SENSOR, AND FAUCET DEVICE USING SENSOR

WIPO Patent Application WO/2017/115459

A1

Provided are a faucet device and a sensor capable of measuring the distance to an object and detecting an object at a short distance. This sensor (10) has a detection unit (11) and a processing unit (13). The detection unit (11) outputs a digital value of a beat signal representing a frequency difference between the frequency of an emitted radio wave and the frequency of a received radio wave. A frequency analysis unit (131) of the processing unit (13) is configured to calculate a frequency spectrum of the beat signal. A correction unit (134) of the processing unit (13) adds a zero or zeros to the digital value to be inputted to the frequency analysis unit (131), the number of zeros being equal to a difference between the output bit number of the detection unit (11) and the input bit number of the frequency analysis unit (131). A calculation unit (135) of the processing unit (13) determines a peak frequency the power of which has a peak value from the frequency spectrum calculated by the frequency analysis unit (131), and converts the peak frequency to the distance to an object (Ob).

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JP2002214333	FM-CW RADAR APPARATUS FOR ROAD SURVEILLANCE
WO/2015/059260	FREQUENCY MODULATED RADAR LEVEL GAUGING

SUGINO SATOSHI

PCT/JP2016/005189

July 06, 2017

December 20, 2016

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PANASONIC IP MAN CO LTD (JP)

G01S13/34; E03C1/05

JPH07234275A	1995-09-05
JP2011149871A	2011-08-04
JP2010025901A	2010-02-04
JPH09504612A	1997-05-06
JP2003021677A	2003-01-24
JPH07146359A	1995-06-06
JPH11133142A	1999-05-21
JP2014182010A	2014-09-29
JP2013072237A	2013-04-22

KAMATA, Kenji et al. (JP)

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