Patent ID: 9113793
Filing Date: 2015-08-25
Classification: A61B

Abstract:
1. A pulse wave sensor comprising: an armlet construction to be worn on a wrist of a living body and to measure a pulse wave, wherein the armlet construction comprises: a plurality of measurement units to measure the pulse wave, a plurality of power source units to supply power to respective ones of the measurement units, one or more cables to connect electrically between respective ones of the measurement units and a corresponding one of the power source units, a controller to perform ON/OFF control of each of the measurement units, an acceleration sensor portion, and an armlet type housing to contain the measurement units, the power source units and the one or more cables, wherein the measurement units are equally spaced from one another around the armlet type housing, wherein each of the measurement units comprises a light sensor to detect an intensity of light emitted toward the wrist and penetrating a living body, and the number of the power source units is smaller than that of the measurement units, and power is supplied from each power unit to a different respective sub-group of the measurement units, and wherein, based on the output of the acceleration sensor portion, the controller controls some of the light measurement units to be ON, while others of the measurement units are OFF.