DE1931341U - INDUCTIVE LENGTH KNIFE. - Google Patents
INDUCTIVE LENGTH KNIFE.Info
- Publication number
- DE1931341U DE1931341U DEJ11779U DEJ0011779U DE1931341U DE 1931341 U DE1931341 U DE 1931341U DE J11779 U DEJ11779 U DE J11779U DE J0011779 U DEJ0011779 U DE J0011779U DE 1931341 U DE1931341 U DE 1931341U
- Authority
- DE
- Germany
- Prior art keywords
- coils
- cutouts
- poles
- package
- excitation
- 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
- 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
- G01D5/2006—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 by influencing the self-induction of one or more coils
- G01D5/2013—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 by influencing the self-induction of one or more 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
- 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
- G01D5/204—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 by influencing the mutual induction between two or more coils
- G01D5/2046—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 by influencing the mutual induction between two or more coils by a movable ferromagnetic element, e.g. a core
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Description
■ b /ι -ί /ι / /.ι y * >** η Ι η »ι ' /1 / ■ b / ι -ί / ι / /.ι y *> ** η Ι η »ι ' / 1 /
JUNKERS FLUGZEUG- Stuttgart-Zuffenhausen, 5. Juli 1963JUNKERS PLANE- Stuttgart-Zuffenhausen, July 5th, 1963
UND MOTORENWERKE AG. DrW/Sr -UND MOTORENWERKE AG. DrW / Sr -
PG 3090PG 3090
Induktiver LängenmesserInductive length meter
Die Erfindung betrifft einen induktiven Geber oder Wegaufnehmer für statische und dynamische Längenmessungen.The invention relates to an inductive transducer or transducer for static and dynamic length measurements.
Derartige Vorrichtungen weisen freibewegliche Spulen oder Anker auf, durch deren Verschiebung die Kopplung zwischen zwei Spulen, der Erregerspule und der S.ekundärspule (Indikator- oder Signalspule), veränderbar ist. Angestrebt wird dabei eine lineare Abhängigkeit der Signalsteuerspannung von dem Verschiebungsweg der Spule oder des Ankers. .Such devices have freely movable coils or armatures, By shifting them, the coupling between two coils, the excitation coil and the secondary coil (indicator or signal coil) can be changed is. The aim here is a linear dependence of the signal control voltage on the displacement path of the coil or the armature. .
Die Erfindung geht von einem induktiven Geber aus, bei dem innerhalb eines hochpermeablen Abschirmzylinders zwei Zylinderspulen koaxial angeordnet sind, deren Kopplung durch einen in der Längsachse des , Abschirmzylinders verschiebbaren zentralen Kern steuerbar ist. Bei /; dieser Anordnung sind somit keine ausgeprägt en Pole ferromagnetischen: Materials vorhanden. Die Kopplung erfolgt vielmehr über Luftfelder, Dies hat den Nachteil, daß die Linearität des Ausgangssignals als Funktion des Verschiebungsweges von der Wickelgenauigkeit der Spulen abhängt. Ferner ist die Signalleistung relativ klein, da die durch den Wickelraum bedingte große 'Weglänge für den magnetischen Fluß durch das diamagnetic sehe Medium j^o«# 1) eine vergleichsweise hohe magnetische Durchflutung (Produkt aus Stromstärke und Windungszahl) erfordert.The invention is based on an inductive transmitter in which two cylinder coils are arranged coaxially within a highly permeable shielding cylinder, the coupling of which can be controlled by a central core that is displaceable in the longitudinal axis of the shielding cylinder. At / ; In this arrangement there are therefore no pronounced poles of ferromagnetic material. The coupling takes place rather via air fields. This has the disadvantage that the linearity of the output signal as a function of the displacement depends on the winding accuracy of the coils. Furthermore, the signal power is relatively small, since the long path length caused by the winding space for the magnetic flux through the diamagnetic see medium j ^ o «# 1) requires a comparatively high magnetic flux (product of current strength and number of turns).
Die für die Wirbelstromunterdrückung erwünschte* Lamellierung der Eisenteile kann mit Rücksicht auf die Flußleitung in Achsrichtung des Systems nur in dieser axialen Richtung erfolgen, . was jedoch ausThe desired * lamination of the for eddy current suppression With regard to the flux conduction, iron parts can be moved in the axial direction of the System can only be carried out in this axial direction. what, however, from
konstruktiven Gründen nur in aufwendiger Weise zu verwirklichen ist. Die magnetisch aktiven Teile werden daher durchweg massiv ausgeführt, wobei Wirbelstromeffekte in Kauf genommen werden, die das Nutz-Stör spannungs-Verhältnis ungünstig beeinflussen.constructional reasons can only be realized in a complex manner. The magnetically active parts are therefore made solid throughout, whereby eddy current effects are accepted, the useful disturbance affect the tension ratio unfavorably.
Nach der Erfindung ist der zentrale bewegliche Anker {Steuereisen) in einem ferromagnetischen Körper derart längsverschieblich, daß die Pole dieses Körpers und die ihn in Längsrichtung des Systems durchsetzenden Erreger- und Indikatorspulen eine magnetische Flußrichtung quer zur Systemachse erzwingen.According to the invention, the central movable armature is in a ferromagnetic body longitudinally displaceable in such a way that the poles of this body and those penetrating it in the longitudinal direction of the system Excitation and indicator coils force a direction of magnetic flux perpendicular to the system axis.
Anhand der beigefügten Figuren sollen das erfindungsgemäße Wirkungsprinzip und weitere Ausbildungen der Erfindung erläutert werden.The operating principle according to the invention should be based on the attached figures and further embodiments of the invention are explained.
Die Fig. 1 stellt, einen Längsschnitt, durch eine Anordnung nach der Erfindung mit je zwei Erreger- und Indikatorspulen dar. Die Fig. 2 zeigt eine Draufsicht auf die Anordnung nach Fig. 1.Fig. 1 represents, a longitudinal section, through an arrangement according to the Invention with two excitation and indicator coils each. FIG. 2 shows a plan view of the arrangement according to FIG.
Der induktive Geber besteht aus einem zylinderförmigen ferromagnetischen Körper 1 mit vier Längskanälen zur Aufnahme von zwei Erregerspulen 2, 3 und zwei Signal- oder Indikatorspulen 4, 5. Der Körper 1 weist an um 180 versetzten Stellen sektorartige Einschnitte auf, die sich je über die halbe Baulänge des Systems erstrecken. Dieser Aufbau ergibt sich bei einer zweckmäßigen Bauweise aus geschichteten Blechen gemäß Fig. 3 dadurch, daß die ausgesparten Segmente der Bleche um 180 nach der Schichtung der halben Paketlänge gedreht werden. Es entstehen'somit zwei durchgehende Kerne für die Erregerspulen 2 und (Erregerpole) und zwei sich nur über die halbe Baulänge des Systems erstreckende Kerne für die Signalspulen 4, 5 (Indikatorpole).The inductive encoder consists of a cylindrical ferromagnetic one Body 1 with four longitudinal channels to accommodate two excitation coils 2, 3 and two signal or indicator coils 4, 5. The body 1 has sector-like incisions at 180 offset points that each extend over half the overall length of the system. This structure results in an expedient construction of layered sheets according to FIG. 3 in that the recessed segments of the sheets around 180 after layering half the length of the package. There are thus two continuous cores for the excitation coils 2 and (Exciter poles) and two cores for the signal coils 4, 5 (indicator poles) that only extend over half the length of the system.
Als Bleche können Blechschnitte verwendet werden, wie sie in elektrischen Kleinstmaschinen üblich sind. Der verwendete weichmagnetische Werkstoff richtet sich nach dem Verwendungszweck. So kann z. B.Sheet metal cuts can be used as sheets, as they are in electrical Small machines are common. The soft magnetic material used depends on the intended use. So z. B.
-Z--Z-
Si-legiertes Blech (ζ, B. DYN. Bl. 4) bis etwa 400 Hz Erregerfrequenz verwendet werden. Für höhere Frequenzen bis etwa 10 000 Hz kommen Ni-legierte Bleche in Betracht.Si-alloyed sheet metal (ζ, B. DYN. Bl. 4) up to about 400 Hz excitation frequency be used. For higher frequencies up to around 10,000 Hz, Ni-alloyed sheets can be used.
Die beiden Erregerspulen 2, 3 sind derart geschaltet, daß sich an den beiden Stirnseiten des Systems zwei gleichnamige Pole ergeben (Ende Erregerspule 2 verbunden mit Anfang Erregerspule 3). Die Signalspulen 4, 5 sind einander entgegengeschaltet (Ende Signalspule 4 verbunden mit Ende Signalspule 5). ' -The two excitation coils 2, 3 are connected in such a way that there are two poles of the same name on the two end faces of the system (end of excitation coil 2 connected to start of excitation coil 3). The signal coils 4, 5 are connected in opposition to one another (end of signal coil 4 connected to end of signal coil 5). '-
Der von den Erregerpolen erzeugte Fluß verteilt sich bei Neutralstellung des Steuereisens 6, d. h. wenn das Steuereisen 6 die Indikatorpole zu gleichen Teilen überdeckt, gleichmäßig über diese Pole. In diesem Fall ist daher, weil die in den Signalspulen induzierten Spannungen gleicher Amplitude entsprechend der Spulenschaltung gegenphasig auftreten, die Summe der Spannungen bis auf eine kleine Restspannung höherer Frequenz gleich Null. Wird das Steuereisen 6 aus seiner Mitte heraus-, z. B. nach links bewegt, so nimmt der magnetische Widerstand der Luftstre.cke Steuereisen - linker Indikatorpol ab und der Widerstand der Luftstrecke Steuereisen * rechter Indikatorpol zu* Da die Flußverteilung dem Verhältnis der entsprechenden magnetischen Widerstände umgekehrt proportional ist, wird dann am Ausgang des Meßsystems eine Spannung auftreten, deren Amplitude in einem streng linearen Zusammenhang zur Auslenkung des Steuereisens 6 steht. Beim Übergang von positiver zu negativer Auslenkung des Steuereisens entsteht im Nullpunkt der Aus- ' lenkung ein Phasensprung der Aus gangs spannung von 180 .The flux generated by the exciter poles is distributed in the neutral position the control iron 6, d. H. when the control iron 6 covers the indicator poles in equal parts, evenly over these poles. In this case is therefore because the voltages induced in the signal coils are the same Amplitude occur out of phase according to the coil circuit, the sum of the voltages except for a small residual voltage of higher frequency is zero. If the control iron 6 is out of its center, z. B. moved to the left, so the magnetic resistance of the Luftstre.cke control iron - left indicator pole decreases and the resistance of the Clearance of control iron * right indicator pole to * As the flow distribution is inversely proportional to the ratio of the corresponding magnetic resistances, a voltage is then produced at the output of the measuring system occur, the amplitude of which is in a strictly linear relationship to the deflection of the control iron 6. When transitioning from positive to negative deflection of the control iron occurs at the zero point of the deflection ' Steering a phase jump of the output voltage from 180.
Die Erfindung kann auch mit nur je einer Erreger- und Signalspule oder mit mehr als je zwei dieser Spulen verwirklicht werden.The invention can also be implemented with only one excitation and signal coil or with more than two of these coils.
Der maximale Betrag der Auslenkung entspricht bei der vorgeschlagenen Anordnung der Pollänge. Bei kleineren Meßlängen, z. B. für die Messung kleiner Schwingungsamplituden, kann die Leistung des Aus gangs signalsThe maximum amount of deflection corresponds to the one proposed Arrangement of the pole length. For smaller measuring lengths, e.g. B. for measurement small oscillation amplitudes, the performance of the output signal
bei gleichen Abmessungen des Signalgebers dadurch gesteigert werden, daß das Eisensystem aus mehreren E'inzelpolen zusammengesetzt wird. Da die Einzelsysteme magnetisch und elektrisch nicht getrennt werden müssen, braucht der Stator nur durch eine alternierende Schichtung entsprechend dei* Systemunterteilung aufgebaut zu werden, wie dies in der linken Bildhälfte der Schnittdarstellung nach Fig. 4 veranschaulicht ist. Die gleichnamigen Pole sämtlicher Einzelsysteme sind dabei von gemeinsamen Wicklungen umfaßt. Lediglich das Steuereisen muß seiner Länge nach entsprechend der Systemzahl . aufgeteilt oder mit Radialnuten versehen werden, wobei die Nuttiefe groß gegenüber der Luftspaltlänge sein muß. . . .can be increased with the same dimensions of the signal transmitter, that the iron system is composed of several individual poles. Since the individual systems do not have to be separated magnetically and electrically, the stator only needs to be stratified accordingly the * system subdivision to be built up, as shown in the the left half of the sectional view of FIG. 4 is illustrated. The poles of the same name of all individual systems are surrounded by common windings. Only the steering wheel has to be of its length according to the system number. divided or provided with radial grooves the depth of the groove being large compared to the length of the air gap got to. . . .
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEJ11779U DE1931341U (en) | 1963-07-06 | 1963-07-06 | INDUCTIVE LENGTH KNIFE. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEJ11779U DE1931341U (en) | 1963-07-06 | 1963-07-06 | INDUCTIVE LENGTH KNIFE. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1931341U true DE1931341U (en) | 1966-01-20 |
Family
ID=33346253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEJ11779U Expired DE1931341U (en) | 1963-07-06 | 1963-07-06 | INDUCTIVE LENGTH KNIFE. |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1931341U (en) |
-
1963
- 1963-07-06 DE DEJ11779U patent/DE1931341U/en not_active Expired
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