A laser measuring device for a road surface

Abstract

This invention relates to the field of laser measurement equipment technology, specifically a laser measurement device for highway pavement. It mainly includes a measuring vehicle with a fixed base at its bottom and a mounting bracket at the bottom of the fixed base. The reciprocating mechanism in this invention drives the laser probe to rotate back and forth through a fixed structure, allowing the tilt angle of the laser probe to be changed repeatedly. This enables the laser probe to detect wider road surfaces. Multiple laser probes are arranged at the bottom of the same supporting longitudinal beam to form a continuous detection range. An tilt sensor can detect the tilt angle of the laser probe in real time. The measuring vehicle calculates road surface parameters in real time based on the data detected by the tilt sensor and the laser probe, and records and transmits these parameters, effectively adjusting the laser coverage range. This allows the measuring vehicle to adapt to highways of different widths without requiring multiple lane changes, solving the problems of fixed laser probes and unadjustable coverage range in existing equipment.

Description

Technical Field

[0001] This invention relates to the field of laser measurement equipment technology, specifically to a laser measurement device for highway pavement. Background Technology

[0002] As a core infrastructure of the transportation system, the quality of highway pavement directly affects driving safety, ride comfort, and road network efficiency. Geometric parameters such as pavement smoothness, rut depth, and elevation undulation are core indicators for measuring pavement quality. To ensure the quality of highway construction and the safety of operation and maintenance, it is necessary to use professional highway pavement measurement equipment to accurately detect these geometric parameters. Currently, the mainstream highway pavement measurement equipment mainly includes contact measurement equipment and non-contact measurement equipment. Laser measurement equipment is a type of non-contact measurement equipment. Due to its advantages such as high measurement accuracy, fast response speed, and no need to contact the road surface, it has gradually replaced traditional contact equipment and become the mainstream choice for long-distance highway inspection and large-scale maintenance surveys. Existing laser measurement equipment for highway pavement mainly consists of a testing vehicle, battery, laser probe, and data acquisition unit. During use, the testing vehicle travels along the highway, and the data acquisition unit detects pavement parameters in real time through the laser probe, thereby calculating geometric parameters such as pavement smoothness and rut depth.

[0003] However, in existing laser measurement equipment for highway pavements, the laser probe is fixedly installed on the inspection vehicle, which cannot adjust the laser coverage range according to the inspection needs of different lane widths and different pavement materials. The adaptability is poor, and the inspection vehicle needs to change lanes multiple times to inspect the entire lane due to the limitation of the detection range. The inspection efficiency is low, and it is time-consuming and labor-intensive. Therefore, there is an urgent need to design a laser measurement device for highway pavements. Summary of the Invention

[0004] The purpose of this invention is to provide a laser measurement device for highway pavement, in order to solve the problems mentioned in the background art, where the laser probe is fixedly installed on the inspection vehicle, making it impossible to adjust the laser coverage range according to the inspection requirements of different lane widths and different pavement materials, resulting in poor adaptability, and the inspection vehicle needs to change lanes multiple times to inspect the entire lane due to the limitation of the detection range, leading to low detection efficiency and time and labor costs.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A laser measurement device for highway pavement includes: a measurement vehicle, a fixed base mounted on the bottom of the measurement vehicle, a mounting bracket mounted on the bottom of the fixed base, a synchronization mechanism mounted in the middle of the mounting bracket, a fixing structure mounted on the bottom of the mounting bracket, a laser probe mounted on the bottom of the fixing structure, and a reciprocating mechanism and a linkage mechanism mounted on the side of the fixing structure.

[0006] Preferably, the measuring vehicle includes a vehicle body, a battery and a control module installed inside the vehicle body, a cover plate installed on the top surface of the vehicle body, and an antenna installed on the top surface of the cover plate.

[0007] Preferably, the fixed base includes a U-shaped hole, which is opened on the bottom surface of the vehicle body. Two fixed crossbeams are fixedly connected between the left and right sides of the inner cavity of the U-shaped hole, and the mounting bracket bolts are installed on the bottom surface of the fixed crossbeams.

[0008] Preferably, the mounting bracket includes a mounting longitudinal beam, which is bolted to the bottom surface of two fixed crossbeams. Both ends of the bottom surface of the mounting longitudinal beam are fixedly connected to mounting blocks. The mounting blocks have mounting holes inside, and support crossbeams are installed inside the mounting holes. The two ends of the two support crossbeams located on the same side of the mounting longitudinal beam are fixedly connected to the same load-bearing longitudinal beam, and the fixing structure is installed on the bottom surface of the load-bearing longitudinal beam.

[0009] Preferably, the supporting beam uses an electric telescopic rod, and the outer sleeve of the electric telescopic rod is movably inserted into the mounting hole.

[0010] Preferably, the bearing longitudinal beam has a T-shaped channel inside, and end caps are inserted at both ends of the T-shaped channel. The two end caps at the same end of the two bearing longitudinal beams are respectively fixedly connected to the two ends of the corresponding supporting crossbeams. Two inner plates are movably inserted inside a single T-shaped channel. A vertical plate is fixedly connected to the top surface of the inner plate. The top of the vertical plate passes through the opening of the T-shaped channel and is fixedly connected to an outer plate. A top shaft is fixedly connected to the middle position of the top surface of the outer plate. A synchronization mechanism is installed outside the top shaft. A receiving groove is opened on the top surface of the inner plate, and a roller is installed inside the receiving groove.

[0011] Preferably, the synchronization mechanism includes a positioning shaft, the top of which is fixedly connected to the middle of the bottom surface of the mounting longitudinal beam. An upper strip and a lower strip are movably sleeved on the outside of the positioning shaft. The bottom surface of the upper strip is in contact with the top surface of the lower strip. The upper strip and the lower strip are staggered to form an X-shaped structure. Insertion holes are provided at the ends of the upper strip and the lower strip. The four top shafts are movably inserted into the four insertion holes respectively.

[0012] Preferably, the fixing structure includes two wall panels, which are located on both sides of the laser probe. The top of the wall panels is fixedly connected to the bottom surface of the supporting longitudinal beam. Both wall panels have through holes at their bottom ends, and the same flip shaft is movably inserted into the two through holes. The flip shaft is fixedly installed on the top of the laser probe.

[0013] Preferably, the reciprocating mechanism includes a power box, the top surface of which is fixedly connected to the bottom end of the positioning shaft. A data acquisition device is bolted to the side of the positioning shaft. Fixing holes are provided on both sides of the power box located on both sides of the data acquisition device. A drive motor is bolted to the top surface of the inner cavity of the power box. A drive bevel gear is fixedly sleeved on the output shaft of the drive motor. A transmission shaft is installed inside each of the two fixing holes through bearings. A driven bevel gear is fixedly sleeved at one end of the transmission shaft located inside the power box. Both driven bevel gears mesh with the drive bevel gear. The bottom end of the power box is open. A bottom cover is fitted onto the bottom end of the power box. The bottom cover is bolted to the power box. The transmission shaft is hollow. Two strip grooves are symmetrically opened on the inner wall of the transmission shaft. An inner rod is inserted into the transmission shaft. Two wing strips are symmetrically installed on the surface of the inner rod. The wing strips are inserted into the strip grooves. The end of the inner rod away from the transmission shaft is fixedly connected to the end of the tilting shaft.

[0014] Preferably, multiple laser probes are installed on the bottom surface of the bearing longitudinal beam through multiple fixed structures. Only the flipping shaft corresponding to the fixed structure in the middle of the bearing longitudinal beam is connected to the inner rod. The laser probes on the two bearing longitudinal beams are tilted in opposite directions. The linkage mechanism is installed between all the fixed structures on the same bearing longitudinal beam. The linkage mechanism includes an outer tube, which is fixedly connected to the side of the bearing longitudinal beam away from the positioning shaft. A linkage bar is movably inserted inside the bearing longitudinal beam. A linkage wheel is fixedly connected to the side of the linkage bar facing the wall panel. A flipping strip is fixedly installed at the end of the flipping shaft away from the inner rod. A displacement sliding hole is opened on the flipping strip. The linkage wheel is inserted into the displacement sliding hole. A movable pin is fixedly installed at the end of the flipping strip away from the laser probe. The movable pin is connected to a fixed pin through a gravity spring. The fixed pin is threadedly installed on the surface of the bearing longitudinal beam.

[0015] Preferably, an tilt sensor is bolted to the flip-up strip corresponding to the fixing structure at the middle position of the bearing longitudinal beam.

[0016] The beneficial effects that can be achieved by the above embodiments of the present invention include: 1. The reciprocating mechanism in this invention can drive the laser probe to rotate back and forth through a fixed structure, so that the tilt angle of the laser probe can be changed repeatedly. This allows the laser probe to detect a wider road surface. With multiple laser probes set at the bottom of the same supporting longitudinal beam, a continuous detection range is formed. The tilt angle of the laser probe can be detected in real time through the tilt angle sensor. The measuring vehicle calculates road surface parameters in real time based on the data detected by the tilt angle sensor and the data detected by the laser probe, and records and transmits the parameters. The laser coverage range can be effectively adjusted. It can adapt to roads of different widths without the need for the measuring vehicle to change lanes multiple times, and solves the problem of fixed laser probes and unadjustable coverage range in existing equipment.

[0017] 2. This invention, through the coordinated action of the supporting beam and the synchronization mechanism, can flexibly adjust the distance between the two supporting longitudinal beams. Then, by controlling the reciprocating speed of the laser probe through the reciprocating mechanism, it can adapt to the driving speed of the measuring vehicle in real time, so that the detection areas of the laser probes on the two supporting longitudinal beams can form complementary connections in the direction of travel, realizing uninterrupted and efficient detection of the entire road surface, greatly reducing detection time and improving detection efficiency.

[0018] 3. This invention, through the cooperation of the outer sleeve, linkage bar, linkage wheel, flipping strip, and displacement sliding hole of the linkage mechanism, enables all laser probes on the same bearing longitudinal beam to flip synchronously, avoiding data corruption caused by inconsistent flipping angles of individual laser probes. The linkage mechanism, through the cooperation of movable pin, gravity spring, and fixed pin, applies a stable pulling force to the flipping strip, making the linkage wheel tightly adhere to the inner side of the displacement sliding hole, avoiding shaking caused by gaps between the linkage wheel and the displacement sliding hole, and significantly improving the accuracy of road surface parameter detection. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 For the present invention Figure 1 A schematic diagram of the split structure; Figure 3 For the present invention Figure 2 A three-dimensional structural diagram of the mounting bracket; Figure 4 For the present invention Figure 3 A three-dimensional structural diagram of the load-bearing longitudinal beam; Figure 5 For the present invention Figure 3 A three-dimensional structural diagram of the inner and outer panels; Figure 6 For the present invention Figure 3 A three-dimensional structural diagram of the fixed structure in the middle; Figure 7 For the present invention Figure 6 A schematic diagram of the three-dimensional structure from another perspective; Figure 8 For the present invention Figure 3 A three-dimensional structural diagram of the reciprocating mechanism; Figure 9 For the present invention Figure 8 A schematic diagram of the split structure; Figure 10 For the present invention Figure 3 A three-dimensional structural diagram of the central drive shaft.

[0020] In the picture: 1. Measurement vehicle; 101. Vehicle body; 102. Battery; 103. Control module; 104. Cover plate; 105. Antenna; 106. Laser probe; 2. Fixed base; 201. U-shaped hole; 202. Fixed crossbeam; 3. Mounting bracket; 301. Mounting longitudinal beam; 302. Mounting block; 303. Mounting hole; 304. Supporting crossbeam; 305. Bearing longitudinal beam; 306. T-shaped channel; 307. End cap; 308. Inner plate; 309. Vertical plate; 310. Outer plate; 311. Top shaft; 312. Receiving groove; 313. Roller; 4. Synchronization mechanism; 401. Positioning shaft; 402. Upper strip; 403. Lower strip; 404. Insertion hole; 5. Fixed structure; 501. Wall panel; 502. Tilting shaft; 6. Reciprocating mechanism; 601. Power box; 602. Data acquisition unit; 603. Fixing hole; 604. Drive motor; 605. Drive bevel gear; 606. Transmission shaft; 607. Driven bevel gear; 608. Bottom cover; 609. Inner rod; 7. Linkage mechanism; 701. Outer tube; 702. Linkage bar; 703. Linkage wheel; 704. Tilting strip; 705. Displacement sliding hole; 706. Movable pin; 707. Gravity spring; 708. Fixed pin; 8. Tilt sensor. Detailed Implementation

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0023] like Figures 1-10 As shown, this application provides a laser measurement device for highway pavement, including: a measurement vehicle 1, a fixed base 2 installed at the bottom of the measurement vehicle 1, a mounting bracket 3 installed at the bottom of the fixed base 2, a synchronization mechanism 4 installed in the middle of the mounting bracket 3, a fixing structure 5 installed at the bottom of the mounting bracket 3, a laser probe 106 installed at the bottom of the fixing structure 5, and a reciprocating mechanism 6 and a linkage mechanism 7 installed on the side of the fixing structure 5.

[0024] The measuring vehicle 1 includes a vehicle body 101, inside which a battery 102 and a control module 103 are installed. A cover plate 104 is installed on the top surface of the vehicle body 101, and an antenna 105 is installed on the top surface of the cover plate 104 for transmitting and receiving signals.

[0025] The vehicle body 101 is an unmanned electric vehicle, which is equipped with a speed sensor. The control module 103 can detect the speed of the electric vehicle through the speed sensor.

[0026] Please see Figure 1 and Figure 2 The fixed base 2 includes a U-shaped hole 201, which is opened on the bottom surface of the vehicle body 101. Two fixed crossbeams 202 are fixedly connected between the left and right sides of the inner cavity of the U-shaped hole 201. The two fixed crossbeams 202 are symmetrical about the center surface of the vehicle body 101. The mounting bracket 3 is bolted to the bottom surface of the fixed crossbeams 202.

[0027] Please see Figure 2 and Figure 3 The mounting bracket 3 includes a mounting longitudinal beam 301, which is bolted to the middle of the bottom surface of two fixed crossbeams 202. The extension direction of the fixed crossbeams 202 is perpendicular to the extension direction of the mounting longitudinal beam 301. Mounting blocks 302 are fixedly connected to both ends of the bottom surface of the mounting longitudinal beam 301. Mounting blocks 302 have mounting holes 303 at their bottom ends. Supporting crossbeams 304 are installed inside the mounting holes 303. The extension direction of the supporting crossbeams 304 is perpendicular to the extension directions of both the mounting longitudinal beam 301 and the mounting blocks 302. The two ends of the two supporting crossbeams 304 on the same side of the mounting longitudinal beam 301 are fixedly connected to the same bearing longitudinal beam 305. The fixing structure 5 is installed on the bottom surface of the bearing longitudinal beam 305.

[0028] The supporting beam 304 uses an electric telescopic rod. The outer tube of the electric telescopic rod is movably inserted into the mounting hole 303, and the outer tube of the electric telescopic rod is always inserted into the mounting hole 303.

[0029] By using an electric telescopic rod to support the crossbeam 304, the control module 103 can control the distance between the two supporting longitudinal beams 305 by controlling the extension of the crossbeam 304, ensuring that the detection areas of the laser probes 106 on the two supporting longitudinal beams 305 are complementary, resulting in higher detection density and more thorough road surface detection.

[0030] Please see Figure 3 , Figure 4 and Figure 5The bearing longitudinal beam 305 has a T-shaped channel 306 inside. The top of the T-shaped channel 306 is open and located on the top surface of the bearing longitudinal beam 305. Both ends of the T-shaped channel 306 are inserted with end caps 307. The end caps 307 are connected to the bearing longitudinal beam 305 by bolts. The two end caps 307 at the same end of the two bearing longitudinal beams 305 are respectively fixedly connected to the two ends of the corresponding supporting crossbeams 304. Two inner plates 308 are movably inserted inside a single T-shaped channel 306. A vertical plate 309 is fixedly connected to the top surface of the inner plate 308. The top of the vertical plate 309 passes through the opening of the T-shaped channel 306 and is fixedly connected to an outer plate 310. A top shaft 311 is fixedly connected to the middle position of the top surface of the outer plate 310. The synchronization mechanism 4 is installed outside the top shaft 311. The top surface of the inner plate 308 has a receiving groove 312. Rollers 313 are installed inside the receiving groove 312.

[0031] Roller 313 reduces wear by replacing sliding friction with rolling friction.

[0032] The sliding arrangement of the inner plate 308 and the vertical plate 309 within the T-shaped channel 306 provides a mounting base for the opening and closing movement of the synchronization mechanism 4.

[0033] Please see Figure 3 The synchronization mechanism 4 includes a positioning shaft 401. The top end of the positioning shaft 401 is fixedly connected to the middle of the bottom surface of the mounting longitudinal beam 301. An upper strip 402 and a lower strip 403 are movably sleeved on the outside of the positioning shaft 401. The bottom surface of the upper strip 402 is in contact with the top surface of the lower strip 403. The upper strip 402 and the lower strip 403 are staggered to form an X-shaped structure. Insertion holes 404 are opened at the ends of the upper strip 402 and the lower strip 403. The four top shafts 311 are movably inserted into the four insertion holes 404 respectively.

[0034] The two load-bearing longitudinal beams 305 are simultaneously moved closer to or away from the positioning shaft 401 by the scissor-like opening and closing motion between the upper strip 402 and the lower strip 403.

[0035] Please see Figure 6 and Figure 7 The fixed structure 5 includes two wall panels 501, which are located on both sides of the laser probe 106. The top of the wall panel 501 is fixedly connected to the bottom surface of the bearing longitudinal beam 305. Both wall panels 501 have through holes at their bottom ends, and the same flip shaft 502 is movably inserted into the two through holes. The flip shaft 502 is fixedly installed through the top of the laser probe 106.

[0036] The laser probe 106 can be flipped by the movable connection between the flipping shaft 502 and the perforation.

[0037] Please see Figure 3 , Figure 8 , Figure 9 and Figure 10 The reciprocating mechanism 6 includes a power box 601, the middle of the top surface of which is fixedly connected to the bottom end of the positioning shaft 401. A data acquisition device 602 is bolted to the side of the positioning shaft 401. The data acquisition device 602 is electrically connected to the laser probe 106 and the control module 103. Fixing holes 603 are provided on both sides of the power box 601 located on both sides of the data acquisition device 602. A drive motor 604 is bolted to the top surface of the inner cavity of the power box 601. Electrically connected to the control module 103, a drive bevel gear 605 is fixedly sleeved on the output shaft of the drive motor 604. A transmission shaft 606 is installed inside the two fixing holes 603 through bearings. A driven bevel gear 607 is fixedly sleeved on one end of the transmission shaft 606 inside the power box 601. Both driven bevel gears 607 mesh with the drive bevel gear 605. The bottom of the power box 601 is open, and a bottom cover 608 is sleeved on the bottom of the power box 601. The bottom cover 608 is bolted to the power box 601.

[0038] The drive shaft 606 is hollow, and two strip-shaped grooves are symmetrically opened on the inner wall of the drive shaft 606. An inner rod 609 is inserted into the drive shaft 606, and two wing strips are symmetrically installed on the surface of the inner rod 609. The wing strips are inserted into the strip-shaped grooves. The end of the inner rod 609 away from the drive shaft 606 is fixedly connected to the end of the flip shaft 502 away from the flip strip 704, which is used to adapt to the change of distance between the two load-bearing longitudinal beams 305.

[0039] By driving the bevel gear 605 to simultaneously drive the two driven bevel gears 607 to rotate, the two driven bevel gears 607 rotate in opposite directions, thereby causing the laser probes 106 on the two supporting longitudinal beams 305 to flip in opposite directions.

[0040] The control module 103 controls the flipping direction of the laser probe 106 by controlling the forward and reverse operation of the drive motor 604, and controls the flipping angle of the laser probe 106 by controlling the rotation angle of the output shaft.

[0041] Please see Figure 3 , Figure 4 , Figure 6 and Figure 7 Multiple laser probes 106 are installed at equal intervals on the bottom surface of the supporting longitudinal beam 305 through multiple fixed structures 5. The installation distance is limited by the coverage range of a single laser probe 106. The coverage range of two adjacent laser probes 106 always partially overlaps. The detection range of all laser probes 106 on the same supporting longitudinal beam 305 is continuous, reducing the area of ​​the missed detection area, thereby increasing the coverage area of ​​the laser measurement equipment, reducing the frequency of lane change detection, saving more time and effort, and improving detection efficiency.

[0042] Only the flipping shaft 502 corresponding to the fixed structure 5 in the middle of the bearing longitudinal beam 305 is connected to the inner rod 609, and the laser probes 106 on the two bearing longitudinal beams 305 are tilted in opposite directions, so that the laser probes 106 can detect the extra-wide part.

[0043] The linkage mechanism 7 is installed between all the fixed structures 5 on the same bearing longitudinal beam 305. The linkage mechanism 7 includes an outer sleeve 701, which is fixedly connected to the side of the bearing longitudinal beam 305 away from the positioning shaft 401. Two outer sleeves 701 are installed on one bearing longitudinal beam 305. The two outer sleeves 701 are located at both ends of the bearing longitudinal beam 305 respectively. A linkage bar 702 is movably inserted inside the bearing longitudinal beam 305. A linkage wheel 703 is fixedly connected to the side of the linkage bar 702 facing the wall panel 501. A flipping long bar 704 is fixedly installed at the end of the flipping shaft 502 away from the inner rod 609. A displacement sliding hole 705 is opened on the flipping long bar 704, and the linkage wheel 703 is inserted into the displacement sliding hole 705.

[0044] Through the cooperation of the linkage bar 702, linkage wheel 703, displacement sliding hole 705, flipping strip 704, and flipping shaft 502, all laser probes 106 on the same bearing longitudinal beam 305 are flipped synchronously, ensuring that the flipping angle and direction of the laser probes 106 on the same bearing longitudinal beam 305 are consistent.

[0045] A movable pin 706 is fixedly installed at the end of the flipped strip 704 away from the laser probe 106. The movable pin 706 is connected to a fixed pin 708 by a gravity spring 707. The fixed pin 708 is threadedly installed on the surface of the load-bearing longitudinal beam 305.

[0046] The gravity spring 707 applies a preload to the flipping strip 704 via the movable pin 706, using the fixed pin 708 as a base point. This ensures that the linkage wheel 703 is always in contact with one side wall of the inner cavity of the displacement sliding hole 705. This side wall is the side wall of the inner cavity of the displacement sliding hole 705 away from the gravity spring 707, ensuring that the linkage wheel 703 rolls stably on this side wall. This prevents the flipping strip 704 from wobbling in the flipping direction, increasing the stability of the laser probe 106. The more stable operation of the laser probe 106 increases the detection accuracy. Please see Figure 3 An angle sensor 8 is bolted onto the flipping strip 704 corresponding to the fixed structure 5 at the middle position of the bearing longitudinal beam 305.

[0047] The control module 103 detects the tilt angle of the flipped strip 704 in real time through the tilt sensor 8, and then detects the tilt angle of the laser probe 106 in real time, providing necessary data for calculating road surface parameters.

[0048] Working principle First, the terminal inputs the road width information to the control module 103 via antenna 105. Then, the vehicle body 101 is positioned in the middle of the road. The vehicle body 101 then travels normally on the road. The control module 103 detects the vehicle body 101's speed using a speed sensor. Next, the control module 103 controls the extension of the support beam 304 to match the speed of the vehicle body 101, thus adapting the laser probes 106 on the two longitudinal beams 305 to the speed of the vehicle body 101. Then, the control module 103 sets the reversing speed of the drive motor 604's output shaft based on the vehicle body 101's speed. The control module 103 then controls the drive motor 604's output shaft to reciprocate in both directions. The drive motor 604 then drives two transmissions through the meshing of the drive bevel gear 605 and the two driven bevel gears 607. The drive shaft 606 rotates back and forth in both directions. Then, the drive shaft 606, through the cooperation of the strip groove and the wing strip, the inner rod 609, and the flipping shaft 502, drives the laser probe 106 to flip back and forth. Due to the restriction of the rotation direction of the two driven bevel gears 607, the flipping direction of the laser probes 106 on the two supporting longitudinal beams 305 is always opposite and synchronous. Then, the laser probes 106 on the two supporting longitudinal beams 305 detect the road surface. Then, the laser probes 106 send the detection information to the control module 103 through the data acquisition device 602. Then, the control module 103 detects the tilt angle of the laser probes 106 in real time through the tilt sensor 8. Then, the control module 103 collects the tilt angle data of the laser probes 106 and the detection data of the laser probes 106, and then calculates the geometric parameters such as road surface smoothness and rut depth, and stores or transmits them to the terminal device in real time.

[0049] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary; within the framework of this invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.

[0050] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A laser measurement device for highway pavement, comprising: The measuring vehicle (1) is characterized in that a fixed base (2) is installed at the bottom of the measuring vehicle (1), a mounting bracket (3) is installed at the bottom of the fixed base (2), a synchronization mechanism (4) is installed in the middle of the mounting bracket (3), a fixed structure (5) is installed at the bottom of the mounting bracket (3), a laser probe (106) is installed at the bottom of the fixed structure (5), and a reciprocating mechanism (6) and a linkage mechanism (7) are installed on the side of the fixed structure (5). The measuring vehicle (1) includes a vehicle body (101), a battery (102) and a control module (103) are installed inside the vehicle body (101), a cover plate (104) is installed on the top surface of the vehicle body (101), and an antenna (105) is installed on the top surface of the cover plate (104).

2. The laser measurement device for highway pavement according to claim 1, characterized in that, The fixed base (2) includes a concave hole (201), which is opened on the bottom surface of the vehicle body (101). Two fixed crossbeams (202) are fixedly connected between the left and right sides of the inner cavity of the concave hole (201). The mounting bracket (3) is bolted to the bottom surface of the fixed crossbeams (202).

3. The laser measurement device for highway pavement according to claim 2, characterized in that, The mounting bracket (3) includes a mounting longitudinal beam (301), which is bolted to the bottom surface of two fixed crossbeams (202). Both ends of the bottom surface of the mounting longitudinal beam (301) are fixedly connected to mounting blocks (302). The mounting blocks (302) have mounting holes (303) inside. Supporting crossbeams (304) are installed inside the mounting holes (303). The two ends of the two supporting crossbeams (304) located on the same side of the mounting longitudinal beam (301) are fixedly connected to the same bearing longitudinal beam (305). The fixing structure (5) is installed on the bottom surface of the bearing longitudinal beam (305).

4. The laser measurement device for highway pavement according to claim 3, characterized in that, The supporting beam (304) uses an electric telescopic rod, the outer sleeve of which is movably inserted into the mounting hole (303).

5. The laser measurement device for highway pavement according to claim 3, characterized in that, The bearing longitudinal beam (305) has a T-shaped channel (306) inside. Both ends of the T-shaped channel (306) are inserted with end caps (307). The two end caps (307) at the same end of the two bearing longitudinal beams (305) are fixedly connected to the two ends of the corresponding supporting crossbeams (304). Two inner plates (308) are movably inserted inside a single T-shaped channel (306). A vertical plate (309) is fixedly connected to the top surface of the inner plate (308). The top of the vertical plate (309) passes through the opening of the T-shaped channel (306) and is fixedly connected to an outer plate (310). A top shaft (311) is fixedly connected to the middle position of the top surface of the outer plate (310). A synchronization mechanism (4) is installed outside the top shaft (311). A receiving groove (312) is opened on the top surface of the inner plate (308). A roller (313) is installed inside the receiving groove (312).

6. The laser measurement device for highway pavement according to claim 3, characterized in that, The synchronization mechanism (4) includes a positioning shaft (401). The top end of the positioning shaft (401) is fixedly connected to the middle of the bottom surface of the mounting longitudinal beam (301). An upper strip (402) and a lower strip (403) are movably sleeved on the outside of the positioning shaft (401). The bottom surface of the upper strip (402) is in contact with the top surface of the lower strip (403). The upper strip (402) and the lower strip (403) are staggered to form an X-shaped structure. Insertion holes (404) are provided at the ends of the upper strip (402) and the lower strip (403). Four top shafts (311) are movably inserted into the four insertion holes (404).

7. The laser measurement device for highway pavement according to claim 3, characterized in that, The fixed structure (5) includes two wall panels (501), which are located on both sides of the laser probe (106). The top of the wall panel (501) is fixedly connected to the bottom surface of the supporting longitudinal beam (305). Both wall panels (501) have through holes at their bottom ends. The same flip shaft (502) is movably inserted into the two through holes. The flip shaft (502) is fixedly installed on the top of the laser probe (106).

8. The laser measurement device for highway pavement according to claim 6, characterized in that, The reciprocating mechanism (6) includes a power box (601), the top surface of which is fixedly connected to the bottom end of the positioning shaft (401). A data acquisition device (602) is bolted to the side of the positioning shaft (401). Fixing holes (603) are provided on both sides of the power box (601) on both sides of the data acquisition device (602). A drive motor (604) is bolted to the top surface of the inner cavity of the power box (601). A drive bevel gear (605) is fixedly sleeved on the output shaft of the drive motor (604). A transmission shaft (606) is installed inside the two fixing holes (603) through bearings. One end of the transmission shaft (606) located inside the power box (601) is fixedly mounted. A driven bevel gear (607) is fixedly connected to the drive bevel gear (605). The bottom of the power box (601) is open, and a bottom cover (608) is fitted on the bottom of the power box (601). The bottom cover (608) is bolted to the power box (601). The transmission shaft (606) is hollow. Two strip grooves are symmetrically opened on the inner wall of the transmission shaft (606). An inner rod (609) is inserted into the transmission shaft (606). Two wing strips are symmetrically installed on the surface of the inner rod (609). The wing strips are inserted into the strip grooves. The end of the inner rod (609) away from the transmission shaft (606) is fixedly connected to the end of the flip shaft (502).

9. A laser measuring device for highway pavement according to claim 3, characterized in that, Multiple laser probes (106) are mounted on the bottom surface of the bearing longitudinal beam (305) through multiple fixed structures (5). Only the flip shaft (502) corresponding to the fixed structure (5) in the middle of the bearing longitudinal beam (305) is connected to the inner rod (609). The laser probes (106) on the two bearing longitudinal beams (305) are tilted in opposite directions. The linkage mechanism (7) is installed between all the fixed structures (5) on the same bearing longitudinal beam (305). The linkage mechanism (7) includes an outer tube (701), which is fixedly connected to the side of the bearing longitudinal beam (305) away from the positioning shaft (401). The bearing longitudinal beam (305) is movably inserted with a linkage mechanism. The moving bar (702) and the linkage bar (702) are fixedly connected to the side of the wall panel (501) with a linkage wheel (703). The end of the flipping shaft (502) away from the inner rod (609) is fixedly installed with a flipping bar (704). The flipping bar (704) has a displacement sliding hole (705). The linkage wheel (703) is inserted into the displacement sliding hole (705). The surface of the flipping bar (704) away from the laser probe (106) is fixedly installed with a movable nail (706) at its end. The movable nail (706) is connected to a fixed nail (708) through a gravity spring (707). The fixed nail (708) is threadedly installed on the surface of the bearing longitudinal beam (305).

10. A laser measurement device for highway pavement according to claim 9, characterized in that, An angle sensor (8) is bolted onto the flipping strip (704) corresponding to the fixing structure (5) at the middle position of the bearing longitudinal beam (305).

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