Patent ID: 8552871

Claim:
An apparatus for sensing photoplethysmogram and fall comprising: a sensor unit that senses acceleration and photoplethysmogram; a photoplethysmogram/fall determining module that synthetically tests the acceleration signals and photoplethysmogram signals sensed by the sensor unit to determine whether an emergency occurs due to fall or an emergency occurs due to photoplethysmogram; and a communication module that transmits the determined results, wherein the photoplethysmogram/fall determining module, collects and frames the acceleration signals and the photoplethysmogram signals and tests and determines the acceleration signals and the photoplethysmogram signals in a frame unit, tests the acceleration signals for one frame to decide whether the user conducts ordinary behavior or falls, and classifies and stores the behavior pattern from the acceleration signals of one frame if it is determined that the user conducts ordinary behavior according to the test results.