Title:
EMERGENCY POSITIONING METHOD AND SYSTEM BASED ON CORRECTION OF MULTI-MODAL ACOUSTIC SIGNALS
Document Type and Number:
WIPO Patent Application WO/2024/098457
Kind Code:
A1
Abstract:
An emergency positioning method and system based on correction of multi-modal acoustic signals. The method comprises: determining sensor parameters of at least two positioning base stations, and calculating an acoustic signal flight speed (106); determining an initial acoustic signal on the basis of the acoustic signal flight speed, and calculating a target acoustic signal according to the initial acoustic signal and a preset signal estimation model (102); on the basis of the initial acoustic signal and the target acoustic signal, obtaining the time of flight of the target acoustic signal reaching a terminal to be positioned (104); determining the position of each positioning base station, and obtaining, according to the positions of all positioning base stations, all acoustic signal flight speeds, and all times of flight, a design matrix corresponding to the terminal to be positioned (108); and on the basis of the design matrix, calculating coordinates of the terminal to be positioned (110). According to the described means, the impact of severe and complex environments on distance measurement precision by a positioning system is overcome, environmental noise sensitivity generally existing in TDOA positioning in a large underground space can be reduced, and positioning robustness and usability of an emergency system are greatly improved.
Inventors:
WANG ZHI (CN)
XUE CAN (CN)
XU DONGYANG (CN)
CAI SHENGSHENG (CN)
XUE CAN (CN)
XU DONGYANG (CN)
CAI SHENGSHENG (CN)
Application Number:
PCT/CN2022/133103
Publication Date:
May 16, 2024
Filing Date:
November 21, 2022
Export Citation:
Assignee:
HUZHOU INSTITUTE OF ZHEJIANG UNIV (CN)
International Classes:
G01S5/26
Foreign References:
| CN113873429A | 2021-12-31 | |||
| CN110087308A | 2019-08-02 | |||
| CN112098947A | 2020-12-18 | |||
| CN114415115A | 2022-04-29 | |||
| US20140112104A1 | 2014-04-24 |
Attorney, Agent or Firm:
SHANGHAI XINLONG INTELLECTUAL PROPERTY AGENCY (GENERAL PARTNERSHIP) (CN)
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