DE2856183A1 - Mechanical or thermo-optical transducer with dielectric waveguide - is coiled around measurement body and uses waveguide attenuation load variation - Google Patents

Mechanical or thermo-optical transducer with dielectric waveguide - is coiled around measurement body and uses waveguide attenuation load variation

Info

Publication number
DE2856183A1
DE2856183A1 DE19782856183 DE2856183A DE2856183A1 DE 2856183 A1 DE2856183 A1 DE 2856183A1 DE 19782856183 DE19782856183 DE 19782856183 DE 2856183 A DE2856183 A DE 2856183A DE 2856183 A1 DE2856183 A1 DE 2856183A1
Authority
DE
Germany
Prior art keywords
waveguide
mechanical
dielectric waveguide
measuring body
measurement
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.)
Withdrawn
Application number
DE19782856183
Other languages
German (de)
Inventor
Hans-Gerd Dipl Ing Dagefoerde
Helmut Dipl Phys Haag
Guenter Dr Ing Thoennessen
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.)
Kabel Rheydt AG
Original Assignee
AEG Telefunken Kabelwerke AG
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 AEG Telefunken Kabelwerke AG filed Critical AEG Telefunken Kabelwerke AG
Priority to DE19782856183 priority Critical patent/DE2856183A1/en
Publication of DE2856183A1 publication Critical patent/DE2856183A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
    • G01L11/02—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by optical means
    • G01L11/025—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by optical means using a pressure-sensitive optical fibre
    • 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
    • G01D5/32—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 with attenuation or whole or partial obturation of beams of light
    • G01D5/34—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 with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/353—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 with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
    • G01D5/3537—Optical fibre sensor using a particular arrangement of the optical fibre itself
    • G01D5/35374—Particular layout of the fiber
    • 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
    • G01D5/32—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 with attenuation or whole or partial obturation of beams of light
    • G01D5/34—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 with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/353—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 with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
    • G01D5/3537—Optical fibre sensor using a particular arrangement of the optical fibre itself
    • G01D5/35377—Means for amplifying or modifying the measured quantity
    • 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
    • G01K5/48—Measuring temperature based on the expansion or contraction of a material the material being a solid
    • G01K5/50—Measuring temperature based on the expansion or contraction of a material the material being a solid arranged for free expansion or contraction
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
    • G01L1/242—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre
    • G01L1/243—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre using means for applying force perpendicular to the fibre axis

Abstract

A mechanical- or thermooptical measurement transducer is arranged to enable nonoptical measurement parameters to be simply detected using optical systems and optically transferred. A measurement body (1) with a non-angular cross-section has a dielectric waveguide (3) wound around it. A light source emits light which passes along the waveguide (3) to a detector which measures the attenuation in the guide. The measurement body may be a solid or hollow cylinder, a slotted tube section, or a tube with elastic walls. The waveguide is clamped at both ends (2) of the coiled section. The measurement body is subjected to the measurement parameter and the waveguide thermal or mechanical loading changes accordingly. This affects the attenuation of the dielectric waveguide.

Description

Mechano- oder thernooptischer MeßwandlerMechano- or therno-optic transducer

Die Erfindung betrifft ei:nen nechano- oder thermooptischen Meßwandler.The invention relates to a mechanical or thermo-optical transducer.

Es liegt ihr die Aufgabe zugrunde eine Anordnung anzugeben, mit der nichtoptische Meßwerte auf einfache Weise nit optischen Hitteln erfaßt und uebertragen werden können.It is her task to provide an arrangement with which non-optical measured values are recorded and transmitted in a simple manner with optical means can be.

Gelöst wird diese Aufgabe erfindungsgemäß durch einen in Abhängigkeit von der Meßgröße sein Volumen ändernden Meßkörper nichteckigen Querschnitts und einen formschlüssig um den Meßkörper gewickelten dielektrischen Wellenleiter, der an eine Lichtquelle und eine Detektoreinrichtung zur Dämpfungsmessung gekoppelt ist. Der Meßkörper kann als massiver oder hohler Zvlinder ausgebildet sein Auch ein geschlitztes Rohrstück oder ein Schlauch mit elastischer Wandung sind als Meßkörper gemäß der Erfindung geeignet.This object is achieved according to the invention by a dependent of the measured variable its volume changing measuring body of non-angular cross-section and a dielectric waveguide wrapped in a form-fitting manner around the measuring body, the coupled to a light source and a detector device for attenuation measurement is. The measuring body can also be designed as a solid or hollow cylinder a slotted piece of pipe or a hose with elastic walls are used as the measuring body suitable according to the invention.

Der dielektrische Wellenleiter ist zweckmäßigerweise an beiden Wicklungsenden kraftschlüssig festgelegt.The dielectric waveguide is expediently at both winding ends firmly fixed.

Die Erfindung macht sich die Abhängigkeit des Volumens eines Meßkörpers von bestimmten physikalischen Größen zunutze.The invention makes the dependence of the volume of a measuring body of certain physical quantities.

Außerdem bedient sie sich der Tatsache, daß die Dämpfung eines dielektrischen Wellenleiters von der mechanischen oder thermischen Belastung des Wellenleiters abhängig ist.It also makes use of the fact that the attenuation of a dielectric Waveguide on the mechanical or thermal load on the waveguide is dependent.

Bei Volumenänderungen des Meßkörpers ändert sich die mechanische Beanspruchung des auf den Meßkörper gewickelten dielektrischen Wellenleiters. Aus den sich daraus ergebenden Dämpfungswerten kann auf die Werte der die Volumenänderungen verursachenden Parameter geschlossen werden. Die durch Volumenänderungen verursachten mechanischen Belastungen wirken dabei axial oder radial auf den Wellenleiter ein.When the volume of the measuring body changes, the mechanical stress changes of the dielectric waveguide wound on the measuring body. From the resulting The resulting damping values can be applied to the values of the ones causing the volume changes Parameters are closed. The mechanical ones caused by volume changes Loads act axially or radially on the waveguide.

Der Vorteil der Erfindung besteht darin, daß die Erfassung und die Ubermittlung der MeSDwerte auf rein optischen Wege erfolgt. Es sind keine mechanischen Systeme und keine metallischen Ubertragungseinrichtungen erforderlich. Der erfindungsgemäße Meßwertwandler ist daher sehr vorteilhaft einsetzbar in Anlagen, welche Hochspannung führen, in explosionsgeschützten Bereichen, in Bereichen mit hohen Störfeldern usw. . Der erfindungsgemäße Meßwertwandler kann zur Bestimmung einer ganzen Reihe physikalischer Größen eingesetzt werden, deren Werte mit dem Volumen oder der Temperatur des Meßkörpers in einem definierten Zusammenhang stehen. Solche Größen sind unter anderem die Stromstirke des durch den Meßkörper fließenden elektrischen StrolsX die ruf den Meßkörper einwirkenden mechanischen Zug- oder Druckkröfte sowie Drücke, die Temperatur von Anordnungen, mit denen der Meßkörper thermisch leitend verbunden ist.The advantage of the invention is that the detection and the The measured values are transmitted in a purely optical manner. They are not mechanical Systems and no metallic transmission equipment required. The inventive The transducer can therefore be used very advantageously in systems that use high voltage lead, in explosion-proof areas, in areas with high interference fields, etc. . The transducer according to the invention can be used to determine a number of physical Sizes are used whose values correspond to the volume or the temperature of the measuring body are in a defined relationship. Such sizes are below among other things, the current strength of the electrical current X flowing through the measuring body the mechanical tensile or compressive forces and pressures acting on the measuring body, the temperature of arrangements with which the measuring body is connected in a thermally conductive manner is.

Der erfindungsgemäße Meßwertwandler wird anhand cer Zeichn1-ng beschrieben, die in Figur 1 eine schematische Seitenansicht und in den Figuren 2 bis 4 Querschnitte durch verschiedene Ausführungsformen zeigt.The transducer according to the invention is described with the aid of drawing 1-ng, In Figure 1 is a schematic side view and in Figures 2 to 4 cross sections shows by different embodiments.

In Figur 1 ist der Meßkörper mit 1 bezeichnet. Der MefDkGrper hat einen nichteckigen, in dargestellten Fall einen runden Querschnitt. Auf den Umfang des NejJjkörpers 1 ist in einer Lage und mehreren Windungen ein dielektrischer Wellenleiter 3 gewickelt, der fest an der Oberflache des Meßkörpers anliegt. Die Enden des dielektrischen Wellenleiters v sind mit Befestigungsmitteln 2 festgelegt. Volumenvergrößerungen des Meßkörpers 1 führen zu einer radialen und einer axialen Belastung des Wellenleiters 3, dessen Dämpfung ein MafS für die Belastung und damit für die Volumenveränderung ist. Die Festlegung der Enden des Wellenleiters verhindert, daß er Volumenänderungen des Meßkörpers folgt.The measuring body is denoted by 1 in FIG. The MefDkGrper has a non-angular, in the case shown has a round cross-section. On the scope of the body 1 is a dielectric waveguide in one layer and with several turns 3 wound, which rests firmly on the surface of the measuring body. The ends of the dielectric Waveguide v are fixed with fastening means 2. Volume enlargements of the measuring body 1 lead to a radial and an axial load on the waveguide 3, the damping of which is a measure of the load and thus of the change in volume is. Fixing the ends of the waveguide prevents it from changing in volume of the measuring body follows.

In Figur 2 ist als Meßkörper ein massiver Zylinder 4 vorgesehen. Die Figur 3 zeigt als Meßkörper ein geschlitztes Rohrstück 5. Mit dieser Anordnung und mit der in Figur 4 gezeigten, wo als Nußkörper ein Schlauch 6 mit elastischer Wandung dient, lassen sich insbesondere innere Drucl;belastungen bestimmen.In Figure 2, a solid cylinder 4 is provided as a measuring body. the FIG. 3 shows a slotted pipe section 5 as the measuring body. With this arrangement and with that shown in Figure 4, where the nut body is a tube 6 with an elastic wall In particular, internal pressures can be determined.

5 Patentansprüche 3 Seiten Beschreibung 1 Blatt Zeichnungen mit vier Figuren Leerselte5 claims 3 pages description 1 sheet of drawings with four characters Empty sack

Claims (5)

P a t eD n t a n s p r ü c h e 1. Mechane- oder thermooptischer Meßwertwandler, g e k e n n z e i c h n e t d u r c h - einen in Abhängigkeit von der Meßgröße sein Volumen ändernden Meßkörper (1, 4, 6) - nichteckigen Querschnitts - und einen furmschlüssig ura den leitkörper gewickelten dielektrischen Wellenleiter (3), - der an eine Lichtquelle - und eine Betektoreinrichtung zur Dämpfungsmessung gekoppelt ist. P a t eD n t a n s p r ü c h e 1. Mechanical or thermo-optical transducer, g e k e n n n z e i c h n e t d u r c h - be a function of the measured variable Volume changing measuring body (1, 4, 6) - non-angular cross-section - and a form fit ura the conductive body wound dielectric waveguide (3) - which is connected to a light source - and an actuator device for attenuation measurement is coupled. 2. Meßwertwandler nach Anspruch 1, dadurch gekennzeichnet, daß der Meßkörper als massiver oder hohler Zylinder ausgebildet ist. 2. transducer according to claim 1, characterized in that the Measuring body is designed as a solid or hollow cylinder. 3. Meßwertwandler nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der MeBRörper (4) als geschlitztes Rohrst ausgebildet ist.3. transducer according to claim 1 or 2, characterized in that that the measuring body (4) is designed as a slotted tubular stem. 4. Meßwertwandler nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, daß der Meßkörper (6) schlauchartig mit elastischer Wandung ausgebildet ist.4. transducer according to claim 1, d a d u r c h g e k e n n z e i c h n e t that the measuring body (6) is designed like a hose with an elastic wall is. 5. Metwertwendler lach einem der ansprüche 1 bis 4, dadurch gekennzeichnet, daß der dielektrische Wellenleiter (3) an beiden Wicklungsenden kraftschlüssig festgelegt ist.5. Metwertwendler laughs one of claims 1 to 4, characterized in that that the dielectric waveguide (3) is non-positively fixed at both winding ends is.
DE19782856183 1978-12-27 1978-12-27 Mechanical or thermo-optical transducer with dielectric waveguide - is coiled around measurement body and uses waveguide attenuation load variation Withdrawn DE2856183A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19782856183 DE2856183A1 (en) 1978-12-27 1978-12-27 Mechanical or thermo-optical transducer with dielectric waveguide - is coiled around measurement body and uses waveguide attenuation load variation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782856183 DE2856183A1 (en) 1978-12-27 1978-12-27 Mechanical or thermo-optical transducer with dielectric waveguide - is coiled around measurement body and uses waveguide attenuation load variation

Publications (1)

Publication Number Publication Date
DE2856183A1 true DE2856183A1 (en) 1980-07-10

Family

ID=6058410

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19782856183 Withdrawn DE2856183A1 (en) 1978-12-27 1978-12-27 Mechanical or thermo-optical transducer with dielectric waveguide - is coiled around measurement body and uses waveguide attenuation load variation

Country Status (1)

Country Link
DE (1) DE2856183A1 (en)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0066493A1 (en) * 1981-05-15 1982-12-08 Schlumberger Limited Pressure wave fiber optic transducer cable
DE3234900A1 (en) * 1982-09-21 1984-03-22 Siemens Ag FIBER OPTICAL SENSOR
DE3236435A1 (en) * 1982-10-01 1984-04-05 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München Sensor
DE3327158A1 (en) * 1983-07-28 1985-02-07 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Detector consisting of a light source, a light receiver and at least one fibre arranged therebetween
FR2550623A1 (en) * 1983-08-13 1985-02-15 British Aerospace FIBER OPTIC GYROSCOPE
DE3334395A1 (en) * 1983-09-23 1985-04-11 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München Optical measuring device for bending and deflection
EP0150576A1 (en) * 1983-11-30 1985-08-07 International Standard Electric Corporation Optical actuator
FR2566907A1 (en) * 1984-06-28 1986-01-03 Flonic Sa Pressure sensor.
US4653331A (en) * 1986-06-20 1987-03-31 The United States Of America As Represented By The Secretary Of The Navy Test apparatus for uniform tensioning of long lengths of small cables in simulated environments
EP0387376A1 (en) * 1989-03-15 1990-09-19 GLÖTZL GESELLSCHAFT FÜR BAUMESSTECHNIK mbH Pressure sensor
DE4114253A1 (en) * 1991-05-02 1992-11-05 Asea Brown Boveri FIBER OPTICAL SENSOR
DE4115370A1 (en) * 1991-05-10 1992-11-26 Asea Brown Boveri Fibre=optic sensor for alternating electric fields or voltages - has piezoelectric element with attached optical fibre carrying two coherent light modes, and also fibre length variation detector
DE4128687A1 (en) * 1991-08-29 1993-03-04 Asea Brown Boveri FIBER OPTICAL SENSOR
DE4216152A1 (en) * 1992-05-15 1993-11-18 Asea Brown Boveri Fiber optic sensor
DE4229449A1 (en) * 1992-09-03 1994-03-10 Abb Research Ltd Fiber optic quartz voltage sensor
DE19743658A1 (en) * 1997-10-02 1999-04-08 Abb Research Ltd Fiber optic voltage sensor for outdoor high voltage systems

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0066493A1 (en) * 1981-05-15 1982-12-08 Schlumberger Limited Pressure wave fiber optic transducer cable
DE3234900A1 (en) * 1982-09-21 1984-03-22 Siemens Ag FIBER OPTICAL SENSOR
DE3236435A1 (en) * 1982-10-01 1984-04-05 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München Sensor
DE3327158A1 (en) * 1983-07-28 1985-02-07 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Detector consisting of a light source, a light receiver and at least one fibre arranged therebetween
FR2550623A1 (en) * 1983-08-13 1985-02-15 British Aerospace FIBER OPTIC GYROSCOPE
DE3334395A1 (en) * 1983-09-23 1985-04-11 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München Optical measuring device for bending and deflection
EP0150576A1 (en) * 1983-11-30 1985-08-07 International Standard Electric Corporation Optical actuator
FR2566907A1 (en) * 1984-06-28 1986-01-03 Flonic Sa Pressure sensor.
US4653331A (en) * 1986-06-20 1987-03-31 The United States Of America As Represented By The Secretary Of The Navy Test apparatus for uniform tensioning of long lengths of small cables in simulated environments
EP0387376A1 (en) * 1989-03-15 1990-09-19 GLÖTZL GESELLSCHAFT FÜR BAUMESSTECHNIK mbH Pressure sensor
DE4114253A1 (en) * 1991-05-02 1992-11-05 Asea Brown Boveri FIBER OPTICAL SENSOR
US5196695A (en) * 1991-05-02 1993-03-23 Asea Brown Boveri Ltd. Fiber-optic sensor having near-field and remote-field signals
DE4115370A1 (en) * 1991-05-10 1992-11-26 Asea Brown Boveri Fibre=optic sensor for alternating electric fields or voltages - has piezoelectric element with attached optical fibre carrying two coherent light modes, and also fibre length variation detector
DE4128687A1 (en) * 1991-08-29 1993-03-04 Asea Brown Boveri FIBER OPTICAL SENSOR
US5339026A (en) * 1991-08-29 1994-08-16 Asea Brown Boveri Ltd. Fiber-optic sensor with first and second bimode fibers
DE4216152A1 (en) * 1992-05-15 1993-11-18 Asea Brown Boveri Fiber optic sensor
US5343036A (en) * 1992-05-15 1994-08-30 Asea Brown Boveri Ltd. Optical measurement of electrical quantities using inverse piezoelectric effect with dual double-mode fiber
DE4229449A1 (en) * 1992-09-03 1994-03-10 Abb Research Ltd Fiber optic quartz voltage sensor
US5475773A (en) * 1992-09-03 1995-12-12 Abb Research Ltd. Fiber-optic quartz voltage sensor
DE19743658A1 (en) * 1997-10-02 1999-04-08 Abb Research Ltd Fiber optic voltage sensor for outdoor high voltage systems
US6140810A (en) * 1997-10-02 2000-10-31 Abb Research Ltd. Fiber-optic voltage sensor for outdoor high-voltage installations
DE19743658B4 (en) * 1997-10-02 2007-02-08 Abb Research Ltd. Fiber optic voltage sensor

Similar Documents

Publication Publication Date Title
DE2856183A1 (en) Mechanical or thermo-optical transducer with dielectric waveguide - is coiled around measurement body and uses waveguide attenuation load variation
DE3823684C1 (en)
DE3817174C1 (en)
DE2326257A1 (en) INDUCTIVE TRANSFER
DE3326332A1 (en) DEVICE FOR DETERMINING THE FUNCTIONING OF A VALVE
DE2914769A1 (en) DEVICE FOR CONTACTLESS DISTANCE MEASUREMENT
DE3518772A1 (en) SENSOR ARRANGEMENT
DE19922102A1 (en) Fibre Bragg grating sensor device for detecting physical dimensions incorporates a light waveguide with fibre Bragg grating fastened under pre-tension between two locking elements
DE2356440A1 (en) Test unit to determine ignition voltage - has amplifier with time constant at least one hundred times greater than ignition impulse
DE2605756A1 (en) PRESSURE MEASURING DEVICE
DE19852182C1 (en) Cable pull distance sensor for full bridge bending measurement and wire strain gauge measurement applies the displacement of a traction rope over a cable drum to convert into spindle axial displacement.
DE2345932C2 (en) Level measuring device for continuous measurement of electrically conductive liquids
DE69831465T2 (en) insulator
DE2213941A1 (en) MEASURING PROBE FOR THE ELECTRICAL DETECTION OF LIQUID LEVELS
DE3215100C2 (en) Measuring device for the detection of multi-axis expansion or pressure conditions
EP0149771B1 (en) Inductive probe flow measuring system
DE3504609C2 (en)
DE2837945C2 (en) Strain transducer
DE2950337C2 (en) Arrangement for continuous measurement of tensile forces
EP0387376B1 (en) Pressure sensor
DE1935183B2 (en) Encoder with an oscillation-free, rod-like element fixed at both ends
DE4200871C1 (en) Determn. of mechanical stress conditions of measuring tubes of flow meter
DE3101958C2 (en) Magnetic-inductive flow meter
DE102007043470A1 (en) Radiation sensor for determining intensity of solar global radiation at black Earth finish, has device provided for heating or cooling absorption layer so that forceable energy is withdrawn or supplied to absorption layer by device
CH662647A5 (en) MEASURING SPIN FOR MEASURING THE INTERNAL DIAMETER OF HOLES.

Legal Events

Date Code Title Description
8127 New person/name/address of the applicant

Owner name: AEG KABEL AG, 4050 MOENCHENGLADBACH, DE

8141 Disposal/no request for examination