GB1277748A - Improvements in or relating to proximity sensing apparatus - Google Patents
Improvements in or relating to proximity sensing apparatusInfo
- 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
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.
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)
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 |
-
1969
- 1969-09-02 GB GB4331669A patent/GB1277748A/en not_active Expired
Cited By (9)
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 |