A vehicle laser radar test barrier device

Abstract

The present application relates to the technical field of vehicle testing, in particular to a kind of vehicle laser radar test barrier device, including bottom plate, support rod, placement plate, clamping mechanism, long plate, connecting block, longitudinal position adjusting mechanism, groove, rack one, transverse position adjusting mechanism and limiting mechanism.The present application is adjusted by setting longitudinal position adjusting mechanism to realize the longitudinal distance between barrier and laser radar, during longitudinal distance adjustment, setting transverse position adjusting mechanism realizes the reciprocating adjustment of the lateral displacement between barrier and laser radar, while realizing the adjustment of lateral distance and longitudinal distance, vehicle laser radar can be tested in the process of barrier undirectional movement, more in line with actual situation, to reduce the difference between test result and actual effect, improve test effect;Limiting mechanism is also set, when target reflector plate rotates along rotating disc, it is always faced with the direction of laser radar, laser reflection effect is good, improve the test precision of laser radar.

Description

Technical Field

[0001] This invention patent relates to the field of vehicle testing technology, specifically to a vehicle-mounted lidar obstacle testing device. Background Technology

[0002] A lidar system is a radar system that uses laser beams to detect the position, velocity, and other characteristics of a target. Its working principle involves emitting a detection signal (laser beam) towards the target, then comparing the received signal (target echo) with the emitted signal. After appropriate processing, relevant information about the target can be obtained, such as its distance, azimuth, altitude, speed, attitude, and even shape. This allows for the detection, tracking, and identification of targets such as aircraft and missiles. It consists of a laser transmitter, an optical receiver, a turntable, and an information processing system. The laser converts electrical pulses into light pulses and emits them. The optical receiver then converts the light pulses reflected from the target back into electrical pulses and sends them to a display. Vehicle-mounted LiDAR, also known as vehicle-mounted 3D laser scanner, is a displacement-type 3D laser scanning system. It is one of the most effective tools for urban modeling. The 3D laser scanner uses the characteristics of laser's fast propagation speed and good linearity to emit laser light and receive the returned information to describe the surface morphology of the measured object. Due to the different reflectivity of the measured object, the received returned information also varies in strength. The so-called 3D is achieved by using the horizontal rotation of the scanner to cover an entire area, a process very similar to the 360-degree panoramic photography.

[0003] During the production process of lidar, it is usually necessary to inspect the quality of the lidar. However, current inspection devices typically fix the position of obstacles, usually placing obstacles only on the side perpendicular to the lidar. Since the position of the obstacles is not moved during the inspection process, it may lead to poor lidar detection results.

[0004] In summary, there is an urgent need to design a vehicle-mounted lidar obstacle detection device to solve the aforementioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a vehicle-mounted lidar obstacle testing device. To overcome the shortcomings of the prior art, this invention adjusts the longitudinal distance between the obstacle and the lidar by setting a longitudinal position adjustment mechanism. Simultaneously, a lateral position adjustment mechanism is set to adjust the lateral displacement between the obstacle and the lidar, thus simultaneously adjusting both the lateral and longitudinal distances. This allows for testing of the vehicle-mounted lidar during multi-directional obstacle displacement, more closely reflecting actual conditions, thereby reducing the discrepancy between test results and actual effects and improving testing effectiveness.

[0006] The present invention is implemented as follows: it includes a base plate, a support rod on the top of the base plate, a placement plate on the top of the support rod, and a clamping mechanism on the top of the placement plate, the clamping mechanism being used to clamp the lidar.

[0007] Two long plates are provided on one side of the base plate, and the two long plates are located at the two ends of the same side of the base plate. The top of the long plates is provided with connecting blocks arranged along the length direction of the long plates. The top of the two connecting blocks is provided with a longitudinal position adjustment mechanism. The top of the connecting blocks is provided with a groove, which is arranged along the length direction of the connecting blocks. The bottom of the groove is provided with a toothed rack.

[0008] The longitudinal position adjustment mechanism includes a mounting plate, with side plates on the bottom of both sides in the width direction of the mounting plate. A rotating shaft is provided between the two side plates, with one end of the rotating shaft passing through the corresponding side plate. A motor is provided at the end of the rotating shaft that passes through the side plate. Two rollers are fitted on the outer wall of the rotating shaft, and the two rollers are respectively located in the grooves on the corresponding sides. The outer wall of the rollers is provided with a second rack arranged along the circumference of the rollers, and the second rack meshes with the first rack. The mounting plate is provided with a lateral position adjustment mechanism, and there are two lateral position adjustment mechanisms, which are respectively located at both ends of the mounting plate.

[0009] The lateral position adjustment mechanism includes a circular turntable. A vertically arranged connecting rod is located at the bottom of the turntable, with its bottom end passing through a mounting plate. A helical gear is located at the bottom of the connecting rod, and a helical gear two meshes with the helical gear one on the outer wall of the rotating shaft. A vertical rod is located at the top of the turntable, positioned at its edge. A limiting block is located at the top of the vertical rod, and a target reflector is located at the top of the limiting block. The bottom surface of the limiting block has a groove for the vertical rod to extend into. One end of the vertical rod extending into the limiting block has a cylinder. A groove two, adapted to the cylinder, is located inside the limiting block, allowing the cylinder to rotate within the groove two. A limiting mechanism is fitted onto the outer wall of the limiting block.

[0010] Furthermore, the clamping mechanism includes vertical plates at both ends of the placement plate along its length. Both vertical plates are provided with a horizontal bar passing through the thickness direction of the vertical plates. A clamping plate is provided at the end of the horizontal bar facing the other vertical plate, and a baffle is provided at the end of the horizontal bar away from the other vertical bar. A spring is provided between the vertical plate and the clamping plate, which is sleeved on the outer wall of the horizontal bar.

[0011] Furthermore, the clamping plate is curved.

[0012] Furthermore, a buffer pad is provided on the side of the clamping plate facing away from the crossbar.

[0013] Furthermore, the limiting mechanism includes a collar, which is rectangular and arranged along the length of the mounting plate. The collar is fitted onto the outer wall of the limiting block. The bottom of the two short sides of the rectangular collar is provided with connecting rod two, and the bottom of the connecting rod two is provided with a slider. The top surface of the mounting plate is provided with a sliding groove, which is arranged along the width of the mounting plate. The slider is adapted to the sliding groove and can slide within the sliding groove.

[0014] Furthermore, the side wall of the connecting block is provided with a scale line, which is set along the length direction of the connecting block.

[0015] Furthermore, the outer wall of the collar is provided with a second scale line, which is set along the length of the collar.

[0016] Furthermore, the top surface of the placement board is provided with anti-slip texture.

[0017] Furthermore, the bottom edge of the target reflector is on the same horizontal line as the placement plate.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (1) When the motor starts, the shaft rotates, which on the one hand drives the roller to move along the groove to achieve the longitudinal displacement of the obstacle; on the other hand, by setting the meshing helical gear one and helical gear two, the turntable is driven to rotate, which drives the target reflector to move with the rotation of the turntable, thus achieving the lateral reciprocating displacement of the obstacle, simulating the obstacle in front of the vehicle that moves in an undirected manner in the actual situation, which fits the actual situation, thereby reducing the difference between the test results and the actual effect and improving the test effect.

[0020] (2) By setting a limiting mechanism, the target reflector is always facing the direction of the lidar when it rotates along the turntable, resulting in good laser reflection and improved lidar testing accuracy.

[0021] (3) Two target reflectors are provided to test the accuracy of the lidar when facing multiple obstacles. Attached Figure Description

[0022] Figure 1 This is a top view of a vehicle-mounted lidar obstacle testing device according to an embodiment of the present invention;

[0023] Figure 2 This is a structural diagram of the left view of a vehicle-mounted lidar obstacle testing device according to an embodiment of the present invention;

[0024] Figure 3 This is a front view of a vehicle-mounted lidar obstacle testing device according to an embodiment of the present invention;

[0025] Figure 4 This is a top view of the placement plate in an embodiment of the present invention;

[0026] Figure 5 This is a structural diagram of the meshing point between rack one and rack two in an embodiment of the present invention;

[0027] Figure 6 yes Figure 2 Structural diagram at point A;

[0028] Figure 7 yes Figure 2 Structural diagram at point B;

[0029] Figure 8 This is a top view of the turntable in an embodiment of the present invention.

[0030] The reference numerals in the above figures are as follows: 1. Base plate; 2. Support rod; 3. Placement plate; 4. Clamping mechanism; 401. Vertical plate; 402. Horizontal rod; 403. Clamping plate; 404. Baffle; 405. Spring; 406. Buffer pad; 5. Long plate; 6. Connecting block; 7. Longitudinal position adjustment mechanism; 701. Mounting plate; 702. Side plate; 703. Rotating shaft; 704. Motor; 705. Roller; 706. Rack II; 8. Lateral position adjustment mechanism; 801. Turntable; 802. Connecting rod I; 803. Helical gear I; 804. Helical gear II; 805. Vertical rod; 806. Limiting block; 807. Groove I; 808. Cylinder; 809. Groove II; 9. Limiting mechanism; 901. Ring; 902. Connecting rod 2; 903. Slider; 904. Slide groove; 10. Groove; 11. Rack 1; 12. Target reflector; 13. Anti-slip texture. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0032] The implementation of the present invention will be described in detail below with reference to specific embodiments.

[0033] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this invention, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this 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 accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0034] Reference Figure 1-8 The image shown is a preferred embodiment of the present invention.

[0035] Example: A vehicle-mounted lidar obstacle testing device includes a base plate 1, a support rod 2 fixedly installed on the top of the base plate 1, a placement plate 3 fixedly installed on the top of the support rod 2, and a clamping mechanism 4 installed on the top of the placement plate 3. The clamping mechanism 4 is used to clamp and fix the vehicle-mounted lidar.

[0036] Two long plates 5 are integrally connected to one side of the base plate 1. The two long plates 5 are located at both ends of the same side of the base plate 1. A connecting block 6 is fixedly installed on the top of the long plate 5 along the length direction of the long plate 5. A longitudinal position adjustment mechanism 7 is installed on the top of the two connecting blocks 6. A groove 10 is opened on the top of the connecting block 6. The groove 10 is arranged along the length direction of the connecting block 6. A rack 11 is installed at the bottom of the groove 10.

[0037] The longitudinal position adjustment mechanism 7 includes a mounting plate 701. Side plates 702 are integrally connected to the bottom of both sides of the mounting plate 701 in the width direction. A rotating shaft 703 is installed between the two side plates 702. One end of the rotating shaft 703 extends through the corresponding side plate 702, and a motor 704 is installed at the end of the rotating shaft 703 extending through the side plate 702. When the motor 704 starts, it can drive the rotating shaft 703 to rotate. Two rollers 705 are fitted on the outer wall of the rotating shaft 703. The rollers 705 are fixedly connected to the rotating shaft 703. The two rollers 705 are respectively located in the grooves 10 on the corresponding sides. A second rack 706 is installed on the outer wall of the roller 705 along the circumferential direction of the roller 705. The second rack 706 meshes with a first rack 11. A lateral position adjustment mechanism 8 is installed on the mounting plate 701. There are two lateral position adjustment mechanisms 8, located at opposite ends of the mounting plate 701.

[0038] The lateral position adjustment mechanism 8 includes a circular turntable 801. A vertically arranged connecting rod 802 is fixedly installed at the bottom of the turntable 801. The bottom end of the connecting rod 802 passes through the mounting plate 701. A helical gear 803 is fixedly installed at the bottom of the connecting rod 802. The helical gear 803 is horizontally arranged. A helical gear 804, which meshes with the helical gear 803, is fixedly installed on the outer wall of the rotating shaft 703. The helical gear 804 is vertically arranged. A vertical rod 805 is fixedly installed at the top of the turntable 801. At the edge of the turntable 801, a limiting block 806 is installed on the top of the vertical rod 805, and a target reflector plate 12 is fixedly installed on the top of the limiting block 806; a groove 807 is opened on the bottom surface of the limiting block 806 for the vertical rod 805 to extend into; a cylinder 808 is fixedly installed on one end of the vertical rod 805 that extends into the limiting block 806; a groove 809 adapted to the cylinder 808 is opened in the limiting block 806, and the cylinder 808 can rotate in the groove 809; a limiting mechanism 9 is installed on the outer wall of the limiting block 806.

[0039] By adopting the above technical solution, when the motor 704 starts, the rotating shaft 703 rotates, driving the roller 705 to move along the groove 10, thereby achieving longitudinal displacement of the obstacle. At the same time, by setting helical gear 1 803 and helical gear 2 804, when the rotating shaft 703 rotates, it drives the turntable 801 to rotate, and the target reflector 12 moves with the rotation of the turntable 801, thereby achieving lateral displacement of the obstacle. It also realizes the adjustment of lateral and longitudinal distances, and can test the vehicle lidar during the non-directional movement of the obstacle, which is more in line with the actual situation, thereby reducing the difference between the test results and the actual effect and improving the test effect.

[0040] As a preferred embodiment, the clamping mechanism 4 includes vertical plates 401 at both ends of the placement plate 3 along its length. Both vertical plates 401 are fixedly mounted with horizontal bars 402 passing through the thickness direction of the vertical plates 401. A clamping plate 403 is mounted on one end of the horizontal bar 402 facing the other vertical plate 401, and a baffle 404 is fixedly mounted on the other end of the horizontal bar 402 away from the other vertical bar 805. A spring 405 is installed between the vertical plate 401 and the clamping plate 403, and the spring 405 is always in a compressed state.

[0041] By adopting the above technical solution, the spring 405 drives the clamping plate 403 to clamp and fix the lidar, preventing the lidar from falling, and making it convenient to use.

[0042] As a preferred embodiment, the clamping plate 403 is arc-shaped.

[0043] By adopting the above technical solution, the arc-shaped clamping plate 403 has a better clamping effect.

[0044] As a preferred embodiment, the side of the clamping plate 403 facing away from the crossbar 402 is provided with a buffer pad 406.

[0045] By adopting the above technical solution, the buffer pad 406 can reduce wear on the lidar housing and better protect the device.

[0046] As a preferred embodiment, the cushioning pad 406 is made of rubber.

[0047] By adopting the above technical solution, the rubber material has elastic deformation, good shock absorption effect, and a high coefficient of friction, making the lidar more secure.

[0048] As a preferred embodiment, the limiting mechanism 9 includes a collar 901, which is rectangular and arranged along the length of the mounting plate 701. The collar 901 is fitted onto the outer wall of the limiting block 806. The bottom of the two short sides of the rectangular collar 901 is provided with connecting rods 902, and the bottom of the connecting rods 902 is provided with sliders 903. The top surface of the mounting plate 701 is provided with a groove 904, which is arranged along the width of the mounting plate 701. The slider 903 is adapted to the groove 904 and can slide within the groove 904.

[0049] By adopting the above technical solution, and by setting the limiting mechanism 9 so that the target reflector 12 always faces the direction of the lidar when it rotates along the turntable 801, the laser reflection effect is good and the testing accuracy of the lidar is improved.

[0050] As a preferred embodiment, the side wall of the connecting block 6 is engraved with a scale line, which is set along the length direction of the connecting block 6.

[0051] By adopting the above technical solution, the longitudinal displacement of the target reflector 12 can be calculated through the scale line to verify the measurement results of the lidar.

[0052] As a preferred embodiment, the outer wall of the collar 901 is engraved with a second scale line, which is set along the length direction of the collar 901.

[0053] By adopting the above technical solution, the lateral displacement of the target reflector 12 can be calculated through the scale line to verify the measurement results of the lidar.

[0054] As a preferred embodiment, the top surface of the placement plate 3 is provided with anti-slip texture.

[0055] By adopting the above technical solution, the anti-slip texture 13 increases the friction coefficient between the laser radar and the placement plate 3, thus preventing the laser radar from sliding.

[0056] As a preferred embodiment, the bottom edge of the target reflector 12 is located on the same horizontal line as the placement plate 3.

[0057] By adopting the above technical solution, the lidar and the target reflector 12 are located at the same horizontal height, which can improve the testing accuracy of the lidar.

[0058] Working principle: When in use, the motor 704 is started, and the rotating shaft 703 rotates, driving the roller 705 to rotate. Since the rack 2 706 on the outer wall of the roller 705 meshes with the rack 11, the roller 705 moves along the length of the groove 10, realizing the longitudinal displacement of the obstacle. At the same time, the rotating shaft 703 rotates, driving the helical gear 2 804 to rotate. Since the helical gear 1 803 meshes with the helical gear 2 804, the helical gear 1 803 also rotates, driving the turntable 801 to rotate. This causes the target reflector 12 to move along with the rotation of the turntable 801, realizing the lateral displacement of the obstacle.

[0059] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vehicle-mounted lidar obstacle detection device, characterized in that, Includes a base plate (1), the top of the base plate (1) is provided with a support rod (2), the top of the support rod (2) is provided with a placement plate (3), the top of the placement plate (3) is provided with a clamping mechanism (4), the clamping mechanism (4) is used to clamp the lidar; Two long plates (5) are provided on one side of the base plate (1). The two long plates (5) are located at the two ends of the same side of the base plate (1). The top of the long plate (5) is provided with a connecting block (6) arranged along the length direction of the long plate (5). The top of the two connecting blocks (6) is provided with a longitudinal position adjustment mechanism (7). The top of the connecting block (6) is provided with a groove (10). The groove (10) is arranged along the length direction of the connecting block (6). The bottom of the groove (10) is provided with a rack (11). The longitudinal position adjustment mechanism (7) includes a mounting plate (701). Side plates (702) are provided at the bottom of both sides of the mounting plate (701) in the width direction. A rotating shaft (703) is provided between the two side plates (702). One end of the rotating shaft (703) extends through the corresponding side plate (702). A motor (704) is provided at the end of the rotating shaft (703) extending through the side plate (702). Two rollers (705) are fitted onto the outer wall of the rotating shaft (703). Two rollers (705) are respectively located in the grooves (10) on the corresponding sides. The outer wall of the roller (705) is provided with a second rack (706) arranged along the circumferential direction of the roller (705). The second rack (706) meshes with the first rack (11). The mounting plate (701) is provided with a lateral position adjustment mechanism (8). There are two lateral position adjustment mechanisms (8), and the two lateral position adjustment mechanisms (8) are respectively located at both ends of the mounting plate (701). The lateral position adjustment mechanism (8) includes a circular turntable (801). A vertically arranged connecting rod (802) is provided at the bottom of the turntable (801). The bottom end of the connecting rod (802) passes through the mounting plate (701). A helical gear (803) is provided at the bottom of the connecting rod (802). A helical gear (804) meshes with the helical gear (803) on the outer wall of the rotating shaft (703). A vertical rod (805) is provided at the top of the turntable (801). The vertical rod (805) is located at the edge of the turntable (801). The top of the 05) is provided with a limiting block (806), and the top of the limiting block (806) is provided with a target reflector plate (12); the bottom surface of the limiting block (806) is provided with a groove (807) for the vertical rod (805) to extend into, and one end of the vertical rod (805) extending into the limiting block (806) is provided with a cylinder (808), and the limiting block (806) is provided with a groove (809) that is adapted to the cylinder (808), and the cylinder (808) can rotate in the groove (809); the outer wall of the limiting block (806) is provided with a limiting mechanism (9); The limiting mechanism (9) includes a collar (901), which is rectangular and arranged along the length direction of the mounting plate (701). The collar (901) is sleeved on the outer wall of the limiting block (806). The bottom of the two short sides of the rectangular collar (901) is provided with a connecting rod (902). The bottom of the connecting rod (902) is provided with a slider (903). The top surface of the mounting plate (701) is provided with a sliding groove (904). The sliding groove (904) is arranged along the width direction of the mounting plate (701). The slider (903) is adapted to the sliding groove (904) and can slide in the sliding groove (904).

2. The vehicle-mounted lidar obstacle detection device according to claim 1, characterized in that, The clamping mechanism (4) includes vertical plates (401) located at both ends of the placement plate (3) along its length. Each of the two vertical plates (401) is provided with a horizontal bar (402) passing through the thickness direction of the vertical plate (401). A clamping plate (403) is provided at one end of the horizontal bar (402) facing the other vertical plate (401), and a baffle (404) is provided at the other end of the horizontal bar (402) away from the other vertical bar (805). A spring (405) is provided between the vertical plate (401) and the clamping plate (403) and sleeved on the outer wall of the horizontal bar (402).

3. The vehicle-mounted lidar obstacle detection device according to claim 2, characterized in that, The clamping plate (403) is arc-shaped.

4. The vehicle-mounted lidar obstacle detection device according to claim 2, characterized in that, The clamping plate (403) has a buffer pad (406) on the side facing away from the crossbar (402).

5. The vehicle-mounted lidar obstacle detection device according to claim 4, characterized in that, The cushioning pad (406) is made of rubber.

6. The vehicle-mounted lidar obstacle detection device according to claim 1, characterized in that, The side wall of the connecting block (6) is provided with a scale line, which is set along the length direction of the connecting block (6).

7. The vehicle-mounted lidar obstacle detection device according to claim 1, characterized in that, The outer wall of the collar (901) is provided with a second scale line, which is set along the length direction of the collar (901).

8. The vehicle-mounted lidar obstacle detection device according to claim 1, characterized in that, The top surface of the placement plate (3) is provided with anti-slip texture (13).

9. A vehicle-mounted lidar obstacle detection device according to claim 1, characterized in that, The bottom edge of the target reflector (12) is at the same horizontal level as the placement plate (3).

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