BR9811837A - Processo para a determinação de capacidades muito pequenas e sensor assim projetado - Google Patents

Processo para a determinação de capacidades muito pequenas e sensor assim projetado

Info

Publication number
BR9811837A
BR9811837A BR9811837-4A BR9811837A BR9811837A BR 9811837 A BR9811837 A BR 9811837A BR 9811837 A BR9811837 A BR 9811837A BR 9811837 A BR9811837 A BR 9811837A
Authority
BR
Brazil
Prior art keywords
sensor
capacity
determining
way
measurement capacitors
Prior art date
Application number
BR9811837-4A
Other languages
English (en)
Portuguese (pt)
Inventor
Paul-Werner Von Basse
Josef Willer
Thomas Scheiter
Stephan Marksteiner
Original Assignee
Siemens Ag
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 Siemens Ag filed Critical Siemens Ag
Publication of BR9811837A publication Critical patent/BR9811837A/pt

Links

Classifications

    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1306—Sensors therefor non-optical, e.g. ultrasonic or capacitive sensing
BR9811837-4A 1997-08-05 1998-07-23 Processo para a determinação de capacidades muito pequenas e sensor assim projetado BR9811837A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19733865 1997-08-05
PCT/DE1998/002078 WO1999008121A1 (fr) 1997-08-05 1998-07-23 Procede pour determiner de tres faibles capacites et detecteur conçu a cet effet

Publications (1)

Publication Number Publication Date
BR9811837A true BR9811837A (pt) 2000-08-15

Family

ID=7838065

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9811837-4A BR9811837A (pt) 1997-08-05 1998-07-23 Processo para a determinação de capacidades muito pequenas e sensor assim projetado

Country Status (7)

Country Link
EP (1) EP1000362A1 (fr)
JP (1) JP2001512836A (fr)
KR (1) KR20010022575A (fr)
CN (1) CN1266494A (fr)
BR (1) BR9811837A (fr)
MX (1) MXPA00001276A (fr)
WO (1) WO1999008121A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4511064B2 (ja) * 2001-03-05 2010-07-28 三菱電機株式会社 凹凸検出センサ
DE10333154A1 (de) * 2003-07-22 2005-02-24 Vega Grieshaber Kg Verfahren und Schaltungsanordnung zum Auswerten einer Messkapazität
JP4036798B2 (ja) * 2003-07-29 2008-01-23 アルプス電気株式会社 容量検出回路および検出方法並びに指紋センサ
US7075316B2 (en) * 2003-10-02 2006-07-11 Alps Electric Co., Ltd. Capacitance detector circuit, capacitance detection method, and fingerprint sensor using the same
CN100394202C (zh) * 2006-01-24 2008-06-11 东北大学 高压交流激励法微小电容测量电路
CN101526989B (zh) * 2008-03-06 2011-02-09 奇景光电股份有限公司 电容式指纹感应器及其面板
FR2938344B1 (fr) * 2008-11-07 2010-11-19 Continental Automotive France Dispositif de mesure d'une variation de la capacitance d'une structure capacitive variable
JP5874505B2 (ja) * 2012-04-10 2016-03-02 オムロン株式会社 振動エネルギー検出装置、振動エネルギー検出システム
CN103679163B (zh) * 2012-09-18 2017-03-22 成都方程式电子有限公司 新型电容式指纹图像采集系统
CN105631432B (zh) * 2016-01-04 2020-12-08 京东方科技集团股份有限公司 指纹探测电路及驱动方法和显示装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4039940A (en) * 1976-07-30 1977-08-02 General Electric Company Capacitance sensor
FR2675583B1 (fr) * 1991-04-18 1993-08-27 Marelli Autronica Procede et dispositif de mesure de condensateur.
US5907627A (en) * 1995-11-06 1999-05-25 Dew Engineering And Development Limited Contact imaging device

Also Published As

Publication number Publication date
EP1000362A1 (fr) 2000-05-17
KR20010022575A (ko) 2001-03-26
JP2001512836A (ja) 2001-08-28
CN1266494A (zh) 2000-09-13
MXPA00001276A (es) 2002-03-27
WO1999008121A1 (fr) 1999-02-18

Similar Documents

Publication Publication Date Title
BR9811837A (pt) Processo para a determinação de capacidades muito pequenas e sensor assim projetado
RU2216027C2 (ru) Способ определения очень малых емкостей и его применение
DE60132460D1 (de) Sensoreinheit, insbesondere für Fingerabdrucksensoren
DK1567057T3 (da) Detektering af levende finger ved hjælp af firepunktsmåling af kompleks impedans
US7525304B1 (en) Measurement of effective capacitance
US7259573B2 (en) Surface capacitance sensor system using buried stimulus electrode
BR0005689A (pt) Controle de carga de fotorreceptor
Rice et al. Appropriate roles of cardiac troponins in evaluating patients with chest pain
WO2008142857A1 (fr) Circuit intégré semi-conducteur
Johnston A cylindrical model for studying subendocardial ischaemia in the left ventricle
ATE236408T1 (de) Messverfahren für kapazitives messsystem
WO2018145255A1 (fr) Terminal intelligent, capteur d'empreintes digitales capacitif et module de détection associé
JP3333959B2 (ja) 表面形状認識用センサ回路
Ghafar-Zadeh et al. A CMOS-based capacitive sensor for laboratory-on-chips: Design and experimental results
Aliau-Bonet et al. A fast method to estimate body capacitance to ground at mid frequencies
JP4102672B2 (ja) 埋込式刺激電極を用いる表面静電容量センサシステム
Leme et al. CMOS absolute value precision capacitance measurement system
US11906559B2 (en) Enhanced impedance measurement using CTMU
RU1818526C (ru) Способ измерени шероховатости электропроводной поверхности
KR100302869B1 (ko) 캐패시터배열구조를이용한2차원적이미지감지장치
AU2002314746B2 (en) Improved Drying End Point Meter And Method Of Measuring Moisture Content
Mohammadi et al. Current-sensing device for completion detection
JP3488182B2 (ja) 表面形状認識センサ装置
WO2022271616A1 (fr) Mesure d'impédance améliorée à l'aide d'une unité de mesure de temps de charge
AT503742B8 (de) Elektronische biosensoranordnung

Legal Events

Date Code Title Description
FA10 Dismissal: dismissal - article 33 of industrial property law
B11Y Definitive dismissal - extension of time limit for request of examination expired [chapter 11.1.1 patent gazette]