Research And Design Of Temporary Speed Restriction Portable Terminal Based On RFID Technology

With the constant acceleration of railway line, the safety of Temporary Speed Restriction has become a very important issue in train control system. The method which relied on artificial outlook of drivers to reach Temporary Speed Restriction information in traditional way has large potential safety problems, and it is not conducive to safe transport of train. There are many obvious advantages of Radio Frequency Identification technology like high recognition speed, long recognition distance, can be adapted to relatively harsh environment and so on, as a result of this, it is great suitable for the applications of Temporary Speed Restriction. It is a good solution that using RFID tag as information carrier of Temporary Speed Restriction information, using car equipment to communicate with RFID tag, as well as using portable terminal based on RFID technology to maintain RFID tag. Tag is dispatched on the railway, and when it is been past by train, the train automatically read, parsed and do some associate control.When using RFID tag in a Temporary Speed Restriction system, because of the ground RFID tag has been divided into several types according to the tradition of the speed limit, this may lead to confusion, Speed Restriction tag misplaced, and bring traffic Potential hazards. At the same time, in order to meet the daily maintenance of installed electronic tags, combined with the practical application environment, a portable, energy-efficient terminal become one necessary part of Temporary Speed System. And we need some maintenance methods. The maintenance work include dispatch, detect, remove and modify RFID tags.Based on those problems mentioned above, we have researched this topic deeply, in expectation of providing supplementation of technique on Temporary Speed Restriction and promoting the application of RFID techonology. The purpose of this paper is to design a Temporary Speed Restriction Portable Terminal Based on RFID and Embedded Technology. For this reason, this paper has concentrated on the following topics: research and design workflow, hardware and software of Portable Terminal; research Temporary Speed Restriction Background system and its communication protocol with Terminal; research the anti-collision algorithm simulation based on the dynamic framed slot ALOHA algorithm; research the low power technology.