Circular array sound source positioning visualization system and method

Abstract

The invention relates to a circular array sound source positioning visualization system, and the system is characterized by comprising 16 microphones, a vision acquisition module, a data acquisition module and a data processing module, wherein 16 microphones are uniformly distributed on a circle with the circle center of O and the radius of r; the vision acquisition module is provided with an industrial camera at the position where the center of a circle O, namely the optical center is, and the optical axis is outward and coincides with the Z axis, the industrial camera is electrically connected with an upper computer, the data acquisition module is a data acquisition card which is electrically connected with the output ends of the 16 microphones, the data acquisition card is connected with the upper computer, the data processing module processes and calculates the acquired visual data and sound data, calculates the angle of a sound source, and displays the position of the sound sourcein a photo and the sound intensity power of the sound source. The invention also comprises a sound source positioning method. The angle searching range can be obtained, and the occurrence of pseudo peaks is avoided; the variable step power spectrum peak searching angle is adopted to gradually approach the sound source angle, so that the precision is improved and the calculation times are reduced;and the corresponding angle of a pixel point and the sound intensity power thereof are calculated according to the coordinate inverse mapping to perform image processing to finish image fusion, thereby realizing sound source visualization.

Description

technical field [0001] The technology of the present invention relates to the field of sound source localization, and is a circular array sound source localization visualization system and method. Background technique [0002] In the existing technology, the operating conditions of nuclear power plant equipment are becoming more and more complex, and there are more and more failure reasons. It is becoming more and more difficult to detect equipment failures relying on manual experience. Therefore, automatic equipment failure detection technology is becoming more and more important. Acoustic detection technology has gradually attracted the attention of nuclear power enterprises due to its non-contact characteristics. Since the operation of faulty mechanical equipment is always accompanied by machine noise, these noise signals contain fault information about the operation of mechanical equipment, so the fault sound source of the equipment can be located through mechanical nois...

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Problems solved by technology

[0003] Most of the existing sound source localization devices are three-dimensional structures, such as Chinese patent application number 201710362998, which is named: "Robust The microphone array used in the "sound source localization method" has a regular tetrahedral structure, which leads to a large volume of the device, a complex array structure, difficult to move and transport, and prone to collision damage; secondly, the current sound source localization system cannot satisfy Real-time monitoring requirements; the sound source location system can only quantitatively represent the position information of the sound in digital form, and cannot intuitively display the specific position and sound intensity information of the sound source, with low degree of visualization and poor practicability

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