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CN-122009033-A - Laser radar anti-collision protection device for automatic driving in dangerous scene

CN122009033ACN 122009033 ACN122009033 ACN 122009033ACN-122009033-A

Abstract

The invention relates to the technical field of vehicle sensors, in particular to a laser radar anti-collision protection device for automatic driving in a dangerous scene, which comprises a protection box and a radar body, wherein the radar body is fixed on a floating base arranged in the protection box, the floating base is supported on the inner bottom surface of the protection box through a multidirectional composite energy absorption bracket, a deflectable protection cover is arranged at the front part of the protection box, two sides of the deflectable protection cover are connected with the front side wall of the protection box through flexible articulated arms, guide rail flanges are arranged at the inner side edges of the deflectable protection cover, and the guide rail flanges are in sliding fit with arc-shaped limit grooves formed in the front side wall of the protection box. This laser radar anticollision protector of dangerous scene autopilot can effectively reduce the direct damage of impact force to the laser radar body, promotes its protection reliability under complicated dangerous environment.

Inventors

  • Qiao Linyan
  • LIU GANG
  • HE HAORAN
  • YU SONGYANG
  • Chen Yingye
  • SUN ZHEN
  • HAO CHANGFENG
  • YE HUALEI

Assignees

  • 河南工学院

Dates

Publication Date
20260512
Application Date
20260203

Claims (10)

  1. 1. The laser radar anti-collision protection device for automatic driving in dangerous scenes comprises a protection box (1) and a radar body (2), and is characterized in that the radar body (2) is fixed on a floating base (3) arranged inside the protection box (1), the floating base (3) is supported on the inner bottom surface of the protection box (1) through a multidirectional composite energy absorption bracket (4), a deflectable protection cover (5) is arranged at the front part of the protection box (1), two sides of the deflectable protection cover (5) are connected with the front side wall of the protection box (1) through flexible hinge arms (6), guide rail flanges (7) are arranged at the edges of the inner sides of the deflectable protection cover (5), and the guide rail flanges (7) are in sliding fit with arc-shaped limit grooves (8) formed in the front side wall of the protection box (1).
  2. 2. The laser radar anti-collision protection device for automatic driving in dangerous scenes according to claim 1, wherein the multidirectional composite energy absorbing support (4) comprises an annular elastic buffer pad (41), V-shaped elastic support arms (42) and laminated damping blocks (43), the annular elastic buffer pad (41) is located between the bottom of the floating base (3) and the bottom plate of the protective box (1), the V-shaped elastic support arms (42) are arranged on two sides of the floating base (3), one end of each V-shaped elastic support arm is connected with the side wall of the floating base (3), the other end of each V-shaped elastic support arm is connected with the front side wall of the protective box (1), and the laminated damping blocks (43) are embedded in the hinge areas of two arm sections of the V-shaped elastic support arms (42).
  3. 3. The laser radar anti-collision protection device for automatic driving in dangerous scenes according to claim 2, wherein the laminated damping blocks (43) are formed by hot pressing and vulcanization of more than five layers of alternately overlapped stainless steel sheets and high damping rubber layers, and edges of adjacent stainless steel sheets are arranged in a staggered mode to form shearing deformation gaps.
  4. 4. The laser radar anti-collision protection device for automatic driving in dangerous situations according to claim 2, wherein the two arm sections of the V-shaped elastic support arm (42) are provided with a butt joint concave cavity at the hinge joint, and the laminated damping block (43) is integrally embedded into the butt joint concave cavity and jointly fixes the two arm sections and the damping block through a through rivet.
  5. 5. The laser radar anti-collision protection device for automatic driving in dangerous situations according to claim 1, wherein the guide rail flange (7) is of a T-shaped protruding structure extending backwards along the inner side edge of the deflectable protection cover (5), and the cross section of the guide rail flange is trapezoidal.
  6. 6. The laser radar anti-collision protection device for automatic driving in dangerous scenes according to claim 1, wherein the arc-shaped limiting groove (8) is formed along an arc track taking the hinge center of the flexible hinge arm (6) as a circle center, the width of a notch of the arc-shaped limiting groove is larger than the thickness of the guide rail flange (7), and a polytetrafluoroethylene lining layer is arranged at the bottom of the groove.
  7. 7. The laser radar anti-collision protection device for automatic driving in dangerous scenes according to claim 1, wherein a plurality of guide strips (9) which are transversely distributed are arranged on the outer surface of the deflectable protective cover (5), and the guide strips (9) are metal sheets with trapezoid cross sections and are arranged in an outward inclined mode along the surface of the protective cover.
  8. 8. The laser radar anti-collision protection device for automatic driving in dangerous situations according to claim 2, wherein the bottom of the floating base (3) is provided with a downward extending positioning column (10), and the positioning column (10) is arranged in the central hole of the annular elastic buffer pad (41) in a penetrating way and forms clearance fit with the limit sleeve (11) on the bottom plate of the protective box (1).
  9. 9. The laser radar anti-collision protection device for automatic driving in dangerous situations according to claim 1, wherein a sealing lip (12) is arranged between the bottom edge of the deflectable protective cover (5) and the front side wall of the protective box (1), and the sealing lip (12) is made of a silica gel material.
  10. 10. The laser radar anti-collision protection device for automatic driving in dangerous scenes according to claim 1, wherein U-shaped reinforcing ribs (13) are arranged at four corners of the outer wall of the protection box (1), and the U-shaped reinforcing ribs (13) are welded on the outer wall of the protection box (1).

Description

Laser radar anti-collision protection device for automatic driving in dangerous scene Technical Field The invention relates to the technical field of vehicle sensors, in particular to a laser radar anti-collision protection device for automatic driving in a dangerous scene. Background With the rapid development of automatic driving technology, laser radar has been widely used for various intelligent vehicles as a key sensor for realizing environmental perception and obstacle recognition. In high-risk driving environments such as construction areas, narrow roadways or sudden obstacle frequently, the laser radar is extremely easy to suffer from external impact, scratch or invasion of foreign matters, so that normal work of the laser radar is influenced, and even equipment is damaged. Therefore, designing a reliable and effective physical protection structure for the laser radar has become a necessary measure for improving the operation safety of the automatic driving system in dangerous scenes. In the prior art, patent number CN222014457U discloses a protective structure of laser radar for automatic driving, and the device realizes the up-and-down movement of radar through lifting assembly cooperation slide rail to integrate clean mechanism in order to maintain the surface clean. However, the front side of the protective box of the structure adopts a fixed rigid front wall, and the laser radar is directly connected to the lifting mechanism through a mounting plate, so that the protective box is lack of effective buffering capability for transverse impact. When the vehicle encounters a lateral collision or scratch, the impact force is directly transmitted to the radar body through the rigid box body, and the deformation of the outer shell and the deflection or fracture of the inner optical component are easily caused. In addition, the structure is not provided with any energy absorption mechanism capable of controllably deforming at the moment of collision, and is protected only by means of static shielding, so that complex and changeable dangerous working conditions are difficult to deal with, the protection effect is limited, and the reliability is insufficient. Disclosure of Invention The invention aims to provide a laser radar anti-collision protection device for automatic driving in a dangerous scene, which aims to solve the problems that the existing laser radar protection device provided by the background art lacks an effective buffer mechanism when encountering lateral collision, and impact force is easily directly transmitted to a radar body to cause equipment damage. The laser radar anti-collision protection device comprises a protection box and a radar body, wherein the radar body is fixed on a floating base arranged in the protection box, the floating base is supported on the inner bottom surface of the protection box through a multidirectional composite energy absorption bracket, a deflectable protection cover is arranged at the front part of the protection box, two sides of the deflectable protection cover are connected with the front side wall of the protection box through flexible articulated arms, guide rail flanges are arranged at the edges of the inner sides of the deflectable protection cover, and the guide rail flanges are in sliding fit with arc-shaped limit grooves formed in the front side wall of the protection box. Preferably, the multidirectional composite energy-absorbing support comprises an annular elastic buffer cushion, a V-shaped elastic support arm and a lamination damping block, wherein the annular elastic buffer cushion is positioned between the bottom of the floating base and the bottom plate of the protective box, the V-shaped elastic support arm is arranged on two sides of the floating base, one end of the V-shaped elastic support arm is connected with the side wall of the floating base, the other end of the V-shaped elastic support arm is connected with the front side wall of the protective box, and the lamination damping block is embedded in the hinge area of two arm sections of the V-shaped elastic support arm. Preferably, the laminated damping block is formed by hot pressing and vulcanization of more than five layers of alternately laminated stainless steel sheets and high damping rubber layers, and the edges of adjacent stainless steel sheets are arranged in a staggered manner to form a shearing deformation gap. Preferably, the two arm sections of the V-shaped elastic support arm are provided with a butt joint concave cavity at the hinge joint, the lamination damping block is integrally embedded into the butt joint concave cavity, and the two arm sections and the damping block are jointly fixed through a through rivet. Preferably, the guide rail flange is a T-shaped protruding structure extending backwards along the inner side edge of the deflectable protective cover, and the cross section of the guide rail flange is trapezoidal. Preferably, the arc-shaped limiting gr