Acoustic sensor array, acoustic diagnostic methods and acoustic diagnostic device

摘要

PROBLEM TO BE SOLVED: To shorten a time for diagnosing abnormality of an inspection object, and to improve diagnostic performance in an acoustic diagnostic device.;SOLUTION: This acoustic sensor array 32 is constituted by disposing in a grid-like shape acoustic sensors 10 having a function for decomposing into each frequency band. The acoustic sensor array 32 is arranged near the inspection object 31, and a sound emitted from the inspection object 31 is measured. The measured sound is decomposed into the frequency bands by each acoustic sensor, converted into signals, and outputted to an information processing part 34. In the information processing part 34, the signals from all the acoustic sensors are synthesized by a phased array method, and a map for showing the sound pressure intensity is created. Diagnosis of normality or abnormality of the inspection object 31 is performed based on the map.;COPYRIGHT: (C)2004,JPO&NCIPI