Intelligent control system of free sound field miniature acoustic holography measurement and inversion device

Abstract

The invention discloses an intelligent control system of a free sound field small acoustic holography measurement and inversion device. The invention relates to an automatic control system. The intelligent control system comprises a control center module and an accessory module, an upper computer interface module, an information input display module, a range finding module, a sound pressure test and acoustic inversion calculation module, a whole device horizontal adjustment driving module, a microphone array vertical motion driving module, a microphone array rotation motion driving module, a microphone array transverse motion driving module, a microphone array longitudinal motion driving module, a microphone array correction motion driving module and a sensor signal input module connectedwith the control center module. By means of the control system, the testing and inverting device can be automatically adjusted, coordinate positioning of the testing device can be automatically conducted, the sound pressure can be automatically tested, the sound pressure can be automatically calculated, the sound field can be inverted, and the control system has the advantages of being high in testing speed, high in data calculation precision, labor-saving and time-saving.

Description

Technical field [0001] The invention relates to an intelligent control system, in particular to an intelligent control system for a small acoustic holographic measurement and inversion device of a free sound field. Background technique [0002] Near-field acoustic holography technology is a hot spot in acoustic research in recent years. Through near-field acoustic holography (NAH), sound source identification and localization can be performed more accurately. This technology can be used to achieve near-field sound field reconstruction and visualization. Therefore, NAH Technical research is of great practical significance for suppressing noise pollution. The key to NAH technology is how to measure the distribution of complex sound pressure on the holographic surface and how to use the complex sound pressure on the holographic surface to perform acoustic inversion of the sound field. The test device and the inversion device are relatively cumbersome, the debugging and installation ...

AI Technical Summary

Problems solved by technology

[0002] Near-field acoustic holography technology is a hot spot in acoustic research in recent years. Near-field acoustic holography (NAH) can be used to identify and locate sound sources more accurately. Using this technology, near-field sound field reconstruction and visualization can be realized. Therefore, NAH The research of technology has great practical significance for suppressing noise pollution. The key of NAH technology is how to measure the complex sound pressure distribution on the holographic surface and how to use the complex sound pressure on the holographic surface to carry out acoustic inversion of the sound field. The existing Both the test device and the inversion device are relatively heavy, and debugging and installation are very troublesome. The workload is very heavy, requiring a lot of manpower and material resources, and the test results are generally not completed on site, and the inversion calculation needs to be returned to the laboratory for processing, so for NAH The application of advanced technology is a big obstacle, so a small, lightweight new device for acoustic holographic testing and inversion is needed. Under the control of the corresponding intelligent control system, the device can automatically adjust, automatically correct, and automatically test. , on-site automatic calculation of inversion results to reduce a lot of manpower and material resources, reduce people's labor intensity, and is especially suitable for large-scale complex free and stable sound field field operations

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