DE837883C - Device for performing measurements using the carrier frequency method - Google Patents

Device for performing measurements using the carrier frequency method

Info

Publication number
DE837883C
DE837883C DED1917A DED0001917A DE837883C DE 837883 C DE837883 C DE 837883C DE D1917 A DED1917 A DE D1917A DE D0001917 A DED0001917 A DE D0001917A DE 837883 C DE837883 C DE 837883C
Authority
DE
Germany
Prior art keywords
carrier frequency
frequency method
coil
performing measurements
temperature coefficient
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
DED1917A
Other languages
German (de)
Inventor
Dipl-Ing Hans Steinbrenner
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.)
Daimler Benz AG
Original Assignee
Daimler Benz 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 Daimler Benz AG filed Critical Daimler Benz AG
Priority to DED1917A priority Critical patent/DE837883C/en
Application granted granted Critical
Publication of DE837883C publication Critical patent/DE837883C/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/16—Monitoring arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Testing Or Measuring Of Semiconductors Or The Like (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Description

Vorrichtung zum Durchführen von Messungen mittels des Trägerfrequenz-Verfahrens 13ci (Ici- Durclifiilirung des TrägerfreqLtetiz-Vcrfahrcns zu `Iclizwccken läl,')t sich z. B. aus Raumgründen eine symmetrische Doppeldrossel nicht immer vcrwetrdcn. Auch ist die Verwendung einer einfachen Drossel billiger. Bei der Verwendung der einfachen Drossel macht sich jedoch jede durch Tcinperaturändcriuigen hervorgerufene Änderung des Widerstandes und Änderung der Spulcnlänge im MclSz@@cig der Schaltung störend bemerkbar.Device for performing measurements using the carrier frequency method 13ci (Ici- implementation of the carrier frequency process for `` Iclizwccken '') t z. B. for reasons of space not always use a symmetrical double throttle. It is also cheaper to use a simple choke. When using the However, any one caused by temperature changes is a simple throttle Change of resistance and change of coil length in the MclSz @@ cig of the circuit noticeably disturbing.

Die Erfindung beseitigt diesen Cbelstand und besteht darin, daß der Ohmschc Widerstand im Mcf@zwcig der Schaltung durch eine wärmcLineiiipfindlichc Spule selbsttätig konstant gehalten wird, dcrcii Wicklung zum Teil aus einem Werkstoff mit einem negativen Temperaturkoeffizienten, z. 13- aus Konstantandraht, besteht, so daß nur die im Meßzweig auftretende induktive Änderung gemessen wird.The invention eliminates this Cbelstand and consists in that the ohmic resistance in Mcf @ zwcig the circuit is automatically kept constant by a heat-line sensitive coil, the winding partly made of a material with a negative temperature coefficient, z. 13- consists of constantan wire, so that only the inductive change occurring in the measuring branch is measured.

Von dem obengenannten Wicklungsabschnitt abgesehen, kann für die Wicklung der Spule das sonst übliche Drahtmaterial, z. B. Kupfer, verwendet werden.Apart from the above-mentioned winding section, for the winding the coil the otherwise usual wire material, z. B. copper, can be used.

1?m auch den Einfluß des Spulenkörpers bei verschiedenen Temperaturen auf die Abmessungen der Spule auszuschalten, ist in weiterer Ausgestaltung der Erfindung vorgesehen, daß der Werkstoff des Spulenkörpers einen möglichst kleinen Temperaturkoeffizienten besitzt. In Frage kommen dürfen keramische oder andere nicht metallische Stoffe. Der Erfindungsgegenstand ist für alle mit denn Trägerfrequenz-Verfahren durchführbaren Messungen von Vorteil, beispielsweise also auch bei Weg-, Dehnungs-, Beanspruchungs-, Drehmoment-,Druck-oder Schwingungsmessungen.1? M also the influence of the bobbin at different temperatures to switch off the dimensions of the coil is a further embodiment of the invention provided that the material of the coil body has a temperature coefficient that is as small as possible owns. Ceramic or other non-metallic substances may be considered. Of the The subject of the invention is feasible for everyone with the carrier frequency method Measurements are advantageous, for example, also for displacement, strain, stress, Torque, pressure or vibration measurements.

Claims (1)

PATENTANSPRÜCHE: i. Vorrichtung zum Durchführen von Messungen mittels des Trägerfrequenz-Verfahrens, dadurch gekennzeichnet, daß der Ohmsche Widerstand im Meßzweig der Schaltung durch eine wärmeunempfindliche Spule selbsttätig konstant gehalten wird, deren Wicklung zum Teil aus einem Werkstoff mit einem negativen Temperaturkoeffizienten, z. B. aus Konstantandraht, besteht, so daß nur eine in dem Meßzweig auftretende induktive Änderung gemessen wird. z. Meßvorrichtung nach Anspruch i, dadurch gekennzeichnet, da.ß der Spulenkörper aus einem keramischen oder anderem nicht metallischen Werkstoff mit einem möglichst kleinen Temperaturkoeffizienten besteht. PATENT CLAIMS: i. Device for carrying out measurements by means of the carrier frequency method, characterized in that the ohmic resistance in the measuring branch of the circuit is automatically kept constant by a heat-insensitive coil, the winding of which is partly made of a material with a negative temperature coefficient, e.g. B. of constantan wire, so that only one inductive change occurring in the measuring branch is measured. z. Measuring device according to claim i, characterized in that the coil body consists of a ceramic or other non-metallic material with the lowest possible temperature coefficient.
DED1917A 1950-03-29 1950-03-29 Device for performing measurements using the carrier frequency method Expired DE837883C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DED1917A DE837883C (en) 1950-03-29 1950-03-29 Device for performing measurements using the carrier frequency method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED1917A DE837883C (en) 1950-03-29 1950-03-29 Device for performing measurements using the carrier frequency method

Publications (1)

Publication Number Publication Date
DE837883C true DE837883C (en) 1952-05-02

Family

ID=7029593

Family Applications (1)

Application Number Title Priority Date Filing Date
DED1917A Expired DE837883C (en) 1950-03-29 1950-03-29 Device for performing measurements using the carrier frequency method

Country Status (1)

Country Link
DE (1) DE837883C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1178612B (en) * 1957-02-25 1964-09-24 Armco Steel Corp Method and device for measuring the deviation of the flatness of a body from a given value

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1178612B (en) * 1957-02-25 1964-09-24 Armco Steel Corp Method and device for measuring the deviation of the flatness of a body from a given value

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