CN111692988A - Pavement structure depth detection system - Google Patents
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- CN111692988A CN111692988A CN202010554669.0A CN202010554669A CN111692988A CN 111692988 A CN111692988 A CN 111692988A CN 202010554669 A CN202010554669 A CN 202010554669A CN 111692988 A CN111692988 A CN 111692988A
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- 238000001514 detection method Methods 0.000 title claims abstract description 61
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- 239000011800 void material Substances 0.000 claims abstract description 29
- 238000003860 storage Methods 0.000 claims abstract description 19
- 238000005259 measurement Methods 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims description 36
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- 238000004519 manufacturing process Methods 0.000 abstract description 4
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- 238000010079 rubber tapping Methods 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/22—Measuring arrangements characterised by the use of optical techniques for measuring depth
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/002—Measuring arrangements characterised by the use of optical techniques for measuring two or more coordinates
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/30—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/42—Simultaneous measurement of distance and other co-ordinates
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Abstract
The invention 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, wherein the shell is provided with a storage battery; the laser scanner is arranged at the lower part of the shell, the control interface and the wiring port group are arranged on the surface of the shell, the storage battery and the microprocessor are arranged inside the shell, the microprocessor is respectively and electrically connected with the laser scanner, the control interface and the storage battery, and the wiring port group is electrically connected with the control interface and the microprocessor; the laser scanner is used for emitting and receiving laser diffuse reflection signals to the test surface; the microprocessor 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 is used for connecting a data line, a power supply line and a charging line. The invention has the advantages of convenient carrying, simple operation and low production cost.
Description
Technical Field
The invention relates to a detection technology, in particular to a pavement structure depth detection 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.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a pavement structure depth detection system which is convenient to carry, simple to operate and low in production cost.
In order to solve the technical problem, the invention 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, wherein the shell is provided with a light source; the laser scanner is arranged at the lower part of the shell, the control interface and the wiring port set are arranged on the surface of the shell, the storage battery and the microprocessor are arranged inside the shell, the microprocessor is respectively and electrically connected with the laser scanner, the control interface and the storage battery, and the wiring port set is respectively and electrically connected with the storage battery and the microprocessor; the laser scanner is used for emitting and receiving laser diffuse reflection signals to the test surface; the microprocessor 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 is used for connecting a data line, a power supply line and a charging line.
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, a 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.
As an improvement of the above, the step of converting the texture depth test value into a texture depth measurement value includes: establishing a fitting curve formula by a least square method; and converting the constructed depth test value into a constructed depth measurement value according to a fitting curve formula.
As an improvement of the above scheme, the step of establishing the fitting curve formula by the least square method comprises the following steps: selecting a preset number of test surfaces as a test surface set; acquiring laser full-reflection signals of each test surface in the test surface set one by one to serve as a sample signal set; 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; detecting each test surface in the test surface set one by one through 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 TD' is a measured value of the structural depth, TD is a measured value of the structural depth, and a and b are parameters of a fitting curve formula.
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.
The beneficial effects of the implementation of the invention are as follows:
the pavement structure depth detection system is convenient to carry, simple to operate and 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 of 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 pavement structure depth detection system of the present invention;
FIG. 4 is a flow chart of a system for detecting the depth of a pavement structure according to the present invention, in which a structural depth test value is converted into a structural depth measurement value;
FIG. 5 is a flow chart of a fitting curve formula established by a least squares method for the pavement structure depth detection system of the present invention;
FIG. 6 is a calibration plate with a test surface structure depth of 0.2mm when a laser scanner of the pavement structure depth detection 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 0.4mm when a 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 with a test surface structure depth of 0.7mm when a laser scanner of the pavement structure depth detection system of the present invention employs a chute and a laser profile scanner;
FIG. 9 is a calibration plate with a test surface structure depth of 1mm when a laser scanner of the pavement structure depth detection system of the present invention employs a chute and a laser section scanner;
FIG. 10 is a calibration plate with a test surface structure depth of 0.2mm when a three-dimensional laser scanner is used as the laser scanner of the pavement structure depth detection system of the present invention;
FIG. 11 is a calibration plate with a test surface structure depth of 0.4mm when a three-dimensional laser scanner is used as the laser scanner of the pavement structure depth detection system of the present invention;
FIG. 12 is a calibration plate for measuring the depth of the pavement structure of 0.7mm using a three-dimensional laser scanner as the laser scanner of the pavement structure depth measuring system of the present invention;
fig. 13 is a calibration plate in which the test surface structure depth is 1mm when the three-dimensional laser scanner is used as the laser scanner of the road surface structure depth detection system of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings. It is only noted that the invention is intended to be limited to the specific forms set forth herein, including any reference to the drawings, as well as any other specific forms of embodiments of the invention.
Fig. 1 is a schematic structural view of a pavement structure depth detection system according to a first embodiment of the present invention. Fig. 2 is an electrical connection diagram of the road surface structure depth detection system according to the first embodiment of the present invention. The first embodiment of the pavement structure depth detection system comprises a shell 1, a laser scanner 2, a control interface 3, a storage battery 4, a wiring port group 5 and a 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.
The pavement structure depth detection system is convenient to carry, simple to operate and 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 the first embodiment of the road surface structure depth detection system of the present invention in fig. 1, the laser scanner 2 includes a chute 21 and a laser profile scanner 22. 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 view of a pavement structure depth detection system according to a second embodiment 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 description will be made of a specific structure, data processing, operation process, and the like of the road surface structure depth detection system of the present invention, and unless otherwise specified, the following description is applicable to both the first embodiment and the second embodiment of the road surface structure depth detection system of the present invention.
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.
FIG. 4 is a flow chart for converting a constructed depth test value to a constructed depth measurement value, comprising the steps of:
and S101, establishing a fitting curve formula through a least square method.
And S102, converting the structure depth test value into a structure depth measurement value according to the fitting curve formula.
The current national specifications do not have the test result specification of the pavement structure depth detection system. According to the requirement of 'the quantity value of a measuring standard which is not established in China' of the laboratory qualification certification review criterion ', a satisfactory result is obtained through equipment comparison to provide a traceability evidence', in order to ensure the accuracy and the effectiveness of the detection data of the pavement structure depth detection system, a plurality of groups of data can be tested by the pavement structure depth detection system and the manual sanding method tester under the same condition, and the detection results of the two equipment are subjected to 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.
FIG. 5 is a flow chart for establishing a fitted curve equation by a least squares method, comprising the steps of:
s201, selecting a preset number of test surfaces as a test surface set.
S202, acquiring laser full-reflection signals of each test surface in the test surface set one by one to serve as a sample signal set.
S203, 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 S204, detecting each test surface in the test surface set one by one through a manual sanding method to form a manual standard depth set.
S205, 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 arrangement of the handle 11 is convenient for detection personnel to carry the pavement structure depth detection 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 electric quantity lamp 12 is used for displaying different electric quantity states, for example, when the electric quantity is higher than a preset electric quantity threshold value, the electric quantity lamp emits green light, otherwise, the electric quantity lamp emits red light, so as to remind detection personnel to take measures to prevent the use of the pavement structure depth detection system from being influenced by too low electric quantity.
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 power line interface 53 is used for connecting a power line to provide other power sources for the pavement structure depth detection system of the present invention, such as an indoor power source, and is connected to an indoor power socket through a power line, so that a storage battery is not needed, and sufficient electric quantity of the storage battery is ensured when the system is used outdoors. The power supply corresponding to the power line interface can be a 12V direct current power supply.
The following describes the operation steps of the pavement structure depth detection system of the present invention.
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.
Secondly, the pavement structure depth detection system of the present invention is placed at the position of the 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.
The calibration plate is used for correcting parameters of the pavement structure depth detection system, so that errors generated during actual detection are reduced. The calibration plate may include test faces of multiple build depths. For example, fig. 6 to 9 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. 10 to 13 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.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (9)
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 arranged at the lower part of the shell, the control interface and the wiring port set are arranged on the surface of the shell, the storage battery and the microprocessor are arranged inside the shell, the microprocessor is respectively and electrically connected with the laser scanner, the control interface and the storage battery, and the wiring port set is respectively and electrically connected with the storage battery and the microprocessor;
the laser scanner is used for emitting and receiving laser diffuse reflection signals to a test surface;
the microprocessor is used for calculating the void volume in the test surface according to the laser diffuse reflection signal, calculating the 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 is used for connecting a data line, a power supply line and a charging line.
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 1, wherein the calculation formula for calculating the pavement structure depth test value from the void volume is:
and TD is the pavement structure depth test value, V is the void volume, and S is the area of the test surface.
4. The pavement structure depth detection system of claim 1, wherein the step of converting the structure depth test value into a structure depth measurement value comprises:
establishing a fitting curve formula by a least square method;
and converting the constructed depth test value into a constructed depth measurement value according to the fitting curve formula.
5. The pavement structure depth detection system of claim 4, wherein the step of establishing a fitted curve formula by a least squares method comprises:
selecting a preset number of test surfaces as a test surface set;
acquiring laser full-reflection signals of each test surface in the test surface set one by one to serve as a sample signal set;
calculating the void volume in the test surface one by one through each laser diffuse reflection signal in the sample signal set, and calculating the pavement structure depth test value according to the void volume to form a sample depth test set;
detecting each test surface in the test surface set one by one through 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 TD' is the measured value of the structural depth, TD is the measured value of the structural depth, and a and b are parameters of a fitting curve formula.
6. The pavement structure depth detection system of claim 1, wherein a handle is provided on an upper surface of the housing.
7. 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.
8. 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.
9. 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.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112927366A (en) * | 2021-05-10 | 2021-06-08 | 中南大学 | Asphalt pavement structure depth measuring method |
| CN114739312A (en) * | 2022-04-26 | 2022-07-12 | 黄晓明 | Hand-held type road surface structure degree of depth laser survey device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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