The Design Of Automatic Identification System For The Optical Fiber Link Of The Model LC Based On HF RFID Technology

In the environment of the rapid development of optical fiber transmission technology and the lower cost of optical fiber equipment,more and more optical fiber equipment is used in the field of communication,which has the characteristics of fast transmission rate,low bit error rate,good stability and low cost.Compared with traditional twisted pair transmission,it has incomparable advantages.Among all optical fiber equipments,the optical interchanger,as a traditional electrical signal and optical signal coupling and conversion equipment,as an indispensable component of the entire optical fiber transmission system,plays an important role.The optical ports on the interchanger's board are interconnected by optical fibers,but there are many optical ports on the board,and the port spacing is extremely narrow(1.5mm).In addition,it is intricate and complicated.and the management of optical fibers and the adaptation of optical fiber links have a high error rate,which takes a lot of time and resources.In order to realize the rapid detection of the interconnection between the optical ports on each interchanger,a miniaturized,low-cost,long-life,high-integration,and high-precision detection system is urgently needed.In response to this demand,this thesis designs a set of automatic identification system for the optical fiber link of the model LC based on HF RFID technology to solve the problem of quickly detecting the optical fiber link matching between many optical ports on the optical interchanger.The main work and achievements of this thesis are as follows:1.A feasible scheme for using HF RFID technology to identify the matching relationship between the optical port and the optical fiber on the optical interchanger is realized,and the electronic tag and reader-writer's antenna whose volume is much smaller than the commercial HF radio frequency card are designed.The optical fiber and connector of the model LC that can be equipped with the above electronic tags and readerwriter's antennas have been successfully designed,which provides a substantial reference value for how other model of optical interchanger to be equipped with RFID systems.2.Design a set of HF RFID system with the number of antennas up to 256,and the each antenna channel has consisitent electrical characteristic whose output power is continuousely adjustable within the range of 15 d B.A single-board routing scheme for RF differential signal lines with the same electrical characteristics and equal routing lengths for each of the 256 antenna channels is realized.By precisely controlling the distance between the reader-writer's antenna and the electronic tag and the magnetic flux generated by the reader-writer's antenna,the problem of communication crosstalk caused by the extremely minute spacing between each optical port on the interchanger when using RFID technology for the optical fiber link identification is solved.3.Completed the software development of the embedded firmware and host computer program of a whole set of the automatic identification system for the optical fiber link of the model LC based on HF RFID technology,and successfully realized all the functions of the ISO/IEC 15693 protocol,so that the designed HF RFID reader-writer can quickly and accurately complete the time-division scanning of the optical fiber,which in the optical ports of the optical interchanger.