Design of radio frequency identification devices
Xia Yin-li · Journal of Wuhan Institute of Technology · 2013
To solve the problems that multiple barcodes can not be identified automatically with high speed and to improve the efficiency of commodity identification,electronic label was used to replace the bar code.A kind of radio frequency identification device was designed to realize the automatic recognition of supermarket goods through the radio frequency identification channel,reader differential(middle layer) and automatic billing system.The SUNPLUS 61 microchips was used as the controller,and the coding and de-coding chip PT2262/2272 was used to realize the identification of the reading machine to the transponder,the transmit-receive controlling of the coding data,and the writing,reading and storing of the information;the analog switch TS5A3166 was used to finish load modulation;transformer coupled mode was used to realize the data transmission and energy exchanging between the transponder and the transceiver well.The reader to transponder preset information recognition,a remote wireless energy transmission and low error rate of binary digital transmission were realized in the wireless identification device.The obtained results indicate that the related data about goods is read from radio frequency tags every 250 ms,the error rate is extremely low,the transit-receive distance of the reader is more than 20 cm.