A laser radar scanning method and computer readable storage medium

Through two-stage light deflection technology and working voltage regulation methods, the problem of lidar system in improving detection distance and meeting vehicle navigation needs is solved, and efficient long-distance and large-field-of-view range detection is achieved.

CN118962690BActive Publication Date: 2025-03-21SHENZHEN FUSHI TECH CO LTD +1
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Patent Information

Application Number
CN202411448850.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-10-17
Publication Date
2025-03-21
Estimated Expiration
2044-10-17

AI Technical Summary

Technical Problem

Existing lidar systems are difficult to increase detection distances to hundreds of meters without changing frame rates, scanning angles and angular resolutions, especially when meeting vehicle navigation and obstacle avoidance needs.

Method used

Using a two-stage light deflection technology, the light beam is deflected multiple times through the first light deflection device and the second light deflection device, and the deflection angle is adjusted in combination with controlling the operating voltage applied to the second light deflection device, and the voltage is fine-tuned according to the beam incident angle to optimize the diffraction efficiency.

Benefits of technology

It realizes that the detection distance and frame rate of lidar are improved without increasing system cost and reliability risks, and meets the detection needs of long-distance and large field of view ranges.

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Abstract

The present invention discloses a laser radar scanning method and a computer-readable storage medium. The method comprises: a first light deflection device deflects a light beam emitted by a light source by a plurality of first deflection angles along a first direction; the length of the light beam emitted by the light source along the first direction is less than the length along a second direction; a second light deflection device deflects the light beam deflected by the first light deflection device by a plurality of second deflection angles along a first direction and a second direction to project a scanning light beam; the length of the scanning light beam in the first direction is less than its length in the second direction; the second deflection angle of the incident light beam deflected by the second light deflection device is adjusted by controlling the working voltage applied to the second light deflection device, and the corresponding working voltage applied is fine-tuned according to the incident angle of the light beam incident on the second light deflection device; wherein, for the same second deflection angle, different incident angles correspond to different working voltages.
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