| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a water discharge control device using a Doppler sensor, capable of reducing discrimination errors and water discharge valve malfunctions due to specified noises which occur in a frequency band corresponding to a human body or a liquid flow.SOLUTION: The water discharge control device includes a differential signal generation part for generating a differential signal on the basis of transmission waves transmitted by a transmission part and reflection waves received by a reception part, a signal processing part for extracting frequencies and signal strength from the differential signal generated by the differential signal generation part, and control means for controlling water discharge from a water discharge part on the basis of the signal strength and the frequencies extracted by the signal processing part. The control part determines the differential signal as noises when, out of the frequency band corresponding to the human body or the liquid flow, a frequency band where the signal strength is lower than a first threshold value is larger than a second threshold value corresponding to a predetermined frequency band.</p> |
