It designates that pressure depth is calculated simply and high order accuracy as topic. As for this invention, the pressure depth calculation system 1000 which calculates the pressure depth which is size of the dent due to the aforementioned pressure of target ones which were pressed, the pressure depth calculation device 2 which calculates pressure depth the measurement equipment on the basis of the information from of 1 which is installed in aforementioned target ones and measurement equipment 1 and, it has. Pressure depth calculation device 2 calculates transfer coefficient on the basis of with 2 floor differential ripple mark which was created concerning the information which is acquired from magnetometric sensor 19 and the accelerating information which is acquired from accelerating sensor 13, aforementioned creates the displacement ripple mark of the pressure part by the fact that transfer coefficient is multiplied in the information which is acquired, calculates pressure depth on the basis of that displacement ripple mark.簡易かつ高精度に圧迫深度を計算することを課題とする。本発明は、圧迫された対象物の前記圧迫による凹みの大きさである圧迫深度を計算する圧迫深度計算システム1000であって、前記対象物に取り付けられる測定装置1と、測定装置1からの情報に基づいて圧迫深度を計算する圧迫深度計算装置2と、を備える。圧迫深度計算装置2は、磁気センサ19から取得した情報について作成した2階微分波形と、加速度センサ13から取得した加速度情報とに基づいて変換係数を計算し、前記取得した情報にその変換係数を乗算することで圧迫部分の変位波形を作成し、その変位波形に基づいて圧迫深度を計算する。
