Communications: electrical – Continuously variable indicating – Via radiant energy beam
Patent
1992-12-18
1994-12-06
Peng, John K.
Communications: electrical
Continuously variable indicating
Via radiant energy beam
34087029, 34087030, 34082572, 359148, 359154, G08C 1936
Patent
active
053714962
ABSTRACT:
A two-part sensor includes a power source/signal receiver and a signal generator which are physically spaced and disconnected from one another. The power source/signal receiver is encased within transparent encapsulating material and includes an annular solenoid core with an aperture, a coil around the core and a photodiode mounted in the aperture. The photodiode detects a modulated light beam received from the signal generator and produces an output information signal. The solenoid coil produces a fluctuating magnetic field when connected to a power supply. The signal generator is encased within transparent encapsulating material and includes an annular relay coil with an aperture, a coil around the core, a transducer circuit and an LED mounted within the aperture. The relay coil provides a signal generator supply potential when positioned within the magnetic field produced by the power source/signal receiver. The supply potential powers the transducer circuit and the LED. The transducer circuit generates a modulated transducer signal as a function of a sensed parameter. The LED is coupled to the transducer circuit and produces the modulated light beam as a function of the transducer signal.
REFERENCES:
patent: 3522509 (1970-08-01), Hasenbalg
patent: 3961526 (1976-06-01), Himmelstein
patent: 4030058 (1977-06-01), Riffe et al.
patent: 4236086 (1980-11-01), Hoebel
patent: 4491981 (1985-01-01), Weller et al.
patent: 4531193 (1985-07-01), Yasuhara et al.
patent: 4887465 (1989-12-01), Bryne et al.
NASA Tech Briefs, Sep. 1988, pp. 22, 24, John C. Moody et al., "Contactless Coupling for Power and Data".
Bauer William D.
Griswold Gary L.
Hill Andrew
Kirn Walter N.
Minnesota Mining and Manufacturing Company
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