| This file in detail describes the development course of the gas measurement charging,the composition of the IC card prepayment gas meter application system,IC card classification and the application analysis for the smart card prepayment gas meter.The whole text includes three parts,the IC card classification and feature, the hardware design for the smart card prepayment gas meter application system,the software design for the smart card prepayment gas meter application system.It also describes the composition and application analyze for every part of the smart card prepayment gas meter application system.The key technology in it includes sensor technology,single chip and interface technology,IC card technology, communication technology and precision mechanical technology.The first part of the design is IC card classification and feature。According to the different integrate circuit inserted in the IC card, the IC card can be divided into memory card, logical encrypt card, smart card (CPU card) and so on. They have different safety level of the data protective. Viewing on the physics structure and safety mechanism of the card, doing the deep research for the memory card, logical encrypt card, smart card (CPU card).We can know the smart card has higher safety level by analyzing the physics structure and safety mechanism for the memory card, logical encrypt card, smart card (CPU card).It analyzes aim at the inner structure and application safety for the IC card and put forward the design project for using the smart card as the storage medium of the prepayment gas meter application system.The design for the smart card prepayment gas meter applying system can greatly increase the stability and safety of the system.The research of this part will make the reference to the second part for IC card sampling in the smart card prepayment gas meter application system hardware design.The second part of the design is based on the hardware design for the smart card prepayment gas meter application system.It start from system's stability, reliability and the ability for anti-interference and do the advanced research for every hardware composition in the system,in the meantime it should consider the district difference, ambience, the technical level of the operator and so on.It designs the corresponding hardware system and choose the smart card as storage medium to increase the reliability and the ability of anti-interference of the system。For the single chip design,it uses the micro power consumption MSP430 series single chip made by USA Texas Instrument Company and effectively decrease the power consumption of the system.The MSP430 F413 single chip inside LCD driver can increase the system integration and the technology design is advanced.The system for the application in the prepayment controller has the simply operation step and definite prompt information.It can achieve the reliable and simply design principle.The third part of the design is based on the software design for the smart card prepayment gas meter application system.It starts from system's extension, safety and agility and do the advanced research for every software design.It designs corresponding software system and ensure the harmony works for the whole system.The software design for the single chip and management system adopts module design thoughts, and it confirm to the principle of convenience to enlarge and maintain.It adopts the solving of setting "software trap" and "transaction processing" and so on.It increase the anti interference ability of the system and ensure the reliability and stability of the software system.In the meantime, it has the features of complete function, enlarge agility and operate simply.The composition of the management system adopts customer/server system structure.The customer end connect with the encrypt machine.The key data utilize the encrypt machine to encrypt and unencrypted dealing.It increases the safety of the management system.Each exchanged data will be stored by customer end and...
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