System and method for quickly positioning noise source through image identification and sound intensity scanning

Abstract

The invention discloses a system and a method for positioning a noise source. The method comprises the following steps of: adjusting the position and focal length of a camera until a taken image comprises a region to be detected, and storing an image which is taken as a background image into an upper computer; fixing a light source on a sound intensity probe which is connected with a data acquirer; endowing the image which is taken by the camera with the color of a light source by filtering; moving the sound intensity probe, and scanning on the surface of the region to be detected at constant speed; outputting a trigger signal by a pulse signal generator, continuously taking images by the camera, recording a motion image of the light source, recording the trigger signal and an acoustic signal by the data acquirer, and synchronizing the acoustic signal and image taking time; after detection is finished, processing the image, and thus obtaining the position of the light source in a picture; extracting the acoustic signal, and thus obtaining acoustic physical quantity information at a corresponding moment; dividing the region to be detected into triangular units, wherein nodes are the positions of the light source, which are acquired at all moments, and the acquired acoustic physical quantity serves as a cloud picture measuring value; and acquiring a sound field cloud picture, and displaying the sound field cloud picture. The invention has the advantages of quick positioning, accurate measurement and high accuracy.

Description

technical field [0001] The invention relates to a noise source location method, in particular to a noise source rapid location system and method using image recognition and sound intensity scanning. Background technique [0002] In order to effectively control noise, before noise reduction measures are implemented, noise source diagnosis must be carried out first to determine the location and characteristics of each major noise source. With the development of modern signal processing technology, spectral analysis technology, coherent and partial coherent analysis technology, sound intensity detection technology, beam forming, and near-field acoustic holography technology have been developed rapidly. [0003] Among these methods, the sound intensity detection technology has become a low-cost and high-efficiency tool in the noise source localization method because it uses fewer sensors and is easy to operate. The sound intensity detection technology determines the direction o...

AI Technical Summary

Problems solved by technology

However, none of these patents involves the use of image recognition technology to locate the spatial position of the measuring point, and their inventions only involve methods related to mechanical structure design in detection equipment

Moreover, in the above-mentioned devices and methods of the prior art, there is no description on how to use a fast positioning method to determine the position of the measurement point. During the measurement, the measurement position needs to be set in advance, and the measurement position is recorded after each measurement. This method Not convenient for engineering application, low efficiency

Images