CN212620605U - Pavement structure depth detection system - Google Patents
Pavement structure depth detection system Download PDFInfo
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- CN212620605U CN212620605U CN202021128321.7U CN202021128321U CN212620605U CN 212620605 U CN212620605 U CN 212620605U CN 202021128321 U CN202021128321 U CN 202021128321U CN 212620605 U CN212620605 U CN 212620605U
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Abstract
The utility model discloses a pavement structure depth detection system, which comprises a shell, a laser scanner, an operation interface, a storage battery, a wiring port group and a microprocessor; laser scanner installs in the casing lower part, controls interface and wiring mouth group and installs on the housing face, and battery and microprocessor install in the inside of casing, and microprocessor respectively with laser scanner, control interface and battery electricity and be connected, wiring mouth group with control interface and microprocessor electricity and be connected. Adopt the utility model discloses, carry convenient, easy operation, low in production cost.
Description
Technical Field
The utility model relates to a detection technology especially relates to a road surface structure degree of depth detecting system.
Background
The structural depth of the road surface is also called as texture depth, and is a form for representing the roughness of the road surface, the friction coefficients of the road surface and the texture depth are professional technical indexes of the anti-skid performance of a flat road surface, but the functions represented by the road surface and the texture depth are different, and the structural depth of the road surface is obtained by the ratio of the volume embedded into the gaps of the uneven road surface to the coverage area. The structural depth of the pavement is an index reflecting the skid resistance of the pavement.
At present, the common methods applied in engineering include a manual sanding method, an electric sanding instrument method, a vehicle-mounted laser structure depth instrument method and the like. The manual sanding method is a commonly used method in the current engineering; the electric sanding method avoids the defect that the manual sanding method has large variability of test results due to manual operation difference, but the operation process is more complicated, and the domestic use and popularization are not high at present; vehicular laser structure degree of depth appearance detection efficiency is high, the test result is stable, but this equipment is mostly a plurality of index comprehensive testing systems in road surface, and equipment cost is higher.
At present, a manual sanding method commonly used in China is used for testing the structural depth of a pavement. The structure depth measuring instrument for the manual sanding method mainly has the following defects:
1. the instrument is inconvenient to carry (a large amount of standard sand needs to be carried), the testing steps are complex, two persons are required for detection at the same time, the time is too long, and the efficiency is low.
2. Manual operation is needed in the whole detection process, the detection links such as sand filling and tapping methods cannot be quantized to standard, the force for tapping the measuring cylinder is different in size, and the errors of human factors such as difficulty in controlling the force in the paving process are large.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a road surface structure degree of depth detecting system is provided, it is convenient, easy operation to carry, low in production cost.
In order to solve the technical problem, the utility model provides a pavement structure depth detection system, which comprises a shell, a laser scanner, a control interface, a storage battery, a wiring port group and a microprocessor; laser scanner installs in the casing lower part, controls interface and wiring mouth group and installs on the housing face, and battery and microprocessor install in the inside of casing, and microprocessor respectively with laser scanner, control interface and battery electricity and be connected, wiring mouth group respectively with battery and microprocessor electricity and be connected.
As an improvement of the above scheme, the laser scanner comprises a chute and a laser section scanner; the laser section scanner is movably connected with the sliding groove so that the laser section scanner can horizontally slide on the sliding groove, and the laser section scanner is electrically connected with the microprocessor.
As an improvement of the scheme, the shell is in a square shape, the length of the shell is 400mm, the width of the shell is 350mm, and the height of the shell is 200 mm.
As an improvement of the scheme, the upper surface of the shell is provided with a handle.
As the improvement of the scheme, the upper surface of the shell is provided with an electric quantity lamp which is electrically connected with the microprocessor. As the improvement of the above scheme, the wiring port group comprises a USB interface, a charging wire interface and a power line interface, the USB interface and the power line interface are respectively electrically connected with the microprocessor, and the charging wire interface is electrically connected with the storage battery.
As an improvement of the scheme, the laser scanner is a three-dimensional laser scanner, and the three-dimensional laser scanner is electrically connected with the microprocessor.
As an improvement of the proposal, the shell is in a cylindrical shape, the diameter of the bottom surface of the shell is 400mm, and the height is 300 mm.
Implement the utility model has the advantages that:
implement the utility model discloses road surface structure degree of depth detecting system carries convenient, easy operation, low in production cost.
Specifically, a laser scanner is installed at a lower portion of the housing for emitting and receiving a laser diffuse reflection signal to a test surface to thereby acquire a detection signal reflecting a road surface construction depth in real time and transmit the detection signal to a microprocessor in real time, and the microprocessor is installed at an inside of the housing for calculating a void volume in the test surface through the laser diffuse reflection signal, calculating a road surface construction depth test value according to the void volume, and converting the construction depth test value into a construction depth measurement value to thereby rapidly calculate the road surface construction depth according to the detection signal. In addition, control interface and wiring mouth group and install on the casing surface, make things convenient for the measurement personnel to specifically control, derive data and charge. Because laser scanner, microprocessor, operation interface and wiring mouth group do not install in casing lower part, inside and upper surface, and the casing volume is less, makes things convenient for the measurement personnel to carry, and effectively reduces overall cost.
Drawings
Fig. 1 is a schematic structural view of a first embodiment of a pavement structure depth detection system according to the present invention;
FIG. 2 is an electrical connection diagram of a first embodiment of a pavement structure depth detection system according to the present invention;
FIG. 3 is a schematic structural view of a second embodiment of the system for detecting the depth of a pavement structure according to the present invention;
FIG. 4 is a calibration plate for measuring the structural depth of the road surface to be measured to be 0.2mm when the laser scanner of the road surface structural depth measuring system of the present invention employs a chute and a laser section scanner;
FIG. 5 is a calibration plate for measuring the structural depth of the road surface to be measured to be 0.4mm when the laser scanner of the road surface structural depth measuring system of the present invention employs a chute and a laser section scanner;
FIG. 6 is a calibration plate for measuring the structural depth of the road surface to be measured to be 0.7mm when the laser scanner of the road surface structural depth measuring system of the present invention employs a chute and a laser section scanner;
FIG. 7 is a calibration plate with a test surface structure depth of 1mm when the laser scanner of the pavement structure depth detection system of the present invention employs a chute and a laser section scanner;
FIG. 8 is a calibration plate for measuring the structural depth of the road surface to be measured to be 0.2mm when the laser scanner of the system for measuring the structural depth of the road surface of the present invention employs a three-dimensional laser scanner;
FIG. 9 is a calibration plate for measuring the structural depth of the road surface to be measured to be 0.4mm when the laser scanner of the system for measuring the structural depth of the road surface of the present invention employs a three-dimensional laser scanner;
FIG. 10 is a calibration plate for measuring the structural depth of the road surface to be measured to be 0.7mm when the laser scanner of the system for measuring the structural depth of the road surface of the present invention employs a three-dimensional laser scanner;
fig. 11 is a calibration plate with a 1mm test surface structure depth when the three-dimensional laser scanner is used as the laser scanner of the pavement structure depth detection system.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings. Only this statement, the utility model discloses the upper and lower, left and right, preceding, back, inside and outside etc. position words that appear or will appear in the text only use the utility model discloses an attached drawing is the benchmark, and it is not right the utility model discloses a concrete restriction.
Fig. 1 is a schematic structural diagram of a first embodiment of the system for detecting the depth of a pavement structure according to the present invention. Fig. 2 is an electrical connection diagram of the first embodiment of the system for detecting the depth of a pavement structure according to the present invention. The utility model discloses the first embodiment of road surface structure degree of depth detecting system includes casing 1, laser scanner 2, controls interface 3, battery 4, wiring mouth group 5 and microprocessor 6. Laser scanner installs in casing 1 lower part, controls interface 3 and wiring mouth group 5 and installs on casing 1 surface, and battery 4 and microprocessor 6 install in the inside of casing 1, and microprocessor 6 is connected with laser scanner 2, control interface 3 and battery 4 electricity respectively, and wiring mouth group 5 is connected with battery 4 and microprocessor 6 electricity respectively. The laser scanner 2 is used for emitting and receiving laser diffuse reflection signals to the test surface. The microprocessor 6 is used for calculating the void volume in the test surface according to the laser diffuse reflection signal, calculating a pavement structure depth test value according to the void volume, and converting the structure depth test value into a structure depth measurement value; the interface line group 5 is used for connecting a data line, a power line and a charging line.
Implement the utility model discloses road surface structure degree of depth detecting system carries convenient, easy operation, low in production cost.
Specifically, the laser scanner 2 is installed at a lower portion of the housing 1, and is configured to emit and receive a laser diffuse reflection signal to a test surface, thereby acquiring a detection signal reflecting a road surface structure depth in real time, and transmit the detection signal to the microprocessor 6 in real time, and the microprocessor 6 is installed inside the housing 1, and is configured to calculate a void volume in the test surface through the laser diffuse reflection signal, calculate a road surface structure depth test value from the void volume, and convert the structure depth test value into a structure depth measurement value, thereby rapidly calculating the road surface structure depth from the detection signal. In addition, control interface 3 and wiring mouth group 5 and install on casing 1 surface, make things convenient for the measurement personnel to specifically control, derive data and charge. Because laser scanner 2, microprocessor 6, operation interface 3 and wiring mouth group 5 install respectively in 1 lower part of casing, inside and upper surface, and the casing volume is less, makes things convenient for the measurement personnel to carry, and effectively reduces overall cost.
In fig. 1, the first embodiment of the system for detecting the depth of a pavement structure according to the present invention includes a chute 21 and a laser section scanner 22, which are included in a laser scanner 2. The laser section scanner 22 is movably connected with the sliding chute 21 so that the laser section scanner 22 horizontally slides on the sliding chute 21, and the laser section scanner 22 is electrically connected with the microprocessor 6.
By adopting the laser section scanner, the size of the test surface can be adjusted by adjusting the scanning range, and different test requirements can be met.
It should be noted that the laser scanner includes a chute structure, and a housing of the chute structure is square, so that the chute is mounted at a lower portion of the housing, and the laser section scanner slides on the chute to perform laser section scanning on the road surface. The cuboid-shaped shell has a length of 400mm, a width of 350mm and a height of 200 mm.
The microprocessor 6 may be a single chip microcomputer. The singlechip integrates a plurality of components such as an arithmetic unit, a controller, a memory, an input/output device and the like, and realizes a plurality of functions such as processing of laser diffuse reflection signals, data storage and the like. For example, the arithmetic unit can calculate and process the laser diffuse reflection signal according to a preset laser ranging algorithm, so that the specific gap height is obtained, and the gap volume is calculated. Preferably, the single chip microcomputer can adopt models including but not limited to AT89C 51.
Fig. 3 is a schematic structural diagram of a second embodiment of the pavement structure depth detection system of the present invention. Unlike the first embodiment, the laser scanner 2 in the second embodiment is a three-dimensional laser scanner, and the three-dimensional laser scanner is electrically connected to the microprocessor 6.
The three-dimensional laser scanner is adopted, so that the structure is simple, the installation is convenient, and the cost is lower.
The three-dimensional laser scanner is cylindrical, the scanning test surface of the three-dimensional laser scanner is a circular test surface, and the shell is correspondingly cylindrical, so that the three-dimensional laser scanner is convenient to mount and carry out three-dimensional laser scanning. The bottom surface of the cylindrical shell has a diameter of 400mm and a height of 300 mm.
The following is the utility model discloses road surface structure degree of depth detecting system's concrete structure, data processing and operation process etc. introduce, if do not have the special explanation, the following introduction all is applicable to the utility model discloses road surface structure degree of depth detecting system's first embodiment and second embodiment.
First, a process of calculating a void volume in a test surface from a laser light diffuse reflection signal will be described. When the laser scanner 2 adopts the chute and the laser section scanner, a laser pulse signal is emitted by the laser section scanner in the scanning process, and is reversely transmitted back to a receiver in the laser section scanner along the same path after being subjected to diffuse reflection on the surface of an object, so that the distance between a target point and the laser section scanner is calculated. And obtaining the coordinates of the measuring points in a user-defined coordinate system according to the distance, wherein for example, the X axis is in the transverse scanning plane, the Y axis is vertical to the X axis in the transverse scanning plane, and the Z axis is vertical to the transverse scanning plane, so that the coordinates in the coordinate system can be obtained according to the distance between the target point and the laser section scanner. Then the laser section scanner transmits diffuse reflection signals to the microprocessor 6, the microprocessor 6 processes the collected point cloud data and image data through post-processing software and converts the point cloud data and the image data into space position coordinates or a model in an absolute coordinate system, so that the void volume of the pavement material in a scanning area is calculated, and then the depth change of the surfaces of the pavement material particles and the depth change of the pavement material particles are calculated according to the void volume.
When the laser scanner 2 is a three-dimensional laser scanner, the three-dimensional laser scanner emits a laser pulse signal, which is reflected diffusely by the object surface and then transmitted back to a receiver in the three-dimensional laser scanner along the same path, thereby calculating the distance between the target point and the three-dimensional laser scanner. And obtaining the coordinates of the measuring points in a custom coordinate system according to the distance, wherein for example, the X axis is in the transverse scanning plane, the Y axis is vertical to the X axis in the transverse scanning plane, and the Z axis is vertical to the transverse scanning plane, so that the coordinates in the coordinate system can be obtained according to the distance between the target point and the scanner. Then the three-dimensional laser scanner transmits diffuse reflection signals to the microprocessor 6, the microprocessor 6 processes the collected point cloud data and image data through post-processing software and converts the point cloud data and the image data into space position coordinates or a model in an absolute coordinate system, so that the void volume of the pavement material in a scanning area is calculated, and then the surface of the pavement material particles and the depth change among the pavement material particles are calculated according to the void volume.
The calculation formula for calculating the road surface structure depth test value according to the void volume is as follows:
and TD is a pavement structure depth test value, V is a void volume, and S is the area of a test surface.
The area of the test surface may be set according to the user's needs. For example, when the laser scanner adopts a laser section scanner, the area of the test surface can be 0.09 square meter, and when the laser scanner adopts a three-dimensional laser scanner, the area of the test surface can be pi · 0.025 square meter.
Converting the formation depth test value to a formation depth measurement value comprises the steps of: firstly, a fitting curve formula is established through a least square method, and then a constructed depth test value is converted into a constructed depth measurement value according to the fitting curve formula.
The current standard of country does not the utility model discloses road surface structure degree of depth detecting system's test result regulation. According to the requirement "to the measurement of our country not having established the measurement benchmark" of "laboratory qualification affirmation review criterion", should provide the evidence of tracing to the source through equipment comparison acquisition satisfaction result ", for guaranteeing the utility model discloses the accuracy and the validity of pavement structure degree of depth detecting system detected data can be right under the same conditions the utility model discloses pavement structure degree of depth detecting system and manual sanding method apparatus test a plurality of groups of data to the testing result of these two kinds of equipment, carry out correlation analysis.
The analysis of the alignment data can be performed by correlation analysis using linear fitting, i.e., least squares. The following describes the procedure of finding the correlation equation and the correlation coefficient based on the data of the conventional standard manual sand-laying method measuring instrument.
The method for establishing the fitting curve formula by the least square method comprises the following steps: firstly, a preset number of test surfaces are selected as a test surface set. And then acquiring the laser full-reflection signals of each test surface in the test surface set one by one to serve as a sample signal set. And calculating the void volume in the test surface one by one through each laser diffuse reflection signal in the sample signal set, and calculating a pavement structure depth test value according to the void volume to form a sample depth test set. And detecting each test surface in the test surface set one by a manual sanding method to form a manual standard depth set. Establishing a fitting curve formula according to the sample depth test set and the manual standard depth set:
TD’＝aTD+b
and the step of measuring the depth of the sample by using a standard depth measuring method, wherein TD' is a manual standard depth measuring value, TD is a structural depth measuring value, and a and b are parameters of a fitting curve formula.
And obtaining a correlation relation and a correlation coefficient between the structural depth test value TD value and a manual standard depth measurement value TD 'tested by a manual sanding method, and converting the actually measured structural depth test value TD value into a structural depth TD' value of the manual sanding method.
The upper surface of the shell 1 is provided with a handle 11.
The setting of handle 11 makes things convenient for the measurement personnel to carry the utility model discloses a road surface structure degree of depth detecting system.
The upper surface of the shell 1 is provided with an electric quantity lamp 12, and the electric quantity lamp 12 is electrically connected with the microprocessor 6.
The wiring port group 5 comprises a USB interface 51, a charging wire interface 52 and a power line interface 53, the USB interface 51 and the power line interface 53 are respectively electrically connected with the microprocessor 6, and the charging wire interface 52 is electrically connected with the storage battery 4.
The USB interface 51 is used to connect to a data line to export data in the microprocessor to other devices, such as a computer, a mobile phone, a tablet computer, etc., for further analysis or directly issuing a detection report.
The charging line interface 52 is used for connecting a charging line to charge the storage battery, so that the electric quantity of the storage battery is prevented from being insufficient.
The following explains the operation steps of the system for detecting the depth of a pavement structure.
Firstly, selecting a test point on a test road section, determining the area of a test surface, and cleaning the test surface and a nearby road surface.
Second, will the utility model discloses road surface structure degree of depth detecting system places the position of test surface. And turning on a power switch, and starting up and preheating for 3 minutes. Relevant experimental information is input.
Thirdly, a calibration board is placed on the test surface for test calibration, a calibration function key on the control interface 3 is pressed, calibration data are displayed on a screen, and the calibration of the sensor is normal.
It should be noted that, the calibration plate is used for right the utility model discloses road surface structure degree of depth detecting system's parameter is rectified, reduces the error that appears when actually detecting. The calibration plate may include test faces of multiple build depths. For example, fig. 4 to 7 show the calibration plate when the laser scanner employs the chute and the laser section scanner, and the depths of the structures are 0.2mm, 0.4mm, 0.7mm, and 1mm, respectively. Further, for example, fig. 8 to 11 show a calibration plate in the case where a three-dimensional laser scanner is used as the laser scanner, and the structural depths are 0.2mm, 0.4mm, 0.7mm, and 1mm, respectively.
Fourthly, after the calibration is completed, pressing a 'start' function key on the control interface 3 to start the test.
Fifthly, the microprocessor 6 automatically calculates the structure depth detection result, and displays the test data on the control interface 3 and stores the test data in a memory card connected with the microprocessor 6.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.
Claims (8)
1. A pavement structure depth detection system is characterized by comprising a shell, a laser scanner, an operation interface, a storage battery, a wiring port group and a microprocessor;
the laser scanner is installed the casing lower part, control interface and wiring mouth group and install the casing surface, battery and microprocessor are installed the inside of casing, microprocessor respectively with laser scanner, control interface and battery electricity are connected, wiring mouth group respectively with battery and microprocessor electricity are connected.
2. The pavement structure depth detection system of claim 1, wherein the laser scanner includes a chute and a laser profile scanner;
the laser section scanner is movably connected with the sliding groove so that the laser section scanner can horizontally slide on the sliding groove, and the laser section scanner is electrically connected with the microprocessor.
3. The pavement structure depth detection system of claim 2, wherein the housing is a cuboid having a length of 400mm, a width of 350mm, and a height of 200 mm.
4. The pavement structure depth detection system of claim 1, wherein a handle is provided on an upper surface of the housing.
5. The pavement structure depth detection system of claim 1, wherein the housing has a power lamp disposed on an upper surface thereof, the power lamp being electrically connected to the microprocessor.
6. The system according to claim 1, wherein the connection port set includes a USB interface, a charging line interface and a power line interface, the USB interface and the power line interface are electrically connected to the microprocessor, respectively, and the charging line interface is electrically connected to the battery.
7. The pavement structure depth detection system of claim 1, wherein the laser scanner is a three-dimensional laser scanner, the three-dimensional laser scanner being electrically coupled to the microprocessor.
8. The system according to claim 7, wherein the housing has a cylindrical shape, and a bottom surface of the housing has a diameter of 400mm and a height of 300 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021128321.7U CN212620605U (en) | 2020-06-17 | 2020-06-17 | Pavement structure depth detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021128321.7U CN212620605U (en) | 2020-06-17 | 2020-06-17 | Pavement structure depth detection system |
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| Publication Number | Publication Date |
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| CN212620605U true CN212620605U (en) | 2021-02-26 |
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| CN202021128321.7U Active CN212620605U (en) | 2020-06-17 | 2020-06-17 | Pavement structure depth detection system |
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| CN (1) | CN212620605U (en) |
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