DE892630C - Moving coil measuring device for a large deflection - Google Patents

Moving coil measuring device for a large deflection

Info

Publication number
DE892630C
DE892630C DED5781D DED0005781D DE892630C DE 892630 C DE892630 C DE 892630C DE D5781 D DED5781 D DE D5781D DE D0005781 D DED0005781 D DE D0005781D DE 892630 C DE892630 C DE 892630C
Authority
DE
Germany
Prior art keywords
moving coil
magnet
measuring device
coil measuring
large deflection
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
Application number
DED5781D
Other languages
German (de)
Inventor
Wilhelm Dr-Ing Fischer
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.)
Deutsche Versuchsanstalt fuer Luftfahrt eV
Original Assignee
Deutsche Versuchsanstalt fuer Luftfahrt eV
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 Deutsche Versuchsanstalt fuer Luftfahrt eV filed Critical Deutsche Versuchsanstalt fuer Luftfahrt eV
Priority to DED5781D priority Critical patent/DE892630C/en
Application granted granted Critical
Publication of DE892630C publication Critical patent/DE892630C/en
Expired legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING 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
    • G01D5/00Mechanical 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
    • G01D5/12Mechanical 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
    • G01D5/14Mechanical 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
    • G01D5/20Mechanical 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
    • G01D5/2006Mechanical 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
    • G01D5/2013Mechanical 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnets (AREA)

Description

Bei Drehspulmeßgeräten, die im Flugzeugbordbetrieb verwendet werden, wird sehr oft ein möglichst großer Ausschlag verlangt, um dem Flugzeugführer aus größerer Entfernung eine möglichst genaue Ablesung der angezeigten Werte zu ermöglichen. Dia :diese Geräte im allgemeinen sehr eng mit anderen Bordgeräten zusammengebaut sind, so tritt infolge der meistens nicht ganz zu verhindernden Streuung des Dauermagneten des" Gerätes eine Beeinflussung des Kornpasses auf. ZurVerhinderung dieser Kompaßbeeinflussung werden deshalb die Drehspulgeräte im allgemeinen mit zwei Abschirmkapseln versehen. Die Erweiterung des Meßbereichs beii Drehspulgeräten von 9o auf 27a° bringt physikalisch eine Verschlechterung des Gerätes mit sich, so daß man zur möglichsten Erfüllung der Forderungen und Angleichung an die Werte der 9o°-Geräte das Magnetfeld so stark wie möglich macht, wodurch j edoch der Aufbau des Gerätes sehr schwer wird. Die große Magnetmaterialmenge, die dabei notwendig ist, bringt naturgemäß eine erhöhte Streuung mit sich, so daß auch hier eine sehr gut schließende Abschirmung wie bei go°-Geräten notwendig ist.For moving coil measuring devices that are used in aircraft operations, very often the largest possible deflection is required in order to prevent the pilot from looking to enable the most accurate reading possible of the displayed values at a greater distance. Dia: these devices are generally very closely combined with other on-board devices occurs as a result of the permanent magnet scattering, which can usually not be completely prevented of the "device on influencing the grain pass. To prevent this influencing of the compass Therefore the moving coil devices are generally provided with two shielding capsules. The extension of the measuring range for moving coil devices from 9o to 27a ° brings physical a deterioration of the device with it, so that one to the most possible fulfillment the requirements and adjustment to the values of the 9o ° devices made the magnetic field so strong Makes as possible, whereby however the construction of the device is very difficult. the large amount of magnetic material, which is necessary, naturally results in an increased Scattering with itself, so that here, too, a very well-closing shielding as with go ° devices is necessary.

Allgemein verursachen Magneten dann die geringste Streuung, wenn das Magnetmaterial möglichst nahe am Nutzluftspalt angeordnet ist.In general, magnets cause the least amount of scattering if that Magnet material is arranged as close as possible to the useful air gap.

Es ist nun weiter bekannt, den Magneten in radialer Richtung zu magnetisieren. Durch eine solche Magnetisierungsart kann man moderne Magnetstähle verwenden, bei denen die besten Energiewerte schon bei kurzen magnetischen Längen erreicht werden. Eine solche Anordnung ermöglicht es aber immer noch- nicht, das Drehspulgerät nach außen vollständig abzuschirmen.It is now also known to magnetize the magnet in the radial direction. With this type of magnetization, modern magnetic steels can be used which the best energy values can be achieved with short magnetic lengths. However, such an arrangement still does not allow the moving coil device to be moved shield completely on the outside.

Mit Rückseicht darauf, daß der Querschnitt des Rückschlusses derartiger Magneten verhältnismäßig groß sein muß, andererseits aber die Bestrebung vorliegt, die Außendurchmesser der Drehspulgeräte zu normen, lagen Schwierigkeiten vor, brauchbare Anordnungen zu schaffen, die geringe Streuung aufweisen. Da man die Streuung bei den bisher bekannten Geräten reicht auf ein bestimmtes kleines Maß vermindern konnte, sah man eine besondere Kapselung der ganzen Magnetordnung vor.With a view to the fact that the cross-section of the conclusion is such Magnet must be relatively large, but on the other hand there is an effort There were difficulties in standardizing the outside diameter of the moving coil devices, useful ones To create arrangements that have little scatter. Since you have the scatter at the previously known devices could reduce the range to a certain small amount, a special encapsulation of the entire magnetic order was provided.

Der Gegenstand der Erfindung zeigt einen Weg zur Lösung der bestehenden Schwierigkeiten und offenbart ein Gerät, das sich gegenüber den bisherigen Geräten durch eine weitere Verminderung der Streuung auszeichnet. Sollte aus irgendeinem Grunde diese Streuungsverminderung nicht ausreichen, so kann man, wie bekannt, an den Stirnseiten der Magnetanordnung Stirnbleche vorsehen. Dias Wesen der Erfindung besteht darin, d-aß der als Mragnetrückschluß dienende Weicheisenring des im wesentlichen radial magnetisierten, ringförmigen Drehspulmaagneten axial über die Ausdehnung dies Magneten so weit hinausgezogen ist, daß die Streuung des Magneten; nach außen praktisch unterdrückt wird.The object of the invention shows a way of solving the existing ones Difficulties and reveals a device that differs from previous devices characterized by a further reduction in the spread. Should be some Basically, this reduction in dispersion is not sufficient, so one can, as is known, at Provide end plates for the end faces of the magnet assembly. The essence of the invention consists in d-aß the soft iron ring of the essentially serving as a magnetic inference radially magnetized, ring-shaped moving coil magnets axially across the extension this magnet is drawn out so far that the scattering of the magnet; outward is practically suppressed.

Ausführungsbeispiele des Erfindungsgegenstands zeigen die Abb. i bis 3.Exemplary embodiments of the subject matter of the invention are shown in FIGS 3.

Abb. i zeigt eine Draufsicht auf ein erfinidungsgemäß ausgebildetes D!rehspulgerät, Abb. z einen Schnitt durch die Anordnung nach Abb.. i in Richtung A-B und Abb. 3 einen Schnitt durch ein Drehspulgerät zur Veranschaulichung des sich ausbildenden Magnetfeldes.Fig. I shows a plan view of an inventive design Rotary coil device, Fig. Z a section through the arrangement according to Fig. I in the direction A-B and Fig. 3 a section through a moving coil device to illustrate the itself forming magnetic field.

Der ringförmige Magnet i umschließt den aus Weicheisen bestehenden Kern 2, um den sich die Spule 3 in ihrem Ausschlagsbereich drehen kann. Dieser ringförmige Magnet i ist, wie bekannt, iii radialer Richtung, wie in Abb. i angedeutet, magnetisiert, so daß sich der Fluß nach Austritt aus dem Magneten über den Luftspalt, den Kern 2, das Rückführungsstück 4 und den äußeren Rückführungsmantel schließt. Dieser Rückführungsmantel 5 ist nun, wie es die Abb. 2 und 3 veranschaulichen, so weit über den Magneten in axialer Richtung überstehenid ausgebildet, daß die mach außen wirkende Streuung des Magneten sehr gering wird, wie es die Abb.-3 schematisch andeutet.The ring-shaped magnet i encloses the one made of soft iron Core 2 around which the coil 3 can rotate in its deflection range. This ring-shaped As is known, magnet i is magnetized in the radial direction, as indicated in Fig. so that the flux after exiting the magnet is via the air gap, the core 2, the return piece 4 and the outer return jacket closes. This regression coat 5 is now, as Figs. 2 and 3 illustrate, so far beyond the magnet in axial direction is formed that the outside scattering of the magnet becomes very small, as schematically indicated in Fig. 3.

Läßt sich aus irgendwelchem Grunde der axiale überstand über dien Magneten zur praktischen Aufhebung,der Streuung nicht so. groß machen, daß die Streuung praktisch verhindert ist, oder wird auch bei genügendem überstand geringste Streuung verlangt, so läßt sich die Streuung durch Stirnscheiben am Ende des äußeren Rückführungsringes 5 noch weiter herabdrücken. Im allgemeinen wird man die Skalenscheibe als Schlußschei.be verwenden, während man die untere Scheibe als nutzflußführenden Querschnitt ausbilden, wird, so daß man mit einem dünneren Eisenmantel 5 auskommen kann.Can the axial protrusion over you for any reason Magnets for practical suspension, but not scattering. make that great spread is practically prevented, or even if there is enough protrusion, the slightest spread required, the scattering can be caused by end disks at the end of the outer return ring 5 press down even further. In general, the dial is used as the final disc use, while the lower disk is designed as a cross section that guides the useful flow, so that you can get by with a thinner iron jacket 5.

Claims (2)

PATENTANSPRÜCHE: i. Drehspulmeßgerät für großen Ausschlag bis etwa 30o'°, dessen ringförmiger, magnetischer Werkstoff im wesentlichen radHal magnetisiert ist und der zur Rückführung des Flusses einen Weicheisenring verwendet, dadurch gekennzeichnet, daß der Weicheisenring axial über die Ausdehnung des Magneten so, weit herausgezogen äst, d-aß die Streuung des Magneten nach außen praktisch unterdrückt ist. PATENT CLAIMS: i. Moving coil measuring device for a large deflection up to approx 30o '°, whose ring-shaped, magnetic material is essentially magnetized radHal and who uses a soft iron ring to return the river, thereby characterized that the soft iron ring axially over the expansion of the magnet so, Aest pulled far out, d-ate practically suppressed the outward scattering of the magnet is. 2. Drehspulmeßgerät nach Anspruch i, dadurch gekennzeichnet, daß zur vollständigen Unterdrückung Stirnscheiben in an sich bekannter Weise- angeordnet sind.2. moving coil measuring device according to claim i, characterized in that the complete Suppression end disks are arranged in a manner known per se.
DED5781D 1940-04-12 1940-04-12 Moving coil measuring device for a large deflection Expired DE892630C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DED5781D DE892630C (en) 1940-04-12 1940-04-12 Moving coil measuring device for a large deflection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED5781D DE892630C (en) 1940-04-12 1940-04-12 Moving coil measuring device for a large deflection

Publications (1)

Publication Number Publication Date
DE892630C true DE892630C (en) 1953-10-08

Family

ID=7031564

Family Applications (1)

Application Number Title Priority Date Filing Date
DED5781D Expired DE892630C (en) 1940-04-12 1940-04-12 Moving coil measuring device for a large deflection

Country Status (1)

Country Link
DE (1) DE892630C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1068361B (en) * 1959-11-05

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1068361B (en) * 1959-11-05

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