearance neatness of the road roller is improved.

The pressure sensor directly collects the vibration pressure of the pressure transmission assembly, has directness, and is connected to the pressure measuring interface.

In one possible design, the pressure transmission assembly includes: a circulation line; the pump body is arranged on the circulating pipeline; the vibrating motor is arranged on the circulating pipeline, the wheel body is connected with the vibrating motor, and the pressure sensor is arranged on at least one of the circulating pipeline, the pump body and the vibrating motor.

In this design, the pump body and vibrating motor are connected through circulation pipeline, and fluid can circulate between the pump body, circulation pipeline and vibrating motor and flow, and the pump body is as the power supply, for the flow power that provides of fluid, when fluid flows through vibrating motor, and fluid can drive vibrating motor's output shaft and rotate to drive the wheel body vibration through vibrating motor. The pressure sensor can be installed on any one of the circulating pipeline, the pump body and the vibration motor, and the installation flexibility of the pressure sensor is improved. The pressure sensors may be one, two or more, and when the pressure sensor is one, the pressure sensor may be mounted to the circulation line, the pump body or the vibration motor, and when the pressure sensor is two, the two pressure sensors may be simultaneously mounted to one component or the two pressure sensors may be mounted to different components, and the pressure sensors may be simultaneously arranged.

The installation position of the pressure sensor is flexible, and the pressure sensor can be arranged at any suitable position of the pressure transmission assembly.

In one possible design, the pressure sensor includes: the first sub-sensor is arranged on the circulating pipeline, the first sub-sensor is positioned between the first port of the pump body and the first port of the vibration motor, and the first port of the pump body is communicated with the first port of the vibration motor through the circulating pipeline; the second sub-sensor is arranged between a second port of the vibration motor and a second port of the pump body, and the second port of the vibration motor is communicated with the second port of the pump body through the circulating pipeline; the pressure value measured by the first sub-sensor is a first pressure value; or the pressure value measured by the second sub-sensor is the first pressure value; or the difference value of the pressure values measured by the first sub-sensor and the second sub-sensor is the first pressure value.

In this design, the pump body has two ports, one of the two ports is an oil inlet, the other of the two ports is an oil outlet, the oil inlet and the oil outlet are not fixed, for example, the first port of the pump body can be used as the oil inlet, then the second port of the pump body is the oil outlet, and if the first port of the pump body is used as the oil outlet, then the second port of the pump body is the oil inlet. Likewise, the vibration motor also has two ports, and each port may be either an oil inlet or an oil outlet. In the design, the pressure sensor is limited to comprise a first sub-sensor and a second sub-sensor, the first sub-sensor is arranged between the first port of the pump body and the first port of the vibration motor, the second sub-sensor is arranged between the second port of the pump body and the second port of the vibration motor, if the first port of the pump body is an oil outlet at the moment, the first sub-sensor obtains oil inlet pressure, the second sub-sensor obtains oil return pressure, and if the second port of the pump body is an oil outlet, the first sub-sensor obtains oil return pressure, and the first sensor obtains oil outlet pressure.

The vibration motor is used for driving the wheel body to vibrate, the vibration motor is generally composed of two parts, namely a motor body and a cam component, the cam component drives the wheel body to vibrate, and when the vibration motor rotates forwards or backwards, the vibration amplitude of the vibration motor driving the wheel body is different, so that after the steering of the vibration motor is determined, which pressure sensor is used as an effective sensor is determined.

Exemplarily, can regard the pressure sensor who surveys oil feed pressure as effective sensor, so first sub sensor and second sub sensor are can effective sensor, also can two sub sensor all regard as effective sensor, will survey the pressure value of oil feed pressure and the pressure value of oil return pressure and ask for the difference in order to obtain effective pressure value. Set up pressure sensor on advancing oil pipe way and returning oil pipe way respectively, can improve the accuracy of obtaining the pressure value, and then can improve the accuracy when examining the road bed compactness.

The first pressure value may be obtained by one pressure sensor, or the pressure values obtained by two or more pressure sensors may be subjected to a difference calculation to obtain the first pressure value.

The invention provides a road roller comprising: a hydrostatic drive system as in any one of the first aspect, whereby the invention provides a roller having all the benefits of the hydrostatic drive system as provided in any one of the possible designs described above.

The road roller also comprises a vehicle body, and the hydraulic transmission system is arranged on the vehicle body.

The invention provides a method of controlling a roller for use with a roller as described in any one of the possible designs of the first aspect above, and therefore the invention provides a method of controlling a roller which has all the benefits of a roller as described in any one of the possible designs above.

The control method of the road roller comprises the following steps: acquiring a first pressure value measured by a pressure sensor in the road roller; and determining the target compaction degree according to the first pressure value.

The target compactness can be the compactness of the target roadbed, and when the compactness of the target roadbed is detected, a first pressure value in the pressure transmission channel is obtained through the pressure sensor. When pressure transmission assembly drive wheel body vibrates, if current road bed degree of compaction is less, the road bed is in the fluffy state of comparison promptly, and less hydraulic drive power just can drive the wheel body vibration this moment, if the degree of compaction of current road bed is great, the road bed is in the state of comparison tamping promptly, needs great hydraulic drive power just can drive the wheel body vibration this moment. Therefore, the degree of compaction of the roadbed can be represented by the first pressure value, the smaller the first pressure value acquired by the pressure sensor is, the smaller the degree of compaction of the roadbed is, and the larger the first pressure value acquired by the pressure sensor is, the larger the degree of compaction of the roadbed is. The compactness of current road bed can be confirmed to the first pressure value that acquires through pressure sensor, and moreover, the pressure transmission subassembly is the structure of direct drive wheel body vibration, so the effort of pressure transmission subassembly to the wheel body equals the effort of roadbed to the wheel body, and when the pressure transmission subassembly drove the wheel body vibration, the wheel body had not the loss to the reaction force of pressure transmission subassembly basically, so can accurately acquire the effort of roadbed to the wheel body. According to the principle that the acting force is equal to the reacting force, the first pressure value of the pressure transmission assembly can accurately reflect the acting force of the roadbed to the wheel body, and therefore the accuracy in the roadbed compactness detection is improved.

After the target compaction degree is obtained, the target compaction degree can be displayed, so that the working personnel can know the current compaction degree of the roadbed in time.

The first pressure value may be obtained by one pressure sensor, or the pressure values obtained by two or more pressure sensors may be subjected to a difference calculation to obtain the first pressure value, and the first pressure value in the present design may be an effective pressure value in the design of the first aspect.

In one possible design, determining the target degree of compaction according to the first pressure value specifically includes: comparing the first pressure value with prestored data; and determining the target compaction degree according to the comparison result of the first pressure value and the prestored data.

In the design, when the compaction degree of the target roadbed is detected, a first pressure value is obtained firstly, then the first pressure value is compared with prestored data, and according to the comparison result, the compaction degree of the current roadbed is determined, the prestored data are corresponding relations of different pressure values and corresponding compaction degrees, and the corresponding relation of the pressure values and the compaction degrees can be data accumulated by measuring on a test road surface for many times, and also can be data obtained by detecting after the compaction degree is detected every time and stored in a memory. When the first pressure value is obtained, the compaction degree corresponding to the current first pressure value can be known only by finding the pressure value equal to the current first pressure value in the pre-stored data, and the difficulty of detecting the target compaction degree can be reduced and the detection speed can be improved without complex algorithms, such as steps of frequency spectrum change, intelligent algorithms and the like.

It is worth noting that the target compactness is determined in a comparison mode in the design, and the calculation method is simple, so that the calculation process can be completed through a controller of the road roller, a controller for calculating the compactness is not required to be added on the road roller, the space in a driving cabin of the road roller is prevented from being occupied by too many controllers, and the cost for installing the controllers is saved. And the pre-stored data is historical data, the historical data has better referential performance, and compared with the compaction degree obtained by algorithm calculation, the target compaction degree obtained by referring to the historical data is more accurate.

In one possible design, the method for controlling a road roller further includes: and determining the displacement of the pump body and/or the vibration motor in the road roller according to the first pressure value.

In the design, after the first pressure value is acquired, the displacement of the pump body/or the motor can be determined according to the first pressure value, the displacement of the pump body and the displacement of the motor can determine the rotating speed of the motor, and the rotating speed of the motor can determine the amplitude and the vibration frequency of the wheel body. Through the discharge capacity that changes the pump body and the discharge capacity of motor, can effectively improve compaction efficiency.

In one possible design, determining the displacement of the pump body and/or the vibration motor in the road roller according to the first pressure value specifically comprises: when the second pressure value is smaller than the first pressure value and smaller than the first set pressure value and smaller than the third pressure value, reducing the displacement of the pump body and/or increasing the displacement of the vibration motor; when the second pressure value is smaller than the second set pressure value and smaller than the first pressure value and smaller than the third pressure value, the displacement of the pump body is increased and/or the displacement of the vibration motor is reduced; when the first set pressure value is smaller than the second set pressure value, maintaining the displacement of the pump body and the displacement of the vibration motor; the second pressure value is the minimum pressure value in the pre-stored data, the third pressure value is the maximum pressure value in the pre-stored data, and the first set pressure value is smaller than the second set pressure value.

In this design, when comparing first pressure value with the data of prestoring, acquire the maximum pressure value and the minimum pressure value in the data of prestoring earlier, confirm the pressure value scope through maximum pressure value and minimum pressure value, when the second pressure value is less than first set pressure value and is less than the third pressure value at first pressure value, it is less to explain this moment first pressure value, the discharge capacity that needs to reduce the pump body and/or increase vibrating motor, in order to reduce vibrating motor's rotational speed, thereby can improve the amplitude of wheel body, the amplitude of wheel body is big more, it is fast more to the tamping speed of target road bed.

When the second pressure value is less than the second set pressure value and is less than the first pressure value and is less than the third pressure value, it is great to explain first pressure value this moment, needs the discharge capacity of the increase pump body and/or reduces vibrating motor's discharge capacity to increase vibrating motor's rotational speed, thereby improve the vibration frequency of wheel body, the wheel body vibrates fast, thereby can carry out even compaction to the road bed in the certain limit, improves the compaction degree of consistency. Through the two modes, the compaction efficiency is improved.

If the first pressure value is between the first set pressure value and the second set pressure value, the first pressure value is in a pressure range meeting the set requirement at the moment, and the displacement of the pump body and the displacement of the vibration motor do not need to be changed at the moment.

The first set pressure value and the second set pressure value are set according to different compaction degree requirements.

In one possible design, the method of controlling the road roller further includes: and when the first pressure value is smaller than the second pressure value or the first pressure value is larger than the third pressure value, outputting an alarm signal.

In the design, when the first pressure value is smaller than the minimum pressure value in the pre-stored data or the first pressure value is larger than the maximum pressure value in the pre-stored data, the pressure abnormality in the pressure transmission assembly at the moment is explained, and an alarm signal is output to remind a worker to check and process in time. The pre-stored data has referential property, so that the acquired first pressure value is not in the pressure range of the pre-stored data, the machine is not in a stable working state, an alarm signal is output, the road roller can be prevented from being further damaged, and the road roller can be maintained by a worker in time conveniently.

The invention provides a control device for a road roller, comprising: a memory, a processor, and a computer program stored on the memory and executable on the processor; the computer program when executed by the processor implements the steps of a method of controlling a vehicle according to any one of the possible arrangements of the third aspect, and so the control apparatus for a vehicle according to the invention has all the benefits of a method of controlling a vehicle according to any one of the possible arrangements.

The invention provides a readable storage medium having stored thereon a control program for a compactor, the control program, when executed by a processor, implementing the steps of a method of controlling a compactor according to any one of the possible designs of the third aspect, whereby the readable storage medium has all the benefits of the method of controlling a compactor according to any one of the possible designs described above.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 shows a schematic representation of the construction of a roller according to an embodiment of the invention;

fig. 2 shows one of the flow charts of a method of controlling a roller according to an embodiment of the invention;

figure 3 shows a second flow chart of a method of controlling a vehicle according to an embodiment of the invention;

fig. 4 shows a third flow chart of a method of controlling a vehicle according to an embodiment of the invention;

fig. 5 shows a fourth flowchart of a method of controlling a vehicle according to an embodiment of the invention;

figure 6 shows a fifth flowchart of a method of controlling a roller according to an embodiment of the invention;

figure 7 shows a sixth flowchart of a method of controlling a road roller according to an embodiment of the invention;

fig. 8 shows a block diagram of a control device for a road roller according to an embodiment of the invention.

Wherein, the corresponding relation between the reference numbers and the part names in fig. 1 is:

100 pressure transmission assembly, 110 circulation line, 120 pump body, 130 vibration motor, 200 pressure sensor, 210 first sub-sensor, 220 second sub-sensor.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

A hydraulic drive system, a roller, a method of controlling a roller, a control apparatus for a roller and a readable storage medium provided in accordance with some embodiments of the invention will now be described with reference to figures 1 to 8.

In some embodiments of the present application, as shown in fig. 1, there is provided a roller comprising: the pressure transmission assembly 100 is provided with a pressure transmission channel; the pressure sensor 200 is arranged on the pressure transmission assembly 100, and the pressure sensor 200 is used for acquiring a first pressure value in the pressure transmission channel; the controller is connected with the pressure sensor 200 and is used for determining the target compaction degree according to the first pressure value; the wheel body is connected with a pressure transmission assembly 100, and the pressure transmission assembly 100 is used for driving the wheel body to vibrate.

The pressure transmission assembly 100 is connected with the wheel body, so that the pressure transmission assembly 100 can drive the wheel body to move. Specifically, the road roller further comprises a vehicle body, the wheel body is rotatably connected to the vehicle body, the pressure transmission assembly 100 can drive the wheel body to vibrate, the pressure transmission assembly 100 is provided with a pressure transmission channel, a hydraulic medium, such as hydraulic oil, circulates in the pressure transmission channel, the pressure transmission assembly 100 is used for driving the wheel body to vibrate, and the wheel body compacts the roadbed through vibration. A pressure sensor 200 is provided in the pressure transmission assembly 100, and the pressure sensor 200 can acquire a first pressure value in the pressure transmission channel, i.e. the pressure sensor 200 is used for acquiring a hydraulic pressure value in the pressure transmission channel. When pressure transmission assembly 100 drives the wheel body vibration, if present road bed degree of compaction is less, and the road bed is in the state of comparison fluffy promptly, less hydraulic drive power just can drive the wheel body vibration this moment, if present road bed degree of compaction is great, and the road bed is in the state of comparison tamping promptly, needs great hydraulic drive power just can drive the wheel body vibration this moment. Therefore, the degree of compaction of the roadbed can be represented by the hydraulic pressure value, the smaller the first pressure value acquired by the pressure sensor 200 is, the smaller the degree of compaction of the roadbed is, and the larger the first pressure value acquired by the pressure sensor 200 is, the larger the degree of compaction of the roadbed is. The first pressure value obtained by the pressure sensor 200 can determine the compaction degree of the current roadbed, and the pressure transmission assembly 100 is a structure that directly drives the wheel body to vibrate, so that the acting force of the pressure transmission assembly 100 on the wheel body is equal to the acting force of the roadbed on the wheel body, and when the pressure transmission assembly 100 drives the wheel body to vibrate, the reaction force of the wheel body on the pressure transmission assembly 100 is basically not lost, so that the acting force of the roadbed on the wheel body can be accurately obtained.

It should be noted that, compared with the related art, what collected in this application is a pressure value rather than an acceleration, receives the influence of installation gap, cooperation stability, and the structure of installation wheel body and wheel body may not be synchronous motion, so there is the deviation in the acceleration of wheel body and the acceleration of structure, and after the wheel body received the effort of road bed, this effort can direct action on pressure transmission assembly 100, and according to the principle that effort and reaction force are equal, the pressure value of pressure transmission assembly 100 can accurate reaction road bed to the effort of wheel body to accuracy when improving the detection road bed compactness.

In addition, the pressure sensor 200 is arranged in the pressure transmission assembly 100, and the pressure transmission assembly 100 is usually arranged in the vehicle body, so that the pressure sensor 200 is not easily exposed out of the vehicle body, the pressure sensor 200 is not easily damaged, and is not easily influenced by external devices, and the accuracy of the pressure sensor 200 in acquiring the numerical value is further improved. Moreover, the pressure sensor 200 is positioned in the vehicle body, so that the appearance of the road roller is not easily affected, and the appearance neatness of the road roller is improved.

The pressure sensor 200 is mounted in a flexible manner and may be located anywhere suitable on the pressure transmission assembly 100.

In one possible embodiment, the pressure transmission assembly 100 comprises: the pump body 120 is arranged on the circulating pipeline 110; the vibration motor 130 is disposed on the circulation pipeline 110, the wheel body is connected to the vibration motor 130, and the pressure sensor 200 is disposed on at least one of the circulation pipeline 110, the pump body 120, and the vibration motor 130.

In this embodiment, the pump body 120 and the vibration motor 130 are connected through the circulation pipeline 110, oil can circulate among the pump body 120, the circulation pipeline 110 and the vibration motor 130, the pump body 120 serves as a power source to provide power for the flow of the oil, and when the oil flows through the vibration motor 130, the oil can drive the output shaft of the vibration motor 130 to rotate, so as to drive the wheel body to vibrate through the vibration motor 130. The pressure sensor 200 may be mounted to any one of the circulation line 110, the pump body 120, and the vibration motor 130, improving the mounting flexibility of the pressure sensor 200. The pressure sensors 200 may be one, two or more, and when the pressure sensor 200 is one, the pressure sensor 200 may be mounted to the circulation line 110, the pump body 120 or the vibration motor 130, and when the pressure sensor 200 is two, two pressure sensors 200 may be simultaneously mounted to one component or two pressure sensors 200 may be mounted to different components, and the same applies when the pressure sensors 200 are plural.

In one possible embodiment, the pressure sensor 200 comprises: the first sub-sensor 210 is arranged on the circulation pipeline 110, the first sub-sensor 210 is positioned between the first port of the pump body 120 and the first port of the vibration motor 130, and the first port of the pump body 120 is communicated with the first port of the vibration motor 130 through the circulation pipeline 110; the second sub-sensor 220 is arranged on the circulation pipeline 110, the second sub-sensor 220 is positioned between the second port of the vibration motor 130 and the second port of the pump body 120, and the second port of the vibration motor 130 and the second port of the pump body 120 are communicated through the circulation pipeline 110; wherein, the pressure value measured by the first sub-sensor 210 is a first pressure value; or the pressure value measured by the second sub-sensor 220 is the first pressure value; or the difference between the pressure values measured by the first sub-sensor 210 and the second sub-sensor 220 is the first pressure value.

In this embodiment, the pump body 120 has two ports, one of the two ports is an oil inlet, the other of the two ports is an oil outlet, and the oil inlet and the oil outlet are not fixed, for example, the first port of the pump body 120 may be used as the oil inlet, and then the second port of the pump body 120 is used as the oil outlet, and if the first port of the pump body 120 is used as the oil outlet, then the second port of the pump body 120 is used as the oil inlet. Likewise, the vibration motor 130 also has two ports, and each port may be either an oil inlet or an oil outlet. In the present embodiment, it is defined that the pressure sensor 200 includes a first sub-sensor 210 and a second sub-sensor 220, the first sub-sensor 210 is disposed between the first port of the pump body 120 and the first port of the vibration motor 130, the second sub-sensor 220 is disposed between the second port of the pump body 120 and the second port of the vibration motor 130, if the first port of the pump body 120 is an oil outlet at this time, the first sub-sensor 210 obtains an oil inlet pressure, and the second sub-sensor 220 obtains an oil return pressure, and if the second port of the pump body 120 is an oil outlet, the first sub-sensor 210 obtains an oil return pressure, and the first sensor obtains an oil outlet pressure.

The vibration motor 130 is used for driving the wheel body to vibrate, the vibration motor 130 is generally composed of two parts, namely a motor body and a cam component, the cam component drives the wheel body to vibrate, when the vibration motor 130 rotates forwards or backwards, the vibration amplitude of the vibration motor 130 driving the wheel body to vibrate is different, so that after the steering of the vibration motor 130 is determined, which pressure sensor 200 is used as an effective sensor is determined.

For example, the pressure sensor 200 that measures the oil inlet pressure can be used as an effective sensor, so the first sub-sensor 210 and the second sub-sensor 220 can both be effective sensors, or both of the two sub-sensors can be used as effective sensors, and the pressure value that measures the oil inlet pressure and the pressure value that measures the oil return pressure are differentiated to obtain an effective pressure value. Set up pressure sensor 200 on advancing oil pipe way and returning oil pipe way respectively, can improve the accuracy of obtaining the pressure value, and then can improve the accuracy when examining the road bed compactness.

The first pressure value may be obtained by one pressure sensor, or the pressure values obtained by two or more pressure sensors may be subjected to a difference calculation to obtain the first pressure value.

In an embodiment of the application there is provided a roller comprising a hydraulic drive system as in any one of the embodiments described above, whereby the embodiment provides the full benefit of the hydraulic drive system as provided in any one of the possible designs described above.

The road roller also comprises a vehicle body, and the hydraulic transmission system is arranged on the vehicle body.

In some embodiments of the present application, a method of controlling a roller is provided for use with a roller as in any of the possible embodiments described above, and therefore the method of controlling a roller provided by this embodiment has all the benefits of the roller provided by any of the possible embodiments described above.

As shown in fig. 2, the method of controlling a roller comprises:

step S102, acquiring a first pressure value measured by a pressure sensor in the road roller;

and step S104, determining the target compaction degree according to the first pressure value.

The target compactness can be the compactness of the target roadbed, and when the compactness of the target roadbed is detected, a first pressure value in the pressure transmission channel is obtained through the pressure sensor. When pressure transmission assembly drive wheel body vibrates, if current road bed degree of compaction is less, the road bed is in the fluffy state of comparison promptly, and less hydraulic drive power just can drive the wheel body vibration this moment, if the degree of compaction of current road bed is great, the road bed is in the state of comparison tamping promptly, needs great hydraulic drive power just can drive the wheel body vibration this moment. Therefore, the degree of compaction of the roadbed can be represented by the first pressure value, the smaller the first pressure value acquired by the pressure sensor is, the smaller the degree of compaction of the roadbed is, and the larger the first pressure value acquired by the pressure sensor is, the larger the degree of compaction of the roadbed is. The compactness of current road bed can be confirmed to the first pressure value that acquires through pressure sensor, and moreover, the pressure transmission subassembly is the structure of direct drive wheel body vibration, so the effort of pressure transmission subassembly to the wheel body equals the effort of roadbed to the wheel body, and when the pressure transmission subassembly drove the wheel body vibration, the wheel body had not the loss to the reaction force of pressure transmission subassembly basically, so can accurately acquire the effort of roadbed to the wheel body. According to the principle that the acting force is equal to the reacting force, the first pressure value of the pressure transmission assembly can accurately reflect the acting force of the roadbed to the wheel body, and therefore the accuracy in the roadbed compactness detection is improved.

After the target compaction degree is obtained, the target compaction degree can be displayed, so that the working personnel can know the current compaction degree of the roadbed in time.

The first pressure value may be obtained by one pressure sensor, or the pressure values obtained by two or more pressure sensors may be subjected to a difference calculation to obtain the first pressure value, and the first pressure value in this embodiment may be the effective pressure value mentioned in the above embodiment.

As shown in fig. 3, in a possible embodiment, determining the target degree of compaction according to the first pressure value specifically includes:

step S202, comparing the first pressure value with prestored data;

step S204, determining the target compaction degree according to the comparison result of the first pressure value and the pre-stored data.

In this embodiment, when detecting the compaction degree of the target roadbed, the first pressure value is obtained first, then the first pressure value is compared with the prestored data, and according to the comparison result, the compaction degree of the current roadbed is determined, the prestored data is the corresponding relationship between different pressure values and corresponding compaction degrees, and the corresponding relationship between the pressure values and the compaction degrees may be data accumulated by measuring on the test road surface for many times, or the data obtained by detection may be stored in the memory after detecting the compaction degree every time. When the first pressure value is obtained, the compaction degree corresponding to the current first pressure value can be known only by finding the pressure value equal to the current first pressure value in the pre-stored data, and the difficulty of detecting the target compaction degree can be reduced and the detection speed can be improved without complex algorithms, such as steps of frequency spectrum change, intelligent algorithms and the like.

It is worth noting that in the embodiment, the target compactness is determined in a comparison mode, and the calculation method is simple, so that the calculation process can be completed through a controller of the road roller, a controller for calculating the compactness is not required to be added on the road roller, the space in a cab of the road roller is prevented from being occupied by too many controllers, and the cost for installing the controller is saved. And the pre-stored data is historical data, the historical data has better referential performance, and compared with the compaction degree obtained by algorithm calculation, the target compaction degree obtained by referring to the historical data is more accurate.

Of course, in other embodiments, a controller may be added to compare and store the data.

The pressure signal collected by the pressure sensor only needs to be filtered and then is compared with a database in the controller to obtain the current compactness, wherein the database is derived from a large amount of field construction data and experimental tests, but not theoretical calculation data.

After each construction, the vibration pressure and compaction degree value collected by the system are stored in a database to provide data reference for next detection of compaction degree.

The road roller further comprises a controller, the controller is used for being connected with the pressure sensor and the pressure transmission assembly, the controller acquires corresponding compaction degree in pre-stored data according to a first pressure value of the pressure sensor, and the controller controls the pump body in the pressure transmission assembly and the displacement of the vibration motor according to the first pressure value.

In a possible embodiment, as shown in fig. 4, the method for controlling a road roller further includes:

step S302, determining the displacement of a pump body and/or a vibration motor in the road roller according to the first pressure value.

In this embodiment, after the first pressure value is obtained, the displacement of the pump body/or the motor can be further determined according to the first pressure value, the displacement of the pump body and the displacement of the motor can determine the rotation speed of the motor, and the rotation speed of the motor can determine the amplitude and the vibration frequency of the wheel body. Through the discharge capacity that changes the pump body and the discharge capacity of motor, can effectively improve compaction efficiency.

As shown in fig. 5, in a possible embodiment, determining the displacement of the pump body and/or of the vibration motor in the road roller on the basis of the first pressure value comprises:

step S402, when the second pressure value is smaller than the first pressure value and smaller than the first set pressure value and smaller than the third pressure value, reducing the displacement of the pump body and/or increasing the displacement of the vibration motor; when the second pressure value is smaller than the second set pressure value and smaller than the first pressure value and smaller than the third pressure value, the displacement of the pump body is increased and/or the displacement of the vibration motor is reduced; when the first set pressure value is smaller than the second set pressure value, maintaining the displacement of the pump body and the displacement of the vibration motor;

the second pressure value is the minimum pressure value in the pre-stored data, the third pressure value is the maximum pressure value in the pre-stored data, and the first set pressure value is smaller than the second set pressure value.

In this embodiment, when comparing the first pressure value with the pre-stored data, first obtaining a maximum pressure value and a minimum pressure value in the pre-stored data, determining a pressure value range through the maximum pressure value and the minimum pressure value, and when the second pressure value is smaller than the first pressure value and smaller than the first set pressure value and smaller than the third pressure value, it is indicated that the first pressure value is smaller, and the displacement of the pump body needs to be reduced and/or the displacement of the vibration motor needs to be increased to reduce the rotation speed of the vibration motor, so that the amplitude of the wheel body can be increased, and the larger the amplitude of the wheel body is, the faster the tamping speed of the target roadbed is.

When the second pressure value is less than the second set pressure value and is less than the first pressure value and is less than the third pressure value, it is great to explain first pressure value this moment, needs the discharge capacity of the increase pump body and/or reduces vibrating motor's discharge capacity to increase vibrating motor's rotational speed, thereby improve the vibration frequency of wheel body, the wheel body vibrates fast, thereby can carry out even compaction to the road bed in the certain limit, improves the compaction degree of consistency. Through the two modes, the compaction efficiency is improved.

The first set pressure value and the second set pressure value are set according to different compaction degree requirements.

If the first pressure value is between the first set pressure value and the second set pressure value, the first pressure value is in a pressure range meeting the set requirement at the moment, and the displacement of the pump body and the displacement of the vibration motor do not need to be changed at the moment.

In a possible embodiment, as shown in fig. 6, the method for controlling a roller further comprises:

step S502, when the first pressure value is smaller than the second pressure value or the first pressure value is larger than the third pressure value, an alarm signal is output.

In this embodiment, when the first pressure value is less than the minimum pressure value in the prestored data or the first pressure value is greater than the maximum pressure value in the prestored data, it is described that the pressure in the pressure transmission assembly is abnormal at this time, and an alarm signal is output to remind a worker to check and process in time. The pre-stored data has referential property, so that the acquired first pressure value is not in the pressure range of the pre-stored data, the machine is not in a stable working state, an alarm signal is output, the road roller can be prevented from being further damaged, and the road roller can be maintained by a worker in time conveniently.

Supposing that the machine breaks down and causes the pressure release or build out when the pressure condition produces, the current system pressure value can be less than first pressure value or be higher than the second pressure value, surpasss effectual detection range promptly, and control system can report to the police this moment, and suggestion operating personnel system pressure is unusual.

In a possible embodiment, after determining the target degree of compaction, the method further includes: and storing the first pressure value and the target compaction degree.

In this embodiment, the detected compaction degree at each time can be stored in the memory, so that the pre-stored data is richer, and the larger the pre-stored data amount is, the more accurate the detected target compaction degree is.

In one possible embodiment, as shown in fig. 7, the method of controlling the roller comprises:

step S602, acquiring a first pressure value measured by a pressure sensor in the road roller;

step S604, filtering the first pressure value;

step S606, comparing the first pressure value with prestored data to obtain a target compactness;

step S608, if the first pressure value is within the preset range, step S610 is executed, otherwise step S612 is executed;

step S610, if the first pressure value reaches the set value, step S614 is executed, otherwise step S602 is executed;

step S612, outputting an alarm signal;

in step S614, the first pressure value and the target degree of compaction are stored.

As shown in fig. 8, in one embodiment of the present application, a control device 700 for a road roller is provided, comprising: memory 710, processor 720, and a computer program stored on memory 710 and executable on processor 720; the steps of the method for controlling a road roller according to any one of the above possible embodiments are implemented by the computer program executed by the processor 720, so that the control device for a road roller according to this embodiment can achieve the beneficial effects of the method for controlling a road roller according to any one of the above possible embodiments, and will not be described herein again.

In an embodiment of the present application, a readable storage medium is provided, where a control program of a road roller is stored on the readable storage medium, and the control program of the road roller is executed by a processor to implement the steps of the control method of the road roller in any one of the above possible embodiments, so that the readable storage medium provided in this embodiment can implement the beneficial effects of the control method of the road roller in any one of the above possible embodiments, and details thereof are not described here.

In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.