（Access control system is mainly composed of management system, controller, read card host three layers. Management system is responsible for personnel management, authorization, data collection, statistics, analysis and so on. The cardholder card fast induction zone a sloshing absorber in reading, the reader can perceive a card and the card information (card number) sent to the host, the host check card legitimacy, and then decide whether to open action, for each channel intersection object and pass time for management.）