一种激光探测装置及方法
By combining dual-wavelength positive and negative dual-chirped lasers and processing complex signals, the problem of velocity measurement accuracy degradation caused by the Doppler broadening effect in rotary scanning is solved, achieving high-precision velocity measurement and optimized ranging, which is suitable for laser coherent detection scenarios with Doppler broadening.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HANGZHOU LUOWEI TECH CO LTD
- Filing Date
- 2026-05-11
- Publication Date
- 2026-07-17
AI Technical Summary
In existing rotating vibrating scanning lidar, the Doppler broadening effect introduced by the high-speed rotating mirror leads to a decrease in signal-to-noise ratio and a deterioration in velocity measurement accuracy, becoming a major limiting factor for the application of high-precision coherent lidar.
A dual-wavelength positive and negative dual-chirped laser is used, which is split into emitted light and local oscillator light by a beam splitting module. A coherent mixing module generates orthogonal beat frequency signals, and a signal processing module performs product subtraction and addition operations to construct complex signals, thereby eliminating Doppler broadening interference and realizing real-time speed measurement.
It significantly improves velocity measurement accuracy, eliminates the impact of Doppler broadening on velocity measurement, and optimizes ranging accuracy. It is suitable for rotary scanning and other laser coherent detection scenarios where Doppler broadening exists.
Smart Images
Figure CN122151102B_ABST