CA2374425C - Multiple sensor vehicle occupant detection for air bag deployment control - Google Patents

Multiple sensor vehicle occupant detection for air bag deployment control Download PDF

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Publication number
CA2374425C
CA2374425C CA002374425A CA2374425A CA2374425C CA 2374425 C CA2374425 C CA 2374425C CA 002374425 A CA002374425 A CA 002374425A CA 2374425 A CA2374425 A CA 2374425A CA 2374425 C CA2374425 C CA 2374425C
Authority
CA
Canada
Prior art keywords
antenna electrode
air bag
vehicle occupant
multiple sensor
occupant 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.)
Expired - Fee Related
Application number
CA002374425A
Other languages
French (fr)
Other versions
CA2374425E (en
CA2374425A1 (en
Inventor
Shiuh-An Shieh
Gregory T Thompson
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.)
NEC America Inc
Original Assignee
NEC America Inc
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 NEC America Inc filed Critical NEC America Inc
Priority to CA2531886A priority Critical patent/CA2531886C/en
Publication of CA2374425E publication Critical patent/CA2374425E/en
Publication of CA2374425A1 publication Critical patent/CA2374425A1/en
Application granted granted Critical
Publication of CA2374425C publication Critical patent/CA2374425C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/015—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting the presence or position of passengers, passenger seats or child seats, and the related safety parameters therefor, e.g. speed or timing of airbag inflation in relation to occupant position or seat belt use
    • B60R21/01512—Passenger detection systems
    • B60R21/0153—Passenger detection systems using field detection presence sensors
    • B60R21/01532—Passenger detection systems using field detection presence sensors using electric or capacitive field sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/002—Seats provided with an occupancy detection means mounted therein or thereon

Abstract

A passenger detection system is provided. The passenger detection syste m utilizes an oscillation circuit that causes an antenna electrode to emit an electric field that is disrupted by the electrical characteristics of an object place d on the seat. This disruption alters the current and phase of the signal in the antenna electrode. By comparing the current flowing in the antenna electrode and/or the difference between the phase of the signal in the antenna electrode and the oscillation circuit output signal with predetermined threshold values, it is possible to detect the presence of a passenger in a reliable and inexpensive manner. Environmental sensors are used to make the determination mare accurate. Humidity, moisture and/or grounding condition are detected and used to alt er processing, values or calculations.
CA002374425A 2001-03-02 2002-03-04 Multiple sensor vehicle occupant detection for air bag deployment control Expired - Fee Related CA2374425C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA2531886A CA2531886C (en) 2001-03-02 2002-03-04 Multiple sensor vehicle occupant detection for air bag deployment control

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/798,788 2001-03-02
US09/798,788 US6816077B1 (en) 2001-03-02 2001-03-02 Multiple sensor vehicle occupant detection for air bag deployment control

Related Child Applications (1)

Application Number Title Priority Date Filing Date
CA2531886A Division CA2531886C (en) 2001-03-02 2002-03-04 Multiple sensor vehicle occupant detection for air bag deployment control

Publications (3)

Publication Number Publication Date
CA2374425E CA2374425E (en) 2002-09-02
CA2374425A1 CA2374425A1 (en) 2002-09-02
CA2374425C true CA2374425C (en) 2006-05-30

Family

ID=25174277

Family Applications (2)

Application Number Title Priority Date Filing Date
CA2531886A Expired - Fee Related CA2531886C (en) 2001-03-02 2002-03-04 Multiple sensor vehicle occupant detection for air bag deployment control
CA002374425A Expired - Fee Related CA2374425C (en) 2001-03-02 2002-03-04 Multiple sensor vehicle occupant detection for air bag deployment control

Family Applications Before (1)

Application Number Title Priority Date Filing Date
CA2531886A Expired - Fee Related CA2531886C (en) 2001-03-02 2002-03-04 Multiple sensor vehicle occupant detection for air bag deployment control

Country Status (10)

Country Link
US (3) US6816077B1 (en)
EP (3) EP1236609A1 (en)
JP (2) JP4721608B2 (en)
KR (1) KR100794455B1 (en)
AT (1) ATE453533T1 (en)
BR (1) BR0200575B1 (en)
CA (2) CA2531886C (en)
DE (1) DE60234967D1 (en)
ES (1) ES2338282T3 (en)
MX (1) MXPA02002394A (en)

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Also Published As

Publication number Publication date
US20040199318A1 (en) 2004-10-07
JP2008302930A (en) 2008-12-18
JP4721608B2 (en) 2011-07-13
EP1908624A1 (en) 2008-04-09
CA2374425E (en) 2002-09-02
MXPA02002394A (en) 2004-06-22
JP5021594B2 (en) 2012-09-12
KR100794455B1 (en) 2008-01-16
CA2531886A1 (en) 2002-09-02
BR0200575B1 (en) 2012-02-07
US6816077B1 (en) 2004-11-09
ES2338282T3 (en) 2010-05-05
CA2531886C (en) 2011-01-04
US7102527B2 (en) 2006-09-05
EP1236609A1 (en) 2002-09-04
BR0200575A (en) 2002-12-10
KR20020070848A (en) 2002-09-11
ATE453533T1 (en) 2010-01-15
DE60234967D1 (en) 2010-02-11
JP2002347498A (en) 2002-12-04
CA2374425A1 (en) 2002-09-02
EP1908624B1 (en) 2009-12-30
EP2168808A1 (en) 2010-03-31
US7084763B2 (en) 2006-08-01
US20040196150A1 (en) 2004-10-07

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