SENSOR DEVICE FOR DETECTING DISPLACEMENT OF HUMAN BODY SURFACE ACCOMPANYING RESPIRATION

摘要

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 3