Title:
SENSOR DEVICE, AND CONTROL METHOD AND PROGRAM THEREFOR
Document Type and Number:
WIPO Patent Application WO/2020/049781
Kind Code:
A1
Abstract:
This sensor device includes: a sensor unit which outputs a sinusoidal detection signal having the amplitude according to a physical amount of a subject to be detected; a reference signal generation unit which generates a first sinusoidal reference signal having the same frequency and phase as the detection signal; and a demodulation unit which multiplies the first reference signal by the detection signal output from the sensor unit, and generates, as a first demodulation signal according to a physical amount of the subject to be detected, a signal according to a DC component included in a signal of the multiplication result. The reference signal generation unit generates a second sinusoidal reference signal having the same frequency as the detection signal but having a phase deviated from that of the detection signal. The demodulation unit multiplies the second reference signal by the detection signal output from the sensor unit, and generates, as a second demodulation signal according to a noise component that overlaps the detection signal, a signal according to a DC component included in a signal of the multiplication result.
Inventors:
YAMADA TOMOKI (JP)
Application Number:
PCT/JP2019/012229
Publication Date:
March 12, 2020
Filing Date:
March 22, 2019
Export Citation:
Assignee:
ALPS ALPINE CO LTD (JP)
International Classes:
G06F3/041; G06F3/044; H03K17/945; H03K17/955; H03K17/96
Domestic Patent References:
| WO2014058070A1 | 2014-04-17 |
Foreign References:
| US20110063993A1 | 2011-03-17 | |||
| JP5853681B2 | 2016-02-09 | |||
| JP2013206463A | 2013-10-07 | |||
| JP2013135346A | 2013-07-08 | |||
| JP2018167887A | 2018-11-01 |
Other References:
See also references of EP 3848783A4
Attorney, Agent or Firm:
ITOH, Tadashige et al. (JP)
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