GB1277748A - Improvements in or relating to proximity sensing apparatus - Google Patents

Improvements in or relating to proximity sensing apparatus

Info

Publication number
GB1277748A
GB1277748A GB4331669A GB4331669A GB1277748A GB 1277748 A GB1277748 A GB 1277748A GB 4331669 A GB4331669 A GB 4331669A GB 4331669 A GB4331669 A GB 4331669A GB 1277748 A GB1277748 A GB 1277748A
Authority
GB
United Kingdom
Prior art keywords
diode
proximity
transmission line
generator
gunn
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
GB4331669A
Inventor
David William Temple
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.)
Rolls Royce PLC
Original Assignee
Rolls Royce 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 Rolls Royce PLC filed Critical Rolls Royce PLC
Priority to GB4331669A priority Critical patent/GB1277748A/en
Publication of GB1277748A publication Critical patent/GB1277748A/en
Expired 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
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/945—Proximity switches

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length-Measuring Devices Using Wave Or Particle Radiation (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

1277748 Proximity detectors ROLLS-ROYCE Ltd 2 Sept 1969 43316/69 Heading G1N [Also in Division H4] The proximity of an object is indicated by apparatus including a microwave generator connected to one end of a transmission line 26, the other end 34 of which has its impedance affected by the proximity of an object 36, and means for detecting a change in the amplitude of the signal reflected from the end 34 of the line. As shown, the generator includes a Gunn-effect diode D1 mounted in a waveguide 10, and the detector comprises a mixer diode D2. On sensing of an object the level of the D.C. output of the diode D2 is changed and this output may be applied to a pulse shaper and oscilloscope and/or counter. In this manner, the frequency of rotation of the blades of a turbine may be determined. The transmission line is preferably coaxial having a rigid, temperature-resistant end 32, and in alternatives the Gunn-effect diode D1 may be connected in series with the transmission line, which may be a waveguide, or the generator may be a microwave oscillator.
GB4331669A 1969-09-02 1969-09-02 Improvements in or relating to proximity sensing apparatus Expired GB1277748A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4331669A GB1277748A (en) 1969-09-02 1969-09-02 Improvements in or relating to proximity sensing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4331669A GB1277748A (en) 1969-09-02 1969-09-02 Improvements in or relating to proximity sensing apparatus

Publications (1)

Publication Number Publication Date
GB1277748A true GB1277748A (en) 1972-06-14

Family

ID=10428232

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4331669A Expired GB1277748A (en) 1969-09-02 1969-09-02 Improvements in or relating to proximity sensing apparatus

Country Status (1)

Country Link
GB (1) GB1277748A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2471580A1 (en) * 1979-12-11 1981-06-19 Smiths Industries Ltd APPARATUS FOR DETECTING THE PROXIMITY OF TURBINE FINS AND A REFERENCE LOCATION
US4346383A (en) * 1979-08-04 1982-08-24 Emi Limited Checking the location of moving parts in a machine
GB2116803A (en) * 1982-03-16 1983-09-28 Micro Control Tech Ltd Detecting irregularities in rotating masses
DE3643095A1 (en) * 1986-12-17 1988-07-07 Mtu Muenchen Gmbh Device for measuring movement
EP0806680A2 (en) * 1996-05-08 1997-11-12 United Technologies Corporation Microwave air-path clearance sensor
US9000777B2 (en) 2005-12-14 2015-04-07 Hamilton Sunstrand System to measure time of arrival and thickness of rotor blades via microwave energy
US9291069B2 (en) 2007-01-10 2016-03-22 United Technologies Corporation Instrument port seal for RF measurement

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4346383A (en) * 1979-08-04 1982-08-24 Emi Limited Checking the location of moving parts in a machine
FR2471580A1 (en) * 1979-12-11 1981-06-19 Smiths Industries Ltd APPARATUS FOR DETECTING THE PROXIMITY OF TURBINE FINS AND A REFERENCE LOCATION
GB2116803A (en) * 1982-03-16 1983-09-28 Micro Control Tech Ltd Detecting irregularities in rotating masses
DE3643095A1 (en) * 1986-12-17 1988-07-07 Mtu Muenchen Gmbh Device for measuring movement
EP0806680A2 (en) * 1996-05-08 1997-11-12 United Technologies Corporation Microwave air-path clearance sensor
EP0806680A3 (en) * 1996-05-08 1998-07-08 United Technologies Corporation Microwave air-path clearance sensor
US5818242A (en) * 1996-05-08 1998-10-06 United Technologies Corporation Microwave recess distance and air-path clearance sensor
US9000777B2 (en) 2005-12-14 2015-04-07 Hamilton Sunstrand System to measure time of arrival and thickness of rotor blades via microwave energy
US9291069B2 (en) 2007-01-10 2016-03-22 United Technologies Corporation Instrument port seal for RF measurement

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees