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Method and system for locating three-dimensional space sound source

A three-dimensional space, sound source positioning technology, applied in positioning, radio wave measurement system, measuring device, etc., can solve problems such as no technical solutions

Active Publication Date: 2017-01-04
WUHAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Only through timely judgment can emergency measures be taken in time, but there is no relevant technical solution yet

Method used

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  • Method and system for locating three-dimensional space sound source
  • Method and system for locating three-dimensional space sound source
  • Method and system for locating three-dimensional space sound source

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Embodiment Construction

[0076] The technical solution of the present invention will be described below in conjunction with the accompanying drawings.

[0077] Step 1, setting up a microphone group including multiple microphones, and estimating the distance of the sound source using the sound source signals recorded by the multiple microphones;

[0078] The microphone group includes more than three microphones. The preferred solution is adopted in the embodiment, and three microphones are set for recording. The greater the number of microphones, the more accurate they are, at the expense of a corresponding increase in cost and complexity. There are many methods for estimating the distance of the sound source, such as the estimation method of the direct-inverse ratio in the prior art, first select a microphone with the smallest distance from other microphones, separate its direct sound and echo, and separate the direct sound and reflected sound by calculating the energy ratio , to estimate the sound s...

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Abstract

The invention provides a method and system for locating a three-dimensional space sound source. The method includes the steps that a microphone set comprising a plurality of microphones is arranged, the plurality of microphones are utilized respectively to record sound source signals to estimate the distance of the sound source; the microphones are combined in pairs, any two microphones are taken as a microphone pair, the angle of the sound source between the two microphones is calculated for each microphone pair, and the azimuth angle of the sound source between the two microphones is obtained; for each microphone pair, combined with the sound source distance obtained from estimation, the position of a virtual sound source in three-dimensional space is determined; an observation point is selected, orthogonal decomposition is carried out on virtual sound sources determined by all the microphones, horizontal angles and elevating angles of the sound sources are calculated, and the three-dimensional space position of the sound source is determined. By means of the method, the three-dimensional space position and size of the sound source are obtained in real time, and a reliable technical scheme of locating for sounding objects in non-visible areas in the field of security monitoring, robots and the like is provided.

Description

technical field [0001] The invention belongs to the field of acoustic processing, and in particular relates to a three-dimensional sound source positioning method and system. Background technique [0002] In the application of security monitoring, it is necessary to catch the occurrence of emergencies at any time, and only by obtaining useful information around in a timely and accurate manner and making accurate judgments can quick and effective emergency measures be taken. [0003] Traditional security applications mainly rely on monitoring image content to judge, which requires specialized personnel to check each monitoring point, and it is impossible to detect emergencies that occur outside the monitoring range. The ideal situation is that in the case of no one on duty, professionals with their eyes closed, monitoring blind spots, etc., it can automatically realize the early warning of emergencies, and the relevant monitoring personnel can quickly locate the location of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/22
CPCG01S5/22
Inventor 王恒张聪郭峰林
Owner WUHAN POLYTECHNIC UNIVERSITY
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