1. A3D paving system based on matrix ultrasonic detection self-adaptive virtual paving thickness is characterized by comprising:

the paving machine is used for paving the ground and comprises a screed plate and balance beams arranged on two sides of the screed plate;

the detection equipment is used for measuring the ground clearance of each current ultrasonic detector, acquiring height data information, transmitting the height data information obtained based on the current position to the control end, comprises at least six ultrasonic detectors and is respectively arranged at the front, middle and rear ends of the paving machine;

the positioning equipment is used for synchronizing the incidence relation between the detection value of each ultrasonic detector and the plane position of the detector and comprises a GPS positioning device;

and the control end acquires the elevation of the design surface at the corresponding position and the elevation of the construction result surface of the upper structural layer through synchronous matching of the current position information of each detector, realizes self-adaptive dynamic change calculation of virtual paving control parameters, and sends an instruction to drive the paving machine based on the virtual paving control parameters.

2. The matrix-based ultrasonic detection adaptive virtual pavement thickness 3D paving system of claim 1, wherein: the balance beams are arranged in two groups and are respectively arranged on the left side and the right side of the ironing plate.

3. The matrix-based ultrasonic detection adaptive virtual pavement thickness 3D paving system of claim 2, wherein: the ultrasonic detectors are six and are uniformly arranged on the two balance beams.

4. The matrix-based ultrasonic detection adaptive virtual pavement thickness 3D paving system of claim 1, wherein: the GPS positioning device is a single-machine double-antenna GPS positioner with a PPS clock synchronization function.

5. The matrix-based ultrasonic detection adaptive virtual pavement thickness 3D paving system of claim 1, wherein: the ultrasonic detector is arranged at the front, middle and rear positions of the balance beam, and the collecting head of the ultrasonic detector is arranged downwards.

6. A method of detection according to any one of claims 1 to 5, comprising the steps of:

1) a, B, C three ultrasonic detectors are sequentially arranged on the balance beam, wherein the distance measurement value of the C detector is to the paved surface, and the distance measurement value A, B is to the unpaved surface;

2) calculating the current elevation angle of the large arm of the paver according to the paved distance measurement value of the point C and the unpaved distance measurement value of the point B, and calculating the trend forwards;

3) calculating whether the thickness from the trend to the point C is uniform according to the distance measurement of the point A, and accordingly, properly adjusting the point B;

4) collecting the original ground of the point B, adding the elevation of the original ground of the point B and the distance measurement value of the point B to obtain the absolute elevation of the point B on the big arm, and deducing the current elevation Z of the screed plate according to the geometric parameters of the vehicle body;

5) and comparing the derived screed elevation Z with the designed elevation Z' of the point, driving a paving controller to drive a left control box and a right control box in a pulse square wave mode based on the comparison result, and finally driving a hydraulic oil cylinder to realize automatic leveling and paving.

7. The inspection method according to claim 6, wherein in step 1), A, B, C three points are sequentially arranged at the front, middle and rear ends of the balance beam, and A, B, C three ultrasonic detectors are correspondingly arranged at A, B, C three points respectively.

8. The detection method according to claim 6, characterized in that in step 3), the distance measurement according to point A, B, C is used to make a smooth correction of the current screed movement trend at point B, i.e. the virtual paving elevation Z at which the keep-alive movement trend should be paved is added with a correction value Δ Z at point B.

9. The method as claimed in claim 8, wherein the correction value Δ Z is generated by the controller as a result of a corresponding square wave to drive the elevation hydraulic cylinder to perform corresponding actions, and the correction value Δ Z approaches zero when the original ground of the lower layer is smooth.

10. The inspection method according to claim 6, wherein in step 5), when Z > Z', the controller gives a motion trend command for lowering the screed; when Z < Z, the controller will give a trend command for the screed to be raised.

Background

The existing detection technology method for the paving thickness of the false pavement mainly comprises 2 methods:

1) piling hanging wire

The method is characterized in that a detector inserts a steel chisel into a roadbed layer on the original ground, the steel chisel marks the virtual paving position according to calculation, the steel chisel is pulled by a steel wire rope between the marking points, a contact type sliding shoe is used for contacting the steel wire rope, and the paver continuously adjusts the virtual paving thickness according to the contact induction of the sliding shoe in the advancing process.

2) Non-contact balance beam

The leveling principle is as follows: a plurality of ultrasonic wave or laser sensors installed on a horizontal beam test unevenness signals of a roadbed and upload the unevenness signals to a balance beam controller, the controller processes the data and then outputs a leveling oil cylinder control instruction, so that a traction point of the paver is always maintained on a given reference surface, the sensors and the ultrasonic sliding shoes are combined through an internal CAN bus network, different positions of a road surface are detected, the detected data are intelligently screened and processed, the processed data are sent to the controller, the controller judges the working state of the current paver according to the data, and then outputs a control signal for a leveling hydraulic system of the paver, and the purpose of automatic leveling is achieved. Ensure that the paver paves a smooth road surface.

The weaknesses of the prior art are as follows:

1) the manual wire hanging speed is low, the efficiency is low, and the precision is low;

2) the non-contact balance beam can only execute equal-thickness paving of a set value, and is equal to the copying of the previous layer; resulting in the dependence on the quality results of the construction process of the previous structural layer.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a 3D paving system and method based on matrix ultrasonic detection self-adaptive virtual paving thickness, which have the advantages of automatic detection, high precision and dynamic continuous detection.

The technical scheme adopted by the invention for solving the technical problems is as follows:

A3D paving system based on matrix ultrasonic detection self-adaptive virtual paving thickness comprises:

the paving machine is used for paving the ground and comprises a screed plate and balance beams arranged on two sides of the screed plate;

the detection equipment is used for measuring the ground clearance of each current ultrasonic detector, acquiring height data information, transmitting the height data information obtained based on the current position to the control end, comprises at least six ultrasonic detectors and is respectively arranged at the front, middle and rear ends of the paving machine;

the positioning equipment is used for synchronizing the incidence relation between the detection value of each ultrasonic detector and the plane position of the detector and comprises a GPS positioning device;

and the control end acquires the elevation of the design surface at the corresponding position and the elevation of the construction result surface of the upper structural layer through synchronous matching of the current position information of each detector, realizes self-adaptive dynamic change calculation of virtual paving control parameters, and sends an instruction to drive the paving machine based on the virtual paving control parameters.

Preferably, the balance beams are provided with two groups which are respectively arranged at the left side and the right side of the ironing plate.

Furthermore, the number of the ultrasonic detectors is six, and the ultrasonic detectors are uniformly arranged on the two balance beams.

Preferably, the GPS positioning device is a stand-alone dual-antenna GPS positioner having a PPS clock synchronization function.

Preferably, the ultrasonic detector is arranged at the front, middle and rear positions of the balance beam, and the collecting head of the ultrasonic detector is arranged downwards.

Another technical problem to be solved by the present invention is to provide the above detection method, which includes the following steps:

1) a, B, C three ultrasonic detectors are sequentially arranged on the balance beam, wherein the distance measurement value of the C detector is to the paved surface, and the distance measurement value A, B is to the unpaved surface;

2) calculating the current elevation angle of the large arm of the paver according to the paved distance measurement value of the point C and the unpaved distance measurement value of the point B, and calculating the trend forwards;

3) calculating whether the thickness from the trend to the point C is uniform according to the distance measurement of the point A, and accordingly, properly adjusting the point B;

4) collecting the original ground of the point B, adding the elevation of the original ground of the point B and the distance measurement value of the point B to obtain the absolute elevation of the point B on the big arm, and deducing the current elevation Z of the screed plate according to the geometric parameters of the vehicle body;

5) comparing the derived screed elevation Z with the designed elevation Z' of the point, driving a paving controller to drive a left control box and a right control box in a pulse square wave mode based on the comparison result, and finally driving a hydraulic oil cylinder to realize automatic leveling and paving;

preferably, in step 1), A, B, C three points are sequentially arranged at the front, middle and rear ends of the balance beam, and the A, B, C three ultrasonic detectors are correspondingly arranged at A, B, C three points respectively.

Preferably, in step 3), the distance measurement according to point A, B, C is used to smoothly correct the current screed movement trend at point B, i.e. the virtual paving elevation Z at which the movement trend should be maintained is increased by a correction value Δ Z.

Furthermore, the correction value Δ Z is a result of a corresponding square wave generated by the controller to drive the elevation hydraulic cylinder to make a corresponding action, and the correction value Δ Z approaches zero when the original ground of the lower layer is smooth.

Preferably, in step 5), when Z > Z', the controller gives a movement trend command for lowering the screed; when Z < Z, the controller will give a trend command for the screed to be raised.

The invention has the beneficial effects that:

1) the contact type sliding shoe is changed into a non-contact balance amount,

after the system is installed and debugged, a pile driving hanging wire and a guide beam are not needed to provide a reference; the virtual paving thickness is automatically controlled by a system in the whole paving process, and manual intervention is not needed;

2) high precision

The ultrasonic detector is generally installed at a ground clearance within the range of 40-50 cm, and the detection precision of the distance reaches millimeter level;

3) dynamic continuous, uninterrupted 24-hour construction, no need of erection of base station providing reference

The system automatically detects in the whole paving process, and the detection frequency is in millisecond level. The method is characterized in that the virtual pavement thickness is controlled in real time to form continuous virtual pavement, different from international existing solutions of 3D paving and no-wire hanging, the method needs to be stopped on site to wait for erecting a base station which provides an elevation reference, such as a total station or a sweep level. The invention needs the whole process of professional measurement team to watch, and the invention can automatically and continuously construct after the startup setting is finished.

Drawings

FIG. 1 is a schematic view of the installation of the detection equipment of the matrix-based ultrasonic detection adaptive virtual pavement thickness 3D paving system of the present invention;

FIG. 2 is a schematic diagram of the principle of the 3D paving method based on matrix ultrasonic detection of adaptive virtual pavement thickness according to the present invention;

FIG. 3 is a block flow diagram of the 3D paving method based on matrix ultrasonic detection adaptive virtual paving thickness of the present invention.

Detailed Description

The present invention is further described with reference to the following drawings and specific examples so that those skilled in the art can better understand the present invention and can practice the present invention, but the examples are not intended to limit the present invention.

Examples

Referring to fig. 1-3, a 3D paving system for adaptive virtual pavement thickness based on matrix ultrasound detection includes:

the paving machine is used for paving the ground and comprises a screed plate and balance beams arranged on two sides of the screed plate;

the detection equipment is used for measuring the ground clearance of each current ultrasonic detector, acquiring height data information, transmitting the height data information obtained based on the current position to the control end, comprises at least six ultrasonic detectors and is respectively arranged at the front, middle and rear ends of the paving machine;

the positioning equipment is used for synchronizing the incidence relation between the detection value of each ultrasonic detector and the plane position of the detector and comprises a GPS positioning device;

and the control end acquires the elevation of the design surface at the corresponding position and the elevation of the construction result surface of the upper structural layer through synchronous matching of the current position information of each detector, realizes self-adaptive dynamic change calculation of virtual paving control parameters, and sends an instruction to drive the paving machine based on the virtual paving control parameters.

The utility model discloses a positioning device of a balance beam, including screed, ultrasonic detector, GPS positioner, GPS clock synchronization function, GPS positioner, ultrasonic detector, set up two sets of, set up respectively in the left and right sides of screed, ultrasonic detector be equipped with six, equally divide and install on two balance beams, GPS positioner is the stand-alone dual antenna GPS locator that has PPS clock synchronization function, and this GPS locator is RTK high accuracy positioning antenna, ultrasonic detector sets up in the preceding well back position of balance beam, and its collecting head is setting up down.

A3D paving method based on matrix ultrasonic detection self-adaptive virtual paving thickness comprises the following steps:

1) a, B, C three ultrasonic detectors are sequentially arranged on the balance beam, wherein the distance measurement value of the C detector is to the paved surface, and the distance measurement value A, B is to the unpaved surface;

2) calculating the current elevation angle of the large arm of the paver according to the paved distance measurement value of the point C and the unpaved distance measurement value of the point B, and calculating the trend forwards;

3) calculating whether the thickness from the trend to the point C is uniform according to the distance measurement of the point A, and accordingly, properly adjusting the point B;

4) collecting the original ground of the point B, adding the elevation of the original ground of the point B and the distance measurement value of the point B to obtain the absolute elevation of the point B on the big arm, and deducing the current elevation Z of the screed plate according to the geometric parameters of the vehicle body;

5) comparing the derived screed elevation Z with the designed elevation Z' of the point, driving a paving controller to drive a left control box and a right control box in a pulse square wave mode based on the comparison result, and finally driving a hydraulic oil cylinder to realize automatic leveling and paving;

in the step 1), A, B, C three points are sequentially arranged at the front, middle and rear ends of the balance beam, and the A, B, C three ultrasonic detectors are respectively correspondingly arranged at the A, B, C three points.

In step 3), a smooth correction of the current screed movement trend is made at point B based on the distance measure at point A, B, C, i.e. a correction value Δ Z is added to the virtual paving elevation Z at point B at which the movement trend should be maintained.

The correction value delta Z is the result of a corresponding square wave generated by the controller to drive the elevation angle hydraulic oil cylinder to make corresponding action, and the correction value delta Z approaches to zero when the original ground of the lower layer is smooth.

In step 5), when Z > Z', the controller gives a movement trend instruction for descending the ironing plate; when Z < Z, the controller will give a trend command for the screed to be raised.

Description of the principle:

a beam is arranged on a large arm of the paving machine, A, B, C three ultrasonic detectors are arranged, and A, C two ultrasonic detectors are used for cooperating with a B detector. Carrying out multipoint smoothing on the actual virtual paving thickness by using a general algorithm of a balance beam of a paving controller, wherein the distance measurement value of a detector C is to the paved surface, the detection value of the detector A, B is to the unpaved surface, and the balance beam controller is provided with a smoothing algorithm, namely the current elevation angle of the big arm of the paver is calculated by using the paved distance measurement value of the point C and the unpaved distance measurement value of the point B; the trend is calculated forwards, and whether the thickness is uniform from the trend to the point C is calculated according to the distance measurement of the point A, so that the point B is properly adjusted to ensure the uniformity and smoothness of the whole thickness, which is a black box algorithm carried by a balance beam, and the method is briefly introduced; equivalently, a smooth correction is carried out on the current movement trend of the screed at the point B according to the distance measurement of the point A, B, C, namely, a correction value delta Z is added to a virtual paving elevation Z at the point B, wherein the virtual paving elevation Z is required to be paved when the movement trend of the screed is kept; this az is of course the result of the controller generating a corresponding square wave to drive the elevation hydraulic ram to make the corresponding action.

On the basis, the acquisition of the original ground of the point B is considered, the absolute elevation of the point B on the large arm is obtained by adding the original ground elevation of the point B and the distance measurement value of the point B, and then the current elevation Z of the screed, namely the absolute elevation of the line segment L in the figure 2, is deduced according to the geometric parameters of the vehicle body.

Comparing the derived screed plate elevation Z with the designed elevation Z' of the point; at the moment, a closed loop control is formed, and when Z is larger than Z', the controller gives a movement trend of descending the ironing plate; when Z < Z, the controller gives a movement trend for lifting the ironing plate; therefore, the paving controller is driven to drive the left and right control boxes in a pulse square wave mode, and finally the hydraulic oil cylinder is driven to realize automatic leveling and paving. The aforementioned A, C two detectors and B detector simultaneously implement a controller-based closed-loop algorithm, which is equivalent to adding a correction value Δ Z to Z approaching Z', and since leveling is a convergence approach, this Δ Z approaches zero when the underlying surface is smooth. Therefore, the elevation of the paved point B is ensured to approach the design value, and the smoothness before and after paving is ensured.

The invention has the beneficial effects that:

1) the contact type sliding shoe is changed into a non-contact balance amount,

after the system is installed and debugged, a pile driving hanging wire and a guide beam are not needed to provide a reference; the virtual paving thickness is automatically controlled by a system in the whole paving process, and manual intervention is not needed;

2) high precision

The ultrasonic detector is generally installed at a ground clearance within the range of 40-50 cm, and the detection precision of the distance reaches millimeter level;

3) dynamic continuous, uninterrupted 24-hour construction, no need of erection of base station providing reference

The system automatically detects in the whole paving process, and the detection frequency is in millisecond level. The method is characterized in that the virtual pavement thickness is controlled in real time to form continuous virtual pavement, different from international existing solutions of 3D paving and no-wire hanging, the method needs to be stopped on site to wait for erecting a base station which provides an elevation reference, such as a total station or a sweep level. The invention needs the whole process of professional measurement team to watch, and the invention can automatically and continuously construct after the startup setting is finished.

The above-described embodiments of the present invention are not intended to limit the scope of the present invention, and the embodiments of the present invention are not limited thereto, and various other modifications, substitutions and alterations can be made to the above-described structure of the present invention without departing from the basic technical concept of the present invention as described above, according to the common technical knowledge and conventional means in the field of the present invention.