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Point sound source positioning system intelligent detecting front-end based on semispherical microphone array

A technology of microphone array and positioning system, applied in positioning, radio wave measurement system, measurement device and other directions, can solve the problems of detection height limitation and complex algorithm, and achieve the effect of saving power, high transmission efficiency and convenient use

Inactive Publication Date: 2016-08-31
NORTHEAST GASOLINEEUM UNIV
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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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  • Point sound source positioning system intelligent detecting front-end based on semispherical microphone array
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  • Point sound source positioning system intelligent detecting front-end based on semispherical microphone array

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Embodiment Construction

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

[0022] like 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 the ...

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Abstract

The invention relates to a point sound source positioning system intelligent detecting front-end based on a semispherical microphone array. The point sound source positioning system intelligent detecting front-end based on the semispherical microphone array comprises an STM32 processor, a sound source detecting unit, signal conditioning circuits and a data transmission module. Microphones in the sound source detecting unit are connected with corresponding signal conditioning circuits. Each signal conditioning circuit is powered by a single lithium battery in a centralized manner. Each signal conditioning circuit is connected with the STM32 processor. The STM32 processor is connected with a data transmission module. The semispherical microphone array is utilized in the sound source detecting unit. The directions of microphones on each layer of the semispherical surface are arranged in a direction of a normal line between a sphere center and the point. The point sound source positioning system intelligent detecting front-end aims at the point sound source and acquires noise information in different angles and different directions in a synchronous real-time multipoint manner. Furthermore synchronous normalization processing is performed on multipoint information. 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 Applications(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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