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GB2006439A - Servoed Accelerometer Utilizing Rare Earth Magnets - Google Patents

Servoed Accelerometer Utilizing Rare Earth Magnets

Info

Publication number
GB2006439A
GB2006439A GB7840883A GB7840883A GB2006439A GB 2006439 A GB2006439 A GB 2006439A GB 7840883 A GB7840883 A GB 7840883A GB 7840883 A GB7840883 A GB 7840883A GB 2006439 A GB2006439 A GB 2006439A
Authority
GB
United Kingdom
Prior art keywords
rare earth
earth magnets
proof mass
utilizing rare
servoed
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
GB7840883A
Other versions
GB2006439B (en
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.)
Sundstrand Data Control Inc
Original Assignee
Sundstrand Data Control 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 Sundstrand Data Control Inc filed Critical Sundstrand Data Control Inc
Publication of GB2006439A publication Critical patent/GB2006439A/en
Application granted granted Critical
Publication of GB2006439B publication Critical patent/GB2006439B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/02—Permanent magnets [PM]
    • H01F7/0205—Magnetic circuits with PM in general
    • H01F7/021—Construction of PM
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P1/00—Details of instruments
    • G01P1/006—Details of instruments used for thermal compensation
    • 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
    • G01P15/13—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 measuring the force required to restore a proofmass subjected to inertial forces to a null position
    • G01P15/132—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 measuring the force required to restore a proofmass subjected to inertial forces to a null position with electromagnetic counterbalancing means

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)
  • Micromachines (AREA)
  • Control Of Position Or Direction (AREA)

Abstract

The temperature stability of a servoed accelerometer having a proof mass, a detector means for measuring the deflection of the proof mass, and a restoring means including a coil cooperating with a permanent magnet to restore the proof mass to a null position, is significantly improved by utilizing permanent magnets composed of Co5(GdxSmx-1) where x ranges from 0.20 to 0.55, which has a flux output substantially independent of temperature.
GB7840883A 1977-10-17 1978-10-17 Sorvoed accelerometer utilizing rare earth magnets Expired GB2006439B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US84301377A 1977-10-17 1977-10-17

Publications (2)

Publication Number Publication Date
GB2006439A true GB2006439A (en) 1979-05-02
GB2006439B GB2006439B (en) 1982-01-20

Family

ID=25288833

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7840883A Expired GB2006439B (en) 1977-10-17 1978-10-17 Sorvoed accelerometer utilizing rare earth magnets

Country Status (8)

Country Link
JP (1) JPS5459182A (en)
AU (1) AU3825078A (en)
CA (1) CA1096653A (en)
DE (1) DE2833915A1 (en)
FR (1) FR2406202A1 (en)
GB (1) GB2006439B (en)
IT (1) IT1106152B (en)
SE (1) SE7810693L (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3018027A1 (en) * 1979-05-14 1980-11-27 Honeywell Inf Systems WRITING SYSTEM
FR2468913A2 (en) * 1979-11-05 1981-05-08 Sundstrand Data Control DEVICE FOR A TRANSDUCER HAVING A FIXED STRUCTURE
FR2558263A1 (en) * 1984-01-12 1985-07-19 Commissariat Energie Atomique DIRECTIVE ACCELEROMETER AND METHOD FOR MANUFACTURING THE SAME BY MICROLITHOGRAPHY
FR2567271A1 (en) * 1984-07-05 1986-01-10 Japan Aviation Electron ACCELEROMETRE
FR2594957A1 (en) * 1986-02-21 1987-08-28 Schilling Franz Accelerometer with six degrees of freedom using electromagnetical suspension
FR2637984A1 (en) * 1988-10-19 1990-04-20 Sagem Pendulum accelerometer controlled by electrostatic detection
EP0386942A2 (en) * 1989-03-09 1990-09-12 Automotive Systems Laboratory Inc. Accelerometer with dualmagnet sensing mass
EP3239724A1 (en) * 2016-04-25 2017-11-01 Honeywell International Inc. Reducing bias in an accelerometer via a pole piece

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5060039A (en) * 1988-01-13 1991-10-22 The Charles Stark Draper Laboratory, Inc. Permanent magnet force rebalance micro accelerometer

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3702073A (en) * 1969-02-28 1972-11-07 Sundstrand Data Control Accelerometer

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3018027A1 (en) * 1979-05-14 1980-11-27 Honeywell Inf Systems WRITING SYSTEM
FR2468913A2 (en) * 1979-11-05 1981-05-08 Sundstrand Data Control DEVICE FOR A TRANSDUCER HAVING A FIXED STRUCTURE
FR2558263A1 (en) * 1984-01-12 1985-07-19 Commissariat Energie Atomique DIRECTIVE ACCELEROMETER AND METHOD FOR MANUFACTURING THE SAME BY MICROLITHOGRAPHY
EP0149572A1 (en) * 1984-01-12 1985-07-24 Commissariat A L'energie Atomique Directional accelerometer and process for producing it by microlithography
US4653326A (en) * 1984-01-12 1987-03-31 Commissariat A L'energie Atomique Directional accelerometer and its microlithographic fabrication process
FR2567271A1 (en) * 1984-07-05 1986-01-10 Japan Aviation Electron ACCELEROMETRE
FR2594957A1 (en) * 1986-02-21 1987-08-28 Schilling Franz Accelerometer with six degrees of freedom using electromagnetical suspension
FR2637984A1 (en) * 1988-10-19 1990-04-20 Sagem Pendulum accelerometer controlled by electrostatic detection
EP0386942A2 (en) * 1989-03-09 1990-09-12 Automotive Systems Laboratory Inc. Accelerometer with dualmagnet sensing mass
EP0386942A3 (en) * 1989-03-09 1992-11-25 Automotive Systems Laboratory Inc. Accelerometer with dualmagnet sensing mass
EP3239724A1 (en) * 2016-04-25 2017-11-01 Honeywell International Inc. Reducing bias in an accelerometer via a pole piece
US10161956B2 (en) 2016-04-25 2018-12-25 Honeywell International Inc. Reducing bias in an accelerometer via a pole piece

Also Published As

Publication number Publication date
IT1106152B (en) 1985-11-11
SE7810693L (en) 1979-04-18
FR2406202A1 (en) 1979-05-11
AU3825078A (en) 1980-01-24
JPS5459182A (en) 1979-05-12
CA1096653A (en) 1981-03-03
GB2006439B (en) 1982-01-20
DE2833915A1 (en) 1979-04-19
IT7851491A0 (en) 1978-10-13

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee