Abstract
The attendence system uses RFID to realize practicable function for ground operation of coal industry. Each worker is given by a 2.4GHz passive RFID card in order to be recognised by the system. And technologies such as database, internet and microwave communication are combined with B/C structure, which enables the comsumer to manage and operate the system convenietly wherever has the access to the Internet. Also a UDP protocol applied here to make the communication effectivly and works fast. According to the applications among several coal industry enterprises, it indicates the system has the advantages such as user-friendly, fast communication, accurate data transfer, and strong anti-jamming ability etc.
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