PROBLEM TO BE SOLVED: To provide a railway vehicle abnormality detection method which achieves both safety operation with reliable detection of a failure in a railway vehicle and stable operation without erroneous detection.SOLUTION: A railway vehicle abnormality detection method uses: a sensor section 14 which measures oscillation Pa generated on a specific portion on a railway vehicle 100; a sampling section 16 which samples a signal of the oscillation Pa measured by the sensor section 14 under a predetermined condition; and a calculation section 18 which determines an occurrence of abnormality on the basis of a specific spatial frequency component extracted from the signal of the oscillation Pa sampled by the sampling section 16. The calculation section 18 calculates: a continued distance L which is a distance with continuation of abnormally high acceleration indicated by the oscillation Pa continuously higher than a first threshold line WT1; relative frequency R which is the number of times that the oscillation Pa exceeds the first threshold line WT1 within a predetermined period; and a maximum amplitude Wmax1 while the oscillation Pa exceeds the first threshold line WT1. Then, the occurrence of a critical failure is determined on the basis of the continued distance L, the maximum amplitude Wmax1, and the relative frequency R.SELECTED DRAWING: Figure 6
【課題】鉄道車両の故障を確実に検出する安全性と、誤検知しない安定性を両立した異常検知方法の提供。【解決手段】鉄道車両100の特定部位に生じる振動Paを測定するセンサ部14と、センサ部14で測定された振動Paの信号を所定の条件でサンプリングするサンプリング部16と、サンプリング部16でサンプリングされた振動Paの信号から抽出した特定の空間周波数成分に基づいて異常の有無を判定する演算部18と、を使用し、演算部18にて振動Paが、第1閾値直線WT1よりも連続して超えている異常加速度が継続する継続距離Lを算出し、所定時間内に振動Paが、第1閾値直線WT1を超えた回数である相対度数Rと、第1閾値直線WT1を超えている間の最大振幅Wmax1を算出し、継続距離L、最大振幅Wmax1、及び相対度数Rを用いて、重故障判定を行う。【選択図】図6
RAILWAY VEHICLE ABNORMALITY DETECTION METHOD
鉄道車両の異常検知方法
05.04.2018
Patent
Elektronische Ressource
Japanisch
IPC: | G01H MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES , Messen von mechanischen Schwingungen oder Ultraschall-, Schall- oder Infraschallwellen / B61F Untergestelle für Schienenfahrzeuge, z.B. Fahrgestellrahmen, Drehgestelle oder Anordnungen der Radsätze , RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES |
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