FR3123525B1 - Capteur de proximité capacitif - Google Patents

Capteur de proximité capacitif Download PDF

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Publication number
FR3123525B1
FR3123525B1 FR2105382A FR2105382A FR3123525B1 FR 3123525 B1 FR3123525 B1 FR 3123525B1 FR 2105382 A FR2105382 A FR 2105382A FR 2105382 A FR2105382 A FR 2105382A FR 3123525 B1 FR3123525 B1 FR 3123525B1
Authority
FR
France
Prior art keywords
average
proximity sensor
voltage
capacitive proximity
detection
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.)
Active
Application number
FR2105382A
Other languages
English (en)
Other versions
FR3123525A1 (fr
Inventor
Xavier Hourne
Cédric Vergnieres
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
Original Assignee
Vitesco Technologies
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 Vitesco Technologies filed Critical Vitesco Technologies
Priority to FR2105382A priority Critical patent/FR3123525B1/fr
Priority to FR2204398A priority patent/FR3123436B1/fr
Priority to PCT/EP2022/062566 priority patent/WO2022248207A1/fr
Priority to CN202280034479.3A priority patent/CN117296251A/zh
Publication of FR3123525A1 publication Critical patent/FR3123525A1/fr
Application granted granted Critical
Publication of FR3123525B1 publication Critical patent/FR3123525B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • H03K2217/960705—Safety of capacitive touch and proximity switches, e.g. increasing reliability, fail-safe
    • 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
    • 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
    • H03K2217/960735—Capacitive touch switches characterised by circuit details
    • H03K2217/960745—Capacitive differential; e.g. comparison with reference capacitance

Landscapes

  • Electronic Switches (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

L’invention concerne un capteur (1) de proximité capacitif comprenant un circuit de détection (10), comprenant une capacité de détection (Ce), une capacité de stockage (Cext) et des interrupteurs (T1, T2, T3, T4, T5), un générateur de tension continue (Vcc) et un microcontrôleur (20) configuré pour commander les interrupteurs (T1, T2, T3, T4, T5) et pour : obtenir une valeur de tension aux bornes de la capacité de stockage (Cext) et aux bornes de la capacité de détection (Ce),calculer une première moyenne définie par la moyenne des valeurs de tension obtenues à la fin de chaque itération d’une première phase d’acquisition et une deuxième moyenne définie par la moyenne des valeurs de tension à la fin de chaque itération d’une deuxième phase d’acquisition,détecter une présence humaine lorsque la différence entre la première moyenne et la deuxième moyenne est supérieure à un seuil de détection prédéfini. Figure pour l’abrégé : Fig 1
FR2105382A 2021-05-25 2021-05-25 Capteur de proximité capacitif Active FR3123525B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FR2105382A FR3123525B1 (fr) 2021-05-25 2021-05-25 Capteur de proximité capacitif
FR2204398A FR3123436B1 (fr) 2021-05-25 2022-05-10 Capteur de proximité capacitif
PCT/EP2022/062566 WO2022248207A1 (fr) 2021-05-25 2022-05-10 Capteur de proximite capacitif
CN202280034479.3A CN117296251A (zh) 2021-05-25 2022-05-10 电容接近传感器

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2105382A FR3123525B1 (fr) 2021-05-25 2021-05-25 Capteur de proximité capacitif
FR2105382 2021-05-25

Publications (2)

Publication Number Publication Date
FR3123525A1 FR3123525A1 (fr) 2022-12-02
FR3123525B1 true FR3123525B1 (fr) 2023-04-14

Family

ID=76601434

Family Applications (2)

Application Number Title Priority Date Filing Date
FR2105382A Active FR3123525B1 (fr) 2021-05-25 2021-05-25 Capteur de proximité capacitif
FR2204398A Active FR3123436B1 (fr) 2021-05-25 2022-05-10 Capteur de proximité capacitif

Family Applications After (1)

Application Number Title Priority Date Filing Date
FR2204398A Active FR3123436B1 (fr) 2021-05-25 2022-05-10 Capteur de proximité capacitif

Country Status (3)

Country Link
CN (1) CN117296251A (fr)
FR (2) FR3123525B1 (fr)
WO (1) WO2022248207A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111953823A (zh) * 2020-07-29 2020-11-17 北京小米移动软件有限公司 接近传感器状态检测方法、装置及终端

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9257980B2 (en) * 2011-10-06 2016-02-09 Microchip Technology Incorporated Measuring capacitance of a capacitive sensor with a microcontroller having digital outputs for driving a guard ring
US9071264B2 (en) * 2011-10-06 2015-06-30 Microchip Technology Incorporated Microcontroller with sequencer driven analog-to-digital converter
US9542051B2 (en) * 2014-10-24 2017-01-10 Microchip Technology Incorporated Analog elimination of ungrounded conductive objects in capacitive sensing
FR3085177B1 (fr) * 2018-08-21 2020-10-30 Continental Automotive France Dispositif de detection de la presence d'un utilisateur pour le deverrouillage d'un ouvrant de vehicule automobile

Also Published As

Publication number Publication date
CN117296251A (zh) 2023-12-26
FR3123436B1 (fr) 2024-05-31
FR3123436A1 (fr) 2022-12-02
WO2022248207A1 (fr) 2022-12-01
FR3123525A1 (fr) 2022-12-02

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