DEFLECTION MEASUREMENT METHOD, DEFLECTION MEASUREMENT SYSTEM, AND DEFLECTION MEASUREMENT PROGRAM

To improve the accuracy of maximum deflection amount through deleting a speed caused by motion of a vehicle from a relative speed to a vehicle running surface including a deflection speed.SOLUTION: A deflection measurement method comprises steps of: acquiring measured values with a meter 21 for elevation angle fluctuation and doppler vibration meters LDV1 to 3 by running a loading vehicle 10 rigidly connected with a sensor cradle 20 in which the meter 21 for the elevation angle fluctuation and the doppler vibration meters LDV1 to 3 are rigidly connected; deleting fluctuated speed caused by vertical motion of a vehicle from measured values through getting difference of the measured values with the doppler vibration meters LDV1 to 3; deleting fluctuated speed caused by the elevation angle fluctuation of the vehicle based on a value from deletion of the fluctuated speed caused by vertical motion of the vehicle and an angular speed based on the fluctuation of the vehicle elevation angle in a running direction acquired with the meter 21 for the elevation angle fluctuation; and calculating a maximum deflection amount from a deflection speed after deletion of the fluctuated speed caused by vertical motion of the vehicle and the fluctuated speed caused by the elevation angle fluctuation of the vehicle.SELECTED DRAWING: Figure 5 【課題】たわみ速度含む車両走行面との相対速度から車両の動きに由来する速度を除去することで、最大たわみ量の確度向上を図る。【解決手段】仰角変動計２１と、複数のドップラー振動計ＬＤＶ１～３とが剛結されたセンサ架台２０が剛結された載荷用車両１０を走行させ、仰角変動計２１およびドップラー振動計ＬＤＶ１～３から測定値を取得し、複数のドップラー振動計ＬＤＶ１～３から取得された測定値の差をとることで、測定値から車両の上下動に由来する変動速度を除去し、車両の上下動に由来する変動速度が除去された値および仰角変動計２１から取得された車両進行方向の車両仰角の変動に基づく角速度を用いて、車両の仰角変動に由来する変動速度を除去し、車両の上下動に由来する変動速度と車両の仰角変動に由来する変動速度が除去されたたわみ速度から最大たわみ量を算出する。【選択図】図５