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CN-224231967-U - Test fixture

CN224231967UCN 224231967 UCN224231967 UCN 224231967UCN-224231967-U

Abstract

The utility model provides a test fixture for test laser radar's detection performance, test fixture includes fixing base and first shielding plate, and the fixing base is fixed with predetermineeing the position appearance laser radar. The first shielding plate is movable in a first direction, the first shielding plate is arranged on one side of the window close to the laser radar, and the first shielding plate is configured to shield part or all of the field of view of the laser radar when moving in the first direction. When the first shielding plate shields part or the whole view field range of the laser radar, part of the area of the first shielding plate shields at least part of detection light beams emitted by the laser radar. The embodiment of the disclosure is beneficial to realizing accurate control of the shielding range of the laser radar view field, improving the test precision of the laser radar detection performance and ensuring the consistency of test results when the same laser radar or different laser radars are tested for multiple times.

Inventors

  • LI ZHAOQIN
  • HUANG KANG
  • ZHU LIN
  • ZHU KANG

Assignees

  • 上海禾赛科技有限公司

Dates

Publication Date
20260512
Application Date
20250326

Claims (11)

  1. 1. The test fixture is characterized by being used for testing the detection performance of the laser radar and comprising a fixed seat and a first shielding plate, wherein, The fixing seat fixes the laser radar in a preset pose; The first shielding plate can move along a first direction, the first shielding plate is arranged on one side close to a window of the laser radar, and the first shielding plate is configured to shield part or all of the view field range of the laser radar when moving along the first direction; When the first shielding plate shields part or all of the view field range of the laser radar, a part of the area of the first shielding plate shields at least part of detection light beams emitted by the laser radar.
  2. 2. The test fixture of claim 1, wherein the first direction is a vertical direction and the first shutter is configured to block a portion or all of a vertical field of view of the lidar.
  3. 3. The test fixture of claim 1, wherein the first direction is a horizontal direction and the first shutter is configured to block a portion or all of a horizontal field of view of the lidar.
  4. 4. The test fixture of any one of claims 1-3, wherein the first shielding plate comprises a first light shielding portion, a second light shielding portion, and a light transmitting portion, wherein, Along the first direction, the light transmission part is located between the first shading part and the second shading part, and in the process that the first shading plate moves along the first direction, the first shading part or the second shading part shields part or all of the view field range of the laser radar.
  5. 5. The test fixture of claim 4, wherein the light-transmitting portion comprises a void structure or a light-transmitting material, and wherein the light-transmitting portion is sized to completely cover a field of view of the lidar.
  6. 6. A test fixture as claimed in any one of claims 1 to 3, further comprising a locating member configured to maintain the position of the first shutter plate in the first direction fixed.
  7. 7. The test fixture of claim 6, further comprising a guide rail disposed along the first direction, the first shutter being configured to move along the guide rail relative to the mount.
  8. 8. The test fixture of claim 7, wherein the positioning member comprises at least one of a positioning block or a positioning pin, wherein two ends of the positioning block in the first direction are respectively abutted with the fixing seat and the lower edge of the first shielding plate, or wherein the positioning block is fixed on the fixing seat The locating pin is configured to hold the first shield plate stationary with the guide rail.
  9. 9. The test fixture of any one of claims 1-3, wherein the holder comprises a base and at least one adapter block, wherein, The adapter block is detachably arranged on the base, and one side, connected with the base, of the adapter block is matched with the base; the laser radar is arranged on the switching block, and one side, connected with the laser radar, of the switching block is matched with the laser radar.
  10. 10. The test fixture of claim 9, wherein the adapter block comprises a plurality of adapter blocks of different sizes, the plurality of adapter blocks of different sizes are adapted to different types of the lidar, so that when the different types of the lidar are fixed on the fixing base, optical axes of the different types of the lidar are located on the same horizontal plane.
  11. 11. A test fixture according to any one of claims 1-3, further comprising a second shutter movable relative to the holder in a second direction, the second shutter being arranged on a side of the window adjacent the lidar, the second shutter being configured to block part or all of the field of view of the lidar when moved in the second direction, the second direction being perpendicular to the first direction; When the second shielding plate shields part or all of the view field range of the laser radar, a part of the area of the second shielding plate shields at least part of detection light beams emitted by the laser radar.

Description

Test fixture Technical Field The disclosure relates to the technical field of laser radar testing, in particular to a testing tool. Background The laser radar detection precision is high, is little influenced by weather and environmental light, can realize all-weather and all-day high-precision detection, and has wide application in a plurality of fields such as automatic driving, field mapping, unmanned aerial vehicle detection and the like. In some application scenarios, the working environment of the lidar is harsh. For example, some lidars are used in outdoor environments, or windows of vehicle-mounted lidars or windshields of vehicles are polluted, so that the field of view of the lidar is blocked, and the detection accuracy of the lidar is affected. However, the corresponding testing device is lacking at present, and the detection performance of the laser radar under the condition that the field of view range is blocked cannot be tested. Disclosure of utility model Aiming at one or more defects in the prior art, the disclosure provides a test fixture for testing the detection performance of a laser radar. The test fixture comprises a fixed seat and a first shielding plate, wherein, The fixing seat fixes the laser radar in a preset pose; The first shielding plate can move along a first direction, the first shielding plate is arranged on one side close to a window of the laser radar, and the first shielding plate is configured to shield part or all of the view field range of the laser radar when moving along the first direction; When the first shielding plate shields part or all of the view field range of the laser radar, a part of the area of the first shielding plate shields at least part of detection light beams emitted by the laser radar. Optionally, the first direction is a vertical direction, and the first shielding plate is configured to shield part or all of a vertical field of view of the laser radar. Optionally, the first direction is a horizontal direction, and the first shielding plate is configured to shield part or all of a horizontal field of view of the laser radar. Optionally, the first shielding plate comprises a first shielding part, a second shielding part and a light transmission part, wherein, Along the first direction, the light transmission part is located between the first shading part and the second shading part, and in the process that the first shading plate moves along the first direction, the first shading part or the second shading part shields part or all of the view field range of the laser radar. Optionally, the light-transmitting part comprises a vacant structure or a light-transmitting material, and the size of the light-transmitting part can completely cover the field of view range of the laser radar. Optionally, the test fixture further includes a positioning member configured to keep the position of the first shielding plate in the first direction fixed. Optionally, the test fixture further includes a guide rail, the guide rail is disposed along the first direction, and the first shielding plate is configured to move along the guide rail relative to the fixing base. Optionally, the positioning piece comprises at least one of a positioning block and a positioning pin, two ends of the positioning block in the first direction are respectively abutted with the fixing seat and the lower edge of the first shielding plate, or the positioning pin is configured to enable the first shielding plate to be kept fixed with the guide rail. Optionally, the fixing base comprises a base and at least one adapter block, wherein, The adapter block is detachably arranged on the base, and one side, connected with the base, of the adapter block is matched with the base; the laser radar is arranged on the switching block, and one side, connected with the laser radar, of the switching block is matched with the laser radar. Optionally, the adapter includes a plurality of not unidimensional adapter, a plurality of not unidimensional adapter adaptation is different models the laser radar, so that different models when the laser radar is fixed on the fixing base, the optical axis of different models the laser radar is located same horizontal plane. Optionally, the test fixture further includes a second shielding plate, where the second shielding plate can move along a second direction relative to the fixing base, the second shielding plate is disposed on a side close to the window of the laser radar, and the second shielding plate is configured to shield part or all of a field of view of the laser radar when moving along the second direction, and the second direction is perpendicular to the first direction; When the second shielding plate shields part or all of the view field range of the laser radar, a part of the area of the second shielding plate shields at least part of detection light beams emitted by the laser radar. Compared with the prior art, the embodiment of the disclosure provides a