SE7910055L - ELECTROOPTICAL INSTRUMENTS - Google Patents

ELECTROOPTICAL INSTRUMENTS

Info

Publication number
SE7910055L
SE7910055L SE7910055A SE7910055A SE7910055L SE 7910055 L SE7910055 L SE 7910055L SE 7910055 A SE7910055 A SE 7910055A SE 7910055 A SE7910055 A SE 7910055A SE 7910055 L SE7910055 L SE 7910055L
Authority
SE
Sweden
Prior art keywords
optical
led
leg
barometer
oscillator
Prior art date
Application number
SE7910055A
Other languages
Unknown language ( )
Swedish (sv)
Inventor
A J Demaria
Original Assignee
United Technologies Corp
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 United Technologies Corp filed Critical United Technologies Corp
Publication of SE7910055L publication Critical patent/SE7910055L/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
    • G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
    • G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
    • G01F1/37—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction the pressure or differential pressure being measured by means of communicating tubes or reservoirs with movable fluid levels, e.g. by U-tubes
    • G01F1/372—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction the pressure or differential pressure being measured by means of communicating tubes or reservoirs with movable fluid levels, e.g. by U-tubes with electrical or electro-mechanical indication
    • 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
    • G01D5/26—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 characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
    • G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
    • G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
    • G01F1/40—Details of construction of the flow constriction devices
    • G01F1/46—Pitot tubes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K5/00—Measuring temperature based on the expansion or contraction of a material
    • G01K5/02—Measuring temperature based on the expansion or contraction of a material the material being a liquid
    • G01K5/18—Measuring temperature based on the expansion or contraction of a material the material being a liquid with electric conversion means for final indication
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/0033—Transmitting or indicating the displacement of bellows by electric, electromechanical, magnetic, or electromagnetic means
    • G01L9/0039—Transmitting or indicating the displacement of bellows by electric, electromechanical, magnetic, or electromagnetic means using photoelectric means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/0041—Transmitting or indicating the displacement of flexible diaphragms
    • G01L9/0076—Transmitting or indicating the displacement of flexible diaphragms using photoelectric means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/0041—Transmitting or indicating the displacement of flexible diaphragms
    • G01L9/0076—Transmitting or indicating the displacement of flexible diaphragms using photoelectric means
    • G01L9/0077—Transmitting or indicating the displacement of flexible diaphragms using photoelectric means for measuring reflected light
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/0091—Transmitting or indicating the displacement of liquid mediums by electrical, electromechanical, magnetic or electromagnetic means
    • G01L9/0097—Transmitting or indicating the displacement of liquid mediums by electrical, electromechanical, magnetic or electromagnetic means using photoelectric means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Electromagnetism (AREA)
  • Measuring Fluid Pressure (AREA)
  • Optical Transform (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Optical Radar Systems And Details Thereof (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Level Indicators Using A Float (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Abstract

An rf oscillator comprising an electric circuit and an optical leg is used to measure physical variables capable of changing the length of the optical leg. In the circuitry, a beam of amplitude modulated radiation returning from the optical leg is converted to an electric signal, amplified, and used to modulate the drive of an LED which emits a beam of optical radiation. The beam is delivered to and returned from a reflective surface at the end of the optical path by waveguide means, phase shifts in the beam due to actual or effective changes in the pathlength of the optical leg are converted to corresponding shifts in the frequency of the oscillator. Details are given of using this in a fluid barometer, differential pressure sensor, fluid velocimeter, Pitot tube, shift position locator and in temperature sensors. Fig. 2 shows the barometer, where the modulated beam from LED 16 is passed to the reflective surface 60 of liquid 54 by fibre optic waveguide 44, the returning beam being separated by beam-splitter 26 and passed to detector 22 which modulates the LED via amplifier 20; the resonant frequency varies with the length of path 58 and hence with atmospheric pressure. <IMAGE>
SE7910055A 1978-12-13 1979-12-06 ELECTROOPTICAL INSTRUMENTS SE7910055L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US96894878A 1978-12-13 1978-12-13

Publications (1)

Publication Number Publication Date
SE7910055L true SE7910055L (en) 1980-06-14

Family

ID=25514975

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7910055A SE7910055L (en) 1978-12-13 1979-12-06 ELECTROOPTICAL INSTRUMENTS

Country Status (8)

Country Link
JP (1) JPS5582917A (en)
CA (1) CA1130108A (en)
DE (1) DE2950209A1 (en)
FR (1) FR2444258A1 (en)
GB (1) GB2040131A (en)
IL (1) IL58895A0 (en)
IT (1) IT1127732B (en)
SE (1) SE7910055L (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57142331U (en) * 1981-02-27 1982-09-07
EP0074055A3 (en) * 1981-09-03 1984-09-12 Honeywell Inc. Fiber optic pressure sensor
DE3236360A1 (en) * 1982-04-16 1983-10-20 Brown, Boveri & Cie Ag, 6800 Mannheim Method and device for monitoring rooms for the presence or absence or the movement of objects
DE3307966A1 (en) * 1983-03-07 1984-09-13 Philips Patentverwaltung Gmbh, 2000 Hamburg Temperature sensor
DE3621009A1 (en) * 1986-06-23 1988-01-07 Truetzschler & Co DEVICE FOR DETECTING THE LEVEL IN A FIBER MATERIAL STORAGE, ESPECIALLY FOR SPINNING PREPARATION MACHINES
GB8928714D0 (en) * 1989-12-20 1990-11-21 Hunting Eng Ltd Electro-optical devices
DE4213602A1 (en) * 1992-04-24 1993-10-28 Alexander W Dr Ing Koch Temp. measurement using temp. dependent length change of expanding body - dividing beam into sensing and reference beams, directing sensing beam to expanding body and measuring phase difference between beams.
US7642096B2 (en) 2004-12-20 2010-01-05 Massachusetts Institute Of Technology Liquid expansion thermometer and microcalorimeter
DE102011079983A1 (en) * 2011-07-28 2013-01-31 Robert Bosch Gmbh measuring device
FR3044413B1 (en) * 2015-12-01 2017-12-08 Safran FIBER OPTIC MEASURING PROBE

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1449293A (en) * 1965-10-05 1966-08-12 Bolkow Gmbh Device for measuring, using laser beams, the true altitude of a flying body in relation to the earth's surface
DE1807237A1 (en) * 1968-06-26 1970-04-23 Jenoptik Jena Gmbh Electromagnetic distance measuring device
GB1273676A (en) * 1969-09-19 1972-05-10 Zeiss Jena Veb Carl Electro-magnetic distance measuring apparatus
FR2321116A1 (en) * 1975-08-13 1977-03-11 Anvar TEMPERATURE MEASUREMENT PROCESS AND PROBE FOR ITS IMPLEMENTATION

Also Published As

Publication number Publication date
IL58895A0 (en) 1980-03-31
FR2444258A1 (en) 1980-07-11
GB2040131A (en) 1980-08-20
DE2950209A1 (en) 1980-06-26
IT1127732B (en) 1986-05-21
CA1130108A (en) 1982-08-24
JPS5582917A (en) 1980-06-23
IT7928075A0 (en) 1979-12-17

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