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Method for passively positioning point sound source based on spatial ten-element array

A positioning method and point sound source technology, applied in the field of perception and testing, can solve the problems of sudden error, inability to locate and locate, and reduction of sensor nodes, and achieve the effects of reduced density, high positioning accuracy, and reduced cost

Inactive Publication Date: 2014-01-22
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0004] In order to solve the above problems, the present invention provides a method for passive sound localization of a point sound source based on a spatial ten-element array. The method obtains the pitch angle, azimuth angle and polar radius (sound path) of the sound source under spherical coordinates respectively, Then convert it into the coordinates in the XYZ rectangular coordinate system, which can simplify the solution process and avoid the above-mentioned situation of inability to locate or sudden change of positioning error due to the special position of the sound source, and when positioning in a large range, the density of the required sensor nodes is greatly increased. decrease, the accuracy is improved to a certain extent

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[0023] figure 1 It is a schematic diagram of the node layout of the spatial ten-element array of the point sound source passive sound localization method based on the spatial ten-element array of the present invention. Such as figure 1 As shown, the space ten-element array of the present invention includes 10 sensor nodes, and each node has an acoustic sensor, an acoustic signal trigger time acquisition device, corresponding processing and control circuits, power supply, and wired / wireless data transceiver modules, etc. The ten-element matrix consists of two parts: the central matrix and the peripheral matrix. The central matrix includes the first node, the second node, the third node, the fourth node, and the fifth node, and the peripheral matrix includes the Node, the 7th node, the 8th node and the 9th node; place the 0th node at the coordinate origin of the established XYZ Cartesian coordinate system, place the 7th node, the 3rd node, the 5th node, and the 9th node on the ...

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Abstract

The invention provides a method for passively positioning a point sound source based on a spatial ten-element array and belongs to the technical field of sensing and test. The method for passively positioning the point sound source comprises the following steps: calculating a corresponding arrival time difference through all the nodes of a central base array of the spatial ten-element array, and then utilizing the arrival time difference to calculate the pitch angle and the azimuth angle of the point sound source; calculating a corresponding arrival time difference through all the nodes of a peripheral base array of the spatial ten-element array, and then utilizing the arrival time difference to calculate the sonic path distance information of the point sound source; finally calculating the coordinates of the point sound source according to the obtained pitch angle, the azimuth angle and the sonic path distance information. The method for passively positioning the point sound source prevents the condition that the sound source cannot be positioned or a positioning error suddenly changes due to a special sound source position and has the advantages of high precision and strong practicability.

Description

technical field [0001] The invention belongs to the technical field of perception and testing, in particular to a point sound source passive sound localization method based on a spatial ten-element array. Background technique [0002] Existing passive acoustic positioning technologies are generally divided into three categories: (1) Steerable beamforming technology based on maximum output power; (2) High-resolution spectral estimation technology; (3) Time Difference of Arrival (TDOA) based technology. Arrival) positioning technology. Compared with the previous two methods, which are complex in theory and require a large amount of calculation, TDOA technology has the characteristics of simplicity, practicality, and small amount of calculation, and has been widely used. [0003] However, the traditional TDOA-based passive sound localization algorithm directly calculates the sound path difference Δr between the target and the two measurement elements according to the TDOA meas...

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Application Information

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IPC IPC(8): G01S5/22
CPCG01S5/22
Inventor 宋萍赵海磊崔林林武江鹏郝创博杨诚
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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