FR3123525B1 - Capteur de proximité capacitif - Google Patents
Capteur de proximité capacitif Download PDFInfo
- 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
Links
- 239000003990 capacitor Substances 0.000 abstract 4
- 238000001514 detection method Methods 0.000 abstract 4
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
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)
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)
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 |
-
2021
- 2021-05-25 FR FR2105382A patent/FR3123525B1/fr active Active
-
2022
- 2022-05-10 WO PCT/EP2022/062566 patent/WO2022248207A1/fr active Application Filing
- 2022-05-10 CN CN202280034479.3A patent/CN117296251A/zh active Pending
- 2022-05-10 FR FR2204398A patent/FR3123436B1/fr active Active
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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Legal Events
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PLFP | Fee payment |
Year of fee payment: 2 |
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PLSC | Publication of the preliminary search report |
Effective date: 20221202 |
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PLFP | Fee payment |
Year of fee payment: 3 |
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CA | Change of address |
Effective date: 20230623 |
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PLFP | Fee payment |
Year of fee payment: 4 |