A laser track tester for highway pavement detection

Abstract

The application relates to a laser track tester for highway pavement detection and belongs to the technical field of pavement detection. The laser track tester comprises a vehicle body and a laser track tester, further comprises a suspension mechanism, the suspension mechanism comprises a fixing support fixed to a vehicle head girder of the vehicle body, a connecting support which is arranged on one side of the fixing support in a liftable mode and fixes the laser track tester, a connecting rod I which is rotationally connected to the fixing support and the connecting support at two ends respectively, a positioning assembly for limiting the connecting rod I, a driving support which is slidably arranged in the fixing support, a probe wheel which is rotationally connected to the bottom end of the driving support and abuts against the ground, and a tension spring which is hung to the fixing support and the connecting support at two ends respectively. When the probe wheel passes through a pit, the driving support is driven to slide, the positioning assembly is triggered to release the limitation on the connecting rod I, the connecting support is pulled up by the tension spring to lift the laser track tester away from the ground, collision and damage of the equipment with the edge of the pit are avoided, and the service life of the equipment is effectively prolonged.

Description

Technical Field

[0001] This invention belongs to the field of road surface detection technology and relates to a laser rutting instrument for highway road surface detection. Background Technology

[0002] Road rutting is a significant factor affecting road safety and service life. As a precise road surface detection device, laser rutting meters are widely used in road maintenance and inspection. Their core function is to accurately detect parameters such as rutting depth and width by emitting and receiving laser signals, providing data support for road maintenance.

[0003] Currently, existing laser rut detectors for highway pavement inspection still have many shortcomings in actual use, making it difficult to meet the needs for efficient, accurate, and stable inspection.

[0004] Most existing laser rutting detectors are directly fixed on the inspection vehicle, lacking effective buffer and emergency protection mechanisms. When the inspection vehicle travels to a potholed section of road, the laser rutting detector is prone to collision with the edge of the pothole, resulting in equipment damage. In particular, the laser detection lens at the bottom is damaged, which will directly affect the detection accuracy and may even cause the equipment to malfunction.

[0005] Direct sunlight on the detection area will cause reflections, interfering with the transmission and reception of laser signals, resulting in deviations in the detection data and failing to provide accurate and reliable data support for highway maintenance. If an integral fixed sunshade is used, due to its extremely low ground clearance, it is very easy to scrape the bottom and break when the road conditions are poor, resulting in damage to the sunshade and possibly damaging the laser detection lens as well. Summary of the Invention

[0006] This invention addresses the problems of existing laser rutting meters for highway pavement inspection, which are directly fixed to the inspection vehicle. These rutting meters are prone to collisions and damage on uneven road surfaces, and are also susceptible to interference from light reflections, flying stones, and dust accumulation on the lens, leading to insufficient detection accuracy and short equipment lifespan. Based on existing vehicle-mounted laser rutting meters, this invention proposes an emergency protective suspension design. By optimizing the installation and fixing structure of the laser rutting meter, a trigger unlocking mechanism consisting of the probe wheel, drive bracket, and positioning components is organically combined with a parallel four-bar lifting mechanism consisting of a fixed bracket, connecting rod I, connecting bracket, and tension spring. This allows for simultaneous emergency actions—positioning and unlocking, and equipment lifting—when the probe wheel detects a pothole, providing a laser rutting meter for highway pavement inspection.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a laser rut detector for highway pavement detection, comprising a vehicle body and a laser rut detector mounted on the front of the vehicle body, and further comprising a suspension mechanism, wherein the suspension mechanism includes: A fixed bracket is attached to the front beam of the vehicle body. A connecting bracket is liftably mounted on one side of the fixed bracket, and the connecting bracket is fixed to one side of the laser rutting instrument; Two connecting rods I, each of which is rotatably connected at both ends to the outside of the fixed bracket and the connecting bracket, respectively; A positioning component, disposed on the fixed bracket, is used to limit the linkage I to fix the detection position of the laser rutting instrument; A drive bracket is slidably mounted on the top of the fixed bracket, and one end of the drive bracket is engaged with the positioning component. The probe wheel is rotatably connected to the bottom end of the drive bracket, and the probe wheel is in contact with the ground. A tension spring, with its two ends respectively attached to the fixed bracket and the connecting bracket; When the probe wheel passes over a pothole, it causes the drive bracket to slide relative to the fixed bracket, triggering the positioning component to release the limit on the connecting rod I. The tension spring pulls the connecting bracket upward to lift the laser rutting instrument away from the ground.

[0008] As a further improvement to the above technical solution: The positioning assembly includes an eccentric wheel, two fixed plates, two pins, two connecting rods II, and two lifting plates; The eccentric wheel is fixedly sleeved on the rotating shaft I inside the fixed bracket, and both ends of the eccentric wheel are provided with insertion holes; The two fixing plates are fixed to the top of the fixing bracket; The two pins are respectively slidably inserted through the two fixing plates; The two lifting plates are respectively slidably inserted through the top of the fixed bracket and connected to the drive bracket; Both ends of each of the connecting rods II are rotatably connected to the corresponding pin and the lifting plate, respectively; When one end of the pin is inserted into the socket, it restricts the rotation of the eccentric wheel; When the drive bracket drives the lifting plate to slide, the connecting rod II pulls the pin away from the insertion hole to release the limit.

[0009] The pin is provided with a limiting seat at one end near the eccentric wheel. The diameter of the limiting seat is adapted to the insertion hole. When the limiting seat is inserted into the insertion hole, it restricts the rotation of the eccentric wheel.

[0010] Limiting blocks are fixedly connected to both sides of the fixed bracket and the connecting bracket. The limiting blocks are used to limit the rotation angle of the connecting rod I to ensure that the connecting bracket can be raised and lowered smoothly.

[0011] The top of the fixed bracket and the connecting bracket are respectively fixedly connected with hanging pins, and the two ends of the tension spring are respectively hung on the corresponding hanging pins.

[0012] It also includes a light-shielding and protection mechanism, which comprises a fixed frame and two sets of baffles; The fixed frame is fixedly sleeved on the outer wall of the laser rutting instrument; The two sets of baffles are rotatably connected to the bottom of the fixed frame and are staggered to block external light and prevent reflection in the bottom detection area of ​​the laser rutting instrument.

[0013] Two sets of rotating seats I are fixedly connected to the bottom of the fixed frame. Each baffle is hinged to the corresponding rotating seat I through a rotating shaft II, so that the baffle can rotate relative to the fixed frame to adjust the shading angle.

[0014] It also includes a protective mechanism, which comprises multiple rotating seats II, multiple stop bars, multiple damping rods, and a connecting shaft; Multiple rotating seats II are fixed to the bottom of one side of the laser rutting instrument; One end of each of the stop bars is rotatably connected to the corresponding rotating seat II, and the other end is rotatably connected to the corresponding damping rod; The connecting shaft is fixed to the other side of the laser rutting instrument, and the other ends of the plurality of damping rods are rotatably sleeved on the connecting shaft; The baffle bar is used to block flying stones from hitting the laser rutting instrument, and the damping rod is used to buffer the impact force on the baffle bar and drive it to reset.

[0015] The bottom of the baffle is provided with a slope, and an optical path gap is formed between two adjacent baffles; The inclined plane is used to change the trajectory of the flying stone, and the optical path gap is used for laser signal transmission.

[0016] It also includes a cleaning component, which includes a flow guide frame and a mounting base; The flow guide frame is fixed to one side of the laser rutting instrument and is used to guide the airflow of the vehicle into it; The mounting base is fixed to the top of the flow guide frame and the fixed frame, and an L-shaped channel is provided on the top of the mounting base; The L-shaped channel is connected at one end to the flow guide frame and at the other end to the surface of the glass lens at the bottom of the laser rutting instrument, so as to guide the airflow to blow towards the glass lens to remove surface debris.

[0017] The probe wheel senses road potholes in real time, triggers the positioning component to unlock simultaneously, and works with the parallel four-bar linkage and tension spring to achieve emergency automatic lifting of the laser rut gauge; Two sets of rotatable offset baffles adapt to different light angles, avoid glare in the detection area, and solve the problem of the fixed light shield being easily scratched and broken. Multiple sets of beveled baffles, combined with damping rods, not only do not affect the transmission of laser signals, but also block the impact of flying stones and buffer and absorb energy. The laser lens is automatically cleaned by utilizing the airflow from the vehicle's movement through a guide frame and an L-shaped channel.

[0018] The beneficial effects of this invention are as follows: 1. The laser rutting detector for highway pavement detection disclosed in this invention, through the setting of a suspension mechanism, uses a probe wheel to sense the road surface flatness in real time, and with the cooperation of positioning components and tension springs, realizes the automatic emergency lifting and lowering of the laser rutting detector. When the depth of the pothole exceeds the preset value, the limit can be quickly released and the laser rutting detector can be moved away from the ground to avoid collision damage between the equipment and the edge of the pothole. At the same time, the limit block restricts the rotation angle of the connecting rod I, ensuring the stable operation of the suspension mechanism and effectively extending the service life of the equipment. The fixed bracket and the connecting bracket form a parallel four-bar structure through the rotating shaft I and the connecting rod I, ensuring that the laser rutting detector always remains horizontal during the lifting and lowering process, avoiding detection angle deviation, and further ensuring detection accuracy. The precise cooperation between the limit seat and the socket in the positioning component realizes the smooth switching between limiting and unlocking of the laser rutting detector. 2. The laser rutting detector for highway pavement detection disclosed in this invention has a light-shielding protection mechanism fixed to the outer wall of the laser rutting detector by a fixed frame. Two sets of staggered baffles can be freely adjusted according to the angle of light, which can completely block external light, avoid reflection from direct sunlight on the detection area, reduce interference in the laser signal transmission process, ensure the stability of the laser signal received and emitted by the bottom glass lens of the laser rutting detector, significantly improve the accuracy of pavement rutting detection data, solve the problem of large detection errors caused by light interference in existing equipment, and at the same time avoid external gravel hitting the lens; 3. The laser rutting detector for highway pavement detection disclosed in this invention has multiple baffles mounted on the bottom of the laser rutting detector via a rotating base II. The optical path gap between adjacent baffles does not affect the normal transmission of the laser signal, and the baffles can block high-speed flying stones, debris and other objects from impacting the equipment. The inclined surface at the bottom of the baffle can change the trajectory of the flying stones, preventing them from rebounding and damaging the equipment. The damping rod can buffer the impact force on the baffle, prevent the baffle from being damaged and drive it to reset, further improving the protection effect and extending the service life of the laser rutting detector. 4. The laser rutting detector for highway pavement detection disclosed in this invention guides airflow into an L-shaped channel through a guide frame. After being guided, the airflow blows onto the glass lens at the bottom of the laser rutting detector, which can automatically remove dust and small debris from the surface of the lens, preventing debris from blocking the laser signal. No additional power device is required, and the lens can be automatically cleaned. This not only ensures detection accuracy but also reduces the workload of manual cleaning and lowers equipment maintenance costs.

[0019] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0020] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a three-dimensional structural schematic diagram of a laser rut detector for highway pavement detection according to the present invention. Figure 2 This is a schematic diagram of the suspension mechanism and the connection structure of a laser rutting instrument for highway pavement detection according to the present invention. Figure 3 This is a side view of the suspension mechanism of a laser rut detector for highway pavement detection according to the present invention. Figure 4 for Figure 2 Enlarged structural diagram of section A in the middle; Figure 5 This is a schematic cross-sectional view of the eccentric wheel structure of a laser rut detector for highway pavement detection according to the present invention. Figure 6 This is a schematic diagram of the installation structure of the protective mechanism of a laser rut detector for highway pavement detection according to the present invention. Figure 7 This is a schematic diagram of the protective mechanism structure of a laser rut detector for highway pavement detection according to the present invention. Figure 8 This is a cross-sectional structural schematic diagram of the cleaning component of a laser rut detector for highway pavement detection according to the present invention. Figure 9 This is a schematic diagram of the baffle installation structure of a laser rut detector for highway pavement detection according to the present invention.

[0021] Reference numerals: 1. Vehicle body; 2. Suspension mechanism; 21. Fixed bracket; 22. Connecting bracket; 23. Linkage I; 24. Rotating shaft I; 25. Tension spring; 26. Positioning assembly; 261. Fixed plate; 262. Lifting plate; 263. Pin; 264. Linkage II; 265. Eccentric wheel; 266. Limiting seat; 267. Insertion hole; 27. Drive bracket; 28. Probe wheel; 29. ​​Limiting block; 210. Sliding column; 211. Hanging pin; 3. Laser rutting instrument; 4. Light-shielding protection mechanism; 41. Fixed frame; 42. Baffle; 43. Rotating seat I; 44. Rotating shaft II; 5. Protection mechanism; 51. Rotating seat II; 52. Stop bar; 53. Damping rod; 54. Connecting shaft; 55. Optical path gap; 56. Inclined surface; 6. Cleaning assembly; 61. Guide frame; 62. Mounting seat; 63. L-shaped channel. Detailed Implementation

[0022] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0023] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0024] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0025] Example 1

[0026] like Figures 1-9As shown, a laser rutting detector for highway pavement detection includes a vehicle body 1 and a laser rutting detector 3. A suspension mechanism 2 is provided between the vehicle body 1 and the laser rutting detector 3. The suspension mechanism 2 can connect and fix the laser rutting detector 3 and perform emergency lifting and lowering to prevent impact damage to the laser rutting detector 3 caused by road potholes. It includes a fixed bracket 21 and a connecting bracket 22. The fixed bracket 21 is made of rigid plate and is fixed to the front beam of the vehicle body 1 with high-strength bolts. The connecting bracket 22 is fixed to the outer shell on one side of the laser rutting detector 3 with high-strength bolts. Both the fixed bracket 21 and the connecting bracket 22 have two rotating shafts I24 mounted on them via bearings. The bearings ensure that the rotating shafts I24 can rotate flexibly and reduce wear during rotation. The sealed bearings prevent dust from entering the bearings and affecting rotation. The two rotating shafts I24 are respectively fixedly connected to the same connecting rod I23 at both ends. The connecting rod I23 is a rigid rod and its function is to connect the fixed bracket 21 and the connecting bracket 22 to form a parallel four-bar structure. This ensures that the connecting bracket 22 remains horizontal during the lifting and lowering process, avoids the laser rutting instrument 3 from tilting, and ensures the stability of the detection angle. Both the top of the connecting bracket 22 and the fixed bracket 21 are fixedly provided with hanging pins 211. The hanging pins 211 are cylindrical structures used to hang the tension springs 25. The two ends of the tension springs 25 are respectively hung on the corresponding hanging pins 211. In the initial state, the tension springs 25 are in a pre-stretched state and store a certain amount of elastic potential energy. When the positioning component 26 releases the limit on the laser rutting device 3, the tension springs 25 release the elastic potential energy and generate an upward pulling force, which pulls the connecting bracket 22 upward and drives the laser rutting device 3 away from the ground, avoiding collision between the laser rutting device 3 and the edge of the road potholes, thus achieving emergency avoidance. Limiting blocks 29 are fixedly installed on both sides of the fixed bracket 21 and the connecting bracket 22. The limiting blocks 29 are rigid block structures, and their positions correspond to the connecting rod I 23. When the connecting rod I 23 rotates, the limiting blocks 29 can prevent the connecting rod I 23 from rotating excessively, so as to avoid damage to the suspension mechanism 2 due to excessive rotation angle of the connecting rod I 23. At the same time, they can limit the lifting stroke of the connecting bracket 22 to prevent the laser rutting instrument 3 from being raised too high or lowered too low, so as to ensure stable operation of the equipment.

[0027] A positioning component 26 is installed on the fixed bracket 21. The core function of the positioning component 26 is to limit the rotation of the connecting rod I 23. By restricting the rotation of the connecting rod I 23, the laser rutting instrument 3 is fixed and positioned, ensuring that the laser rutting instrument 3 maintains a fixed height during normal detection and ensuring detection accuracy. A drive bracket 27 is also movably installed on the fixed bracket 21. The drive bracket 27 is a rigid frame structure. One end of the drive bracket 27 cooperates with the positioning component 26 and can trigger the positioning component 26 to unlock through its own movement. A probe wheel 28 is rotatably installed at the bottom of the drive bracket 27 through a waterproof sealed bearing. The waterproof sealed bearing can effectively prevent road dust, mud, and rainwater from entering the bearing. At the same time, a dustproof cover is fitted on the outer ring of the bearing to further enhance the dustproof effect. The bearing is filled with high-temperature resistant grease, which can adapt to outdoor temperature changes and ensure that the probe wheel 28 can rotate flexibly, reducing the friction between the probe wheel 28 and the ground and extending the service life of the bearing and the probe wheel 28. The probe wheel 28 always maintains contact with the ground during operation and can roll synchronously with the vehicle body 1 to sense the flatness of the road surface in real time. When potholes appear on the road surface, the probe wheel 28 will move upward or downward depending on the depth of the pothole. When the depth of the pothole exceeds the preset value, the upward pushing force from the ground or the downward movement of the probe wheel 28 will drive the drive bracket 27 to move upward or downward, thereby triggering the positioning component 26 to release the limit on the laser rutting instrument 3 and realize emergency avoidance.

[0028] The positioning assembly 26 includes an eccentric wheel 265, a fixed plate 261, a pin 263, a lifting plate 262, a connecting rod II 264, a limiting seat 266, and a socket 267. The eccentric wheel 265 is fixedly sleeved on one of the rotating shafts I 24 inside the fixed bracket 21 and rotates synchronously with the rotating shaft I 24. Two fixed plates 261 are fixedly installed on the top of the fixed bracket 21. The two fixed plates 261 are symmetrically arranged on both sides of the eccentric wheel 265, which serve to fix and guide the pin 263. A sliding hole is opened through the fixed plate 261. The pin 263 passes through the sliding hole and slides with the fixed plate 261, and can slide freely along the sliding hole to move closer to or away from the eccentric wheel 265. Both ends of the eccentric wheel 265 have insertion holes 267. A limiting seat 266 is integrally formed at the end of the pin 263 near the eccentric wheel 265. The diameter of the limiting seat 266 matches the insertion hole 267, allowing for precise insertion. When the limiting seat 266 is inserted into the insertion hole 267, it restricts the rotation of the eccentric wheel 265, thereby restricting the rotation of the rotating shaft I 24 and the connecting rod I 23, ultimately achieving the limiting and fixing of the laser rutting instrument 3. Simultaneously, it ensures that the pin 263 will not detach from the fixing plate 261. When the limiting seat 266... When 66 disengages from the insertion hole 267, the eccentric wheel 265 is released from its limit and can rotate freely with the rotating shaft I 24, thereby releasing the connecting rod I 23, allowing the connecting bracket 22 to rise and fall freely. There are two lifting plates 262, located on the outside of the fixed plate 261 respectively, both of which slide through the fixed bracket 21. The lifting plates 262 and the corresponding pins 263 are rotatably connected to the same connecting rod II 264 through the pin shaft, so that the lifting plates 262 can pull the pins 263 outward through the connecting rod II 264 during the rising / falling process.

[0029] Two guide holes are provided through the top of the fixed bracket 21. The sliding column 210 passes through the guide holes and slides with the fixed bracket 21. The function of the guide holes is to guide the sliding column 210 and prevent it from deviating. A dustproof sealing ring is fitted at the interface between the guide hole and the sliding column 210 to prevent road dust from entering the gap. The bottom end of the sliding column 210 is fixedly connected to the corresponding lifting plate 262 by welding to ensure the connection strength and withstand the force transmitted by the drive bracket 27. The top end of the sliding column 210 is fixedly connected to the drive bracket 27 by high-strength bolts. The bolt connection facilitates the disassembly, inspection and maintenance of the equipment, while ensuring the stability of the connection, so that the drive bracket 27, the sliding column 210 and the lifting plate 262 can move synchronously. When the probe wheel 28 is pushed upward by the ground or falls to the bottom of the pit under its own weight, it will drive the drive bracket 27 to move upward / downward. The drive bracket 27 will drive the sliding column 210 to slide upward / downward in sync. The sliding column 210 will drive the lifting plate 262 to move upward / downward. The upward displacement of the lifting plate 262 will be transmitted to the pin 263 through the connecting rod II 264, pulling the pin 263 to slide away from the eccentric wheel 265, so that the limit seat 266 disengages from the insertion hole 267, releasing the limit on the eccentric wheel 265. At this time, the tension spring 25 releases its elastic potential energy, pulling the connecting bracket 22 to move upward, driving the laser rutting instrument 3 to rise, thus achieving hazard avoidance.

[0030] The laser rutting instrument 3 is equipped with a light-shielding protection mechanism 4, the core function of which is to block external light, especially sunlight, to prevent direct light from shining on the detection area and causing reflections that could interfere with the transmission and reception of the laser signal, thereby ensuring detection accuracy. The light-shielding protection mechanism 4 includes a fixed frame 41, a rotating seat I 43, a baffle 42, and a rotating shaft II 44. The fixed frame 41 is made of rigid material and is fixed to the outer wall of the laser rutting instrument 3 by bolts, fitting tightly against the outer shell of the laser rutting instrument 3. It serves to fix and support the rotating seat I 43, and at the same time, it can provide a certain degree of protection for the outer wall of the laser rutting instrument 3. Two sets of rotating seats I 43 are fixedly installed at the bottom of the fixed frame 41. The two sets of rotating seats I 43 are staggered. The baffle 42 is hinged to the corresponding rotating seat I 43 through the rotating shaft II 44. The rotating shaft II 44, the rotating seat I 43 and the baffle 42 are all rotated and engaged by sealed bearings, so that the baffle 42 can rotate freely around the rotating shaft II 44. The sealed bearings can effectively isolate road dust and ensure that the baffle 42 rotates flexibly. It can not only block light, but also prevent small external particles from colliding with the glass lens at the bottom of the laser rutting instrument 3. The baffle 42 is made of light-blocking material, which can effectively block light penetration. The two sets of baffles 42 are staggered to form an interlaced light-blocking structure, which can block direct light from different angles, prevent light from directly hitting the glass lens at the bottom of the laser rutting instrument 3, reduce the reflection interference in the detection area, ensure the stable transmission of laser signal and improve the accuracy of detection data.

[0031] Example 2

[0032] Reference Figures 1-9 This invention provides a new technical solution: a laser rutting detector for highway pavement detection, which also includes a protective mechanism 5. Its core function is to protect the detection parts of the laser rutting detector 3, especially the bottom glass lens, from damage caused by high-speed flying stones, debris, etc., while ensuring the normal transmission of the laser signal. The protective mechanism 5 includes a rotating base II 51, a stop bar 52, a damping rod 53, and a connecting shaft 54. The rotating base II 51 is a rigid support structure, and there are multiple units evenly fixed to the bottom of one side of the laser rutting detector 3. It is used to install the stop bar 52. One end of the stop bar 52 is rotatably mounted on the bottom of the rotating base II 51 via a bearing, allowing the stop bar 52 to rotate freely around the rotating base II 51. The stop bar 52 is a rigid rod that can prevent high-speed flying stones and other debris from impacting the laser rutting detector 3. The other end of the stop bar 52 is rotatably connected to one end of the damping rod 53 via a bearing. A connecting shaft 54 ​​is fixedly installed on the other side of the laser rutting instrument 3. The connecting shaft 54 ​​is a cylindrical rigid structure. The other ends of multiple damping rods 53 are rotatably sleeved on the connecting shaft 54 ​​via bearings, so that the damping rods 53 can rotate freely around the connecting shaft 54. The damping rods 53 are spring dampers or gas springs, which can buffer the impact force on the stop bar 52. When the stop bar 52 is hit by a high-speed flying stone, the damping rods 53 will rotate to absorb the impact energy and prevent the stop bar 52 from being damaged due to excessive impact force. At the same time, after the impact, the damping rods 53 can drive the stop bar 52 to reset and restore the protective state. The bottom of the baffle 52 is provided with an inclined surface 56. The function of the inclined surface 56 is to change the trajectory of the high-speed flying stone. When the flying stone hits the inclined surface 56 of the baffle 52, it will be guided to one side by the inclined surface 56 to prevent the flying stone from rebounding and hitting the laser rutting instrument 3. An optical path gap 55 is formed between two adjacent baffles 52. The width of the optical path gap 55 can ensure that the laser signal can pass through smoothly, which will not affect the normal detection of the laser rutting instrument 3, and can also achieve an effective protection function.

[0033] A cleaning component 6 is provided on one side of the laser rutting instrument 3. This cleaning component 6 is specifically designed to remove dry dust and loose particles from the lens surface. This prevents debris from obstructing the laser signal and ensures detection accuracy. The cleaning component 6 includes a flow guide frame 61, a mounting base 62, and an L-shaped channel 63. The flow guide frame 61 is a hollow frame structure that is bolted to one side of the laser rutting instrument 3. Its opening faces the driving direction of the vehicle body 1, allowing airflow to be guided in during driving. Both the flow guide frame 61 and the fixing frame 41 have mounting holes at their tops. The mounting base 62 is fixedly installed in the mounting holes, serving to fix and support the L-shaped channel 63. The L-shaped channel 63 is a hollow structure with one end connected to the flow guide frame 61, facing the driving direction of the vehicle body 1, and the other end extending downwards, with its bottom end flush with the glass lens at the bottom of the laser rutting instrument 3. When the vehicle body 1 is moving, the external airflow will enter the guide frame 61 under the action of inertia, and enter the L-shaped channel 63 under the guidance of the guide frame 61. The airflow changes its direction in the L-shaped channel 63 and finally blows towards the glass lens surface at the bottom of the laser rutting instrument 3, blowing away the dust and small debris on the lens surface, keeping the lens clean, reducing the obstruction and interference of dust on the laser signal, and ensuring the accuracy of the detection data. In order to ensure the cleaning effect, the guide frame 61 and the inside of the L-shaped channel 63 need to be checked and cleaned regularly to prevent foreign objects from clogging the lens. At the same time, a filter cotton is detachably installed in the L-shaped channel 63 to filter large particles of impurities in the airflow and prevent impurities from hitting the lens with the airflow.

[0034] The workflow of this invention is described in detail below: First, the laser rutting device of the present invention is installed, ensuring that all components of the vehicle body 1, suspension mechanism 2, laser rutting device 3, light-shielding protection mechanism 4, protection mechanism 5, and cleaning component 6 are firmly connected and in normal working condition. At this time, the positioning component 26 is in a limited position, the limiting seat 266 on the pin 263 is inserted into the insertion hole 267 of the eccentric wheel 265, the diameter of the limiting seat 266 is adapted to the insertion hole 267, which can stably limit the position and restrict the rotation of the eccentric wheel 265, the rotating shaft I 24, and the connecting rod I 23. The connecting bracket 22 maintains a fixed height, the laser rutting device 3 is in a normal detection position, and its bottom glass lens is close to the road surface; the probe wheel 28 is in contact with the ground and can roll with the vehicle body 1; the two ends of the tension spring 25 are respectively hung on the pins 211 at the top of the fixed bracket 21 and the connecting bracket 22, and are in a pre-stretched state, storing elastic potential energy; The baffle 42 of the light-shielding and protection mechanism 4 is adjusted to a suitable angle, and the two sets of staggered baffles 42 form a closed light-shielding structure to block external light; the baffle 52 of the protection mechanism 5 hangs vertically downward, and an optical path gap 55 is formed between adjacent baffles 52; one end of the damping rod 53 is rotatably connected to the baffle 52, and the other end is rotatably sleeved on the connecting shaft 54 ​​on the other side of the laser rutting instrument 3, and is in a natural state; the guide frame 61 of the cleaning component 6 faces the driving direction of the vehicle body 1, and the mounting base 62 is fixedly installed in the mounting hole at the top of the guide frame 61 and the fixed frame 41; the L-shaped channel 63 is opened at the top of the mounting base 62, and the bottom end is flush with the glass lens.

[0035] After the equipment is started, the vehicle body 1 drives the laser rutting instrument 3 on the road to be inspected. The laser rutting instrument 3 emits laser signals through the glass lens at the bottom. The laser signals are reflected after illuminating the road surface and then received through the glass lens, thereby realizing the detection of rutting on the road surface. The detection data is transmitted and recorded in real time.

[0036] During operation, the shading mechanism 4 continuously functions. Two sets of rotating seats I 43 at the bottom of the fixed frame 41 support the baffle 42. The baffle 42 can freely adjust its angle around the rotating seats I 43 via the rotating shaft II 44. The two sets of staggered baffles 42 block external sunlight and other light, preventing direct light from reflecting off the detection area, ensuring stable transmission of the laser signal, and guaranteeing detection accuracy. Simultaneously, they also shield against external debris. The cleaning component 6 operates synchronously. The airflow generated by the vehicle body 1 during operation enters the guide frame 61, is guided by the L-shaped channel 63 on the mounting base 62, and then blows towards the glass lens at the bottom of the laser rutting instrument 3, removing dust and small debris from the lens surface. Lens cleaning prevents debris from interfering with detection; the protective mechanism 5 is always in a protective state. When high-speed flying stones or other debris collide with it, the baffle 52 first contacts the debris, and the inclined surface 56 at the bottom of the baffle 52 guides the debris to one side to prevent it from obstructing the detection area. At the same time, the damping rod 53 rotates around the connecting shaft 54 ​​to absorb the impact energy and buffer the impact force to prevent damage to the baffle 52. After the impact, the damping rod 53 drives the baffle 52 to reset and continue to play a protective role; the limit block 29 always limits the rotation angle of the connecting rod I 23 to ensure the stable operation of the suspension mechanism 2. The rotating shaft I 24 in the fixed bracket 21 and the connecting bracket 22 rotates flexibly to ensure smooth transmission of the connecting rod I 23.

[0037] When vehicle 1 travels to a bumpy road section, the probe wheel 28 rolls to the bump. When the bump depth exceeds a preset value, the probe wheel 28 experiences an upward thrust from the ground / its own weight, causing the drive bracket 27 to move up / down. The drive bracket 27 then causes the sliding column 210 to slide up / down synchronously along the guide hole at the top of the fixed bracket 21. The sliding column 210 causes the lifting plate 262 to move up / down. The lifting plate 262, through connecting rod II 264, pulls the pin 263 to slide away from the eccentric wheel 265 along the sliding hole on the fixed plate 261, causing the limiting seat 266 at one end of the pin 263 to disengage from the insertion hole 267 on the eccentric wheel 265, thus releasing the limitation on the eccentric wheel 265. At this time, the tension spring 25 releases its elastic potential energy, generating an upward pulling force that pulls the connecting bracket 22 upward. The connecting bracket 22 then causes the laser rutting device 3 to rise synchronously upward, away from the ground, preventing the laser rutting device 3 from colliding with the edge of the bump and achieving emergency avoidance.

[0038] When vehicle body 1 drives over a bumpy road section, the laser rut detector 3 is manually driven to reset downwards and stretch the tension spring 25. Then, the pin 263 is driven to re-insert into the socket 267 to continue the inspection.

[0039] After the inspection is completed, the equipment is turned off, vehicle 1 stops moving, and all mechanisms return to their initial state. The equipment can then be inspected and maintained to ensure that subsequent inspections can proceed normally.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A laser rut detector for highway pavement inspection, comprising a laser rut detector (3) mounted on the front of the vehicle body (1), characterized in that, It also includes a suspension mechanism (2), which comprises: Fixed bracket (21) is fixed to the front beam of the vehicle body (1); The connecting bracket (22) is adjustable and can be mounted on one side of the fixed bracket (21). The connecting bracket (22) is fixed on one side of the laser rutting instrument (3). Two connecting rods I (23), each of which is rotatably connected at both ends to the outside of the fixed bracket (21) and the connecting bracket (22); The positioning component (26) is disposed on the fixed bracket (21) and is used to limit the connecting rod I (23) to fix the detection position of the laser rutting instrument (3); The drive bracket (27) is slidably mounted on the top of the fixed bracket (21), and one end of the drive bracket (27) is engaged with the positioning component (26); The probe wheel (28) is rotatably connected to the bottom end of the drive bracket (27), and the probe wheel (28) is in contact with the ground; The tension spring (25) is attached at both ends to the fixed bracket (21) and the connecting bracket (22). When the probe wheel (28) passes through a pothole, it causes the drive bracket (27) to slide relative to the fixed bracket (21), triggering the positioning component (26) to release the limit on the connecting rod I (23), and the tension spring (25) pulls the connecting bracket (22) to rise so as to lift the laser rutting instrument (3) away from the ground.

2. The laser rutting instrument according to claim 1, characterized in that, The positioning assembly (26) includes an eccentric wheel (265), two fixed plates (261), two pins (263), two connecting rods II (264), and two lifting plates (262). The eccentric wheel (265) is fixedly sleeved on the rotating shaft I (24) inside the fixed bracket (21), and both ends of the eccentric wheel (265) are provided with insertion holes (267). The two fixing plates (261) are fixed to the top of the fixing bracket (21); The two pins (263) are respectively slidably inserted through the two fixing plates (261); The two lifting plates (262) are respectively slidably installed on the top of the fixed bracket (21) and connected to the drive bracket (27); Each of the connecting rods II (264) is rotatably connected at both ends to the corresponding pin (263) and the lifting plate (262); When one end of the pin (263) is inserted into the socket (267), it restricts the rotation of the eccentric wheel (265); When the drive bracket (27) drives the lifting plate (262) to slide, the connecting rod II (264) pulls the pin (263) away from the socket (267) to release the limit.

3. The laser rutting instrument according to claim 2, characterized in that, The pin (263) is provided with a limiting seat (266) at one end near the eccentric wheel (265). The diameter of the limiting seat (266) is adapted to the insertion hole (267). When the limiting seat (266) is inserted into the insertion hole (267), it restricts the rotation of the eccentric wheel (265).

4. The laser rutting instrument according to claim 1, characterized in that, Limiting blocks (29) are fixedly connected to both sides of the fixed bracket (21) and the connecting bracket (22). The limiting blocks (29) are used to limit the rotation angle of the connecting rod I (23) to ensure that the connecting bracket (22) rises and falls smoothly.

5. The laser rutting instrument according to claim 1, characterized in that, The top of the fixed bracket (21) and the connecting bracket (22) are respectively fixedly connected with hanging pins (211), and the two ends of the tension spring (25) are respectively hung on the corresponding hanging pins (211).

6. The laser rutting instrument according to claim 1, characterized in that, It also includes a light-shielding protection mechanism (4), which includes a fixed frame (41) and two sets of baffles (42). The fixed frame (41) is fixedly sleeved on the outer wall of the laser rutting instrument (3); The two sets of baffles (42) are rotatably connected to the bottom of the fixed frame (41) and are staggered to block external light.

7. The laser rutting instrument according to claim 6, characterized in that, The bottom of the fixed frame (41) is fixedly connected to two sets of rotating seats I (43). Each baffle (42) is hinged to the corresponding rotating seat I (43) through a rotating shaft II (44), so that the baffle (42) can rotate relative to the fixed frame (41) to adjust the shading angle.

8. The laser rutting instrument according to claim 1, characterized in that, It also includes a protective mechanism (5), which includes multiple rotating seats II (51), multiple baffles (52), multiple damping rods (53) and a connecting shaft (54); Multiple rotating seats II (51) are fixed to the bottom of one side of the laser rutting instrument (3); One end of each of the stop bars (52) is rotatably connected to the corresponding rotating seat II (51), and the other end is rotatably connected to the corresponding damping rod (53). The connecting shaft (54) is fixed to the other side of the laser rutting instrument (3), and the other ends of the multiple damping rods (53) are rotatably sleeved on the connecting shaft (54). The baffle (52) is used to block flying stones from hitting the laser rutting instrument (3), and the damping rod (53) is used to buffer the impact force on the baffle (52) and drive it to reset.

9. The laser rutting instrument according to claim 8, characterized in that, The bottom of the baffle (52) is provided with a slope (56), and an optical path gap (55) is formed between two adjacent baffles (52). The inclined plane (56) is used to change the trajectory of the flying stone, and the optical path gap (55) is used for laser signal transmission.

10. The laser rutting instrument according to claim 6, characterized in that, It also includes a cleaning component (6), which includes a flow guide frame (61) and a mounting base (62); The flow guide frame (61) is fixed to one side of the laser rutting instrument (3) and is used to guide the airflow of the vehicle into it; The mounting base (62) is fixed to the top of the flow guide frame (61) and the fixed frame (41), and an L-shaped channel (63) is provided on the top of the mounting base (62). The L-shaped channel (63) is connected at one end to the flow guide frame (61) and at the other end to the surface of the glass lens at the bottom of the laser rutting instrument (3) to guide the airflow to blow towards the glass lens to remove surface debris.

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