Conflict monitor

Details Conflict monitor Conflict monitor

1985-05-14

1988-03-29

Chin, Gary

Boots, shoes, and leggings

340931, 340642, B60Q 900, G06F 1548

Patent

active

047348623

ABSTRACT:
An apparatus and method are disclosed which find particular utility as a component of a traffic control system known as a conflict monitor. The apparatus includes a number of solid state switches which are activated to scan inputs from traffic control signals. The inputs are sequentially applied to a A-D converter which samples the voltage and applies it to a microprocessor which is programmed to determine the voltage and analyze the signals for conflicts, or other errors. The input lines are also connected to terminals of a program board whereby the microprocessor can instruct a switch to ground the common pin on the program board to allow program board inputs to be applied to the microprocessor for indicating permissible conflicts. A method includes a technique for determining the voltage of an input analog signal by scanning a plurality of input signals and sampling them in accordance with a relationship which provides minimum error. A display may be operated in one of two modes. In the first mode, a display indicates the signals involved in a conflict, or other error determination. In a second mode, the display may be sequentially stepped through each signal to determine its particular state at the time of a conflict.

REFERENCES:
patent: 3328791 (1967-06-01), Casciato
patent: 3902156 (1975-08-01), Hill
patent: 3922643 (1975-11-01), Poole
patent: 4077061 (1978-02-01), Johnston et al.
patent: 4135145 (1979-01-01), Eberle
patent: 4276605 (1981-06-01), Okamoto et al.
patent: 4383240 (1983-05-01), Staats, Jr.
patent: 4586041 (1986-04-01), Carlson
"Conflict Monitors", 1983, NEMA Standard, 5-15-1978, Section 6, pp. 45-56.

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