CN111021208A - Road surface ultrathin layer flatness control system and control method based on absolute elevation - Google Patents
Road surface ultrathin layer flatness control system and control method based on absolute elevation Download PDFInfo
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- CN111021208A CN111021208A CN201911170960.1A CN201911170960A CN111021208A CN 111021208 A CN111021208 A CN 111021208A CN 201911170960 A CN201911170960 A CN 201911170960A CN 111021208 A CN111021208 A CN 111021208A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/01—Devices or auxiliary means for setting-out or checking the configuration of new surfacing, e.g. templates, screed or reference line supports; Applications of apparatus for measuring, indicating, or recording the surface configuration of existing surfacing, e.g. profilographs
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Abstract
The invention discloses a road surface ultrathin layer flatness control system and a control method based on absolute elevation, wherein the system comprises intelligent road surface flatness detection equipment, a road surface elevation cloud chart generation system, a road surface ultrathin layer paragraph division system and an ultrathin layer construction flatness control system. The method can accurately measure the flatness of the lower bearing layer of the ultrathin layer, realize the real-time control of the paving thickness, improve the flatness of the ultrathin layer of the pavement and have wide application prospect.
Description
Technical Field
The invention belongs to the technical field of road engineering, and relates to a road surface ultrathin layer flatness control system and a road surface ultrathin layer flatness control method based on absolute elevation.
Background
Along with the continuous improvement of the living standard of people, the demand of people's trip is constantly rising, and the driving travelling comfort of road receives more and more attention. The pavement evenness is an important index for evaluating the pavement engineering quality and is also a main factor influencing the road driving comfort. The unevenness of the road surface can cause the vehicle to generate extra vibration in the high-speed driving process, influence the driving speed and the driving comfort, and even cause the occurrence of traffic accidents. In addition, vehicle vibration caused by uneven road surfaces increases the impact force of the vehicle on the road surface, which accelerates both the damage and wear of the vehicle.
In the process of road construction and maintenance, common road flatness measuring methods include a 3m straight rule method, a continuous pavement flatness meter and the like, but the methods have low measuring efficiency and low measuring precision when the number of measuring points is insufficient. Some advanced flatness measuring devices, such as laser flatness testers and vehicle-mounted jolt totalizers, are expensive and have high measuring cost.
After the road is in service for a certain period, the road flatness is reduced due to the actions of uneven settlement, driving load and the like. In addition, the road surface anti-skid properties are reduced due to the polishing of the aggregate on the road surface. At the moment, in order to improve the driving comfort and safety of the road without influencing the elevation of the road surface, the service performance of the road is generally improved by adopting a mode of paving an ultrathin wearing layer. But the original pavement elevation needs to be measured quickly, accurately and relatively economically before the ultrathin wearing layer is paved, and firstly, the flatness of the newly paved ultrathin layer is ensured; secondly, road interruption time is reduced, and traffic is opened quickly; and thirdly, the expenditure of maintenance cost is reduced.
In the process of paving a pavement, the angle of a screed plate of a paver is usually certain, and when an ultrathin layer is paved, the angle of the screed plate of the paver is not dynamically adjusted according to the elevation of a lower bearing layer, so that the flatness of the newly paved ultrathin layer cannot be ensured.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the problems in the prior art, the method can accurately measure the elevation data of the lower bearing layer of the ultrathin layer of the pavement, generate an elevation visual cloud chart, guide the cloud chart data into a pavement ultrathin layer paragraph dividing system, and then guide the dividing condition of the lower bearing layer of the ultrathin layer of the pavement into an ultrathin layer construction flatness control system, so that the paving precision of the ultrathin layer of the pavement is controlled, and the flatness of the ultrathin layer of the pavement is ensured.
The technical scheme is as follows: in order to realize the purpose, the invention adopts the following technical scheme:
the utility model provides a road surface ultrathin layer roughness control system based on absolute elevation, includes intelligent road surface roughness check out test set, road surface elevation cloud chart generation system, road surface ultrathin layer paragraph divide system and ultrathin layer construction roughness control system, wherein:
the intelligent pavement flatness detection equipment is used for acquiring absolute elevation data of a lower bearing layer of the ultrathin layer of the pavement;
the road surface elevation cloud picture generating system is used for generating a road surface elevation cloud picture from the absolute elevation data;
the road surface ultrathin layer paragraph dividing system is used for dividing the lower bearing layer of the road surface ultrathin layer according to the road surface elevation cloud chart;
the ultrathin layer construction flatness control system dynamically controls the angle of a screed of a paver according to the dividing condition of an ultrathin layer lower bearing layer of a pavement.
Optionally, the intelligent road flatness detecting device comprises two driving tracks, an integrated control module, an inclinometer, a positioning and information transmission module, a quick charging interface and a power switch, wherein the two driving tracks are respectively located at two sides of the integrated control module and are used for driving the whole intelligent road flatness detecting device to run forwards; the inclinometer is used for measuring the inclination angle of the intelligent pavement flatness detection equipment and transmitting angle information to the integrated control module; the positioning and information transmission module is used for acquiring an elevation coordinate at the measuring position and transmitting the elevation coordinate to the integrated control module; the integrated control module transmits absolute elevation information obtained after the angle information and the elevation coordinate are processed to a road surface elevation cloud picture generation system; the quick charging interface is used for quickly charging the intelligent pavement flatness detection equipment; the power switch is used for turning on and off the intelligent road surface flatness detection equipment.
Optionally, the integrated control module includes a housing and a processor disposed in the housing, a circuit and an information transmission system, a remote control system and a power supply battery, the processor is configured to process data measured by the inclinometer and the positioning and information transmission module, and transmit absolute elevation information of the measured position obtained by the processing to the road elevation cloud chart generation system, the circuit and the information transmission system are configured to ensure transmission of internal information of the intelligent road flatness detection apparatus, the remote control system is configured to receive a control terminal signal, and the power supply battery provides energy for the whole intelligent road flatness detection apparatus.
Optionally, the positioning and information transmission module adopts a 5G + Beidou technology to realize positioning and information transmission, and the quick charging interface is a Type-c quick charging interface.
Optionally, the road surface elevation cloud picture generation system generates the road surface ultrathin layer lower bearing layer elevation visual cloud picture through MATLAB software programming modeling.
The invention also discloses a road surface ultrathin layer flatness control method according to the road surface ultrathin layer flatness control system based on the absolute elevation, which comprises the following steps:
(1) acquiring absolute elevation data of a lower bearing layer of an ultrathin layer of the pavement;
(2) generating a road surface elevation cloud chart according to the acquired absolute elevation data;
(3) guiding the road surface elevation cloud chart into an ultrathin layer paragraph dividing system, and dividing an ultrathin layer lower bearing layer of the road surface;
(4) the ultrathin layer construction flatness control system dynamically controls the angle of a screed of the paver according to the dividing condition of an ultrathin layer lower bearing layer of the pavement.
Further, the step (1) is specifically as follows:
(11) placing intelligent pavement flatness detection equipment on an ultrathin pavement section to be paved, and pressing down a power switch;
(12) the positioning and information transmission module of the intelligent road flatness detection equipment detects the elevation coordinate of a lower bearing layer of the ultrathin layer of the road surface along a preset detection route parallel to the center line of the road, and transmits the elevation coordinate to the processor of the integrated control module;
(13) the inclinometer measures the inclination angle of the intelligent pavement flatness detection equipment and transmits angle information to the processor of the integrated control module;
(14) and a processor of the integrated control module processes the elevation coordinate and the angle information to acquire absolute elevation data.
Further, the step (2) is specifically as follows:
processing the absolute elevation data of the lower bearing layer of the ultrathin layer of the pavement, namely x, y and z three-dimensional coordinate data of the position where the intelligent pavement evenness detection equipment is located, acquired in the step (1), firstly, respectively rounding the maximum value and the minimum value of the x coordinate value and the y coordinate value, setting the step length, respectively dividing the x coordinate value and the y coordinate value according to the set step length to generate grid data of an x-y surface, then, fitting each pair of x coordinate data and y coordinate data with the corresponding z coordinate data, interpolating the data among grid points to smooth the grid three-dimensional image generated in the next step, then, generating a grid three-dimensional image, setting the grid three-dimensional image as a three-dimensional view angle, and finally, creating coordinate axis labels to generate a pavement elevation cloud image.
Further, the step (3) is specifically as follows:
based on the road surface elevation difference cloud picture, the road surface elevation difference cloud picture is divided by a preset step length on the longitudinal section by taking half L/2 of the width of a screed of a road paver as the step length on the cross section of the road surface, and the SUM SUM (V) of the product difference of the divided parts is calculated1) Dividing the SUM of the product differences of the divided parts by using the division unit that the screed needs to be rotated and adjusted by 0.5 degrees on the basis of the road surface cross slope value, and dividing the volume change delta V (pi) (L/2) when the screed is adjusted by 0.5 degrees2/720, the adjustment amount of the division part is theta1＝SUM(V1) 1440 SUM (Δ H)/(pi L), by which the amount θ is adjusted1And dividing the lower bearing layer of the ultrathin layer of the road surface.
Further, the step (4) is specifically as follows: and guiding the dividing condition of the lower bearing layer of the ultrathin layer of the pavement into an ultrathin layer construction flatness control system, and dynamically controlling the angle of a screed of a paver in the paving process to realize accurate control on the flatness of the ultrathin layer.
Has the advantages that: compared with the prior art, the pavement evenness detection equipment provided by the invention has the advantages that the elevation coordinates of the measured position are accurately obtained by adopting the '5G + Beidou' technology, the absolute elevation of the measured position is obtained by combining the inclination angle measured by the inclinometer and converting the absolute elevation by the processor, and the measurement accuracy can be improved from centimeter level to millimeter level compared with the traditional measurement method. And importing the elevation data into MATLAB software, and performing programming modeling to generate a visual cloud chart of the bearing layer elevation under the ultrathin layer of the pavement, so as to realize the visualization of the pavement elevation. The elevation data are led into the road surface ultrathin layer paragraph dividing system to divide the road surface ultrathin layer lower bearing layer, and then the dividing condition of the road surface ultrathin layer lower bearing layer is led into the paver control system, so that the dynamic control of the angle of the paver screed in the paving process is realized, and the paving flatness is improved. In addition, the pavement evenness detection equipment is small and exquisite in shape, convenient to carry and capable of being controlled remotely, and measuring cost can be saved; the crawler belt is adopted for driving, so that the measurement can be carried out in rainy days, the slipping is prevented, the driving stability during the measurement is improved, the measurement elevation of rainfall weather can be realized, the pavement is paved in fine weather, and the utilization rate of the fine weather is improved.
Drawings
FIG. 1 is a block diagram of the control system architecture of the present invention;
FIG. 2 is a block diagram of an intelligent pavement flatness detection apparatus;
FIG. 3 is a flow chart of a control method of the present invention;
FIG. 4 is a schematic diagram of the absolute height value of the road surface where the intelligent road surface flatness detecting device is located;
FIG. 5 is a schematic view of a road elevation cloud generated from a road elevation cloud generation model;
fig. 6 is a schematic illustration of a paver screed adjustment wherein (a) is a schematic illustration of a paver screed unadjusted; (b) is a schematic diagram after the ironing plate of the paver is adjusted;
in fig. 2: the system comprises a driving track 1, a 2-integrated control module, a 3-inclinometer, a 4-positioning and information transmission module based on the 5G + Beidou technology, a 5-Type-c quick charging interface and a 6-power switch.
Detailed Description
The technical solution of the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, a road surface ultrathin layer flatness control system based on absolute elevation comprises intelligent road surface flatness detection equipment, a road surface elevation cloud chart generation system, a road surface ultrathin layer paragraph division system and an ultrathin layer construction flatness control system.
As shown in fig. 2, the intelligent road flatness detecting device comprises two driving tracks 1, an integrated control module 2, an inclinometer 3, a positioning and information transmission module 4 based on the technology of '5G + big dipper', a Type-c quick charging interface 5 and a power switch 6. The two driving tracks 1 are respectively positioned at two sides of the integrated control module; the integrated control module 2 comprises a processor, a circuit, an information transmission system, a remote control system, a power supply battery and a shell; the inclinometer 3 is arranged on the integrated control module shell, is positioned at the front end of the advancing direction and is parallel to the advancing direction and the horizontal plane; the 5G + Beidou positioning and information transmission module 4 is positioned at the top of the integrated control module shell; the Type-c quick charging interface 5 is positioned on the outer side of the integrated control module shell; the power switch 6 is positioned outside the integrated control module shell.
As shown in fig. 1 and 2, the driving crawler 1 drives the whole flatness detection device to run forwards during measurement, and the driving crawler runs stably, so that the device can be ensured to run according to a preset detection line, and the direction cannot be changed due to uneven roads; the integrated control module 2 comprises a processor, a circuit, an information transmission system, a remote control system, a power supply battery and a shell, wherein the processor is used for processing data measured by the inclinometer 3 and the positioning and information transmission module 4 so as to process the data to obtain absolute elevation of a measured position and transmit the absolute elevation information to the pavement elevation cloud picture generation system; the inclinometer 3 can measure the inclination angle of the flatness detection equipment and transmit angle information to the processor of the integrated control module 2; the 5G + Beidou positioning and information transmission module 4 is used for acquiring an elevation coordinate at a measurement position and transmitting the elevation coordinate to the processor of the integrated control module 2, and then the processor transmits the acquired absolute elevation information to the road surface elevation cloud chart generation system through the 5G + Beidou positioning and information transmission module; the Type-c quick charging interface 5 is used for quickly charging the flatness detection equipment; the power switch 6 prevents additional consumption of electric power by turning on and off the flatness detecting device.
The road surface elevation cloud picture generation system receives road surface ultrathin layer lower bearing layer absolute elevation data measured by the intelligent flatness detection equipment through a notebook computer, a road surface elevation visualization program is compiled through MATLAB software, the absolute elevation data are imported into the compiled program, a road surface absolute elevation cloud picture is generated, and a road surface elevation cloud picture schematic diagram generated by the road surface elevation cloud picture generation model is shown in FIG. 5.
The ultrathin layer construction flatness control system is used for receiving road surface absolute elevation cloud chart data, leading the absolute elevation cloud chart data into the paver construction flatness control system, and adjusting the angle of a screed of a paver in real time when an ultrathin layer is paved so as to realize accurate control of the road surface ultrathin layer flatness.
As shown in fig. 3, a method for controlling the flatness of an ultrathin layer of a pavement based on absolute elevation includes the following steps:
(1) acquiring absolute elevation data of a lower bearing layer of an ultrathin layer of the pavement;
(11) placing intelligent pavement flatness detection equipment on an ultrathin pavement section to be paved, and pressing down a power switch;
(12) the positioning and information transmission module of the intelligent road flatness detection equipment detects the elevation coordinate of a lower bearing layer of the ultrathin layer of the road surface along a preset detection route parallel to the center line of the road, and transmits the elevation coordinate to the processor of the integrated control module;
(13) the inclinometer measures the inclination angle of the intelligent pavement flatness detection equipment and transmits angle information to the processor of the integrated control module;
(14) a processor of the integrated control module processes the elevation coordinate and the angle information to acquire absolute elevation data;
the processing mode of the elevation coordinate and the angle information is as follows: the method comprises the steps that x, y and z three-dimensional coordinate information of the position of intelligent road flatness detection equipment is obtained in real time through a positioning and information transmission module based on a '5G + Beidou' technology, wherein the x and y coordinates are directly used for representing the plane position of the intelligent road flatness detection equipment;
the method for acquiring the absolute elevation difference value of the road surface at the position of the intelligent road surface flatness detection equipment comprises the steps of recording the inclination angle of an inclinometer as α and the ground clearance of the inclinometer as H, and obtaining the absolute elevation value H of the road surface at the position of the intelligent road surface flatness detection equipment as z-H/cos α, wherein the absolute elevation difference delta H is H-H/cos α1In which H is1The absolute elevation value is designed for the original pavement, and the schematic diagram is shown in figure 4.
(2) Generating a road surface elevation cloud chart according to the acquired absolute elevation data; the method specifically comprises the following steps:
acquiring three-dimensional coordinate information of x, y and z of the position where the intelligent road surface flatness detection equipment is located in real time through a positioning and information transmission module based on a '5G + Beidou' technology, namely absolute elevation data of a lower bearing layer of the ultrathin layer of the road surface acquired in the step (1), importing MATLAB software, processing the imported three-dimensional coordinate data through a road surface elevation visualization program code, firstly respectively rounding the maximum value and the minimum value of the x coordinate value and the y coordinate value, setting the step length to be 1mm, then respectively dividing the x coordinate value and the y coordinate value according to the step length of 1mm by using a mesh grid function in the MATLAB software to generate grid data of an x-y surface, then fitting each pair of x coordinate data and y coordinate data with corresponding z coordinate data by using a grid data function in the MATLAB software, and interpolating data between grid points to smooth a grid three-dimensional graph generated in the next step, then generating a grid three-dimensional graph by adopting a mesh function in MATLAB software, setting the grid three-dimensional graph into a three-dimensional visual angle by adopting a view function in the MATLAB software, and finally creating coordinate axis labels by adopting xlabel, ylabel and zlabel functions in the MATLAB software, the road surface elevation cloud picture is generated through a road surface elevation visualization program code, an x axis in a road surface elevation cloud picture schematic diagram (figure 5) generated by a road surface elevation cloud picture generation model is used for representing a road surface cross section, an x coordinate value is used for representing the position of the road surface cross section of the position of intelligent road surface evenness detection equipment, a y axis represents a road surface longitudinal section, a y coordinate value is used for representing the position of the road surface longitudinal section of the position of the intelligent road surface evenness detection equipment, a z axis represents a road surface vertical surface, and a z coordinate value is used for representing the position of the road surface vertical surface of the position of the intelligent road surface evenness detection equipment, namely an absolute elevation value;
the road surface elevation visualization program code is as follows:
％％mesh
up _ x ═ ceil (max (x)); % rounding the scene size of the x coordinate value
Down _ x ═ floor (min (x)); % rounding the minimum value of the x coordinate values
Up _ y ═ ceil (max (y)); % rounding the scene size of the y coordinate value
Dome (mm (y)); % rounding the minimum value of the y coordinate value
1 for MeshGA; % step size 1
[ X, Y ] ═ meshgrid (Down _ X: MeshGA: Up _ X, Down _ Y: MeshGA: Up _ Y); % generation of grid data of X-Y plane
Z ═ griddata (X, Y, Z, X, Y); % makes the curved surface of the form z ═ f (x, y) fit to the scatter data in the vector (x, y, z)
mesh (X, Y, Z)% drawing grid three-dimensional graph
view (3)% three-dimensional graph view angle
xlabel ('x'), ylabel ('y'), zlabel ('z')% generates coordinate axes
The road elevation visualization program code is written by using MATLAB software, and a schematic diagram of a finally generated road elevation cloud picture is shown in FIG. 5. And similarly, converting z in the three-dimensional coordinates into delta H to generate the road surface absolute elevation difference cloud picture.
(3) And (4) leading the road surface elevation cloud chart into an ultrathin layer paragraph dividing system, and dividing the lower bearing layer of the ultrathin layer of the road surface.
The method specifically comprises the following steps:
based on the road surface elevation difference cloud picture, dividing the road surface elevation difference cloud picture by taking half L/2 of the width of a screed of a road paver as a step length on the cross section of the road surface and taking 1em as the step length on the longitudinal section of the road surface, and calculating the SUM SUM (V) of the product difference of the divided parts1) Dividing the SUM of the differences of the divided parts by dividing the screed into division units of which the degree of rotation of the screed is adjusted to 0.5 DEG on the basis of the road surface cross slope value, and dividing the volume change of the screed when the screed is adjusted to 0.5 DEG to [ pi ] (L/2)2/720, the adjustment amount of the division part is theta1＝SUM(V1) 1440 SUM (Δ H)/(pi L), by which the amount θ is adjusted1And dividing the lower bearing layer of the ultrathin layer of the road surface.
The code corresponding to the ultrathin layer paragraph division model algorithm is as follows:
and writing the ultrathin layer paragraph division model code by adopting MATLAB software, and dividing the lower bearing layer of the ultrathin layer of the road.
(4) The ultrathin layer construction flatness control system dynamically controls the angle of a screed of the paver according to the dividing condition of an ultrathin layer lower bearing layer of the pavement;
guiding the dividing condition of the lower bearing layer of the ultrathin layer of the pavement into an ultrathin layer construction flatness control system, and dynamically controlling the angle of a screed of a paver in the paving process to realize accurate control on the flatness of the ultrathin layer;
the adjusting mode of the ironing plate of the paver is as follows: the angle (camber) regulator of the telescopic screed makes the screed rotate around the hinged center of the screed, theta is theta10.5 °, screed adjustment schematic is shown in fig. 6. In fig. 6, the left screed and the right screed are used for controlling the thickness of the paving material and pre-compacting the paving material, the screed angle (camber) adjusting device is used for adjusting the angles (camber) of the left screed and the right screed respectively by stretching the length of the screed and taking the screed hinge center as an axis, so that the angle (camber) of the screed can be adjusted, and fig. 6(a) shows that the screed of the paver is not adjustedFig. 6(b) is a schematic diagram of the adjusted screed of the paver after the screed angle (camber) of the paver is adjusted according to the theta value by the ultra-thin layer construction flatness control system.
According to the road surface ultrathin layer flatness control system and method based on absolute elevation, the flatness of an underlying layer of an ultrathin layer can be accurately measured, the visual cloud chart of elevation data is generated, the cloud chart data is led into a paver control system, real-time control of paving thickness is achieved, the road surface ultrathin layer flatness is improved, and the road surface ultrathin layer flatness control system and method have wide application prospects.
Claims (10)
1. The utility model provides a road surface ultra-thin layer roughness control system based on absolute elevation which characterized in that: including intelligent road surface roughness check out test set, road surface elevation cloud chart generation system, road surface ultrathin layer paragraph divide system and ultrathin layer construction roughness control system, wherein:
the intelligent pavement flatness detection equipment is used for acquiring absolute elevation data of a lower bearing layer of the ultrathin layer of the pavement;
the road surface elevation cloud picture generating system is used for generating a road surface elevation cloud picture from the absolute elevation data;
the road surface ultrathin layer paragraph dividing system is used for dividing the lower bearing layer of the road surface ultrathin layer according to the road surface elevation cloud chart;
the ultrathin layer construction flatness control system dynamically controls the angle of a screed of a paver according to the dividing condition of an ultrathin layer lower bearing layer of a pavement.
2. The system for controlling the flatness of an ultrathin layer of pavement based on absolute elevation as claimed in claim 1, wherein: the intelligent road flatness detection equipment comprises two driving tracks (1), an integrated control module (2), an inclinometer (3), a positioning and information transmission module (4), a quick charging interface (5) and a power switch (6), wherein the two driving tracks are respectively positioned at two sides of the integrated control module and are used for driving the whole intelligent road flatness detection equipment to run forwards; the inclinometer is used for measuring the inclination angle of the intelligent pavement flatness detection equipment and transmitting angle information to the integrated control module; the positioning and information transmission module is used for acquiring an elevation coordinate at the measuring position and transmitting the elevation coordinate to the integrated control module; the integrated control module transmits absolute elevation information obtained after the angle information and the elevation coordinate are processed to a road surface elevation cloud picture generation system; the quick charging interface is used for quickly charging the intelligent pavement flatness detection equipment; the power switch is used for turning on and off the intelligent road surface flatness detection equipment.
3. The system of claim 2, wherein the integrated control module comprises a housing, and a processor, a circuit and information transmission system, a remote control system and a power supply battery which are arranged in the housing, wherein the processor is used for processing data measured by the inclinometer and the positioning and information transmission module and transmitting the processed absolute elevation information of the measured position to the road elevation cloud map generation system, the circuit and information transmission system are used for ensuring the transmission of internal information of the intelligent road flatness detection equipment, the remote control system is used for receiving control terminal signals, and the power supply battery provides energy for the whole intelligent road flatness detection equipment.
4. The system for controlling the flatness of the ultrathin layer of a pavement based on the absolute elevation as claimed in claim 2, wherein the positioning and information transmission module adopts a 5G + Beidou technology to realize positioning and information transmission, and the quick-charging interface is a Type-c quick-charging interface.
5. The system for controlling the flatness of an ultrathin layer of a pavement based on absolute elevation as claimed in claim 1, wherein the system for generating a cloud map of elevation of a pavement is used for generating a visual cloud map of elevation of a lower bearing layer of the ultrathin layer of the pavement through MATLAB software programming modeling.
6. The method for controlling the flatness of an ultrathin layer of a pavement according to any one of claims 1 to 5, wherein the method comprises the following steps:
(1) acquiring absolute elevation data of a lower bearing layer of an ultrathin layer of the pavement;
(2) generating a road surface elevation cloud chart according to the acquired absolute elevation data;
(3) guiding the road surface elevation cloud chart into an ultrathin layer paragraph dividing system, and dividing an ultrathin layer lower bearing layer of the road surface;
(4) the ultrathin layer construction flatness control system dynamically controls the angle of a screed of the paver according to the dividing condition of an ultrathin layer lower bearing layer of the pavement.
7. The method for controlling the flatness of the ultrathin layer of the pavement according to claim 6, wherein the step (1) is specifically as follows:
(11) placing intelligent pavement flatness detection equipment on an ultrathin pavement section to be paved, and pressing down a power switch;
(12) the positioning and information transmission module of the intelligent road flatness detection equipment detects the elevation coordinate of a lower bearing layer of the ultrathin layer of the road surface along a preset detection route parallel to the center line of the road, and transmits the elevation coordinate to the processor of the integrated control module;
(13) the inclinometer measures the inclination angle of the intelligent pavement flatness detection equipment and transmits angle information to the processor of the integrated control module;
(14) and a processor of the integrated control module processes the elevation coordinate and the angle information to acquire absolute elevation data.
8. The method for controlling the flatness of the ultrathin layer of the pavement according to claim 6, wherein the step (2) is specifically as follows:
processing the absolute elevation data of the lower bearing layer of the ultrathin layer of the pavement, namely x, y and z three-dimensional coordinate data of the position where the intelligent pavement evenness detection equipment is located, acquired in the step (1), firstly, respectively rounding the maximum value and the minimum value of the x coordinate value and the y coordinate value, setting the step length, respectively dividing the x coordinate value and the y coordinate value according to the set step length to generate grid data of an x-y surface, then, fitting each pair of x coordinate data and y coordinate data with the corresponding z coordinate data, interpolating the data among grid points to smooth the grid three-dimensional image generated in the next step, then, generating a grid three-dimensional image, setting the grid three-dimensional image as a three-dimensional view angle, and finally, creating coordinate axis labels to generate a pavement elevation cloud image.
9. The method for segmenting the ultrathin layer of the pavement according to claim 6, wherein the step (3) is specifically as follows:
based on the road surface elevation difference cloud picture, the road surface elevation difference cloud picture is divided by a preset step length on the longitudinal section by taking half L/2 of the width of a screed of a road paver as the step length on the cross section of the road surface, and the SUM SUM (V) of the product difference of the divided parts is calculated1) Dividing the SUM of the product differences of the divided parts by using the division unit that the screed needs to be rotated and adjusted by 0.5 degrees on the basis of the road surface cross slope value, and dividing the volume change delta V (pi) (L/2) when the screed is adjusted by 0.5 degrees2/720, the adjustment amount of the division part is theta1＝SUM(V1) 1440 SUM (Δ H)/(pi L), by which the amount θ is adjusted1And dividing the lower bearing layer of the ultrathin layer of the road surface.
10. The method for controlling the flatness of the ultrathin layer of the pavement according to claim 6, wherein the step (4) is specifically as follows: and guiding the dividing condition of the lower bearing layer of the ultrathin layer of the pavement into an ultrathin layer construction flatness control system, and dynamically controlling the angle of a screed of a paver in the paving process to realize accurate control on the flatness of the ultrathin layer.
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| Publication number | Priority date | Publication date | Assignee | Title |
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