PARAMETER CALCULATING METHOD, STATUS MONITORING METHOD, PARAMETER CALCULATING DEVICE, STATUS MONITORING DEVICE, STATUS MONITORING SYSTEM, COMPUTER PROGRAM AND RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To provide a method for easily calculating a parameter indicating the status of an object to be monitored, a method for monitoring the status of the object by using a parameter, a parameter calculating device, a status monitoring device, a status monitoring system, a computer program and a recording medium.;SOLUTION: The vibration of a rolling bearing having m pieces of rolling elements is observed, and when any abnormality is caused in one rolling element as an initial failure, vibration data including a large signal for every m pieces are obtained. The data of the vibration of the object being a periodic moving body such as a rolling bearing are measured by a sensor 31, and the measured data are displayed at a data display device 51, and a parameter I₁ being the primary auto-correlation coefficient of a signal column is calculated by a simple formula from the number of signals, N, magnification s of the absolute value of the large signal to the absolute value of a signal other than the large signal and the number of signals, m included in a signal column per one large signal, and when the value of the parameter I₁ is less than a predetermined value, it is determined that any abnormality is caused in the object to be monitored.;COPYRIGHT: (C)2005,JPO&NCIPI