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Laser radar and detection device thereof

A detection device and lidar technology, applied in the field of ranging, can solve the problems of increased volume, higher cost of lidar, and tight internal space.

Active Publication Date: 2019-10-18
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 detection device thereof
  • Laser radar and detection device thereof
  • Laser radar and detection device thereof

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 invention discloses a detection device of a laser radar, and the laser radar. The detection device of the laser radar comprises a plurality of laser emitters, an emitting lens assembly, a one-dimensional galvanometer, a receiving lens assembly and a photoelectric detector; the emitting lens assembly comprises a first reflector and a second reflector; the first reflector is used for reflectingdetection light beams emitted by the plurality of laser emitters to the one-dimensional galvanometer; the one-dimensional galvanometer is used for reflecting the detection light beams reflected by thefirst reflector; the second reflector is used for reflecting the detection light beams reflected by the one-dimensional galvanometer to a space to be detected; and the receiving lens assembly is suitable to receive echo light beams reflected by an obstacle in the space to be detected. While multi-wire-harness horizontal scanning is realized, the number of emitting-end lasers is reduced in a longitudinal galvanometer scanning mode, so that the difficulty of emitting-end space arrangement can be reduced.

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