JP7431335B2 - 静電容量検出装置、及び、静電容量検出方法 - Google Patents
静電容量検出装置、及び、静電容量検出方法 Download PDFInfo
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- 238000001514 detection method Methods 0.000 title claims description 222
- 230000010363 phase shift Effects 0.000 claims description 23
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- 239000013256 coordination polymer Substances 0.000 description 2
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- 229910001887 tin oxide Inorganic materials 0.000 description 2
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- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/24—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance
- G01D5/2403—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance by moving plates, not forming part of the capacitor itself, e.g. shields
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2605—Measuring capacitance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/16—Spectrum analysis; Fourier analysis
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mathematical Physics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Description
図1は、実施形態の静電容量検出装置100を示す図である。静電容量検出装置100は、センサ部110、交流信号源120、検出回路130、及び位相調整回路140を含む。静電容量検出方法は、静電容量検出装置100において静電容量を検出するために後述する位相の調整を行う方法である。
110 センサ部
120 交流信号源
130、130M 検出回路
135 差動増幅器
140 位相調整回路
131 乗算器
132 LPF
140A 位相シフト回路
140B 反転増幅回路
150 マルチプレクサ
Claims (7)
- 1又は複数の検出電極と、
前記検出電極に近接して配置されるシールド電極と、
前記シールド電極に交流信号を供給する交流信号源と、
前記検出電極から出力される検出信号と前記交流信号源から出力される交流信号とに基づいて、前記検出電極に近接する対象物と前記検出電極との間の静電容量を検出する検出回路と、
前記交流信号源と前記シールド電極との間に設けられ、前記検出回路に入力される前記検出信号と前記交流信号との位相が揃うように、前記交流信号の位相を進める位相調整回路と
含む、静電容量検出装置。 - 前記位相調整回路は、
前記交流信号の位相を遅らせる位相シフト回路と、
前記交流信号の位相を反転させる反転増幅回路と
を有する、請求項1に記載の静電容量検出装置。 - 前記検出回路は、前記検出信号と前記交流信号とを乗算する乗算器を有する、請求項1又は2に記載の静電容量検出装置。
- 前記検出回路は、前記乗算器の出力のうち遮断周波数以下の帯域成分を通過させるローパスフィルタをさらに有する、請求項3に記載の静電容量検出装置。
- 前記検出回路は、前記検出電極に接続される反転入力端子と前記交流信号が印加される非反転入力端子との電圧差を増幅して出力する演算増幅器を有する、請求項1又は2に記載の静電容量検出装置。
- 前記検出電極は複数あり、
複数の前記検出電極のうちの1又は複数の前記検出電極を時分割で選択する選択部をさらに備え、
前記検出回路は、前記選択部により選択された検出電極から出力される検出信号と前記交流信号源から出力される交流信号とに基づいて、前記検出電極に近接する対象物と前記検出電極との間の静電容量を検出し、
前記位相調整回路は、前記選択部により選択された1又は複数の前記検出電極に応じて、前記交流信号の位相進み量を調節する、請求項1乃至5のいずれか1項に記載の静電容量検出装置。 - 1又は複数の検出電極と、
前記検出電極に近接して配置されるシールド電極と
を含む静電容量検出装置における静電容量検出方法であって、
交流信号源から前記シールド電極に交流信号を供給するステップと、
前記検出電極から出力される検出信号と前記交流信号源から出力される交流信号とに基づいて、前記検出電極に近接する対象物と前記検出電極との間の静電容量を検出するステップと、
前記静電容量を検出するステップにおける前記検出信号と前記交流信号との位相が揃うように、前記交流信号の位相を進めるステップと
含む、静電容量検出方法。
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JP2020139645 | 2020-08-20 | ||
JP2020139645 | 2020-08-20 | ||
PCT/JP2021/019641 WO2022038853A1 (ja) | 2020-08-20 | 2021-05-24 | 静電容量検出装置、及び、静電容量検出方法 |
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JPWO2022038853A1 JPWO2022038853A1 (ja) | 2022-02-24 |
JP7431335B2 true JP7431335B2 (ja) | 2024-02-14 |
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US (1) | US20230175870A1 (ja) |
EP (1) | EP4174497A1 (ja) |
JP (1) | JP7431335B2 (ja) |
KR (1) | KR20230020520A (ja) |
CN (1) | CN115803641A (ja) |
WO (1) | WO2022038853A1 (ja) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002350477A (ja) | 2001-05-29 | 2002-12-04 | Sumitomo Metal Ind Ltd | インピーダンス検出回路 |
JP2003075482A (ja) | 2001-09-06 | 2003-03-12 | Sumitomo Metal Ind Ltd | インピーダンス検出方法、静電容量検出方法及びそのための装置 |
JP2011247610A (ja) | 2010-05-24 | 2011-12-08 | Renesas Electronics Corp | インピーダンス検出回路およびインピーダンス検出方法 |
JP2011525323A5 (ja) | 2009-06-10 | 2012-07-26 | ||
WO2018116706A1 (ja) | 2016-12-21 | 2018-06-28 | アルプス電気株式会社 | 静電容量検出装置及び入力装置 |
US20200141989A1 (en) | 2018-11-02 | 2020-05-07 | Synaptics Incorporated | Sigma-delta configurations for capacitance sensing |
Family Cites Families (2)
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US8723532B2 (en) | 2008-06-13 | 2014-05-13 | Koninklijke Philips N.V. | Capacitive proximity device and electronic device comprising the capacitive proximity device |
JP2020139645A (ja) | 2019-02-27 | 2020-09-03 | 日立グローバルライフソリューションズ株式会社 | 冷蔵庫 |
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2021
- 2021-05-24 EP EP21858004.1A patent/EP4174497A1/en active Pending
- 2021-05-24 KR KR1020237000448A patent/KR20230020520A/ko unknown
- 2021-05-24 CN CN202180044768.7A patent/CN115803641A/zh active Pending
- 2021-05-24 JP JP2022543286A patent/JP7431335B2/ja active Active
- 2021-05-24 WO PCT/JP2021/019641 patent/WO2022038853A1/ja unknown
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- 2023-01-31 US US18/162,507 patent/US20230175870A1/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002350477A (ja) | 2001-05-29 | 2002-12-04 | Sumitomo Metal Ind Ltd | インピーダンス検出回路 |
JP2003075482A (ja) | 2001-09-06 | 2003-03-12 | Sumitomo Metal Ind Ltd | インピーダンス検出方法、静電容量検出方法及びそのための装置 |
JP2011525323A5 (ja) | 2009-06-10 | 2012-07-26 | ||
JP2011247610A (ja) | 2010-05-24 | 2011-12-08 | Renesas Electronics Corp | インピーダンス検出回路およびインピーダンス検出方法 |
WO2018116706A1 (ja) | 2016-12-21 | 2018-06-28 | アルプス電気株式会社 | 静電容量検出装置及び入力装置 |
US20200141989A1 (en) | 2018-11-02 | 2020-05-07 | Synaptics Incorporated | Sigma-delta configurations for capacitance sensing |
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Publication number | Publication date |
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US20230175870A1 (en) | 2023-06-08 |
WO2022038853A1 (ja) | 2022-02-24 |
CN115803641A (zh) | 2023-03-14 |
EP4174497A1 (en) | 2023-05-03 |
JPWO2022038853A1 (ja) | 2022-02-24 |
KR20230020520A (ko) | 2023-02-10 |
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