| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To exactly obtain the action state of a person with a small amount of operation, in a human body detector using a Doppler signal. <P>SOLUTION: This human body detector using the Doppler signal of a propagation wave reflected by a human body includes a propagation wave transmitting section for radiating a propagation wave toward the human body, a propagation wave receiving section for receiving the propagation wave reflected by the human body, a Doppler signal generating section for generating the Doppler signal based on the propagation wave radiated by the propagation wave transmitting section and the propagation wave received by the propagation wave receiving section, a Doppler signal analysis section for analyzing the Doppler signal generated by the Doppler signal generating section and calculating the amplitude of the Doppler signal, and an action state determining section that, when the amplitude of the Doppler signal exceeds a first amplitude threshold and then becomes lower than the first amplitude threshold, estimates the distance to the human body based on the amplitude of the Doppler signal at a predetermined time before that point of time and determines the action state of the human body based on the estimation result. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
