| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method with which the operating state of a facility to be monitored can be monitored acoustically, by accurately distinguishing operating sounds from the facility from noise, such as operating sounds from other peripheral facilities, or the like, by accurately collecting the operating sounds from the facility. <P>SOLUTION: After first and second acoustic spectrum information is obtained, by performing frequency analyses on first and second sound volume signals obtained, by collecting the operating sounds from the facility 3 to be monitored by means of a first sound-sensitive sensor 2 provided relatively close to the facility and a second sound-sensitive sensor 4 provided relatively far from the facility, the peak information in the first sound spectrum information is stored in a data-storing section. Then monitoring location of the sensor 4 for the operating sounds is decided by extracting the first and second sound volume output values at the peak frequency from the first and second sound spectrum information and finding correlations between the sound volume output values, by comparing the values with each other and stored in the data storing section. Thereafter, the facility 3 is monitored, by installing the second sensor 4 to the monitoring location. <P>COPYRIGHT: (C)2004,JPO</p> |
