Laser ranging method, system, device and medium based on multi-phase delay sampling

By using a multi-phase delay sampling method, a trigger signal for a discrete phase gradient is generated using an RC delay array. This signal drives the laser emitting unit to emit pulses in stages and reconstructs the echo characteristics. This solves the problem of insufficient measurement accuracy caused by excessively large sampling intervals in existing laser ranging systems and achieves higher accuracy ranging results.

CN122110136BActive Publication Date: 2026-07-07SNDWAY TECH (GUANGDONG) CO LTD
View PDF 2 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SNDWAY TECH (GUANGDONG) CO LTD
Filing Date
2026-04-27
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

Existing laser ranging systems are limited by the sampling frequency of the hardware physical characteristics, resulting in excessively large sampling intervals of the echo signal in the spatial dimension. This makes it difficult to capture subtle changes in the echo signal, leading to insufficient measurement accuracy and resolution.

Method used

A multi-phase delay sampling method is adopted. By configuring an RC delay array to generate a trigger branch signal with a preset discrete phase gradient, the laser emitting unit emits laser detection pulses in sequence at different sub-phase times. Multiple initial echo sequences are acquired using a synchronized sampling clock, and the synthetic echo characteristics with equivalent sampling rate enhancement are reconstructed for time-of-flight calculation.

Benefits of technology

It significantly improves measurement accuracy and resolution, effectively compensates for the performance shortcomings of traditional solutions in long-distance or high-precision scenarios, reduces quantization bias, and achieves higher-dimensional measurement accuracy.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122110136B_ABST
    Figure CN122110136B_ABST
Patent Text Reader

Abstract

The present application relates to the technical field of laser ranging, and particularly relates to a laser ranging method, system, device and medium based on multi-phase delay sampling, wherein the method comprises: inputting a generated reference trigger signal into an RC delay array in parallel to generate a plurality of trigger branch signals; driving a laser emitting unit to emit laser detection pulses by using the plurality of trigger branch signals; receiving a return signal and obtaining a plurality of initial return sequences by using a sampling clock; rearranging and mapping the plurality of initial return sequences into a time domain coordinate system to perform time domain registration and fusion, reconstructing a synthesized return feature, and calculating a time of flight to determine target ranging information. Thus, the present application guides multi-cycle sampling in batches, and fills sampling points of different phases into gaps of a sampling period according to a time sequence rearrangement logic to reconstruct a high-resolution synthesized return, so that quantization deviation is effectively eliminated and ranging resolution is significantly enhanced without improving a hardware native sampling frequency.
Need to check novelty before this filing date? Find Prior Art