Detector system with multiple sensors each sensing different dan

Details Detector system with multiple sensors each sensing different dan Detector system with multiple sensors each sensing different dan

1986-11-21

1988-03-22

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

With particular system function

340505, 340512, 340513, 340518, 34082507, G08B 1900

Patent

active

047332247

ABSTRACT:
A detector system having multiple sensors, each sensor detecting a different danger condition, has an address comparator for determining whether an access address coincident with a selected address is present in an access signal received from a central monitoring unit. The detector exchanges an information signal with the central monitoring unit using the coincidence detection signal of the address comparator. Success coincidence detection signals, corresponding to successively selected addresses being present in the access signal, are counted by a counter. If the detector has two sensors, the counter may be a D flip-flop circuit, and if the detector has more than two sensors, the counter may be a ring counter. The counter generates a signal for operating respective analog switches connected to the outputs of each sensor so as to successively through-connect the output of one sensor to the output of the detector system for transmittal to the central monitoring unit.

REFERENCES:
patent: 4468664 (1984-08-01), Galvin et al.
patent: 4555695 (1985-11-01), Machida et al.
patent: 4581604 (1986-04-01), Kimura et al.
patent: 4613848 (1986-09-01), Watkins
patent: 4618853 (1986-10-01), Yuchi

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