CA2026919A1 - Velocity change sensor with magnetic field concentrator and director - Google Patents

Velocity change sensor with magnetic field concentrator and director

Info

Publication number
CA2026919A1
CA2026919A1 CA2026919A CA2026919A CA2026919A1 CA 2026919 A1 CA2026919 A1 CA 2026919A1 CA 2026919 A CA2026919 A CA 2026919A CA 2026919 A CA2026919 A CA 2026919A CA 2026919 A1 CA2026919 A1 CA 2026919A1
Authority
CA
Canada
Prior art keywords
sensor
magnetic field
director
magnetic
velocity change
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.)
Granted
Application number
CA2026919A
Other languages
French (fr)
Other versions
CA2026919C (en
Inventor
Harald S. Husby
Allen K. Breed
Ted Thuen
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.)
Breed Automotive Technology Inc
Original Assignee
Breed Automotive Technology 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 Breed Automotive Technology Inc filed Critical Breed Automotive Technology Inc
Publication of CA2026919A1 publication Critical patent/CA2026919A1/en
Application granted granted Critical
Publication of CA2026919C publication Critical patent/CA2026919C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
    • G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
    • G01P15/08—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values
    • G01P15/135—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values by making use of contacts which are actuated by a movable inertial mass
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/14—Switches operated by change of acceleration, e.g. by shock or vibration, inertia switch

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Air Bags (AREA)
  • Sewing Machines And Sewing (AREA)
  • Control Of High-Frequency Heating Circuits (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)

Abstract

An accelerometer for sensing velocity changes particularly suited for passenger restraint systems in a motor vehicle for the deployment of an air bag includes a housing with a magnetic closing element. The magnetic closing element includes a permanent magnet which generates a field around the sensor housing. A restricting element is mounted around the magnet for restricting and concentrating the magnetic field around the sensor. In an alternate embodiment, two similar sensors may be housed in a single enclosure for additional sensitivity. The restrictive elements of the sensors eliminate interference between the sensor magnetic fields.
CA002026919A 1989-10-06 1990-10-04 Velocity change sensor with magnetic field concentrator and director Expired - Fee Related CA2026919C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US418,147 1973-11-21
US41814789A 1989-10-06 1989-10-06

Publications (2)

Publication Number Publication Date
CA2026919A1 true CA2026919A1 (en) 1991-04-07
CA2026919C CA2026919C (en) 1996-09-03

Family

ID=23656916

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002026919A Expired - Fee Related CA2026919C (en) 1989-10-06 1990-10-04 Velocity change sensor with magnetic field concentrator and director

Country Status (7)

Country Link
JP (1) JPH03125976A (en)
CA (1) CA2026919C (en)
DE (1) DE4031330A1 (en)
FR (1) FR2652907B1 (en)
GB (1) GB2236622B (en)
IT (1) IT1241709B (en)
SE (1) SE500338C2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4218867A1 (en) * 1991-06-11 1992-12-17 Breed Automotive Tech SPEED CHANGE SENSOR WITH A CYLINDRICAL MAGNET
JPH075993U (en) * 1993-07-05 1995-01-27 日本精工株式会社 Starter
DE29619060U1 (en) * 1996-11-02 1998-03-05 Stein, Wolfgang, 63776 Mömbris Device for increasing traffic safety in the flowing traffic of motor vehicles

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3557628A (en) * 1967-12-27 1971-01-26 Toyoda Chuo Kenkyusho Kk Accelerometer
US3737599A (en) * 1971-10-26 1973-06-05 Gulton Ind Inc Acceleration switch with magnetic permeable metal sleeve for shunting magnetic field
DE2620134C2 (en) * 1976-05-07 1986-01-02 Robert Bosch Gmbh, 7000 Stuttgart Device for position detection of moving bodies
US4329549A (en) * 1980-04-29 1982-05-11 Breed Corporation Magnetically biased velocity change sensor
IT1221909B (en) * 1987-04-28 1990-07-12 Fiat Auto Spa PROCEDURE AND MAGNETIC DETECTION DEVICE PARTICULARLY TO DETECT THE ANGULAR MOVEMENT PARAMETERS OF ROTATING ELEMENTS
JPH0697236B2 (en) * 1987-05-30 1994-11-30 株式会社日本自動車部品総合研究所 Acceleration sensor

Also Published As

Publication number Publication date
IT1241709B (en) 1994-01-31
DE4031330A1 (en) 1991-04-11
CA2026919C (en) 1996-09-03
SE9001950D0 (en) 1990-05-31
SE9001950L (en) 1991-04-07
IT9067747A1 (en) 1992-04-02
JPH03125976A (en) 1991-05-29
FR2652907B1 (en) 1994-06-03
GB9021741D0 (en) 1990-11-21
GB2236622A (en) 1991-04-10
IT9067747A0 (en) 1990-10-02
FR2652907A1 (en) 1991-04-12
GB2236622B (en) 1994-05-11
SE500338C2 (en) 1994-06-06

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed