System for testing light spots of laser radar

Abstract

The utility model discloses a system for testing light spots of a laser radar, which comprises a machine table, and a clamp, a light screening piece, a first light spot analyzer, a focusing lens and a second light spot analyzer are sequentially arranged on the machine table along a laser emission path. The light screening piece is movably arranged on the machine table and can penetrate through laser beams emitted by the multi-line laser radar one by one. The first light spot analyzer is movably arranged on the machine table and can move in or out of a laser emission path along the table top of the machine table; according to the utility model, mutual interference of laser beams emitted by the multi-line laser radar can be avoided, so that the test precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lidar test equipment, in particular to a system for testing lidar light spots. Background Art

[0002] With the development of science and technology and the wide application of computers and high technologies, digital stereo photogrammetry has gradually developed and matured, and lidar has emerged. Due to its powerful advantages, it plays an important role in fields such as driverless cars, driverless aircraft, 3D printing, VR / AR, and floor-sweeping robots. As a sensor that can accurately detect the position of an object, the accuracy of lidar is particularly important. Therefore, it is necessary to test the ranging performance of lidar.

[0003] Currently, the commonly used lidar is multi-line lidar, which can emit multiple laser beams. The more the number of laser beam lines, the greater the laser beam density and the higher the accuracy. Due to the divergence of laser beams, as the emission distance increases, the laser beams gradually diverge, and it is easy for the laser beams to interfere with each other, affecting the test accuracy of lidar. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a system for testing lidar light spots, which can avoid the interference between the laser beams emitted by multi-line lidar, thereby improving the test accuracy.

[0005] The purpose of the utility model is achieved by the following technical solutions:

[0006] A system for testing lidar light spots includes a machine table. Along the laser emission path on the machine table, a fixture, a light screening member, a first light spot analyzer, a focusing lens, and a second light spot analyzer are sequentially arranged. The light screening member is movably arranged on the machine table and can sequentially pass through the laser beams emitted by the multi-line lidar. The first light spot analyzer is movably arranged on the machine table and can move into or out of the laser emission path along the tabletop of the machine table.

[0007] Based on the above technical solutions, the utility model can be improved as follows:

[0008] Further, the light screening member includes a light shielding plate, and the plate surface of the light shielding plate is perpendicular to the laser beam. A light screening hole is opened on the light shielding plate, and one of the laser beams emitted by the multi-line lidar can pass through the light screening hole, while the other laser beams are blocked.

[0009] Further, the light screening member further includes a first electric connection seat arranged on the machine table. The first electric connection seat can move perpendicular to the laser emission path along the tabletop of the machine table, and the light shielding plate is fixedly connected to the first electric connection seat through a support frame.

[0010] Furthermore, the support frame includes a vertical rod and a horizontal rod. The bottom end of the vertical rod is connected to the first electric connection seat, and the top end of the vertical rod is perpendicularly connected to the horizontal rod to form an L-shaped structure. The light shielding plate is fixedly connected to the horizontal rod.

[0011] Furthermore, a second electric connection seat is arranged on the machine table. The second electric connection seat can move along the tabletop of the machine table perpendicular to the laser emission path, and the first light spot analyzer is installed on the second electric connection seat.

[0012] Furthermore, the fixture includes a base, electric fingers, and a cover plate. A receiving chamber is arranged on the base. The electric fingers are installed in the receiving chamber through a lateral opening on the base. A clamping plate is connected to one finger part of the electric fingers, and the clamping plate extends out of the base through the top opening of the base. The cover plate is fixedly installed at the top opening of the base, and a clamping part is arranged on the top of the cover plate. A clamping cavity corresponding to the shape of the multi-line lidar is formed on the top surface of the clamping part, and an avoidance groove for the clamping plate to enter the clamping cavity to laterally clamp the multi-line lidar is arranged on one side of the clamping cavity.

[0013] Compared with the prior art, the present utility model has the following advantages:

[0014] In the present utility model, a fixture, a light screening member, a first light spot analyzer, a focusing lens, and a second light spot analyzer are sequentially arranged along the laser emission path. The light screening member is movably arranged on the machine table and can sequentially pass through the laser beams emitted by the multi-line lidar to avoid mutual interference between the laser beams, so as to respectively obtain the optical parameters of each laser beam, thereby improving the test accuracy. At the same time, by moving the first light spot analyzer into or out of the laser emission path, the near-field optical parameters and far-field optical parameters can be obtained, so as to improve the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The following further describes the present utility model in detail with reference to the drawings and specific embodiments.

[0016] Figure 1 It is a schematic structural diagram of a system for testing the light spot of a lidar in the present utility model;

[0017] Figure 2 It is a schematic structural diagram of the light shielding plate installed on the first electric connection seat in the present utility model;

[0018] Figure 3 It is a schematic structural diagram of the first light spot analyzer installed on the second electric connection seat in the present utility model;

[0019] Figure 4 It is a schematic structural diagram of the fixture in the present utility model;

[0020] Figure 5 Schematic diagram of the base structure in the utility model;

[0021] Figure 6 Schematic diagram of the cover plate structure in the utility model.

[0022] Markings on the attached drawings: 1 - machine table, 2 - multi-line lidar, 3 - first spot analyzer, 4 - second spot analyzer, 5 - light-shielding plate, 5a - light-screening hole, 6 - first electric connection seat, 7 - second electric connection seat, 8 - support frame, 8a - vertical rod, 8b - cross bar, 9 - base, 9a - accommodating chamber, 10 - electric finger, 11 - cover plate, 11a - clamping part, 12 - clamping plate, 13 - focusing lens. Detailed implementation manners

[0023] The following further describes the detailed implementation manners of the present utility model in conjunction with the attached drawings. The description of these implementation manners is used to help understand the present utility model, but does not constitute a limitation to the present utility model. In addition, the technical features involved in the various implementation manners of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0024] See Figures 1 to 6 , the present utility model relates to a system for testing the spot of a lidar, including a machine table 1, and a fixture, a light-screening member, a first spot analyzer 3, a focusing lens 13 and a second spot analyzer 4 sequentially arranged on the machine table 1 along the laser emission path; wherein, the light-screening member is movably arranged on the machine table 1, and allows one of the laser beams emitted by the multi-line lidar 2 to pass through; the first spot analyzer 3 is movably arranged on the machine table 1, and can move into or out of the laser emission path along the tabletop of the machine table 1; the second spot analyzer 4 is fixedly arranged on the machine table 1; the focusing lens 13 is fixedly arranged on the machine table 1 and focuses the laser beam.

[0025] When the first spot analyzer 3 moves into the laser emission path, the laser beam passing through the light-screening member is received by the first spot analyzer 3 to obtain near-field optical parameters; when the first spot analyzer 3 moves out of the laser emission path, the laser beam passing through the light-screening member is focused by the focusing lens 13 and then received by the second spot analyzer 4 to obtain far-field optical parameters, and the near-field optical parameters and far-field optical parameters are used for testers to analyze the performance of the lidar.

[0026] Specifically, the light screening member includes a light shielding plate 5. The light shielding plate 5 is vertically arranged, and the plate surface of the light shielding plate 5 is perpendicular to the laser beam. A light screening hole 5a is provided on the light shielding plate 5. One of the laser beams emitted by the multi-line lidar 2 can pass through the light screening hole 5a for testing, and the remaining laser beams are blocked for testing. By moving the light shielding plate 5, the laser beam passing through the light shielding plate 5 can be switched. Since the laser beams emitted by the multi-line lidar are dense and prone to interference with each other during the emission process, the light shielding plate 5 in the embodiment can pass through the laser beams one by one to respectively obtain the optical parameters of each laser beam, thereby improving the test accuracy.

[0027] It should be noted that in this embodiment, the light shielding plate 5 is a rectangular plate structure. According to actual needs, it can also be a circular plate or a polygonal plate structure.

[0028] To facilitate the movement of the light shielding plate 5, the light screening member further includes a first electric connection seat 6 provided on the machine table 1. A support frame 8 is provided on the first electric connection seat 6. The support frame 8 includes a vertical rod 8a and a horizontal rod 8b. The bottom end of the vertical rod 8a is connected to the first electric connection seat 6, and the top end of the vertical rod 8a is perpendicularly connected to the horizontal rod 8b to form an L-shaped structure. The light shielding plate 5 is fixedly connected to the horizontal rod 8b. By controlling the first electric connection seat 6 to move along the table surface of the machine table 1 perpendicular to the laser emission path through an external controller, the light shielding plate 5 can be driven to move accordingly to complete the switching of the passing of each laser beam, thereby replacing manual movement of the light shielding plate 5 and improving the movement accuracy of the light shielding plate 5.

[0029] To facilitate the movement of the first light spot analyzer 3, a second electric connection seat 7 is provided on the machine table 1. The first light spot analyzer 3 is installed on the second electric connection seat 7. By controlling the second electric connection seat 7 to move along the table surface of the machine table 1 perpendicular to the laser emission path through an external controller, the first light spot analyzer 3 can be driven to move accordingly to complete the movement into or out of the laser emission path, thereby replacing manual movement of the first light spot analyzer 3 and improving the test efficiency.

[0030] It should be noted that in this embodiment, both the first electric connection seat 6 and the second electric connection seat 7 are translatable electric connection seats in the prior art, and the external controller in this embodiment is a servo controller in the prior art.

[0031] The fixture includes a base 9, an electric finger 10 and a cover plate 11. A receiving chamber 9a is provided on the base 9. The receiving chamber 9a forms a top opening at the top of the base 9 and a lateral opening on one side of the base 9. The electric finger 10 is installed in the receiving chamber 9a through the lateral opening on the base 9. A clamping plate 12 is connected to one of the finger parts of the electric finger 10. The clamping plate 12 extends out of the base 9 through the top opening of the base 9. The cover plate 11 is fixedly installed at the top opening of the base 9. A clamping part 11a is provided on the top of the cover plate 11. The top surface of the clamping part 11a forms a clamping cavity corresponding to the shape of the multi-line lidar 2. An avoidance groove is provided on one side of the clamping cavity for the clamping plate 12 to enter the clamping cavity to laterally clamp the multi-line lidar 2. When testing multi-line lidars 2 of different specifications, only the cover plate 11 with a clamping cavity corresponding to the shape of the tested multi-line lidar 2 needs to be replaced, and there is no need to replace the fixture as a whole, thus reducing the testing cost and improving the versatility of the fixture. In this embodiment, the electric finger 10 is a conventional electric finger 10 in the prior art.

[0032] The above embodiments of the present invention do not limit the protection scope of the present invention. The implementation manners of the present invention are not limited thereto. All such modifications, substitutions or changes made to the above structure of the present invention in various other forms according to the above content of the present invention, in accordance with the common general knowledge and conventional means in the art, without departing from the above basic technical idea of the present invention, shall fall within the protection scope of the present invention.

Claims

1. A system for testing lidar spots, comprising a machine platform, characterized in that, A fixture, a light screening member, a first spot analyzer, a focusing lens, and a second spot analyzer are sequentially arranged on the machine table along the laser emission path; the light screening member is movably arranged on the machine table and can sequentially pass through the laser beams emitted by the multi-line lidar; the first spot analyzer is movably arranged on the machine table and can move into or out of the laser emission path along the tabletop of the machine table.

2. The system for testing the laser radar spot according to claim 1, characterized in that, The light screening member includes a light shielding plate, and the plate surface of the light shielding plate is perpendicular to the laser beam; a light screening hole is formed in the light shielding plate, and one of the laser beams emitted by the multi-line lidar can pass through the light screening hole, and the remaining laser beams are blocked.

3. The system for testing the laser radar spot according to claim 2, wherein The light screening member further includes a first electric connection seat arranged on the machine table, the first electric connection seat can move perpendicular to the laser emission path along the tabletop of the machine table, and the light shielding plate is fixedly connected to the first electric connection seat through a support frame.

4. The system for testing the laser radar spot according to claim 3, wherein, The support frame includes a vertical rod and a horizontal rod, the bottom end of the vertical rod is connected to the first electric connection seat, the top end of the vertical rod is perpendicularly connected to the horizontal rod to form an L-shaped structure, and the light shielding plate is fixedly connected to the horizontal rod.

5. The system for testing the laser radar spot according to claim 2, characterized in that, A second electric connection seat is arranged on the machine table, the second electric connection seat can move perpendicular to the laser emission path along the tabletop of the machine table, and the first spot analyzer is installed on the second electric connection seat.

6. The system for testing the laser radar spot according to any one of claims 1-5, characterized in that, The fixture includes a base, electric fingers, and a cover plate. A receiving chamber is arranged on the base. The electric fingers are installed in the receiving chamber through a lateral opening on the base. A clamping plate is connected to one of the finger parts of the electric fingers, and the clamping plate extends out of the base through the top opening of the base; the cover plate is fixedly installed at the top opening of the base, and a clamping part is arranged on the top of the cover plate. A clamping cavity corresponding to the shape of the multi-line lidar is formed on the top surface of the clamping part, and an avoidance groove for the clamping plate to enter the clamping cavity laterally to clamp the multi-line lidar is arranged on one side of the clamping cavity.

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