Period
2022.10-2023.9
Cooperative unit
Beijing TACS Company,
CRRC Puzhen Alstom Transportation System Co., Ltd.
Tsinghua University
Introduction
At present, almost all of the sensing systems used for accurate positioning of trains in the domestic rail transit field come from the United States, European high-tech companies, with technology monopoly, their domestic products have a high price. Taking the sensing system provided by Sweden's TagMaster company as an example, the price of ordinary tag has reached 3,000 yuan / piece. Therefore, how to break the monopoly of foreign technology, solve the problem of stuck neck in the rail transit field, and develop a sensing system with completely independent intellectual property rights for precise positioning of rail has become a major problem in the rail transit industry. Based on the laboratory's technology accumulation in the field of Internet of Things for many years, this project cooperates with Beijing TACS Company, CRRC Puzhen Alstom Transportation System Co., Ltd. and Tsinghua University to use a number of advanced technologies to design and manufacture sensing system products with completely independent intellectual property rights, excellent performance and affordable price for rail transit precise positioning scenarios. This project is committed to filling the technical shortcomings and market gaps in this field in China, and is of great significance to improve the level of domestic rail transit informatization and autonomy.
These sensing system developed in this project consists of two parts: reader and positioning beacon.
Methodology
This project takes the internationally advanced TagMaster's sensing system as the research object, and through the implementation of the two-step strategy, it will eventually completely replace the company's products and realize complete autonomy and localization in the field of sensing systems for precise positioning of trains.
Phase 1: Develop a generation of Railway Starlink tag suitable for TagMaster readers.
The tag uses backscatter communication technology combined withthe TagMasterwireless communication protocol to achievea perfect adaptationwith the TagMasterreader. Through the design of the energy harvesting system, the tag can reach a life of nearly 10 years. The Railway Starlink tags has excellent performance and moderate price, which can completely replace similar foreign products. The overall architecture diagram of the Railway Starlink generation of beacons is as follows:
Phase 2: Independent research and development of the entire sensing system
The system intends to use Bluetooth communication protocol, and usedirect modulation technology to achieve high-reliability wireless transmission. Compared with the TagMaster sensing system, our self-developed system will have stronger high-speed reading performance, longer service life and relatively moderate price.
