Communications: electrical – Continuously variable indicating – With particular transmitter
Patent
1984-12-21
1988-02-16
Caldwell, Sr., John W.
Communications: electrical
Continuously variable indicating
With particular transmitter
34087026, G08C 1906
Patent
active
047258390
ABSTRACT:
An exciter and detector circuit (A1, A2) is inductively coupled (18, 20) with a current conductor (B). The current conductor extends to a remote location at which it is inductively coupled (26, 30) with a remote transducer and encoder circuit (C1, C2). The exciter and decoder circuit supplies a square wave signal of a fixed frequency and amplitude across a primary winding (18) of the inductive coupler. After each half cycle of the square wave as the magnetic field in the inductive coupler is collapsing, a flyback voltage peak is generated which varies with the load applied to the current conductor. At the remote location, a voltage to frequency converter (40) converts variations in the output of the transducer into corresponding variations in a frequency signal. A load modulator (42) is connected with the voltage to frequency converter to apply a load to the rectifier at the frequency of the voltage to frequency converter. This causes the amplitude of the flyback voltage peaks to vary with an envelope frequency which is the same as the frequency of the voltage to frequency converter. A detector frequency to voltage converter (70) converts the envelope frequency into a voltage which varies in proportion to the envelope frequency, hence, to variations in the condition sensed by the transducer.
REFERENCES:
patent: 1991658 (1935-02-01), Clark et al.
patent: 2172918 (1939-09-01), Watts
patent: 2415364 (1947-02-01), Mounce
patent: 2547876 (1951-04-01), Krasnow
patent: 2615956 (1952-10-01), Broding
patent: 3495212 (1970-02-01), Brock
patent: 3668673 (1972-06-01), Adler
patent: 3713124 (1973-01-01), Durland
patent: 3717858 (1973-02-01), Hadden
patent: 3824857 (1974-07-01), Smith
patent: 4001798 (1977-01-01), Robinson
patent: 4015194 (1977-03-01), Epling
patent: 4225851 (1980-09-01), Reschovsky
patent: 4296413 (1981-10-01), Milkovic
patent: 4354190 (1982-10-01), Reschovsky
patent: 4403218 (1983-09-01), Beal
patent: 4404163 (1983-09-01), Bridges
patent: 4455555 (1984-06-01), Symonds et al.
Caldwell Sr. John W.
Ferranti Subsea Systems, Ltd.
Queen Tyrone
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