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Random distribution microphone array

A microphone array and random distribution technology, which is applied in the direction of instruments, measuring ultrasonic/sonic/infrasonic waves, measuring devices, etc., can solve the problems of single form, difficult to adapt to different sound source frequencies and measurement distances, and reach the scope of application Wide and multi-functional effects

Active Publication Date: 2019-03-15
KUNMING UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

[0005] The invention provides a randomly distributed microphone array, which is used to solve the sound source localization problem that the traditional acoustic array rack has a single form and is difficult to adapt to different sound source frequencies and measurement distances in the process of noise source identification and location

Method used

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Examples

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Embodiment 1

[0019] Embodiment 1: as Figure 1-Figure 4 As shown, a randomly distributed microphone array includes an array frame 1, an array fixed support 2, an acoustic camera 3, and a three-dimensional sound intensity probe bracket 4;

[0020] The center of the array frame 1 is provided with a camera mounting hole 7, and the lens of the acoustic camera 3 coaxial with the center of the array frame 1 protrudes from the side of the array frame 1 through the central camera mounting hole 7 and the circular hole on the array fixing support 2 in turn. , and the acoustic camera 3 is fixed on the array fixed support 2; the periphery of the camera mounting hole 7 is uniformly distributed with support connection holes 5, and the support connection holes 5 are used for the connection between the array frame 1 and the array fixed support 2, and the array frame 1 A plurality of wiring holes 6 are randomly arranged on the basis of the Gaussian distribution law for installing microphones. The outermost...

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Abstract

The invention discloses a random distribution microphone array. The random distribution microphone array comprises an array frame, an array fixing support, an acoustic camera and three-dimensional sound intensity probe supports. Microphone measuring points are optimized by means of mixed Gaussian distribution so that the array can be used for not only medium-low-frequency medium-far-distance near-field acoustic holographic positioning but also a medium-high-frequency medium-far-distance beam forming positioning technology. At the same time, three-dimensional sound intensity probes can also beinstalled on the array frame for performing three-dimensional sound intensity measurement. Compared with a conventional single-form array frame structure, a random distribution microphone array framedevice has the advantages of having more functions and a wider application range.

Description

technical field [0001] The invention relates to a randomly distributed microphone array, which belongs to the field of noise source identification and positioning. Background technique [0002] With the continuous improvement of the manufacturing level, higher requirements are put forward for the noise quality of the product under the premise of satisfying the product function. The noise generated during the operation of mechanical equipment not only affects the environmental quality, but also contains a large amount of information about the operating status of the equipment. By locating the location of the noise source, we can quickly and easily find the location of the equipment failure. Therefore, acoustic fault diagnosis is a traditional vibration fault diagnosis. an effective supplement. The noise control, noise reduction and acoustic quality design of electromechanical products in modern industry are inseparable from the testing and evaluation of noise sources. At pr...

Claims

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Application Information

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IPC IPC(8): G01S5/18G01H17/00
CPCG01H17/00G01S5/18Y02T90/00
Inventor 王建新柳小勤伍星李源刘畅刘韬
Owner KUNMING UNIV OF SCI & TECH
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