ORBIT PLANE PROPERTY DISPLACEMENT DETECTION METHOD AND ORBIT PLANE PROPERTY DISPLACEMENT DETECTION DEVICE

To provide an orbit plane property displacement detection method or the like capable of detecting an orbit plane property displacement from information which can be obtained on a vehicle with a simple structure and achieving preferable accuracy even when a travel speed is a low speed.SOLUTION: An orbit plane property displacement detection method is used for a railway vehicle which comprises: a vehicle body 10; a first rank bogie and a second rank bogie 100 which are sequentially provided from a front side of a vehicle travel direction on a lower part of the vehicle body; first and second air springs 170 which are arranged between the first rank bogie and the vehicle body and separated in a lateral direction; and third and fourth air springs 170 which are arranged between the second rank bogie and the vehicle body and separated in the lateral direction. The method is configured to detect an upper height of the first or fourth air spring to a lower part, and on the basis of a diagonal differential component between the upper heights of the first and fourth air springs and upper heights of the second and third air springs, detect an orbit plane property displacement.SELECTED DRAWING: Figure 4 【課題】簡単な構成で車上で取得可能な情報から軌道平面性変位を検出可能でありかつ走行速度が低速である場合でも良好な精度が得られる軌道平面性変位検出方法等を提供する。【解決手段】車体１０と、車体の下部に車両の進行方向前方側から順次設けられた１位、２位台車１００と、１位台車と車体との間に左右に離間して配置された第１、第２の空気ばね１７０と、２位台車と車体との間に左右に離間して配置された第３、第４の空気ばね１７０とを備える鉄道車両における軌道平面性変位検出方法を、第１乃至第４の空気ばねの下部に対する上部高さをそれぞれ検出し、第１、第４の空気ばねの上部高さと、第２、第３の空気ばねの上部高さとの対角差成分に基づいて軌道平面性変位を検出する構成とする。【選択図】図４