GB800131A - Improvements relating to electromagnetic pick-offs - Google Patents

Improvements relating to electromagnetic pick-offs

Info

Publication number
GB800131A
GB800131A GB921654A GB921654A GB800131A GB 800131 A GB800131 A GB 800131A GB 921654 A GB921654 A GB 921654A GB 921654 A GB921654 A GB 921654A GB 800131 A GB800131 A GB 800131A
Authority
GB
United Kingdom
Prior art keywords
windings
pick
members
magnetic
magnetic circuits
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
Application number
GB921654A
Inventor
Alfred John Bourne
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.)
Ferranti International PLC
Original Assignee
Ferranti PLC
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 Ferranti PLC filed Critical Ferranti PLC
Priority to GB921654A priority Critical patent/GB800131A/en
Publication of GB800131A publication Critical patent/GB800131A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G01D5/20—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 inductance, e.g. by a movable armature
    • G01D5/22—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 inductance, e.g. by a movable armature differentially influencing two coils
    • G01D5/2208—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 inductance, e.g. by a movable armature differentially influencing two coils by influencing the self-induction of the coils
    • G01D5/2216—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 inductance, e.g. by a movable armature differentially influencing two coils by influencing the self-induction of the coils by a movable ferromagnetic element, e.g. a core
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
    • G01C19/02—Rotary gyroscopes
    • G01C19/04—Details
    • G01C19/28—Pick-offs, i.e. devices for taking-off an indication of the displacement of the rotor axis
    • 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
    • G01D5/20—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 inductance, e.g. by a movable armature
    • G01D5/22—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 inductance, e.g. by a movable armature differentially influencing two coils
    • G01D5/225—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 inductance, e.g. by a movable armature differentially influencing two coils by influencing the mutual induction between the two coils
    • G01D5/2258—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 inductance, e.g. by a movable armature differentially influencing two coils by influencing the mutual induction between the two coils by a movable ferromagnetic element, e.g. core
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D3/00—Control of position or direction
    • G05D3/12—Control of position or direction using feedback
    • G05D3/14—Control of position or direction using feedback using an analogue comparing device

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Automation & Control Theory (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

800,131. Electric transducers. FERRANTI, Ltd. March 24, 1955 [March 30, 1954], No. 9216/54. Class 40 (1). An electro-magnetic pick-off is of the type having two members of magnetic material designed for relative movement in either a plane or on part of the surface of an imaginary sphere, and defining between them four magnetic circuits each having a pick-off winding individual to it so that movement of one member relative to the other affects the relative values of the reluctances of the four magnetic circuits. The fixed member 10, Fig. 1, carries all the windings and may include an inner limb 12 carrying a primary winding, the centre line 13 of which limb 12 is aligned on a point about which the member 11 may swing in two dimensions. The limbs are joined by a yoke 19 and are provided with part-spherical pole faces which are complementary to the lower face of the member 11. In operation, when the member 11 is directly above the pole faces of the limbs the reluctances of all four magnetic circuits are equal. If member 11 now moves slightly, Fig. 3, the reluctance values will be altered and a correcting error signal developed. Similarly a signal will be developed when member 11 moves in the opposite direction. In a modification the wound member may move, or both members may move, and the members may be curved otherwise than in Fig. 1 or be flat. Where the pick-off includes a primary winding as in Fig. 1 then the four other windings are connected in series opposed pairs, but where no primary is included the four windings are in series-opposed pairs as before and each pair is connected with two resistors as a bridge, the signal in respect of each pair being taken between the common point of the two windings and the common point of the two resistors whilst the supply voltage is applied across the other two points of the bridge.
GB921654A 1954-03-30 1954-03-30 Improvements relating to electromagnetic pick-offs Expired GB800131A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB921654A GB800131A (en) 1954-03-30 1954-03-30 Improvements relating to electromagnetic pick-offs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB921654A GB800131A (en) 1954-03-30 1954-03-30 Improvements relating to electromagnetic pick-offs

Publications (1)

Publication Number Publication Date
GB800131A true GB800131A (en) 1958-08-20

Family

ID=9867647

Family Applications (1)

Application Number Title Priority Date Filing Date
GB921654A Expired GB800131A (en) 1954-03-30 1954-03-30 Improvements relating to electromagnetic pick-offs

Country Status (1)

Country Link
GB (1) GB800131A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0172998A1 (en) * 1984-05-30 1986-03-05 DEUTSCHE FORSCHUNGSANSTALT FÜR LUFT- UND RAUMFAHRT e.V. Inductive sensor and process for the contactless determination of the position in three dimensions of holes, bores, bolts, rivets and the like within pieces of metal by means of such a sensor
US5816894A (en) * 1994-12-16 1998-10-06 Hitachi Metals, Ltd. Gap-providing ferrite core half and method for producing same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0172998A1 (en) * 1984-05-30 1986-03-05 DEUTSCHE FORSCHUNGSANSTALT FÜR LUFT- UND RAUMFAHRT e.V. Inductive sensor and process for the contactless determination of the position in three dimensions of holes, bores, bolts, rivets and the like within pieces of metal by means of such a sensor
US5816894A (en) * 1994-12-16 1998-10-06 Hitachi Metals, Ltd. Gap-providing ferrite core half and method for producing same
US6232864B1 (en) * 1994-12-16 2001-05-15 Hitachi Metals, Ltd. Gap-providing ferrite core half and method for producing same

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