System controlling apparatus which compares signals from sensors

Details System controlling apparatus which compares signals from sensors System controlling apparatus which compares signals from sensors

1978-12-12

1981-08-11

Miller, J. D.

Railway switches and signals

Electric automatic highway signals, mine doors, and gates

Normally open track circuit

235 92TC, 246247, 246249, 324179, B61L 1108

Patent

active

042830311

ABSTRACT:
A system controlling apparatus wherein an array of sensors are used for detecting information and for providing signals indicative of information concerning passing articles such as presence of an article at a sensor, number of articles passing, the direction of passing and the velocity of passing. Signal processing apparatus is comparing the signals with pre-determined parameter information as to the system and for providing control to the system in response to detecting equality and for providing overriding control to the system in response to detecting inequality. Each of the sensors is self-checking during the period an article is not present. The information detected by the sensors is converted to a simple binary high or low signal and such binary signals from all sensors are compared in a "look-up" table comparator arranged to recognize a particular pattern of highs and lows at its input and to provide an output to the system if it is in accordance with a pre-determined pattern corresponding to the pre-determined parameter information of the system.

REFERENCES:
patent: 3144225 (1964-08-01), Suerkemper et al.
patent: 3610920 (1971-10-01), Frielinghaus
patent: 3721859 (1973-03-01), Blanyer
patent: 3731087 (1973-05-01), King
patent: 3777139 (1973-12-01), Peel
patent: 3781542 (1973-12-01), Brockman
patent: 4052595 (1977-10-01), Erdmann et al.
patent: 4070560 (1978-01-01), Blanyer

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