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LiDAR and its manufacturing method

A laser radar and wave light technology, applied in the field of photoelectric detection, can solve the problems of reducing the detection range, limiting the application of laser radar, shortening the detection distance of laser radar, etc. Effect

Active Publication Date: 2020-09-11
HESAI TECH CO LTD
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  • Description
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Problems solved by technology

[0005] However, the limitation of laser power will lead to the problem of shortening the detection distance and detection range of lidar, which greatly limits the application of lidar

Method used

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  • LiDAR and its manufacturing method
  • LiDAR and its manufacturing method
  • LiDAR and its manufacturing method

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Embodiment Construction

[0030] It can be seen from the background art that the lidar in the prior art that meets the human eye safety standard has the problems of too short a detection distance and a too small detection range. Now combine an existing laser radar to analyze the reasons for the small detection distance:

[0031] refer to figure 1 , shows a schematic diagram of the principle of a lidar.

[0032] Most of the existing laser radars adopt a separate arrangement of the emitting device and the detecting device. Moreover, in order to ensure the resolution of the laser radar, the transmitting device of the laser radar often includes a plurality of lasers 10 , that is, the laser radar is a multi-line laser radar.

[0033] Such as figure 1 As shown, the multi-line lidar includes a plurality of lasers 10 arranged in an array and a plurality of detectors 20 arranged in an array, and the plurality of detectors 20 corresponds to the plurality of lasers 10 one by one.

[0034] The working process ...

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Abstract

A laser radar and its manufacturing method, the laser radar not only reduces the energy density of the detection light in the plane perpendicular to the light propagation direction, but also improves the AEL of the laser radar by making the emission device and the detection device realize the mixed arrangement s.p.train In order to achieve the purpose of prolonging the lidar detection distance and expanding the lidar detection range; and to reduce the impact on the existing lidar optical path as much as possible, avoid increasing the volume of the lidar, in order to achieve the goal of controlling the production cost and process difficulty of the lidar Purpose. Therefore, the technical solution of the present invention can achieve both high integration and low process difficulty under the premise of ensuring high safety and large detection distance.

Description

technical field [0001] The invention relates to the field of photoelectric detection, in particular to a laser radar and a manufacturing method thereof. Background technique [0002] The current LiDAR (Light Detection And Ranging, LiDAR) uses a semiconductor laser to emit laser pulses and then records the reflected light to create a point cloud map of the LiDAR's surroundings. [0003] However, laser safety regulations in various countries limit the power of laser pulses. According to the standards of human eye safety, the judgment of laser safety level is carried out under the most stringent judgment conditions under its normal working conditions. When the lidar rotates, the horizontal distance between two adjacent pulses is related to the rotational speed. When the rotational speed is larger, the horizontal distance deviation caused by the rotation is larger. In this case, the strictest judgment is based on a specific frequency. There are three limits that need to be c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/481
CPCG01S7/481
Inventor 王瑞刘烨露吴世祥李娜向少卿李一帆
Owner HESAI TECH CO LTD
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