A Faster Telemeter for Carrier-Current Channels
- 1 January 1948
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in Transactions of the American Institute of Electrical Engineers
- Vol. 67 (1) , 288-294
- https://doi.org/10.1109/T-AIEE.1948.5059672
Abstract
This new frequency-type telemetering system combines continuous measurement and fast response with high accuracy and stability of calibration. It uses as a translating means an alternating electric signal whose frequency is directly proportional to the measured quantity. This signal originating in a contactless transmitter can be used to modulate or key carrier-current channels of conventional fixed frequency types. It is the frequency of this signal rather than its magnitude which is detected by the receiver and converted without moving parts into a proportional direct current sufficient to operate a conventional indicating or recording instrument. This system in its basic form was developed to telemeter a-c watts, vars, volts, and amperes. Auxiliary equipment is available to permit telemetering practically any other electrical or nonelectrical quantity.Keywords
This publication has 4 references indexed in Scilit:
- New Devices Derived From a Torque Balance TelemeterTransactions of the American Institute of Electrical Engineers, 1948
- Modulation in CommunicationTransactions of the American Institute of Electrical Engineers, 1947
- Functional Analysis of MeasurementsTransactions of the American Institute of Electrical Engineers, 1946
- TelemeteringTransactions of the American Institute of Electrical Engineers, 1929