| 摘要 |
A system controlling apparatus is disclosed wherein an array of sensors 1, 2, 3, 4, 5, 6 are used for detecting information and for providing signals as to the passing of articles 100, such as presence of article at sensor WPC, number of articles passing WCC, the direction of passing WDC and the velocity of passing V, and signal processing means 13, 14, 17, 18 are provided for comparing the signals with pre-determined parameter information as to the system and for providing control to control means 15 of the system based on the information detected at a first sensor as determined by the processing means 13, 14, 17, 18 and an overriding control if the information detected from an adjacent sensor is different. Each of the sensors 1, 2, 3, 4, 5, 6 disclosed is self-checking whilst an article 100 is not present. The information detected by the sensors 1, 2, 3, 4, 5, 6 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 13 arranged to recognize a particular pattern of highs and lows at its input and to provide an output to the control means 15 if it is in accordance with a pre-determined pattern corresponding to the pre-determined parameter information of the system.
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