LU90237B1 - Capacitive sensor, e.g. for passenger seat monitoring for control of motor vehicle airbag - Google Patents

Capacitive sensor, e.g. for passenger seat monitoring for control of motor vehicle airbag

Info

Publication number
LU90237B1
LU90237B1 LU90237A LU90237A LU90237B1 LU 90237 B1 LU90237 B1 LU 90237B1 LU 90237 A LU90237 A LU 90237A LU 90237 A LU90237 A LU 90237A LU 90237 B1 LU90237 B1 LU 90237B1
Authority
LU
Luxembourg
Prior art keywords
sensing electrode
control
motor vehicle
passenger seat
capacitive sensor
Prior art date
Application number
LU90237A
Other languages
German (de)
Inventor
Laurent Lamesch
Original Assignee
Iee Sarl
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 Iee Sarl filed Critical Iee Sarl
Priority to LU90237A priority Critical patent/LU90237B1/en
Priority to PCT/EP1998/007343 priority patent/WO1999028702A1/en
Priority to EP98963465A priority patent/EP1034412B1/en
Priority to ES98963465T priority patent/ES2175839T3/en
Priority to DE59803939T priority patent/DE59803939D1/en
Application granted granted Critical
Publication of LU90237B1 publication Critical patent/LU90237B1/en

Links

Classifications

    • 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
    • G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
    • G01B7/023—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring distance between sensor and object
    • 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
    • G01B7/003—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring position, not involving coordinate determination
    • 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

Abstract

The sensor has a sensing electrode, a shield grid electrode, which is spaced at a fixed distance from the sensing electrode, and an evaluating circuit. The evaluating circuit has a current-voltage converter connected between the sensing electrode and the shield grid electrode. A first transistor is connected between the current-voltage converter and the sensing electrode in such way, as to minimize a voltage difference between the electrodes. The sensing electrode and the shield grid electrode are connected to the evaluating circuit and the shield grid electrode is subjected to an alternating voltage. The current-voltage converter converts the current flowing from the sensing electrode to earth into a proportionate voltage.
LU90237A 1997-11-28 1998-04-30 Capacitive sensor, e.g. for passenger seat monitoring for control of motor vehicle airbag LU90237B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
LU90237A LU90237B1 (en) 1998-04-30 1998-04-30 Capacitive sensor, e.g. for passenger seat monitoring for control of motor vehicle airbag
PCT/EP1998/007343 WO1999028702A1 (en) 1997-11-28 1998-11-17 Capacitive distance measurement using a non-ideal measuring electrode
EP98963465A EP1034412B1 (en) 1997-11-28 1998-11-17 Capacitive distance measurement using a non-ideal measuring electrode
ES98963465T ES2175839T3 (en) 1997-11-28 1998-11-17 CAPACITIVE DISTANCE MEASUREMENT WITH NON-IDEAL MEASUREMENT HELP.
DE59803939T DE59803939D1 (en) 1997-11-28 1998-11-17 CAPACITIVE DISTANCE MEASUREMENT WITH A NON-IDEAL MEASURING ELECTRODE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU90237A LU90237B1 (en) 1998-04-30 1998-04-30 Capacitive sensor, e.g. for passenger seat monitoring for control of motor vehicle airbag

Publications (1)

Publication Number Publication Date
LU90237B1 true LU90237B1 (en) 1999-11-03

Family

ID=19731750

Family Applications (1)

Application Number Title Priority Date Filing Date
LU90237A LU90237B1 (en) 1997-11-28 1998-04-30 Capacitive sensor, e.g. for passenger seat monitoring for control of motor vehicle airbag

Country Status (1)

Country Link
LU (1) LU90237B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU90358B1 (en) 1999-03-01 2000-09-05 Iee Sarl Device for stopping the expansion of an airbag in a vehicle

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2744785A1 (en) * 1977-10-05 1979-04-12 Robert Buck ELECTRONIC, CONTACTLESS SWITCHING DEVICE
EP0091288A1 (en) * 1982-04-05 1983-10-12 Armco Inc. Non-contact sensor for determining moving flat steel strip shape profile
US4998103A (en) * 1989-04-25 1991-03-05 Cummins Electronics Company, Inc. Electrostatic position sensing angle resolver
EP0448988A1 (en) * 1990-03-27 1991-10-02 FIFE GmbH Apparatus for contactless detection of the position of a moving web
US5337015A (en) * 1993-06-14 1994-08-09 International Business Machines Corporation In-situ endpoint detection method and apparatus for chemical-mechanical polishing using low amplitude input voltage
US5489888A (en) * 1990-11-07 1996-02-06 Precitec Gmbh Sensor system for contactless distance measuring
EP0734986A2 (en) * 1995-03-30 1996-10-02 FIFE GmbH Device for contactless sensing of the position of a running web

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2744785A1 (en) * 1977-10-05 1979-04-12 Robert Buck ELECTRONIC, CONTACTLESS SWITCHING DEVICE
EP0091288A1 (en) * 1982-04-05 1983-10-12 Armco Inc. Non-contact sensor for determining moving flat steel strip shape profile
US4998103A (en) * 1989-04-25 1991-03-05 Cummins Electronics Company, Inc. Electrostatic position sensing angle resolver
EP0448988A1 (en) * 1990-03-27 1991-10-02 FIFE GmbH Apparatus for contactless detection of the position of a moving web
US5489888A (en) * 1990-11-07 1996-02-06 Precitec Gmbh Sensor system for contactless distance measuring
US5337015A (en) * 1993-06-14 1994-08-09 International Business Machines Corporation In-situ endpoint detection method and apparatus for chemical-mechanical polishing using low amplitude input voltage
EP0734986A2 (en) * 1995-03-30 1996-10-02 FIFE GmbH Device for contactless sensing of the position of a running web

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU90358B1 (en) 1999-03-01 2000-09-05 Iee Sarl Device for stopping the expansion of an airbag in a vehicle

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