Multi-functional pass card of expressway and application method in route recognition system
A technology of expressway and application method, applied in the direction of induction record carrier, instrument, computer parts, etc., can solve the problems of difficult cost, increase of card cost, acceptance of system users, etc., to achieve economic cost, realize zero investment, reduce The effect of system investment cost
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Embodiment 1
[0028] This embodiment is based on the fusion of radio frequency and IC card data, as shown in Figure 1. The radio frequency signal receiving antenna is connected to the signal receiving end of the MAXIM7033 radio frequency module through a matching circuit composed of a series capacitor C7 and an inductor L2. The radio frequency module is surrounded by conventional peripheral circuits, and its digital signal output interface DATAOUT is connected to the data input interface of the PIC16F688 microprocessor. 1 card, dual-interface mifare desfire card or dual-interface mifare pro card) the corresponding ports of chip J2 are connected.
Embodiment 2
[0030] The basic circuit principle of the expressway multifunctional access card of this embodiment is the same as that of Embodiment 1, the difference is as shown in Figure 2, the radio frequency signal is connected to the signal receiving end of the nRF905 radio frequency module. The radio frequency module is surrounded by conventional peripheral circuits, and its digital signal output interface DATAOUT is connected to the data input interface of the MSP430 microprocessor. 1 card, dual-interface mifare desfire card or dual-interface mifare pro card) the corresponding ports of chip J2 are connected.
[0031] After the radio frequency signal is received by the antenna in the access card, it passes through the matching circuit and enters the radio frequency module. The MAXIM7033 chip\nRF905 chip used in this circuit diagram can be replaced by other chips of the same type. After the radio frequency signal is processed by amplification, frequency conversion, demodulation, etc., ...
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