APPARATUS AND METHOD FOR PREVENTING DATA CONTACT BETWEEN CONTACTLESS IC CARD READER AND CONTACTLESS IC CARDS

摘要

The invention non-contact IC card reader and preventing data collisions between a large number of cards to be to an apparatus and method, the non-contact IC card reader includes a number of predetermined of the non-contact type IC card desired to be non-contact type IC cards are close to the detection signal to be close to each detected sensor circuit for sensing a non-contact type IC card and the number; Pass (pass) the detected signal to the number detected by the sensor and circuit, and a power control circuit that controls to control the power switch for generating the high-frequency power source; By a switch control of the power control circuit generates the power to the high frequency, a power supply for providing an electromagnetic wave including a desired signal passes through the power control circuit; Controlling the electromagnetic wave matched to the electromagnetic waves supplied from the power supply may occur via an antenna and, when a predetermined non-contact IC card close-up, providing the power of the generated high-frequency matching circuit and; Predetermined and then activated according to the detection signal to the number of the IC card, to provide an electromagnetic wave including a request signal, determines whether a response to the request signal provided from a predetermined non-contact IC card request signal provided from the power supply control circuit while the response in the case of data collision occurs, it includes internal circuitry to perform a collision avoidance procedures,; When a plurality of contactless IC cards are the electromagnetic waves generated from the antenna of the contactless IC card reader, the organic binder to the plurality of non-contact type IC card in the antenna provided with the organic power (power), a rectifier circuit for generating induced power provided by the induced voltage and and an internal circuit for activating a predetermined non-contact IC card by the induced voltage supplied from the rectifier circuit. Thus, it provides an efficient power consumption and stable power supply card readers, according to the number of contactless IC card, proximity carrying out anti-collision process to occur when there are multiple sensing know the card number detected before performing collision avoidance procedures Once you have checked the ID cards of the same card and number, to prevent further conflict procedures are capable of communicating with all the cards in the proximity does not make the effect more quickly.