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Intelligent detection front-end of point sound source localization system based on hemispherical microphone array

A technology of microphone array and positioning system, which is applied in positioning, radio wave measurement system, measuring device, etc. It can solve problems such as complex algorithm and detection height limit, and achieve the effects of high transmission efficiency, power saving, and convenient use

Inactive Publication Date: 2018-01-26
NORTHEAST GASOLINEEUM UNIV
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  • Claims
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AI Technical Summary

Problems solved by technology

The planar array algorithm is relatively simple, but is limited accordingly in terms of detection height
Stereo array positioning is more accurate, but the algorithm is more complex

Method used

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  • Intelligent detection front-end of point sound source localization system based on hemispherical microphone array
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  • Intelligent detection front-end of point sound source localization system based on hemispherical microphone array

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Embodiment Construction

[0021] Below in conjunction with accompanying drawing, the present invention will be further described:

[0022] Such as figure 1 As shown, the intelligent detection front-end of the point sound source localization system based on the hemispherical microphone array includes an STM32 processor, a sound source detection unit, a signal conditioning circuit, and a data transmission module. The microphones in the sound source detection unit are connected to the corresponding signal The conditioning circuit (that is, the single-channel signal processing circuit) has a total of 19 signal conditioning circuits, and the 19 signal conditioning circuits constitute a signal conditioning module. The 19 signal conditioning circuits are centrally powered by a single-cell lithium power supply, and each signal conditioning circuit Connected to the STM32 processor, the STM32 processor is connected to the data transfer module. The present invention takes the STM32 single-chip microcomputer as t...

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Abstract

The present invention relates to an intelligent detection front end of a point sound source localization system based on a hemispherical microphone array, which includes an STM32 processor, a sound source detection unit, a signal conditioning circuit, The data transmission module and the microphone in the sound source detection unit are connected to the corresponding signal conditioning circuit. Each signal conditioning circuit is powered by a single-cell lithium power supply. Each signal conditioning circuit is connected to the STM32 processor, and the STM32 processor is connected to the data transmission circuit. The module and the sound source detection unit adopt a hemispherical non-uniformly distributed microphone array, and the direction of each layer of microphones on the hemispherical surface is arranged along the normal direction from the center of the sphere to the point. The present invention collects noise information synchronously at different angles and azimuths in real time at multiple points for point sound sources, and synchronously normalizes the multi-point information, and the noise resolution reaches 0.1dB.

Description

technical field [0001] The invention relates to a point sound source detection and positioning technology, in particular to an intelligent detection front end of a point sound source positioning system based on a hemispherical microphone array. Background technique [0002] Microphone sound source localization technology uses a microphone to pick up voice signals, and uses digital signal processing technology to analyze and process them, and then determine and track the spatial position of the sound source. In the past, the microphone array method is usually used in speech signal processing. This method has the functions of denoising, sound source localization and tracking, etc., which can greatly improve the quality of speech signal processing. With the continuous development and maturity of microphone array technology in speech enhancement, noise suppression, sound source localization and echo cancellation, people have higher and higher requirements for the quality of micr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/18
CPCG01S5/18
Inventor 刘祥楼王晓东刘昭廷刘瑞男
Owner NORTHEAST GASOLINEEUM UNIV
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