Abnormality detection method and abnormality detection device for air spring for railway vehicle

摘要

PROBLEM TO BE SOLVED: To provide an abnormality detection method and an abnormality detection device for an air spring for a railway vehicle capable of accurately making an abnormality determination of an air spring based on a diagonal unbalance of a vehicle body based on a simple determination condition. .. SOLUTION: A front bogie 2 located on the front side of a car body 1 of a railroad vehicle 100 and a rear bogie 3 located on the rear side of the car body 1 are respectively provided on the left and right sides, and these car body 1 and bogies 2 and 3 are provided. A measurement process of measuring the pressure of each of the air springs AS1 to AS4 for adjusting the interval, and a moving average for each predetermined distance of the vehicle body 1 for the diagonal unbalance value (A) of the air springs AS1 to AS4 arranged on the diagonal line are calculated. There is a calculation step of calculating and a judgment step of judging whether or not there is an abnormality in the air springs AS1 to AS4 based on the result of comparison between the calculated moving average and a preset reference value. [Selection diagram] Figure 2