A three-dimensional sound source imaging method and system based on a stereo array

A three-dimensional imaging and three-dimensional array technology, which is applied to radio wave measurement systems, instruments, and measurement devices, can solve the problems of increasing the number of array elements, increasing computational complexity, and increasing economic costs, and achieves accurate positioning effects

Active Publication Date: 2022-06-24
杭州兆华电子股份有限公司
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Problems solved by technology

However, the increase in the number of array elements will increase the economic cost and increase the computational complexity.

Method used

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  • A three-dimensional sound source imaging method and system based on a stereo array
  • A three-dimensional sound source imaging method and system based on a stereo array

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Embodiment

[0039] Embodiment: A three-dimensional imaging method for a sound source based on a stereo array of this embodiment specifically includes the following steps:

[0040] First go to step S1, select such as figure 1 The two receiving planes that form a certain angle with each other are shown. In this embodiment, the two receiving planes are perpendicular to each other. For each receiving plane, a number of sound source inference planes parallel to it are respectively arranged. On the sound source inference plane or between two sound source inference planes, the distance between the sound source and the receiving plane can be inferred. The sound source inference plane set for each receiving plane is as follows figure 2 As shown, multiple sound source inference planes are arranged in sequence along the normal direction of the receiving plane at a certain distance, until the distance of the sound source inference plane farthest from the receiving plane reaches a preset value to en...

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Abstract

The invention relates to a three-dimensional sound source imaging method based on a stereo array, comprising: selecting at least two receiving planes forming a certain angle with each other, and configuring several sound source inference planes and collection points for each receiving plane; Select a collection point on the plane to collect acoustic signals, use the collected acoustic signals to perform beamforming, and obtain the inferred position of the sound source closest to the sound source according to the maximum value of the beamforming value; then infer the position and The stereo position of the sound source is obtained by calculating the angle between the receiving planes. Synthetic aperture imaging is performed on multiple stereoscopic positions to obtain the precise location of the sound source. The method of the invention realizes the three-dimensional sound source localization of the large-aperture far field with low equipment requirement and cost, and the localization effect is more accurate.

Description

technical field [0001] The invention belongs to the technical field of sound source localization, and in particular relates to a three-dimensional imaging method and system of a sound source based on a stereo array. Background technique [0002] Spatial sound source localization is an important problem in the field of noise and vibration control. Beamforming technology is a technology that processes array signals and is used in sonar, radar and other fields. Traditional beamforming technology requires a large number of sensors and complex calculations, generally for the case where the sound source is far away from the receiving point. For the case where the sound source is close to the receiving point in the cabin or inside the vehicle, if fewer sensors are used and the traditional beamforming algorithm is used, good results cannot be obtained for the location of the far-field plane wave sound source. [0003] The multi-element ultrasonic imaging technology can improve the ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/20
Inventor 曹祖杨邵晓平王宇陈银炳
Owner 杭州兆华电子股份有限公司
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