Object position detection method and laser radar

By dividing the outgoing light into an outgoing wave signal and a local oscillator signal in the lidar and interfering to calculate the angle, the problem that traditional lidar cannot accurately obtain the detection field of view azimuth information, and the precise measurement of the detected target azimuth information is achieved, and the applicability of the equipment is improved.

CN111505654BActive Publication Date: 2025-03-21SUTENG INNOVATION TECHNOLOGY CO LTD
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Patent Information

Application Number
CN201910092047.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2019-01-30
Publication Date
2025-03-21
Estimated Expiration
2039-01-30

AI Technical Summary

Technical Problem

In the process of detecting object distance information through laser beams, traditional lidar cannot accurately obtain the orientation information of the detection field of view, resulting in low applicability.

Method used

By dividing the emitted light into an outgoing wave signal and a local oscillator signal, and projecting the local oscillator signal to the detector at a preset angle, it interferes with the echo signal before the detector, forming an interference signal. Then, based on the light intensity parameters of the echo signal, the local oscillator signal and the interference signal, the angle between the local oscillator signal and the echo signal is calculated, thereby determining the orientation information of the detected target.

Benefits of technology

It realizes accurate measurement of the orientation information of the detected target, meets the detection needs of the orientation of different scenarios, and improves the applicability of the lidar.

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Abstract

The present invention relates to an object position detection method and a laser radar. The method includes: generating an outgoing light and dividing the outgoing light into an outgoing wave signal and a local oscillator signal; emitting the outgoing wave signal outward; receiving an echo signal reflected by a detected target and projecting it to a detector; projecting the local oscillator signal to the detector at a preset angle so that the local oscillator signal and the echo signal interfere with each other before reaching the detector to form an interference signal and then project it to the detector; obtaining a first light intensity parameter of the echo signal; obtaining a second light intensity parameter of the local oscillator signal; obtaining a third light intensity parameter of the interference signal; determining the angle between the local oscillator signal and the echo signal according to the first light intensity parameter, the second light intensity parameter and the third light intensity parameter; and determining the azimuth information of the detected target according to the angle. The azimuth information of the detected target can be accurately determined by the above method.
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