Portable conflict monitor testing apparatus

Details Portable conflict monitor testing apparatus Portable conflict monitor testing apparatus

1983-12-29

1986-04-29

Caldwell, Sr., John W.

Communications: electrical

Traffic control indicator

Traffic control or local controller failure indicator

340 22, 340515, 340907, 371 16, G08G 1097

Patent

active

045860416

ABSTRACT:
Portable apparatus for checking, in place, a conflict monitor which includes a test signal generator that produces a test signal that is applied to a programmable switch array to develop AC voltages, simulating a malfunctioning traffic signal controller. The apparatus includes timing circuitry that is operable in response to the test signal to determine the time taken by the conflict monitor under check to respond to application of a simulated traffic signal controller malfunction.

REFERENCES:
patent: 3902156 (1975-08-01), Hill
patent: 3978477 (1976-08-01), Schmitz
patent: 4156132 (1979-05-01), Hazzard
patent: 4200224 (1980-04-01), Flint
patent: 4293841 (1981-10-01), Potter
patent: 4308616 (1981-12-01), Timoc
patent: 4386427 (1983-05-01), Hosaka

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