Bi-pentabasic cross-array passive acoustic location integrating method

A fusion method and cross-array technology, applied in positioning, electrical digital data processing, special data processing applications, etc., can solve the problems of accuracy reduction, ranging and lateral errors, unfavorable engineering applications, etc., to achieve the suppression of ranging and direction finding The impact of performance, the elimination of the impact of ranging and direction finding accuracy, and the effect of simple structure

Active Publication Date: 2014-12-24
HARBIN INST OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to propose a dual five-element cross array passive acoustic positioning fusion method to solve the problem that the orientation and range accuracy of the existing four-element cross array positioning method is related to the azimuth of the target, and it is impossible to judge which airspace the target is in; now The ranging and lateral errors of the five-element cross array still exist, especially when the angle between the target and the plane array is small, the ranging and lateral errors become larger, and some small distances are ignored when deriving the formula. A certain error, the accuracy of the estimate will drop, which is not conducive to the actual engineering application

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specific Embodiment approach 1

[0023] Specific embodiment 1: A dual five-element cross array passive sound localization fusion method according to the present invention, the microphone array model of the dual five element cross array passive sound is composed of 7 micro-microphones, S0, S1, S2, S3 , S4, S5, and S6 respectively represent the 7 microphones, which are located on the XYZ coordinate axis of the Cartesian coordinate system and are used to receive the sound signal from the sound source;

[0024] Let S0(0,0,0) be the reference microphone, and the other six microphones are located on the two planes XOY and XOZ, and the distances between the six microphones and the coordinate origin O are all D, such as figure 1 , the coordinates of each microphone can be expressed as: S1(D,0,0), S2(0,-D,0), S3(0,0,D), S4(-D,0,0), S5( 0,D,0), S6(0,0,-D);

[0025] Let the sound source P, the coordinates in the Cartesian coordinate system be (x, y, z), and the coordinates of the sound source P in the spherical coordin...

specific Embodiment approach 2

[0033] Specific embodiment two: the double five-element cross array is respectively located on two planes of the Cartesian coordinate system XOY and XOZ, wherein in the Cartesian coordinate system, four microphones S1, S2, S4, S5 in the XOY plane and S0 forms the first five-element cross array, and four microphones S1, S3, S4, S6 and S0 in the XOZ plane form the second five-element cross array in the Cartesian coordinate system.

specific Embodiment approach 3

[0034] Specific implementation mode three: the specific process of deriving the accurate calculation formula of the sound source point coordinates of the first five-element cross matrix located in the XOY plane described in step one is:

[0035] Assume that the coordinates of the sound source point in the first five-element cross array in the XOY plane are

[0036] Use the first five-element cross array to get the distance calculation formula between the sound source and the coordinate origin:

[0037] r 0 = ( τ 20 2 + τ 50 2 - τ 10 2 - ...

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Abstract

The invention relates to a bi-pentabasic cross-array passive acoustic location integrating method and belongs to the technical field of acoustic signal processing and measuring. The bi-pentabasic cross-array passive acoustic location integrating method solves the problems that orientation and distance accuracy of an existing quaternary cross-array location method are related to directions of targets, but which areas the targets are located are incapable of being judged, error exists in ranging and side direction of an existing pentabasic cross array, particularly when the targets and a planar array form small included angles, ranging and side direction error is large, some distances are ignored in formula derivation and resultantly some errors are caused, estimation accuracy is decreased and actual engineering application is damaged. The bi-pentabasic cross-array passive acoustic location integrating method is structured by seven microphones, accurate coordinate calculation formulas of sound source points are derived by two pentabasic cross arrays respectively, and a calculation formula of the sound source coordinate values is structured by introducing a weighted arithmetic average method by means of the calculation formulas of the pentabasic cross arrays. The bi-pentabasic cross-array passive acoustic location integrating method is applicable to the field of passive acoustic source location on basis of delay estimation.

Description

technical field [0001] The invention relates to a five-element cross array passive acoustic localization fusion method, in particular to a dual five-element cross array passive acoustic localization fusion method, which belongs to the technical field of sound signal processing and measurement. Background technique [0002] In the passive acoustic localization method, the effect of the beamforming method or the delay estimation method on the acoustic target localization performance is related to the microphone array form. Depending on the array design method, the obtained point sound source target localization performance is also different. Microphone array design can be divided into linear array, planar array and stereo array. The linear array can determine the two-dimensional parameters of the target, and the planar array can determine the three-dimensional parameters of the target. In the case of the same time delay estimation accuracy, the obtained point sound source tar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/22G06F19/00
CPCG01S5/22
Inventor 叶东路敬祎陈刚郭玉波
Owner HARBIN INST OF TECH
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