GB1189981A - Improvements in and relating to Displacement Measuring Devices - Google Patents

Improvements in and relating to Displacement Measuring Devices

Info

Publication number
GB1189981A
GB1189981A GB22333/66A GB2233366A GB1189981A GB 1189981 A GB1189981 A GB 1189981A GB 22333/66 A GB22333/66 A GB 22333/66A GB 2233366 A GB2233366 A GB 2233366A GB 1189981 A GB1189981 A GB 1189981A
Authority
GB
United Kingdom
Prior art keywords
rotor
output
phase
energized
former
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
GB22333/66A
Inventor
Ernest Howbrook
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB22333/66A priority Critical patent/GB1189981A/en
Priority to DE19671623715 priority patent/DE1623715A1/en
Priority to FR106194A priority patent/FR1527255A/en
Publication of GB1189981A publication Critical patent/GB1189981A/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
    • G01D5/243—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 phase or frequency of ac
    • 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)
  • Automation & Control Theory (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

1,189,981. Selsyn machines. E. HOWBROOK. 4 May, 1967 [19 May, 1966], No. 22333/66. Heading H2A. [Also in Division G1] A rotary or linear position transducer has relatively movable input and output windings each wound on an insulating non-magnetic former, the absence of a ferromagnetic core permitting high-frequency energization of the windings; and the input winding consists of three coils 42 on a former 40, Fig. 3, constituting a three-phase stator, for example, and the output winding consists of a coil 38 (or more coils) on a former 34 constituting a rotor. The stator coils are energized from a three-phase source (1, 2, 3, Fig. 1, not shown), the phase of the output of the rotor (4) being compared in a comparator (7) with one of the input phases to give a D.C. measure of displacement. The rotor output alternatively may be fed to an AND gate with one of the input phases, and also with a further higher frequency signal, the gate output being in the form of groups of pulses of the higher frequency, the number of pulses per group being proportional to the phase difference between the other two signals, and hence proportional to the relative displacement of rotor and stator. The output is taken from the rotor 38 by continuous leads if limited displacement only occurs or by slip-rings or inductive coupling. The transducer is contained in a dust core casing. In a follow-up arrangement (Fig. 2, not shown), two transducers (12, 16) are used, having their stators energized from a common three-phase source, the rotor outputs being phase compared in a comparator (19) the output of which controls a motor (21) driving one rotor (18) in response to movement of the other rotor (17) driven by a prime mover (13). A differential resolver may be included between the two transducers (12, 16) to measure relative movement, or the stators (14, 15) may be energized at different frequencies to produce differential rotation of one rotor relative to the other.
GB22333/66A 1966-05-19 1966-05-19 Improvements in and relating to Displacement Measuring Devices Expired GB1189981A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB22333/66A GB1189981A (en) 1966-05-19 1966-05-19 Improvements in and relating to Displacement Measuring Devices
DE19671623715 DE1623715A1 (en) 1966-05-19 1967-05-09 Position measuring device
FR106194A FR1527255A (en) 1966-05-19 1967-05-12 Displacement measuring device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB22333/66A GB1189981A (en) 1966-05-19 1966-05-19 Improvements in and relating to Displacement Measuring Devices
FR106194A FR1527255A (en) 1966-05-19 1967-05-12 Displacement measuring device

Publications (1)

Publication Number Publication Date
GB1189981A true GB1189981A (en) 1970-04-29

Family

ID=26176397

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22333/66A Expired GB1189981A (en) 1966-05-19 1966-05-19 Improvements in and relating to Displacement Measuring Devices

Country Status (2)

Country Link
FR (1) FR1527255A (en)
GB (1) GB1189981A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3857089A (en) * 1972-06-08 1974-12-24 Royal Industries Magnetic position indicator
US4061966A (en) * 1975-01-20 1977-12-06 Ceskoslovenska Akademie Ved Method and apparatus for generating a continuous magnetic field determining the position of an inductive sensing element therein
US4134065A (en) * 1977-01-12 1979-01-09 Pneumo Corporation Transducer for directly converting mechanical displacement to phase information
US4282485A (en) * 1978-05-22 1981-08-04 Pneumo Corporation Linear variable phase transformer with constant magnitude output

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3857089A (en) * 1972-06-08 1974-12-24 Royal Industries Magnetic position indicator
US4061966A (en) * 1975-01-20 1977-12-06 Ceskoslovenska Akademie Ved Method and apparatus for generating a continuous magnetic field determining the position of an inductive sensing element therein
US4134065A (en) * 1977-01-12 1979-01-09 Pneumo Corporation Transducer for directly converting mechanical displacement to phase information
US4282485A (en) * 1978-05-22 1981-08-04 Pneumo Corporation Linear variable phase transformer with constant magnitude output

Also Published As

Publication number Publication date
FR1527255A (en) 1968-05-31

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees