Communications: electrical – Continuously variable indicating – With meter reading
Patent
1985-02-20
1986-09-30
Myracle, Jerry W.
Communications: electrical
Continuously variable indicating
With meter reading
340505, 455105, G08C 1700
Patent
active
046149457
ABSTRACT:
An automatic/remote instrument monitoring system and method are disclosed. RF transponder units are operatively connected to and monitor one or more parameters of a remotely located instrument. The transponders include RF receivers that sample received RF signals at a low duty cycle and look for a common wake-up signal transmitted from a mobile data collection unit. All transponders receiving the common wake-up signal simultaneously energize their respective transmitters and transmit their respective messages over a predetermined RF transmission bandwidth to receivers in the mobile unit. The time and frequency parameters of the transponder transmissions are varied in a manner such that the transmission signals of simultaneously transmitting transponders differ. A plurality of RF receivers in the mobile unit are respectively tuned to collectively receive the transponder transmissions, across the entire transmission bandwidth. Decoding and signal processing circuits in the mobile receiver unit identify transmitting transponders and process their respective messages.
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Brunius Robert E.
Nelson Jon R.
Diversified Energies, Inc.
Myracle Jerry W.
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