Large-scale acousto-optic fusion positioning method

By using an acoustic-optical fusion positioning method in complex environments, combined with weighted least squares calculation of acoustic and optical measurement points, the problem of high-precision and reliable positioning of targets in large areas was solved, and rapid and efficient positioning with fewer measurement points was achieved.

CN116859340BActive Publication Date: 2026-06-09NORTHWEST INST OF NUCLEAR TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NORTHWEST INST OF NUCLEAR TECH
Filing Date
2023-07-07
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing target location methods are difficult to achieve high-precision measurement and reliable positioning over large areas using fewer measurement points in complex environments such as sandstorms, dense fog, or smoke interference.

Method used

A large-scale acoustic-optical fusion localization method is adopted. By deploying at least one acoustic measurement point and one optical measurement point in a safe area, the target direction and the time of event occurrence are obtained. The target position is calculated by combining the weighted least squares method and the acoustic and optical measurement results are fused.

Benefits of technology

It achieves high-precision measurement and reliable positioning of large-area targets in complex environments, while also providing efficient positioning with fewer measurement points. It is suitable for positioning targets such as explosion points and impact points, and its deployment method is flexible, with fast and efficient calculation.

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Abstract

The application provides a large-scale sound-light fusion positioning method, which solves the technical problems that the existing target position positioning method is difficult to consider both high-precision measurement of a large-area target position with fewer measuring points and reliable positioning of the large-area target position in a complex environment such as sand and thick fog. The positioning method comprises the following steps: arranging at least one acoustic measuring point and at least one optical measuring point in a safe area; the acoustic measuring point acquires a target direction and a sound wave arrival time, and the optical measuring point acquires a target direction and an event occurrence time; taking the event occurrence time as a reference time, the time of the sound wave propagating from the target position to the acoustic measuring point is obtained, and the distance from the acoustic measuring point to the target is calculated; and the target position is calculated by using a weighted least square method. The application can meet the demand for high-precision measurement and realize large-scale measurement of kilometers, and considers both high-precision measurement with fewer measuring points and reliable positioning in a complex environment.
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