超音波反射強度変化の自己相関性による 玉軸受の転がり挙動評価
Evaluation of Rolling Behavior in Ball Bearings by Autocorrelation of Changes in Ultrasonic Reflection Intensity
著者:
若林 利明 Toshiaki WAKABAYASHI 向井 昌規 Masanori MUKAI
発刊日:
公開日:
Autocorrelation CoefficientBall BearingDiagnosisRolling BehaviorUltrasonic Technique
概要
Failures of machines having rotating parts are mostly caused by damage to bearings and conventional diagnostic methods have found difficulties in performing the early detection of such damage, so that more advanced diagnosis is necessary. This study therefore applies an ultrasonic technique to bearing life tests. The experimental results of ultrasonic wave pulse (UWP) echoes have demonstrated that the time intervals between peaks of UWP echoes varied in accordance with the movement of rolling balls. The autocorrelation coefficient has further been used to analyze the UWP echoes. The values of the autocorrelation coefficient were in good connection with the time intervals between peaks of UWP echoes and were thought to provid the possibility of the early detection of abnormalities in ball bearings.