DE331809C - Device for eliminating temperature errors in eddy current velocity meters - Google Patents

Device for eliminating temperature errors in eddy current velocity meters

Info

Publication number
DE331809C
DE331809C DENDAT331809D DE331809DD DE331809C DE 331809 C DE331809 C DE 331809C DE NDAT331809 D DENDAT331809 D DE NDAT331809D DE 331809D D DE331809D D DE 331809DD DE 331809 C DE331809 C DE 331809C
Authority
DE
Germany
Prior art keywords
eddy current
temperature errors
current velocity
eliminating temperature
velocity meters
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
DENDAT331809D
Other languages
German (de)
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.)
Individual
Original Assignee
Individual
Publication date
Application granted granted Critical
Publication of DE331809C publication Critical patent/DE331809C/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/49—Devices characterised by the use of electric or magnetic means for measuring angular speed using eddy currents
    • G01P3/495—Devices characterised by the use of electric or magnetic means for measuring angular speed using eddy currents where the indicating means responds to forces produced by the eddy currents and the generating magnetic field
    • G01P3/4956—Devices characterised by the use of electric or magnetic means for measuring angular speed using eddy currents where the indicating means responds to forces produced by the eddy currents and the generating magnetic field with thermal compensation

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Description

Vorrichtung zur Beseitigung der Temperaturfehler bei Wirbelstrom-- geschwindigkeitsmessern. Die Erfindung betrifft eine Vorrichtung zur Beseitigung der Temperaturfehler bei Wirbelstromgeschwindigkeitsmessern mit rotierenden Magneten. Es ist schon bekannt, zur Beseitigung der Temperaturfehler einen innen gelegenen offenen Eisenschlußring zu benutzen und das Verändern des Luftspaltes durch einen Körper mit großem Temperaturkoeffizienten zu bewirken. Gemäß der vorliegenden Erfindung ist der innen gelegene Eisensuhluß federnd und um einen aus einem vcllen Stück bestehenden Träger aus einem '-Material mit hohem Ausdehnungskoeffizienten herumgelegt.Device for eliminating temperature errors in eddy currents speedometers. The invention relates to a device for disposal the temperature error in eddy current velocimeters with rotating magnets. It is already known to use an internal one to eliminate temperature errors to use an open iron locking ring and to change the air gap by means of a To effect bodies with large temperature coefficients. According to the present invention the inner iron base is resilient and consists of a whole piece Carrier made of a 'material with a high coefficient of expansion laid around.

Die Erfindung ist auf _der Zeichnung in zwei Figuren dargestellt, und zwar ist Fig. 1 eine Ansicht, Fig.2 ein Querschnitt.The invention is shown on the drawing in two figures, namely Fig. 1 is a view, Fig. 2 is a cross section.

Es sind a der von der Zeigerachse getragene Anker, w die Antriebswelle, n die Magnetgrundplatte, m. die reit der 'Magnetgrundplatte und der Welle verbundenen rotierenden Magneten. Die Beseitigung der Temperaturfehler wird dadurch erzielt, daß der offene Eisenring i im .Innern fest auf einen Zyliii-,ler w von einem Material von großem Aus-;lehnungskoeffizienten (Hartgummi usw.) stramm (federnd) aufsitzt. Bei Temperaturerhöhung dehnt sich das Material aus, und der Luftspalt ic wird verengt; bei Temperaturerniedrigung zieht sich das Material zusaininen, der federnde Ring zieht sich mit zusammen, der Luftspalt wird vergrößert und das Feld geschwächt.They are a the armature carried by the pointer axis, w the drive shaft, n the magnetic base plate, m. the reit of the 'magnetic base plate and the shaft connected rotating magnet. The elimination of temperature errors is achieved by that the open iron ring i inside firmly on a cylinder, ler w of a material with a large expansion coefficient (hard rubber, etc.) sits tightly (resiliently). When the temperature rises, the material expands and the air gap ic is narrowed; When the temperature drops, the material pulls together, the resilient ring contracts with it, the air gap is enlarged and the field is weakened.

Claims (1)

hATENT-ANSl'RUC11: Vorrichtung zur Beseitigung der Temperaturfehler bei Wirbelstromgeschwindigkeitsmessern mit rotierenden Magneten und geschlitztem Eisenschlußring des -Magneten, dadurch gekennzeichnet, daß der innen gelegene offene Eisenschlufi federnd ist und um einen aus einem vollen Stück bestehenden Träger aus einem Material mit hohem !@usdelnittngskoeffizienten herumgelegt ist. ,HATENT-ANSl'RUC11: device for eliminating temperature errors for eddy current speedometers with rotating magnets and slotted Iron closing ring of the magnet, characterized in that the open inside Eisenschlufi is resilient and around a one-piece support made of a material with a high! @usdelnittng coefficient is lying around. ,
DENDAT331809D Device for eliminating temperature errors in eddy current velocity meters Expired DE331809C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE331809T

Publications (1)

Publication Number Publication Date
DE331809C true DE331809C (en) 1921-01-12

Family

ID=6199301

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT331809D Expired DE331809C (en) Device for eliminating temperature errors in eddy current velocity meters

Country Status (1)

Country Link
DE (1) DE331809C (en)

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