PROBLEM TO BE SOLVED: To provide a sensor device for detecting a pressure change by displacement of a human body surface of a subject by respiration by a change in output impedance of a piezoelectric transducer that can transmit the pressure change by displacement of a body surface to the piezoelectric transducer more efficiently.SOLUTION: A sensor device 10 mounted on a body surface of a subject for detecting displacement of the body surface accompanying respiration of the subject includes: a contact piece 12 having a contact surface that is brought into contact with the body surface when the sensor device 10 is mounted on the body surface displacement-signal conversion means connected to the contact piece 12 for converting the displacement of the body surface to an electric signal and output means for outputting the electric signal to an external device. The contact surface of the contact piece is of a curved-surface shape projecting in the direction from the peripheral edge toward the center.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2017,JPO&INPIT【課題】呼吸による被検者の体表面の変位による圧力変化を圧電振動子の出力インピーダンスの変化により検出するセンサ装置に於いて、体表面の変位による圧力変化をより効率的に圧電振動子へ伝達できるようにする。【解決手段】被検者の体表面に装着されて被検者の呼吸に伴う体表面の変位を検出するセンサ装置10は、センサ装置10が体表面に装着される際に体表面に接触する接触面を有する接触子12と、接触子12に連結され体表面の変位を電気信号に変換する変位-信号変換手段と、電気信号を外部装置へ出力する出力手段とを含み、接触子の接触面が周縁から中心へ向かう方向に突出した曲面状である。【選択図】図3
