CN-116953713-B - Laser receiving and transmitting structure and laser radar

CN116953713BCN 116953713 BCN116953713 BCN 116953713BCN-116953713-B

Abstract

The embodiment of the invention provides a laser receiving and transmitting structure and a laser radar, wherein the laser receiving and transmitting structure comprises a load, a first laser transmitting module, a second laser transmitting module and a laser receiving module, the first laser transmitting module and the second laser transmitting module comprise a plurality of lasers which are distributed along a first direction, the first laser transmitting module and the second laser transmitting module are used for transmitting laser beams to a detected object, the first laser transmitting module and the second laser transmitting module are correspondingly arranged on the load so that view fields of the first laser transmitting module and the second laser transmitting module in the first direction are mutually spliced along the first direction, and the laser receiving module is correspondingly arranged on the load and is used for receiving echo signals generated by reflection of the detected object. In the technical scheme of the invention, the laser receiving and transmitting structure has ingenious structural design, simple structure and low cost, and can realize wide-angle detection.

Inventors

HOU CHENGXIN
HU PANPAN
YANG KUN
Feng aokai

Assignees

武汉万集光电技术有限公司

Dates

Publication Date: 20260508
Application Date: 20220415

Claims (8)

1. The laser receiving and transmitting structure is characterized by comprising a load, a first laser transmitting module, a second laser transmitting module and a laser receiving module; The first laser emission module and the second laser emission module comprise a plurality of lasers which are arranged at intervals along a first direction, the lasers in the second laser emission module and the lasers in the first laser emission module are staggered in sequence along the first direction, the first laser emission module and the second laser emission module are both used for emitting laser beams to a detected object, the first laser emission module and the second laser emission module are positioned on the same side of the laser receiving module along the first direction, and the optical axis of the first laser emission module and the optical axis of the second laser emission module are respectively positioned on two sides of the optical axis of the laser receiving module along the direction perpendicular to the first direction; the first laser emission module and the second laser emission module are correspondingly arranged on the load, so that the view fields of the first laser emission module and the second laser emission module in the first direction are spliced with each other along the first direction; The laser receiving module is arranged on the load corresponding to the first laser transmitting module and the second laser transmitting module, and is used for receiving echo signals generated by reflecting laser beams of the first laser transmitting module and the second laser transmitting module by the detected object.
2. The laser transmitter-receiver structure of claim 1, wherein the distance between two adjacent lasers in the first laser transmitting module in the first direction is 0.2mm-0.5mm, and/or, The distance between two adjacent lasers in the second laser emission module in the first direction is 0.2mm-0.5mm.
3. The laser transceiver structure of any one of claims 1-2, wherein the first laser emitting module comprises a first emitting circuit board, and the laser in the first laser emitting module is arranged on a board surface of the first emitting circuit board facing the load; The second laser emission module comprises a second emission circuit board, and a laser in the second laser emission module is arranged on the second emission circuit board towards the surface of the load; the laser receiving and transmitting structure further comprises a control circuit board, the control circuit board is electrically connected with the first transmitting circuit board and the second transmitting circuit board, one end of the control circuit board is inserted into one end of the load, which is close to the first transmitting circuit board, and one ends of the first transmitting circuit board and the second transmitting circuit board are both inserted into the same board surface of the control circuit board.
4. The laser transmitter-receiver structure of claim 3, wherein said first transmitting circuit board and said second transmitting circuit board are integrally formed and/or, The laser receiving module comprises a receiving circuit board, wherein the receiving circuit board is electrically connected with the control circuit board, and one end of the receiving circuit board is inserted into the control circuit board and is far away from the board surface of the first transmitting circuit board.
5. The laser transmitter-receiver structure of any of claims 1-2, wherein said laser is a vertical cavity surface emitting laser.
6. The laser transceiver structure of any one of claims 1-2, wherein the laser receiving module comprises a plurality of detectors arranged along the first direction, and the detectors in the laser receiving module are arranged in one-to-one correspondence with the lasers.
7. A lidar comprising a laser transceiver structure according to any of claims 1-6.
8. The lidar of claim 7, wherein a plurality of the laser transceiving structures are provided, and wherein fields of view of the plurality of the laser transceiving structures in a first direction are stitched to each other along the first direction.

Description

Laser receiving and transmitting structure and laser radar Technical Field The invention relates to the technical field of radars, in particular to a laser receiving and transmitting structure and a laser radar. Background The working principle of the laser radar is that a detection laser beam is emitted to a detected object, then a reflected echo signal reflected by an obstacle is detected and compared with the emitted laser signal in time, and target object information such as distance, azimuth and the like can be obtained after proper processing. The smaller the laser radar volume is, the more beneficial to popularization, and the laser radar is required to have a larger field angle in some application scenes. Disclosure of Invention The embodiment of the invention provides a laser receiving and transmitting structure and a laser radar, and aims to design the laser radar which can realize wide-angle detection and has a simple structure. The invention provides a laser receiving and transmitting structure, which comprises a load, a first laser transmitting module, a second laser transmitting module and a laser receiving module; the first laser emission module and the second laser emission module comprise a plurality of lasers which are arranged along a first direction, and the first laser emission module and the second laser emission module are used for emitting laser beams to the detected object; the first laser emission module and the second laser emission module are correspondingly arranged on the load, so that the view fields of the first laser emission module and the second laser emission module in the first direction are spliced with each other along the first direction; The laser receiving module is arranged on the load corresponding to the first laser transmitting module and the second laser transmitting module, and is used for receiving echo signals generated by reflecting laser beams of the first laser transmitting module and the second laser transmitting module by the detected object. In a specific embodiment, the lasers in the first laser emission module are arranged at intervals along the first direction, the lasers in the second laser emission module are arranged at intervals along the first direction, and the lasers in the second laser emission module and the lasers in the first laser emission module are staggered in sequence along the first direction. In a specific embodiment, the distance between two adjacent lasers in the first laser emitting module in the first direction is 0.2mm-0.5mm. In a specific embodiment, the distance between two adjacent lasers in the second laser emitting module in the first direction is 0.2mm-0.5mm. In a specific embodiment, the first laser emission module includes a first emission circuit board, and the laser in the first laser emission module is disposed on a board surface of the first emission circuit board facing the load; The second laser emission module comprises a second emission circuit board, and a laser in the second laser emission module is arranged on the second emission circuit board towards the surface of the load; the laser receiving and transmitting structure further comprises a control circuit board, the control circuit board is electrically connected with the first transmitting circuit board and the second transmitting circuit board, one end of the control circuit board is inserted into one end of the load, which is close to the first transmitting circuit board, and one ends of the first transmitting circuit board and the second transmitting circuit board are both inserted into the same board surface of the control circuit board. In a specific embodiment, the first transmitting circuit board and the second transmitting circuit board are integrally formed. In a specific embodiment, the laser receiving module includes a receiving circuit board, the receiving circuit board is electrically connected to the control circuit board, and one end of the receiving circuit board is inserted into the control circuit board and is far away from the board surface of the first transmitting circuit board. In a specific embodiment, the laser is a vertical cavity surface emitting laser. In a specific embodiment, the laser receiving module includes a plurality of detectors arranged along the first direction, and the detectors in the laser receiving module are arranged in a one-to-one correspondence with the lasers. In a specific embodiment, the first laser emission module and the second laser emission module are located on the same side of the laser receiving module in the first direction, and the optical axis of the first laser emission module and the optical axis of the second laser emission module are located on two sides of the optical axis of the laser receiving module in a direction perpendicular to the first direction respectively. The invention also provides a laser radar which comprises the laser receiving and transmitting structure. In a specific embodim