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Laser radar and its detection device

A detection device and lidar technology, applied in the field of ranging, can solve the problems of increasing difficulty in the spatial arrangement of the transmitting end, tight internal space, and increased cost of lidar, so as to facilitate independent maintenance, reduce space, and facilitate independent upgrades Effect

Active Publication Date: 2022-05-06
HESAI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The increasing number of channels may increase the cost of lidar, the internal space will be tight, the volume will increase, and the difficulty of spatial arrangement at the transmitter will increase

Method used

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  • Laser radar and its detection device
  • Laser radar and its detection device
  • Laser radar and its detection device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1 may include a laser radar detection device, including a plurality of laser emitters, a transmitting lens assembly, a one-dimensional vibrating mirror, a receiving lens assembly, and a photodetector; the transmitting lens assembly includes: a first reflector and a second Two mirrors;

[0051] The first mirror is used to reflect the detection beams emitted by the plurality of laser emitters to the one-dimensional vibrating mirror;

[0052] The one-dimensional galvanometer includes a reflective surface for reflecting the detection beam reflected by the first reflector, and the rotation axis of the one-dimensional galvanometer is perpendicular to the vertical direction;

[0053] The second mirror is used to reflect the detection beam reflected by the one-dimensional galvanometer to the space to be measured;

[0054] The receiving lens assembly is adapted to receive an echo beam reflected by an obstacle in the space to be measured, wherein the echo beam is a de...

Embodiment 2

[0056] Embodiment 2 may include the lidar detecting device described in Embodiment 1, and the plurality of laser emitters are distributed along the vertical direction.

Embodiment 3

[0057] Embodiment 3 may include the lidar detection device described in Embodiment 2, the plurality of laser emitters are distributed in two rows parallel to each other along the vertical direction, and the two rows of laser emitters are arranged alternately.

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Abstract

The application discloses a laser radar detection device and the laser radar. The detection device of the laser radar in the present application includes: a plurality of laser transmitters, a transmitting lens assembly, a one-dimensional vibrating mirror, a receiving lens assembly and a photoelectric detector; the transmitting lens assembly includes: a first reflector and a second reflector; A mirror is used to reflect the detection beams emitted by multiple laser transmitters to the one-dimensional galvanometer; the one-dimensional galvanometer is used to reflect the detection beams reflected by the first mirror; the second mirror is used to The detection beam reflected by the one-dimensional vibrating mirror is reflected to the space to be measured; the receiving lens assembly is suitable for receiving the echo beam reflected by the obstacle in the space to be measured. In the present application, while realizing multi-line beam horizontal scanning, the number of lasers at the transmitting end is reduced by means of vertical galvanometer scanning, thereby reducing the difficulty of spatial arrangement at the transmitting end.

Description

technical field [0001] The present application relates to the field of ranging, in particular to a laser radar and a detection device thereof. Background technique [0002] LiDAR is a general term for laser active detection sensor equipment. Its working principle is as follows: the transmitter of the laser radar emits a laser beam. After the laser beam encounters an object, it returns to the laser receiver after diffuse reflection. The module can calculate the distance between the laser radar and the object according to the time interval of sending and receiving the laser beam multiplied by the speed of light, and then divided by 2. [0003] The current multi-line lidar is a one-to-one transceiver channel. For example, a 32-line radar requires 32 pairs of transmitting light sources and receiving channels. Moreover, the rotary scanning lidar has a trend of increasing longitudinal (vertical) field of view and more and more scanning beams. This development trend requires more...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S17/08G01S7/481
CPCG01S17/08G01S7/4817
Inventor 穆永吉陈杰向少卿
Owner HESAI TECH CO LTD