| 摘要 |
<p>PROBLEM TO BE SOLVED: To measure pulse waves without influence of bodily movement noise by a piezoelectric pulse wave detection means for measuring the time intervals of pulses by sensing a displacement of a skin surface due to pulsation and an ultrasonic pulse wave detection means to measure a time interval of pulses by the Doppler effect of the reflected ultrasound wave. SOLUTION: A display means 207 is provided on the surface of a casing wrapped around the wrist by a wearing band, and a probe 201 of an ultrasonic pulse wave measuring means 202 and a piezoelectric element 203 of a piezoelectric pulse wave measuring means 204 are incorporated into the band. The piezoelectric pulse wave measuring means 204 outputs a voltage generated when stress is applied to the piezoelectric element 203 by the displacement of a skin surface due to pulsation, and the ultrasonic pulse wave detecting means 202 detects and outputs frequency charge responding to bloodstream by the Doppler effect of reflected ultrasound. Output signals of the pulse wave measuring means 202 and 204 are selected and processed by a switching means 205, and the pulse waves are displayed on the display means 207.</p> |
