Patent ID: 7112174
Filing Date: 2006-09-26
Classification: A61B

Abstract:
1. A pulse wave detection device, comprising: a sensor array having a plurality of pressure sensors arranged on a measurement surface; a pressurization portion for pressing said sensor array laid across an artery of a living body; a sensor signal selection portion for selecting a pressure signal among pressure signals from said plurality of pressure sensors; and a filter portion having a cutoff frequency variable corresponding to an instruction; wherein said filter portion cuts off a signal component having a frequency of at least a prescribed value included in the pressure signal selected by said sensor signal selection portion corresponding to said cutoff frequency; said pulse wave detection device further comprising: an analog/digital conversion portion for converting an analog signal passed through and output from said filter portion into a digital signal; a pressure sensor specification portion for specifying a pressure sensor for pulse wave detection among said plurality of pressure sensors; a pulse wave detection portion for detecting a pulse wave from said artery based on the digital signal corresponding to the pressure signal from the pressure sensor specified by said pressure sensor specification portion; and a filter control portion for providing the instruction to vary said cutoff frequency in said filter portion; wherein said filter control portion switches said cutoff frequency from a first value in a first situation wherein a plurality of pressure signals respectively obtained from said plurality of pressure sensors are successively switched and output by said sensor signal selection portion to specify said pressure sensor for pulse wave detection, to a second value in a second situation wherein the pulse wave is detected by said pulse wave detection portion.