Patent ID: 9733356
Date: 2017-08-15
CPC Classifications: A61B,G01S,G08B

Claim:
1. A system for monitoring animate presence, comprising: one or more ultrasonic transducers configured to transmit an ultrasonic signal comprising a train of pulses; one or more ultrasonic receivers configured to receive an echo signal in response to the transmitted ultrasonic signal, the echo signal comprising multiple pulses in response to the train of pulses of the transmitted signal; an electronic circuit for comparing the transmitted signal to the received echo signal to identify a phase shift between the transmitted signal and the received echo signal, and additionally depicting the multiple pulses of the received echo signal to overlap in a graph to view positions in which the multiple pulses differ and transforming the multiple pulses to a frequency domain graph to detect frequencies of breathing and heartbeats caused by animate presence; wherein the electronic circuit identifies animate presence based on the identified phase shift and the depicted graphs.