Combined power and control signal transmission system

Details Combined power and control signal transmission system Combined power and control signal transmission system

1984-12-21

1987-01-27

Olms, Douglas W.

Communications: electrical

Systems

Selsyn type

340310A, H04M 1104

Patent

active

046397140

ABSTRACT:
At a first location (A), a signal combiner (14) combines DC power from a DC power source (10) and command communication signals from a command encoder (12). An electrical cable (B) conveys the combined DC electrical power and command communication signals to a remote location (C). The command communication signals are read by a signal separator (32) and used to control a DC to AC converter (34) such that the DC to AC converter converts the DC power to a high frequency signal which is modulated in accordance with the command communication. The high frequency signal is transmitted across an inductive coupler (40) to the remote equipment. A command unit (50) separates the command communication signals from the high frequency signal to control switches (54) and the functioning of components (56) at the remote location. A rectifier (52) provides DC power to operate the controlled components. A pressure transducer (62) generates data communication signals which are transmitted uplink across the inductive coupler. The uplink data communication signals are read from the cable by a data signal separator (92) and converted by a decoder (94) to the appropriate electrical format for a man-readable display (96).

REFERENCES:
patent: 3061734 (1962-10-01), Broome
patent: 3374459 (1968-03-01), Rabson et al.
patent: 3717858 (1973-02-01), Hadden
patent: 3742473 (1973-06-01), Hadden
patent: 3786423 (1974-01-01), Martell
patent: 3795817 (1974-03-01), Chambaut
patent: 4118977 (1978-10-01), Olsen et al.
patent: 4130861 (1978-12-01), Laforest
patent: 4173754 (1979-11-01), Feiker
patent: 4296450 (1981-10-01), Paice et al.
patent: 4442515 (1984-04-01), Meitzler

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