DE837883C - Device for performing measurements using the carrier frequency method - Google Patents
Device for performing measurements using the carrier frequency methodInfo
- 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
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)
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)
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 |
-
1950
- 1950-03-29 DE DED1917A patent/DE837883C/en not_active Expired
Cited By (1)
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 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE2314954C3 (en) | Arrangement for the ongoing determination and monitoring of the service life of thermally loaded thick-walled components | |
DE837883C (en) | Device for performing measurements using the carrier frequency method | |
DE1423978A1 (en) | Integrator | |
DE3118306C2 (en) | ||
DE1448968B1 (en) | Transmitter with a circuit of strain-sensitive resistors arranged on an expansion body | |
DE2432032A1 (en) | Inductive double-coil measurement transducer - is non-contacting and performs continuous measurement of angular position using eccentric disc | |
DE875879C (en) | Shielding method for strain gauges | |
DE442294C (en) | Device for the determination of heat transmission and heat conductivity values, consisting of a subdivided measuring plate provided with an insulating layer | |
DE19546164A1 (en) | Low cost thermometer useful as normal temp., e.g. as fever thermometer | |
DE685151C (en) | Method and device for measuring the permeability of telecommunication cores that are evenly subjected to inductive loads | |
DE1490498B2 (en) | HOT CONDUCTOR FROM A DOPED A DEEP III B DEEP V CONNECTION | |
DE880507C (en) | Differential pressure meter | |
DE465367C (en) | Electric gas mixture tester | |
DE690694C (en) | hen quotient meters | |
DE927752C (en) | Electric Isolation | |
DE746197C (en) | Sheet metal brush holder for electrical machines | |
DE2514907A1 (en) | COIL FOR ELECTRICAL MEASUREMENTS | |
DE834019C (en) | Device for measuring the internal temperature of a capacitor | |
DE746228C (en) | Device for measuring changes in length or rotation on statically or dynamically loaded components | |
AT235400B (en) | Rectifier device | |
DE646113C (en) | By means of a sliding contact or the like, adjustable control resistor, which consists of conductor and semiconductor resistors | |
DE1777892U (en) | DEVICE FOR THE PRODUCTION OF END CLOSURES FOR HIGH VOLTAGE CABLES OD. DGL. MADE FROM CASTABLE MATERIALS WITH POTENTIAL CONTROLLING INSERTS AND THE END CAP. | |
AT201896B (en) | Electromagnetic force meter | |
DE893685C (en) | Electrical sheet resistance and process for its manufacture | |
DE936406C (en) | Heating element with a very small diameter for an indirectly heated glow cathode |