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
Grant status
Application
Patent type
Prior art keywords
rare earth
proof mass
earth magnets
servoed accelerometer
utilizing rare
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

Links

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00Magnets
    • H01F7/02Permanent magnets [PM]
    • H01F7/0205Magnetic circuits with PM in general
    • H01F7/021Construction of PM
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P1/00Details of instruments
    • G01P1/006Details of instruments used for thermal compensation
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P15/00Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
    • G01P15/02Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
    • G01P15/08Measuring 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
    • G01P15/13Measuring 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
    • G01P15/132Measuring 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

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)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US84301377 true 1977-10-17 1977-10-17

Publications (2)

Publication Number Publication Date
GB2006439A true 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 (5)

Country Link
JP (1) JPS5459182A (en)
CA (1) CA1096653A (en)
DE (1) DE2833915A1 (en)
FR (1) FR2406202A1 (en)
GB (1) GB2006439B (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 Means for a transducer comprising a fixed structure
FR2558263A1 (en) * 1984-01-12 1985-07-19 Commissariat Energie Atomique directional accelerometer and process for its manufacture by microlithography
FR2567271A1 (en) * 1984-07-05 1986-01-10 Japan Aviation Electron accelerometer
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 (11)

* 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 Means for a transducer comprising a fixed structure
FR2558263A1 (en) * 1984-01-12 1985-07-19 Commissariat Energie Atomique directional accelerometer and process for its manufacture 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 accelerometer
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

Also Published As

Publication number Publication date Type
CA1096653A1 (en) grant
JPS5459182A (en) 1979-05-12 application
DE2833915A1 (en) 1979-04-19 application
FR2406202A1 (en) 1979-05-11 application
GB2006439B (en) 1982-01-20 grant
CA1096653A (en) 1981-03-03 grant

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Legal Events

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