PROBLEM TO BE SOLVED: To more efficiently transmit a pressure change by displacement of a body surface of a subject by respiration to a piezoelectric transducer.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 14 that is brought into contact with the body surface 30 when the sensor device 10 is mounted on the body surface 30 displacement-signal conversion means connected to the contact piece 12 for converting the displacement of the body surface 30 to an electric signal and output means for outputting the electric signal to an external device. The height of the contact piece 12 and the overall height of the sensor device 10 are the height and the overall height by which the contact piece 12 is pressed against the body surface 30 in a pressurized state and the body surface 30 is decompressed and deformed along the contact surface 14 when the sensor device 10 is held between the body surface 30 and clothing of the subject, and mounted on the body surface 30.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より効率的に圧電振動子へ伝達できるようにすること。【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30に装着される際に体表面30に接触する接触面14を有する接触子12と、接触子12に連結され体表面30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12の高さ及びセンサ装置10の全高が、それぞれ、センサ装置10が体表面30と被検者の着衣との間に挟持されて体表面30に装着された際に接触子12が体表面30に対して加圧された状態にて押し付けられて体表面30が接触面14に沿って窪み変形する高さ及び全高を有している。【選択図】図3
