軸非対称型ブリッジ回路と交差感度直交型重みづけ関数に基づく脱線係数と接触位置の連続測定法

抄録

Instrumented wheelsets are widely used in the railway industry for the purpose of measurement of the wheel-rail interaction forces, which are crucial factors in a running safety assessment. Recently, the author proposed a new configuration of bridge circuit for measuring wheel-rail lateral force, which are categorized as “axially-asymmetric bridge circuit.” The merit of this type of bridge circuit is to reduce the measurement error associated to the lateral contact point shift. In this study, we propose a highly accurate continuous measurement method of the derailment coefficient based on “cross-sensitivity orthogonal weighting functions” that utilizes the characteristics of an axially-asymmetric bridge circuits. A continuous measurement method for the lateral contact position is also proposed utilizing the concept of the orthogonal weighting functions. The validity of the proposed method was confirmed through roller-rig tests.