Laser transmitting and receiving scanning device and laser radar system

Abstract

The invention provides a laser transmitting and receiving scanning device and a laser radar system, relates to the technical field of laser radars, and aims to solve the problems that the size is difficult to reduce under the condition that the resolution is ensured, and the optical adjustment difficulty is high and the cost is high in the prior art. The laser receiving and transmitting scanning device comprises a receiving and transmitting optical fiber, the receiving and transmitting optical fiber is fixed by the fixing clamp and connected with a light beam shaping and collimating system, a one-dimensional galvanometer and a one-dimensional rotating mirror are arranged at an outlet of the light beam shaping and collimating system, and the one-dimensional galvanometer is used for receiving laser emitted by the light beam shaping and collimating system and reflecting the laser to the one-dimensional rotating mirror. According to the laser transmitting and receiving scanning device and the laser radar system provided by the invention, the size and the cost of the laser scanning device can be obviously reduced under the condition of ensuring the resolution, and the application range of the laser radar system is expanded; and in addition, the installation and adjustment difficulty can be reduced.

Description

technical field

[0001] The invention relates to the technical field of laser radar, in particular to a laser transceiver and scanning device and a laser radar system. Background technique

[0002] In autonomous driving technology, lidar is becoming an indispensable and important technical component, which is used as the "eyes" of the vehicle to perceive the environment. Distinguished from the principle of distance measurement, including pulse time-of-flight (TOF, Timeofflight) and continuous wave-based frequency-modulated continuous wave (FMCW, frequency-modulated continuous wave). FMCW-based lidar is limited by the coherence distance of the laser, and the current long-distance detection capability still needs to be improved. Considering that the field of autonomous driving requires a ranging capability of at least 100 meters, TOF lidar is still more widely used in this field.

[0003] From different optical-mechanical scanning structures, lidar can be divided into mechani...

Examples

Embodiment Construction

[0041] figure 1 It is a schematic structural diagram of a laser transceiver and scanning device provided by an embodiment of the present invention. like figure 1 As shown, the laser transceiver and scanning device provided in this embodiment includes a transceiver optical fiber 101, the transceiver optical fiber 101 is fixed by a fixing fixture 102, and is connected to a beam shaping and collimating system 103, and a one-dimensional galvanometer is provided at the exit of the beam shaping and collimating system 103 104 and a one-dimensional rotating mirror 105 , the one-dimensional galvanometer 104 is used to receive the laser light emitted by the beam shaping and collimating system 103 and reflect it to the one-dimensional rotating mirror 105 .

[0042]Specifically, the laser transceiving and scanning further includes a fixed base 106 on which the fixed fixture 102 , the beam shaping and collimating system 103 , the one-dimensional galvanometer 104 and the one-dimensional ro...

technical field

[0001] The invention relates to the technical field of laser radar, in particular to a laser transceiver and scanning device and a laser radar system. Background technique

[0002] In autonomous driving technology, lidar is becoming an indispensable and important technical component, which is used as the "eyes" of the vehicle to perceive the environment. Distinguished from the principle of distance measurement, including pulse time-of-flight (TOF, Timeofflight) and continuous wave-based frequency-modulated continuous wave (FMCW, frequency-modulated continuous wave). FMCW-based lidar is limited by the coherence distance of the laser, and the current long-distance detection capability still needs to be improved. Considering that the field of autonomous driving requires a ranging capability of at least 100 meters, TOF lidar is still more widely used in this field.

[0003] From different optical-mechanical scanning structures, lidar can be divided into mechani...

Examples

Embodiment Construction

[0041] figure 1 It is a schematic structural diagram of a laser transceiver and scanning device provided by an embodiment of the present invention. like figure 1 As shown, the laser transceiver and scanning device provided in this embodiment includes a transceiver optical fiber 101, the transceiver optical fiber 101 is fixed by a fixing fixture 102, and is connected to a beam shaping and collimating system 103, and a one-dimensional galvanometer is provided at the exit of the beam shaping and collimating system 103 104 and a one-dimensional rotating mirror 105 , the one-dimensional galvanometer 104 is used to receive the laser light emitted by the beam shaping and collimating system 103 and reflect it to the one-dimensional rotating mirror 105 .

[0042]Specifically, the laser transceiving and scanning further includes a fixed base 106 on which the fixed fixture 102 , the beam shaping and collimating system 103 , the one-dimensional galvanometer 104 and the one-dimensional ro...

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