| 摘要 |
PROBLEM TO BE SOLVED: To precisely detect temperature abnormality that occurs in underfloor equipment installed under a floor of a railway vehicle consisting of one or more cars.SOLUTION: An equipment temperature value which is a temperature value of underfloor equipment is obtained. Obtained equipment temperature values are accumulated. By using an accumulated temperature value which is an accumulated equipment temperature value and a similarity defined in advance for the accumulated temperature value, a cluster analysis is performed for classification into two clusters, a normal cluster and an abnormal cluster, one of which is assumed to be normal and the other is assumed to be abnormal, as a degree of temperature abnormality that occurs in the underfloor equipment. A temperature value representing an inter-cluster distance which is a distance between two classified clusters is set as an abnormality determination threshold value. An equipment temperature value of determination object equipment which is underfloor equipment requiring determination of temperature abnormality is obtained the accumulated temperature values as a determination temperature value. By comparing the determination temperature value with the abnormality determination threshold value, when the determination temperature value is greater than the abnormality determination threshold value, an abnormality determination is made determining that temperature abnormality has occurred in the determination object equipment.SELECTED DRAWING: Figure 1 |
