DE2432032A1 - Inductive double-coil measurement transducer - is non-contacting and performs continuous measurement of angular position using eccentric disc - Google Patents

Inductive double-coil measurement transducer - is non-contacting and performs continuous measurement of angular position using eccentric disc

Info

Publication number
DE2432032A1
DE2432032A1 DE2432032A DE2432032A DE2432032A1 DE 2432032 A1 DE2432032 A1 DE 2432032A1 DE 2432032 A DE2432032 A DE 2432032A DE 2432032 A DE2432032 A DE 2432032A DE 2432032 A1 DE2432032 A1 DE 2432032A1
Authority
DE
Germany
Prior art keywords
disc
coils
angular position
change
transducer
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.)
Pending
Application number
DE2432032A
Other languages
German (de)
Inventor
Zdenek Bartunek
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.)
Ustav Pro Vyzkum Motorovych Vozidel
Original Assignee
Ustav Pro Vyzkum Motorovych Vozidel
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 Ustav Pro Vyzkum Motorovych Vozidel filed Critical Ustav Pro Vyzkum Motorovych Vozidel
Priority to DE2432032A priority Critical patent/DE2432032A1/en
Publication of DE2432032A1 publication Critical patent/DE2432032A1/en
Pending 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
    • G01D5/14—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 magnitude of a current or voltage
    • G01D5/20—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 magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G01D5/22—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 magnitude of a current or voltage by varying inductance, e.g. by a movable armature differentially influencing two coils
    • G01D5/2208—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 magnitude of a current or voltage by varying inductance, e.g. by a movable armature differentially influencing two coils by influencing the self-induction of the coils
    • G01D5/2216—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 magnitude of a current or voltage by varying inductance, e.g. by a movable armature differentially influencing two coils by influencing the self-induction of the coils by a movable ferromagnetic element, e.g. a core
    • 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
    • G01D2205/00—Indexing scheme relating to details of means for transferring or converting the output of a sensing member
    • G01D2205/70—Position sensors comprising a moving target with particular shapes, e.g. of soft magnetic targets
    • G01D2205/73—Targets mounted eccentrically with respect to the axis of rotation

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

The transducer has both coils located on a common axis and there is an eccentric disc (5) which is made of ferro-magnetic material. This disc is situated between the coils (1, 2). Pref. the disc is circular or its shape depends on a given desired relationship between the variation in the impedance of the coils and the change in angular position of the disc. The transducer makes it possible to measure mechanical variables in conjunction with carrier frequency amplifiers. The centre of rotation of the disc is midway between the two coils, so that the shape of the disc and its angular position determine the distances 'a' and 'b' between the edges of the disc and the coils.

Description

Doppelspulen-Meßumformer Die Erfindung betrifft einen Doppelspulen-Meßumformer. Double coil measuring transducer The invention relates to a double coil measuring transducer.

Eine der mechanischen Größen, die beim Bewerten von Maschinenteilen geprüft werden müssen, ist die änderung der Winkellage. One of the mechanical quantities that is used when evaluating machine parts need to be checked is the change in the angular position.

Gegenwärtig werden für diese Messungen Meßpotentiometer als Meßumformer der Lageänderung in eine elektrische Größe angewandt, bei denen die Widerstandsänderung der Lageänderung direkt proportional ist, d.h. der änderung der Winkeleinstellung. At present, measuring potentiometers are used as measuring transducers for these measurements the change in position is applied to an electrical quantity in which the change in resistance is directly proportional to the change in position, i.e. the change in the angle setting.

Der Nachteil dieser Meßpotentiometer besteht in der begrenzten Mindestdicke des verwendeten Widerstandsdrahtes, so daß die Widerstandsänderung nicht kontinuierlich, sondern sprunghaft verläuft. Dies wird durch den Übergang des beweglichen Läufers von einer Drahtwindung auf die nächste verursacht. The disadvantage of this measuring potentiometer is the limited minimum thickness of the resistance wire used, so that the change in resistance is not continuous, but runs by leaps and bounds. This is due to the transition of the movable runner from one turn of the wire to the next.

Es ist daher Aufgabe der Erfindung, diese Nachteile zu beseitigen, und zwar durch kontakt lose Ausführung, um eine kontinuierliche Messung der Winkellage ohne unerwünschte Sprünge sicherzustellen. It is therefore the object of the invention to eliminate these disadvantages, by means of a non-contact design, in order to ensure a continuous measurement of the angular position without ensuring unwanted jumps.

Ein mechanisch-elektrischer, induktiver Doppelspulen-Meßumformer mit auf einer gemeinsamen Achse angeordneten Spulen ist erfindungsgemäß dadurch gekennzeichnet, daß zwischen den beiden Spulen eine exzentrische Scheibe aus ferromagnetischem Material angeordnet ist. A mechanical-electrical, inductive double-coil transmitter with coils arranged on a common axis is characterized according to the invention characterized in that between the two coils an eccentric disc made of ferromagnetic Material is arranged.

induktive Der erfindungsgemäße/Meßumformer ermöglicht einen Fühleraufbau, der in Verbiradung mit Trägerfrequenz-Verstärkern zur Messung mechanischer Größen angewandt werden kann. inductive The transducer according to the invention enables a sensor structure, in combination with carrier frequency amplifiers for measuring mechanical quantities can be applied.

Ein Ausführungsbeispiel des erfindungsgemäßen Meßumformers ist in der aus einer einzigen Figur bestehenden Zeichnung abgebildet. An embodiment of the transmitter according to the invention is shown in the drawing consisting of a single figure.

Der erfindungsgemäße Meßumformer weist zwei Spulen 1 und 2 auf. Die beiden Spulen 1 und 2 sind voneinander getrennt und haben Kerne 5 und 4. Die Spulen 1 und 2 sind fest angeordnet, und senkrecht zu ihrer gemeinsamen Achse ist zwischen ihnen eine exzentrische Scheibe 5 aus ferromagnetischem Material angeordnet. Eine in Lagern gelagerte Welle der exzentrischen Scheibe 5 ist mit dem Meßobjekt verbunden. In der Abgleichausgangslage ist die Scheibe 5 so eingestellt, daß die Entfernungen a bzw. b zwischen der Scheibe 5 und den Spulen 1 bzw. 2 gleich und die Spulen 1 und 2 elektrisch abgeglichen sind. Falls ein Drehen der Scheibe 5 infolge Lageänderung des Meßobjekts erfolgt, werden die Entfernungen a und b geändert, so daß die eine größer und die andere um den gleichen Wert kleiner wird. The transmitter according to the invention has two coils 1 and 2. the two coils 1 and 2 are separate from each other and have cores 5 and 4. The coils 1 and 2 are fixed, and perpendicular to their common axis is between arranged them an eccentric disk 5 made of ferromagnetic material. One The shaft of the eccentric disk 5, which is mounted in bearings, is connected to the test object. In the adjustment starting position, the disk 5 is set so that the distances a and b between the disc 5 and the coils 1 and 2 are the same and the coils 1 and 2 are electrically balanced. If the disc 5 rotates as a result of a change in position of the measurement object takes place, the distances a and b are changed so that the one becomes larger and the other becomes smaller by the same amount.

Dadurch wird die Impedanz der beiden Spulen 1 und 2 geändert.This changes the impedance of the two coils 1 and 2.

Die resultierende Impedanzänderung der Spulen 1 und 2, die in Zweigen einer Brückenanordnung liegen, ist der Lageänderung proportional, d.h. der Anderung der Winkeldrehung der Scheibe 5. Durch geeignete Formwahl der Scheibe 5 kann eine lineare Änderung der resultierenden elektrischen Impedanz der Spulen 1 und 2 in Abhängigkeit von der änderung der Winkellage bezüglich des mittleren Abgleichzustandes erreicht werden.The resulting change in impedance of coils 1 and 2, which are in branches a bridge arrangement is proportional to the change in position, i.e. the change the angular rotation of the disk 5. By suitable selection of the shape of the disk 5, a linear change in the resulting electrical impedance of coils 1 and 2 in Dependence on the change in the angular position with respect to the mean balance state can be achieved.

Die Spulen 1 und 2 liegen in benachbarten Zweigen der Brückenanordnung, so daß eine Kompensation bei Temperaturänderungen der Meßumformer-Temperatur erfolgt. The coils 1 and 2 are in adjacent branches of the bridge arrangement, so that a compensation takes place in the event of temperature changes in the transmitter temperature.

Der erfindungsgemäße Meßumformer kann beim Bau von Fühlern angewandt werden, die direkt eine Änderung der Winkellage messen, und auch bei Fühlern für Winkelbeschleunigung oder -verzögerung, ferner bei Fühlern zur Erfassung von Torsionsschwingungen od. dgl. The transmitter according to the invention can be used in the construction of sensors that directly measure a change in the angular position, and also with sensors for Angular acceleration or deceleration, as well as sensors for detecting torsional vibrations or the like

Claims (1)

Patentansprüche Claims 1. Mechanisch-elektrischer, induktiver Doppelspulen-Meßumormer mit auf einer gemeinsamen Achse angeordneten Spulen, d a d u r c h g e k e n n z e i c h n e t, daß zwischen den beiden Spulen (1, 2) eine exzentrische Scheibe (5) aus ferromagnetischem Material angeordnet ist. 1. Mechanical-electrical, inductive double-coil measuring transducer with coils arranged on a common axis, d a d u r c h e k e n n n z e i c h n e t that between the two coils (1, 2) an eccentric disc (5) from ferromagnetic material is arranged. 2. Doppelspulen-Meßumformer nach Anspruch 1, dadurch gekennzeichnet, daß die Scheibe (5) ein kreisförmiger Exzenter ist. 2. Double coil measuring transducer according to claim 1, characterized in that that the disc (5) is a circular eccentric. 5. Doppelspulen-Meßumformer nach Anspruch 1, dadurch gekennzeichnet, daß die Scheibe (5) eine Form aufweist, die von einer gewünschten Beziehung zwischen der Anderung der elektrischen Impedanz der Spulen (1, 2) und der änderung der Winkellage der Scheibe (5) abhängt. 5. Double coil transmitter according to claim 1, characterized in that that the disc (5) has a shape that is of a desired relationship between the change in the electrical impedance of the coils (1, 2) and the change in the angular position the disk (5) depends.
DE2432032A 1974-07-03 1974-07-03 Inductive double-coil measurement transducer - is non-contacting and performs continuous measurement of angular position using eccentric disc Pending DE2432032A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE2432032A DE2432032A1 (en) 1974-07-03 1974-07-03 Inductive double-coil measurement transducer - is non-contacting and performs continuous measurement of angular position using eccentric disc

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2432032A DE2432032A1 (en) 1974-07-03 1974-07-03 Inductive double-coil measurement transducer - is non-contacting and performs continuous measurement of angular position using eccentric disc

Publications (1)

Publication Number Publication Date
DE2432032A1 true DE2432032A1 (en) 1976-01-22

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Family Applications (1)

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DE2432032A Pending DE2432032A1 (en) 1974-07-03 1974-07-03 Inductive double-coil measurement transducer - is non-contacting and performs continuous measurement of angular position using eccentric disc

Country Status (1)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2738011A1 (en) * 1977-08-23 1979-03-01 Vnii Str I Doroschnogo Mash Vn Inductive transducer to convert relative motion of objects - forms electrical signals by use of main and auxiliary coil screens connected to object in gap between coils
DE3141015A1 (en) * 1980-10-21 1982-06-09 Kabushiki Kaisha SG, Kokubunji, Tokyo "TURNING ANGLE DETECTOR"
FR2644240A1 (en) * 1989-03-07 1990-09-14 Roulements Soc Nouvelle Inductive angular position sensor
FR2677757A1 (en) * 1991-06-13 1992-12-18 Sagem Absolute angular position sensor with variable reluctance
EP0544575A1 (en) 1991-11-26 1993-06-02 Sagem Sa Variable reluctance absolute angular position sensor
US5265733A (en) * 1989-02-22 1993-11-30 Hadewe B.V. Method of checking the composition of multilayer units composed of sheetlike parts and apparatus for composing, and checking the composition of, such units
US5526939A (en) * 1989-02-22 1996-06-18 Hadewe B.V. Method of checking the composition of multilayer units composed of sheetlike parts and apparatus for composing, and checking the composition of, such units

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2738011A1 (en) * 1977-08-23 1979-03-01 Vnii Str I Doroschnogo Mash Vn Inductive transducer to convert relative motion of objects - forms electrical signals by use of main and auxiliary coil screens connected to object in gap between coils
DE3141015A1 (en) * 1980-10-21 1982-06-09 Kabushiki Kaisha SG, Kokubunji, Tokyo "TURNING ANGLE DETECTOR"
US5265733A (en) * 1989-02-22 1993-11-30 Hadewe B.V. Method of checking the composition of multilayer units composed of sheetlike parts and apparatus for composing, and checking the composition of, such units
US5526939A (en) * 1989-02-22 1996-06-18 Hadewe B.V. Method of checking the composition of multilayer units composed of sheetlike parts and apparatus for composing, and checking the composition of, such units
FR2644240A1 (en) * 1989-03-07 1990-09-14 Roulements Soc Nouvelle Inductive angular position sensor
FR2677757A1 (en) * 1991-06-13 1992-12-18 Sagem Absolute angular position sensor with variable reluctance
EP0544575A1 (en) 1991-11-26 1993-06-02 Sagem Sa Variable reluctance absolute angular position sensor
US5428290A (en) * 1991-11-26 1995-06-27 Societe D'applications Generales D'electricite Et De Mecanique Sagem Variable reluctance absolute angular position sensor with sectored housing and rotor

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