| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for minimizing current consumption for operating a microwave Doppler sensor and reliably detecting and monitoring a human body and breath.SOLUTION: In a device for detecting a human body in a living space by using a microwave Doppler sensor, and detecting body motion and breath of the human body to monitor biological information, when the device is turned on to wait for the existence/absence of a human body to be detected, the microwave Doppler sensor transmits a microwave as pulse modulation at intervals to monitor the existence/absence of a human body with low current consumption, and when the human body is not detected again within a fixed time after detecting the human body, the microwave transmitted from the microwave Doppler sensor is switched from the pulse modulation to a non-modulation continuous wave and is continuously transmitted to monitor body motion and breath of a human body further specifically. |
