Iteration positioning method based on sound position fingerprint

Abstract

The invention provides an iteration positioning method based on a sound position fingerprint and relates to the technical field of determination of positions of signal sources by applying sound waves.The method is a scene analysis method, takes sound arrival time as positioning accuracy of a position fingerprint and comprises two steps of: A. offline acquisition: i.e., an offline acquisition stage of the sound position fingerprint: acquiring a two-dimensional space coordinate, constructing a sound position fingerprint database, carrying out clustering on the sound position fingerprint database by use of a clustering method based on the sound position, and forming K clustering centers by use of the cluster 1, the cluster 2, ..., and the cluster K; and B. online positioning: i.e., an onlinepositioning stage of the sound position fingerprint: extracting sound position characteristic vector of a to-be-positioned sound source, selecting the clusters and carrying out iteration positioningthrough a computer, i.e., carrying out position calculation of the to-be-positioned sound source and carrying out result positioning, i.e., outputting the final positioning result of the to-be-positioned sound source. According to the invention, defects of high dependency on models of the current sound source positioning method and low positioning precision of nonstructural space are overcome.

Description

technical field [0001] The technical scheme of the present invention relates to the technology of determining the position of the signal source by using sound waves, specifically, an iterative positioning method based on sound position fingerprints. Background technique [0002] With the advancement of Internet technology and the portable development of mobile devices, the demand for services based on location information is also increasing. The development of outdoor positioning technologies such as GPS has been relatively mature, and it has been widely used in outdoor navigation, satellite monitoring and other fields. It is of great significance to provide users with accurate and fast positioning services. However, the penetrating ability of GPS signal is weak, and it is easily affected by the refraction and reflection of buildings, so it is difficult to achieve accurate positioning in complex indoor environments. Therefore, it is imperative to find a fast, accurate and t...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide an iterative positioning method based on the sound position fingerprint, which is a scene analysis method, adopts a large-scale distributed microphone array, and uses the sound arrival time difference as the positioning accuracy of the position fingerprint, which overcomes the existing sound source The defects of high model dependence of positioning method and low positioning accuracy in unstructured space

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