DETERIORATION MONITORING METHOD AND DETERIORATION MONITORING DEVICE USING AE METHOD

摘要

PROBLEM TO BE SOLVED: To provide a deterioration monitoring method by an AE method in which an influence of noise is further reduced.SOLUTION: A deterioration monitoring method includes: a reference value acquisition step for acquiring the number of signals obtained by AE measurement for the same material as an inspection object over an entire observation period; an evaluation curve generation step for calculating the number of reference AE obtained by subtracting the number of reference noise signals set on the basis of the number of reference signals in the early stages of the entire observation period from each of the number of reference signals for each first unit period and indicating a transition over the entire observation period; an object value acquisition step for acquiring the number of object signals obtained by the AE measurement of the inspection object; an object AE number calculation step for calculating the number of object AE obtained by subtracting the number of object noise signals set on the basis of the number of object signals acquired in an early stages in time series from the number of object signals; and a deterioration evaluation step for evaluating the deterioration degree of the inspection object on the basis of the evaluation curve and the number of object AE.SELECTED DRAWING: Figure 3