Laser radar and transmitting module, receiving module and detection method thereof

A technology of laser radar and detection method, which is applied in the direction of measuring device, utilization of re-radiation, re-radiation of electromagnetic waves, etc., can solve problems such as ranging errors, achieve the effects of avoiding crosstalk, reducing interference noise, and improving anti-interference ability

Active Publication Date: 2020-11-24
HESAI TECH CO LTD
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Problems solved by technology

However, the wavelengths of laser light emitted by each laser in the laser radar transmitting module are the same, and there may be crosstalk between multiple detectors activated at the same time, so that the detection unit in one detector may also receive signals from other simultaneously activated channel bands. Interference noise with the same wavelength from the source will cause ranging error

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  • Laser radar and transmitting module, receiving module and detection method thereof
  • Laser radar and transmitting module, receiving module and detection method thereof
  • Laser radar and transmitting module, receiving module and detection method thereof

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Embodiment Construction

[0045] In the laser radar, the laser beam is emitted by the transmitting module, and the laser beam (ie echo beam) reflected by the target is received by the receiving module. After the receiving module converts the optical signal of the echo beam into an electrical signal, After signal processing, 3D point cloud data can be obtained.

[0046] Preferably, the lasers in the transmitting module are at different positions of the transmitting focal plane, and the detectors in the receiving module are correspondingly at different positions of the receiving focal plane. Therefore, the lasers can emit light beams at different angles to the outside world, and the detectors can Receive the light beams reflected from different angles from the outside world, so as to realize space measurement at different angles.

[0047] As another preferred solution, an aperture can be set on the receiving focal plane to filter out stray light, and detectors can be installed downstream along the optica...

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Abstract

The invention discloses a laser radar and a transmitting module, a receiving module and a detection method thereof, the transmitting module of the laser radar comprises a plurality of lasers, the light emitting wavelengths of the lasers comprise a first wavelength and a second wavelength, and the lasers suitable for emitting light at the same time have different light emitting wavelengths; the receiving module of the laser radar comprises a plurality of detectors, and each detector is suitable for receiving an echo light beam, reflected by a target object, of a laser beam emitted by a corresponding laser in an emission module. By adopting the scheme, the anti-interference capability among a plurality of detectors can be improved, and the signal receiving performance of the laser radar canbe effectively guaranteed.

Description

technical field [0001] The embodiments of this specification relate to the technical field of laser radar, and in particular, to a transmitting module, a receiving module, a related control method, and laser radar. Background technique [0002] In the laser radar, the laser beam (that is, the detection beam) is emitted by the transmitting module, and the laser beam (that is, the echo beam) reflected by the target is received by the receiving module, and the optical signal of the echo beam is converted by the receiving module After being an electrical signal, three-dimensional point cloud data can be obtained after signal processing. [0003] Among them, the lasers in the transmitting module are at different positions of the transmitting focal plane, and the detectors in the receiving module are correspondingly at different positions of the receiving focal plane. Therefore, the lasers can emit light beams at different angles to the outside world, and the detectors can receive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/481G01S17/42
CPCG01S7/4811G01S17/42Y02A90/10
Inventor 刘兴伟孙恺朱雪洲向少卿
Owner HESAI TECH CO LTD
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