Communications: electrical – Continuously variable indicating – Via radiant energy beam
Patent
1979-05-23
1980-12-30
Robinson, Thomas A.
Communications: electrical
Continuously variable indicating
Via radiant energy beam
G08C 1916, G08C 1506
Patent
active
042426669
ABSTRACT:
A multichannel data acquisition system for physical measurements on rotating members of operating machinery avoids slip rings and radio telemetry for data transfer by providing a capacitive coupling link between rotating and stationary members. Electronic circuitry mounted on the rotating member provides a pulse-code modulated signal containing the measured information for transmission through the capacitive coupling link. Power required to operate the rotating circuitry is inductively coupled from a stationary high-frequency source. The rotating circuitry includes a digital counter whose count is incremented by a momentary power interruption and whose digital output corresponds to a particular measuring range, allowing a range selection to be made during machinery operation.
REFERENCES:
patent: 3582921 (1971-06-01), Krieger
patent: 3750155 (1973-07-01), Oman
patent: 4011551 (1977-03-01), Adler
patent: 4057783 (1977-11-01), Blanchier
"Telemetry for Turbomachinery", Adler, Mechanical Engineering, Mar. 1979.
"Radio Telemetry for Strain Measurement in Turbines", Donato and Davis, Sound and Vibration, Apr. 1973.
Hunt Gerald P.
Reschovsky John M.
Ahern John F.
Austin Ormand R.
General Electric Company
Robinson Thomas A.
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