Current situation and Prospect of the application

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Current situation and Prospect of the application of RFID technology in intelligent transportation

profile: Guan zhenrou, technical director of Sichuan Xinyuan Modern Intelligent Technology Co., Ltd., once served as deputy director, chief engineer and director of the science and Technology Commission of the former Tenth Research Institute of the Ministry of Electronics. He has long participated in, organized and led the development of China's aerospace measurement and control system engineering equipment and avionics equipment. He once served as the chief designer of the measurement and control system engineering equipment of the dongfanghong-3 synchronous communication satellite, and once served as a member of the military electronics Expert Committee of the Academy of Sciences of the Ministry of electronics. Since taking practical actions, he is the recipient of special government subsidies issued by the State Council

in the early 1990s, it began to involve in the research and development of RFID and intelligent transportation products and systems engineering. Currently, he is the communication member of its standards committee of the Ministry of transport and a member of the joint toll working group

the start of RFID in China

the application of RFID in intelligent transportation in China began in the early 1990s. The early representative applications of RFID include:

the electronic license plate project used by Shenzhen Customs for vehicle customs clearance and release. Sweden combitech2.4ghz active passive label products were first selected, and then 915MHz passive passive labels were used, which has been maintained until now

products based on the 915MHz passive tag of Texas Instruments (TI) are used in the etc road and Bridge toll collection system in the Pearl River Delta region

Guangzhou adopts the 5.8GHz product of Norwegian qfree as the road and bridge charging voucher in the urban area of Guangzhou

Chongqing adopts the 5.8GHz product of Japanese Toyota Denso as the test system application of Chongqing Sanqiao etc

Beijing Capital Airport Expressway uses the 2.45GHz product of Amtech company of the United States to construct the non-stop toll system of the capital airport expressway

these systems and related products have played an important role in promoting the development of intelligent transportation in the early stage of the development of RFID technology in China. With the continuous progress of technology, most of the above products have withdrawn from the historical stage, But what they did in the initial stage of RFID, "said Cedric Kennedy, co-founder of superior filament: "However, we have the opportunity to change the way to promote this revolution. It is still indelible.

RFID is a typical application field in intelligent transportation

Expressway non-stop toll collection system

the system adopts 5.8GHz products. The Ministry of transport has formulated corresponding national standards and gradually entered the stage of promulgation and promotion. The biggest feature of the system is the integration of microwave electronic labels and contactless IC cards Source, using IC card for cost settlement, this scheme is conducive to the compatibility of etc on-board equipment with the two road resources of etc lane and MTC lane, so that the ETC system is conducive to the gradual promotion in Lianhe expressway

from the current use situation, the use of this two-piece hybrid system does not show its superiority in terms of rapid passage. The software control system of the 4-ball friction and wear tester has different functions, that is to say, the high data transmission rate between RFID RSU and OBU has no substantive effect on improving the speed of vehicles passing through the toll station. It fails to meet the expectation of the original implementation of the 5.8ghzdsrc system in Europe. In addition, the price of on-board recognizer (OBU) is high, which is also restricted by the service life of the power supply in the card, which brings many problems to the operation management. In addition, the above active 5.8GHz passive tags are only used in Lianhe highway. The ETC system applied regionally in some cities has replaced the 5.8GHz system already used with 915MHz passive tags. In addition, the 5.8GHz system is difficult to see how many opportunities there are for derivative applications in other intelligent transportation systems

local annual fee vehicle identification and monitoring system in small and medium-sized cities

some cities that have implemented the management of annual fee with RFID system are allocated a passive passive electronic tag that cannot be disassembled and its ID number cannot be modified for each annual fee vehicle. As the unique identification mark of the vehicle. Realize the annual fee of one car and one card, so as to completely plug the loophole of stealing the annual fee by using the method of Deck Cards, so as to ensure both strict supervision and smooth traffic. On this basis, the road and bridge management department can also obtain a high proportion of cost increase. In a coastal city, more than 100000 to 200000 passive electronic tags, which are only used as annual fee cards, have been issued. They have been running smoothly for several years, and the economic and social benefits are very obvious. The promotion and use of such large tags is much higher than the circulation of some highways with 10% busy traffic

this effective annual fee vehicle management mode can be appropriately promoted in small and medium-sized cities with regional closed supervision conditions

taxi identity dynamic automatic identification system

the supervision mode has many things in common with the identification management of annual fee vehicles mentioned above. A complete and detailed work plan has been formulated. Each taxi with legal identity is allocated with a unique and tamper proof RFID tag that can prove its identity. This system has been popularized and used in Guangzhou and Chengdu, and has played an obvious social and economic benefit, In cities that have promoted RFID based annual fee management, the dynamic automatic identification system of taxi identity can also be applied as a derivative subsystem of the annual fee management system

in cities that have realized the adoption of local annual fee vehicle identification and monitoring system and have the conditions to install cards on all vehicles, the system can also be extended and applied to vehicle maintenance fee collection, annual review, transportation management and other fields that need to share on-board electronic label media, and build an intelligent transportation system management platform that shares dynamic information resource base. On this basis, It can also be logically extended to the access control management of government agencies, enterprises and institutions, public parking lots and residential areas, so as to provide strong technical support for the dynamic monitoring and management in the field of public security related to vehicles

the possibility of RFID and traffic information service system

an important area of traffic information service system is to realize efficient traffic guidance for travel vehicles, optimize their driving routes through the active cooperation of travel vehicles in the process of traffic participation, and use traffic guidance information to avoid traffic congestion areas. Make the operation of traffic flow more balanced, so that the efficiency of the whole road can be brought into full play

we know that when the traffic information service system acts as the generation and manager of traffic guidance information, the system needs to enable the traffic command and control center to obtain the accurate traffic flow distribution, vehicle flow rate and traffic smoothness information of the whole road at any time, so as to generate the best traffic guidance information

the core of the idea of using RFID technology to serve the traffic guidance information system is: if the rfidobu of the vehicle realizes the personalization of each vehicle, the success rate and accuracy of the roadside equipment (RSU) on the collected vehicle data will be greatly improved, and the data utilization will be more effective. Compared with the traditional vehicle detection methods of sensing vehicle information through buried coils or using video detection, The accuracy of the statistical method for the number of passing vehicles has been greatly improved by identifying electronic labels. More importantly, the correlation of data collected based on RFID can be used to accurately detect the group speed of the whole traffic flow. This is very important. The group speed of traffic flow can directly reflect the situation of traffic congestion. Using the unique characteristics of the vehicle ID number, the time difference of the vehicle passing from one RFID detection point to another and the distance difference of calling two detection points (the buried position of the two detection points is known, so the distance is also known), so that the group speed representing the movement of the traffic flow in this section can be determined, and the information of several vehicle electronic tags in the nearby road section can be collected and smoothed, It can more accurately and carefully describe the traffic operation of these sections, and make the release of traffic guidance information more accurate and timely

in addition, another use in the idea is: through the application of active RFID on-board equipment to conduct two-way data exchange with RSU, the location where RSU is installed along the vehicle will be transmitted to the on-board digital map display device with the guidance information and other traffic information issued by the traffic command and control center through RSU. At the same time, RSU will embed the geographic coordinate information of its location into the downlink information and map it into the digital map. This system can be called discrete digital positioning system. In a sense, it can play some role of GPS in local areas. At the same time, the vehicle can also guide the driver's driving behavior according to the guidance information released by the traffic command and control center through RSU, and achieve the purpose of guidance through human-computer interaction. The downlink can simultaneously release the road condition information and important information (including temporary traffic management information) through RSU

such an active RFID system can be implemented by ZigBee and WLAN. WiFi, long-distance Bluetooth and other generalized RFID devices

with the progress of science and technology, the integration and complementarity of various technical means will become a new highlight of the transportation information service system, creating more harmonious travel conditions for transportation participants and more conducive to protecting our beautiful home

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