Information detection method and system
By using dual-channel laser signals and optical switching technology in the lidar system, frequency processing and frequency point analysis are carried out, accurate measurement of the velocity direction of the target object is achieved, and the problem that a single-channel laser cannot measure the velocity direction is solved, and the accuracy of information detection is improved.
CN120233330APending Publication Date: 2025-07-01WUHAN WANJI INFORMATION TECH
View PDF 0 Cites 0 Cited by
Patent Information
- Application Number
- CN202311872852.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-30
- Publication Date
- 2025-07-01
Smart Images
Figure CN120233330A_ABST
Abstract
The invention discloses an information detection method and system, and the method comprises the steps: dividing a first modulation optical signal into a first measurement path optical signal and a first reference path optical signal, and dividing a second modulation optical signal into a second measurement path optical signal and a second reference path optical signal; combining the first measurement path optical signal and the second measurement path optical signal into a detection path optical signal, transmitting the detection path optical signal into a specified space, and receiving an echo signal; combining the first reference path optical signal and a second reference path optical signal passing through the optical switch into a reference path optical signal, taking the reference path optical signal as a local oscillator signal, performing beat frequency processing on the reference path optical signal and the echo signal, analyzing the reference path optical signal to obtain a first frequency point and a second frequency point, and obtaining a second frequency point based on the first frequency point and the second frequency point; and a target speed measurement result and a target distance measurement result are determined, and the speed direction is determined in combination with the on / off time of the switch and the occurrence sequence of the frequency points.
Need to check novelty before this filing date? Find Prior Art