| 摘要 |
PURPOSE:To estimate accurately the factor of a plant trouble by using the time point when the abnormal information is detected as well as the normal information after giving a trouble factor to each device with the direct trouble influence reaction given between two devices respectively. CONSTITUTION:A plant 101 contains plural pieces of component devices 102 and a state detecting sensor 103 and delivers a state signal 104 to an abnormality detecting device 107 consisting of an abnormality detector 106. The device 107 stores previously a normal/abnormal decision reference signal to compare this signal with a detection signal 105 and delivers the result of this comparison to a trouble factor estimating device 109. The device 109 checks these comparison results for each fixed period of time and stores a time pint when an abnormal signal is produced. Thus a trouble factor is given to each device 102 together with the influence direction, the maximum/minimum influence time and the influence probability given between devices 102 respectively. Then the trouble factor is estimated from the time point when said abnormal signal is detected and the normal information and displayed on a display device 115. |
