Method of transmitting measuring values in a monitoring system

Details Method of transmitting measuring values in a monitoring system Method of transmitting measuring values in a monitoring system

1983-04-19

1986-09-16

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

With particular system function

340508, 340511, 340518, 34082554, G08B 2600

Patent

active

046125345

ABSTRACT:
Measuring stations or locations are connected in cascade to signal lines and transmit measured or measuring values to a central signal station at which the measured values are linked or appropriately processed so as to obtain distinct malfunction or alarm signals. Upon activation of the monitoring system all measuring stations are disconnected by a change in voltage appearing on the signal line. Then, the measuring stations are reconnected to the signal line in a timewise staggered fashion by means of switching elements present at each measuring station in such a manner that each measuring station additionally reconnects a subsequent measuring station to the line voltage after a predetermined time-delay. Address storages are present at the measuring stations and are charged or occupied in a predetermined sequence by the central signal station with addresses associated with the individual measuring stations. The address storages are thereafter locked prior to the time that the next following measuring station at the same signal line is connected to the signal voltage by the switching element.

REFERENCES:
patent: 4263580 (1981-04-01), Sato
patent: 4290055 (1981-09-01), Furney et al.
patent: 4400694 (1983-08-01), Wong et al.
patent: 4404548 (1983-09-01), Muller et al.
patent: 4413259 (1983-11-01), Lutz et al.
patent: 4468664 (1984-08-01), Galvin et al.
Technische Mitteilung--AEG-Telefunken, vol. 61, No. 6, 1971.

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