FR2928458B1 - Dispositif de mesure d'une variation de capacite, capteur capacitif mettant en oeuvre un tel dispositif et procede associe - Google Patents

Dispositif de mesure d'une variation de capacite, capteur capacitif mettant en oeuvre un tel dispositif et procede associe

Info

Publication number
FR2928458B1
FR2928458B1 FR0801218A FR0801218A FR2928458B1 FR 2928458 B1 FR2928458 B1 FR 2928458B1 FR 0801218 A FR0801218 A FR 0801218A FR 0801218 A FR0801218 A FR 0801218A FR 2928458 B1 FR2928458 B1 FR 2928458B1
Authority
FR
France
Prior art keywords
capacitor
capacitance
variation
measuring
associated method
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
FR0801218A
Other languages
English (en)
Other versions
FR2928458A1 (fr
Inventor
Frederic Cantie
Bertrand Vaysse
Xavier Hourne
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vitesco Technologies GmbH
Original Assignee
Continental Automotive France SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Continental Automotive France SAS filed Critical Continental Automotive France SAS
Priority to FR0801218A priority Critical patent/FR2928458B1/fr
Priority to PCT/EP2009/001488 priority patent/WO2009112179A1/fr
Publication of FR2928458A1 publication Critical patent/FR2928458A1/fr
Application granted granted Critical
Publication of FR2928458B1 publication Critical patent/FR2928458B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/945—Proximity switches
    • H03K17/955—Proximity switches using a capacitive detector
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
    • H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
    • H03K2217/96—Touch switches
    • H03K2217/9607—Capacitive touch switches
    • H03K2217/96071—Capacitive touch switches characterised by the detection principle
    • H03K2217/960725—Charge-transfer

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

Dispositif de mesure d'une variation de capacité (Cx) d'un condensateur (3) comprenant une électrode de détection (2), dont la capacité (Cx) est susceptible de varier à l'approche d'un objet ou d'une partie de corps d'un utilisateur, comprenant des moyens d'application (S1) d'une tension de charge (Vcc) du condensateur fournie par une source de tension (5), des moyens d'établissement d'un transfert de charge (S2) du condensateur vers une capacité de référence (Cs) disposée en parallèle dudit condensateur, des moyens de détermination d'un nombre de transferts de charge du condensateur vers la capacité de référence (Cs), nécessaire pour atteindre une tension de seuil prédéfinie (Vs) aux bornes de la capacité de référence, ledit dispositif étant caractérisé en ce qu'il comprend des moyens (6) de modification du nombre de transferts de charge nécessaire, lesdits moyens étant couplés sans contact à l'électrode de détection (2) du condensateur (3) pour ajouter ou retirer des charges audit condensateur lors de l'établissement de transferts de charge vers ladite capacité de référence.L'invention se rapporte également au procédé associé.
FR0801218A 2008-03-06 2008-03-06 Dispositif de mesure d'une variation de capacite, capteur capacitif mettant en oeuvre un tel dispositif et procede associe Expired - Fee Related FR2928458B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR0801218A FR2928458B1 (fr) 2008-03-06 2008-03-06 Dispositif de mesure d'une variation de capacite, capteur capacitif mettant en oeuvre un tel dispositif et procede associe
PCT/EP2009/001488 WO2009112179A1 (fr) 2008-03-06 2009-03-03 Dispositif de mesure d'une variation de capacite, capteur capacitif mettant en oeuvre un tel dispositif et procede associe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0801218A FR2928458B1 (fr) 2008-03-06 2008-03-06 Dispositif de mesure d'une variation de capacite, capteur capacitif mettant en oeuvre un tel dispositif et procede associe

Publications (2)

Publication Number Publication Date
FR2928458A1 FR2928458A1 (fr) 2009-09-11
FR2928458B1 true FR2928458B1 (fr) 2010-12-10

Family

ID=40084383

Family Applications (1)

Application Number Title Priority Date Filing Date
FR0801218A Expired - Fee Related FR2928458B1 (fr) 2008-03-06 2008-03-06 Dispositif de mesure d'une variation de capacite, capteur capacitif mettant en oeuvre un tel dispositif et procede associe

Country Status (2)

Country Link
FR (1) FR2928458B1 (fr)
WO (1) WO2009112179A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2675583B1 (fr) * 1991-04-18 1993-08-27 Marelli Autronica Procede et dispositif de mesure de condensateur.
US7449895B2 (en) * 2005-06-03 2008-11-11 Synaptics Incorporated Methods and systems for detecting a capacitance using switched charge transfer techniques
JP5395429B2 (ja) * 2005-06-03 2014-01-22 シナプティクス インコーポレイテッド シグマデルタ測定法を使用してキャパシタンスを検出するための方法およびシステム
EP2280483A1 (fr) * 2005-06-03 2011-02-02 Synaptics, Incorporated Procedes et systemes pour le blindage d'un capteur a capacite de transfert de charge pour la detection de proximite

Also Published As

Publication number Publication date
FR2928458A1 (fr) 2009-09-11
WO2009112179A1 (fr) 2009-09-17

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Legal Events

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PLFP Fee payment

Year of fee payment: 9

PLFP Fee payment

Year of fee payment: 10

PLFP Fee payment

Year of fee payment: 11

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Year of fee payment: 13

TP Transmission of property

Owner name: VITESCO TECHNOLOGIES, DE

Effective date: 20210309

ST Notification of lapse

Effective date: 20211105