Communications: electrical – Continuously variable indicating – With meter reading
Patent
1986-03-14
1989-01-17
Caldwell, John W.
Communications: electrical
Continuously variable indicating
With meter reading
34087028, 34082554, 455 88, G08C 1700
Patent
active
047990597
ABSTRACT:
An improved automatic/remote RF instrument monitoring system including a plurality of transponders configured to operate with one of a plurality of parameter sensing instruments remotely located from an interrogate/receiver. The interrogate/receiver transmits RF transponder activation signals in the form of a tone modulated onto a carrier. In response to the activation signals, the transponders "wake-up" and transmit an RF transponder signal which is received and processed by the interrogate/receiver. The transponders include a transmission enable circuit which initiates transmission of the RF transponder signals at random times after receipt of the activation signals. The RF transponder signals are formed by a plurality of spaced transponder information packets. Transponder information packets of the transponder signal are transmitted at pseudorandom frequencies as a Manchester encoded bit stream including a preamble field of predetermined preamble data, an instrument parameter field of data sensed by the instrument, an instrument identification field of instrument identification data, and an error control code field of BCH error control code data.
REFERENCES:
patent: 3531771 (1970-09-01), Jaxheimer et al.
patent: 3566384 (1971-02-01), Smith et al.
patent: 3609726 (1971-09-01), Stewart, Jr.
patent: 3656112 (1972-04-01), Paull
patent: 3705385 (1972-12-01), Batz
patent: 3737858 (1973-06-01), Turner et al.
patent: 3742142 (1973-06-01), Martin
patent: 3778771 (1973-12-01), Whitaker
patent: 3815119 (1974-06-01), Finlay, Jr.
patent: 3820073 (1974-06-01), Vercellotti et al.
patent: 3868640 (1975-02-01), Binnie et al.
patent: 3878512 (1975-04-01), Kobayashi et al.
patent: 3899774 (1975-08-01), Binnie et al.
patent: 3900842 (1975-08-01), Calabro et al.
patent: 3922492 (1975-11-01), Lumsden
patent: 3967202 (1976-06-01), Batz
patent: 4012734 (1977-03-01), Jagoda et al.
patent: 4013959 (1977-03-01), Patterson
patent: 4020477 (1977-04-01), Holland
patent: 4031513 (1977-06-01), Simciak
patent: 4040046 (1977-08-01), Long et al.
patent: 4104629 (1978-08-01), Isbister et al.
patent: 4151510 (1979-04-01), Howell et al.
patent: 4234874 (1980-11-01), Saya
patent: 4241237 (1980-12-01), Paraskevakos et al.
patent: 4312072 (1982-01-01), Vogel
patent: 4344171 (1982-08-01), Lin et al.
patent: 4352201 (1982-09-01), Miller
patent: 4387465 (1983-06-01), Becker
patent: 4446462 (1984-05-01), Ouellette et al.
patent: 4578598 (1986-03-01), Faulhaber
patent: 4614945 (1986-09-01), Brunius et al.
patent: 4653068 (1987-03-01), Kadin
"Error-Correction Coding for Digital Communications", Clark, Jr. et al., Jun. 1981, pp. 84-85 and 394-397.
Chapter 6 (pp. 141-181), of a book entitled, "Error Control Coding: Fundamentals and Application.", Lin et al., 1983.
Chapter 4, (pp. 85-111), of a book entitled "Error Control Coding: Fundamentals and Application.", Lin et al., 1983.
Denzene Quentin S.
Grindahl Mervin L.
Caldwell John W.
EnScan, Inc.
Holloway III Edwin C.
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