射频识别设备便携式检测仪的设计

Design of Portable Tester for RFID Devices

设计了一种便携式检测设备,可对射频自动识别系统的射频特性进行检测,采用预分频法测量工作频率,检波法测量辐射场强,定向耦合器法测量天线输入端功率,并通过单片机完成数据采集和处理.实践表明:测量准确度满足铁路车号识别系统的检测要求.

A portable tester is presented in this paper, which can be utilized in detecting RF characteristics of RFID(radio frequency identification) system. The operating frequency is measured by pre -frequency division method, the intensity of radiation field is measured by demodulation method, and the input power of the antenna is measured by directional coupler method. The data acquisition and processing is computed by chip microcomputer. The measurement accuracy is in good agreement with the requirement of detecting railway carriage number identification system.