An apparatus for detecting pulse waves and motion intensity of a living body in motion is disclosed. The apparatus has photosensors of the photo-coupler type for wavelengths of 660 nm and 940 nm, respectively. The sensors are attached to a person under examination, and provide output signals which include...http://www.google.ca/patents/US6022321?utm_source=gb-gplus-sharePatent US6022321 - Blood pulse wave detecting apparatus and motion intensity measuring apparatus
