Intelligent transportation system based on RFID technology combined with SIM card
In recent years, with the rapid growth of automobiles, especially private vehicles, the demand for transportation has been increasing, and the level of urban transportation infrastructure construction and traffic management is relatively backward, which has led to frequent traffic congestion in cities, especially in large and medium cities. In recent years, the average number of cars in domestic cities is increasing at a rate of more than 15% per year, and the future may be faster. The average annual increase of roads is only 4% to 5%. The growth of roads is far behind the growth of automobiles, and urban traffic congestion has experienced an unprecedented rapid growth.
Simply increasing the construction of transportation infrastructure, expanding the road area, and increasing police resources have failed to effectively solve the traffic congestion problem. Therefore, it is necessary to introduce new technologies, combine mobile phone SIM card and RFID radio frequency technology, establish a set of mobile phone as the carrier, combine the SIM card and RFID technology as the technical principle, and obtain dynamic traffic information in real time and publish it to the owner's mobile phone. Intelligent transportation system.
Based on the above content, based on the principle of RFSIM technology, it is proposed to establish an intelligent traffic information collection, analysis and real-time display system. The system can effectively alleviate urban traffic pressure, reduce environmental pollution, reduce the incidence of traffic accidents, save energy, and release traffic information in real time. It has important theoretical value and good application prospects.
1.RFSIM technology
(1) The basic principle of RFSIM technology
RFSIM is the abbreviation of Radio Frequency Identification (RFID) and mobile phone SIM card, that is, radio frequency identification SIM card. RFSIM technology was first used in mobile payment systems and is currently one of the technologies applied in mobile payment systems. RFSIM can be installed on mobile phones for medium and long distance identification and close financial payment. The SIM card is an abbreviation of the SubscriberIdentityModel (known as the SubscriberIdentityModel). It is also called a smart card and a user ID card. The digital mobile phone must be equipped with this card to be used. RFSIM expands the function of the traditional mobile phone SIM card by embedding the RFID chip in the SIM card, and is the basic carrier for the future use of the mobile phone.
RFSIM adopts wireless radio frequency communication mode, which embeds the module with RF radio function in the excess card base space of SIM card, uses 2.4G microwave frequency for data communication, and realizes active RFID card through mobile phone power supply. The use of RFSIM technology can realize functions such as e-wallet, online payment, identification, electronic bills, electronic documents, and OTA, and realize the unification of various internal management functions, making management more standardized and efficient, and its technology is being widely used. Payment of daily life and consumption of government and enterprise units, businesses and individuals. Among them, RFID technology is one of the most outstanding and widely used technologies in automatic equipment (AEI) technology. It has the advantages of easy control, simple and practical, strong anti-interference, high recognition rate, good reading and writing distance and high safety performance. RFID technology has important applications in systems such as automatic vehicle identification and non-stop electronic charging.
(2) Development status at home and abroad
RFID technology has developed rapidly in foreign countries and is widely used. The application of RFID technology in Sweden has greatly improved the development of the city's transportation system. The traffic congestion in Stockholm, Sweden, was very serious, so the Swedish authorities announced the imposition of a “road congestion tax†in early 2006. With the help of IBM, Stockholm has set up 18 roadside control stations on the road to the city centre, using RFID technology and using lasers, cameras and advanced free-vehicle roadside systems to automatically identify vehicles entering the city centre. Automatically collect taxes on registered vehicles entering and leaving the city center between 6:30 and 18:30, Monday to Friday (excluding holidays). By collecting the “road congestion taxâ€, the traffic flow is reduced, traffic congestion is reduced by 25%, the time required for traffic queuing is reduced by 50%, road traffic emissions are reduced by 8% to 14%, and greenhouse gas emissions such as carbon dioxide are reduced by 40%. %. RFID technology has also been successfully applied in the natural environment of Ireland. In the Wisdom Bay project in Galway Bay, Ireland, the system takes information from sensors mounted on hundreds of buoys and gets text messages from fishermen to learn about dangerous objects floating on the surface. Information is used in various sources, including avoiding fishing boat crashes, sending water warnings to Galway Bay administrators, and helping fishermen sell the caught fish directly to restaurants, allowing them to earn higher profits.
The application of RFID in China is also very extensive. At present, RFID technology and its application are in a period of rapid rise and are recognized by the industry as one of the most promising technologies of this century. RFID technology has been widely used in vehicle automatic identification, non-stop electronic toll collection system, equipment (logistics) automatic identification system, access control identification system and commodity anti-counterfeiting identification system. Therefore, the application of RFID technology to achieve real-time traffic information acquisition, on this basis to achieve dynamic navigation and other services, has good technical conditions and market conditions. Practice has proved that the use of radio frequency technology in urban transportation systems can improve traffic conditions, improve road management efficiency, and improve road capacity.
2. Intelligent transportation system based on RFSIM technology
(1) System composition and structure
The RFID technology is applied to the urban traffic management system to form an intelligent traffic management system. The system mainly includes: RFSIM card and mobile phone, medium and long distance RFID reader, intelligent electronic police, communication network, database processing platform, central management. System server and other systems. The basic composition is: the identity of the RFSIM card is globally unique, and each owner's mobile phone card uses a SIM card with an embedded RFID chip, and the identity identification number of the card is associated with the corresponding license plate number in the database management system. Bind to form an electronic license plate; install a remote RFID reader and intelligent electronic police at each direction of the urban traffic intersection, number each reader; reader, intelligent electronic police and traffic light control The device is connected to the remote central management system server through the Ethernet controller; the server is optimally arranged in the database to realize real-time fixed-point collection of the vehicle information on the urban road, and the fixed-point instantaneous speed, time, vehicle type and license plate obtained by the RFID reader/writer And traffic, through data verification, matching and fusion algorithms, converted to the interval average speed, traffic flow, and travel time of the road segment where the information acquisition unit is located. Then, using operations research, short-term traffic flow prediction model, car-following model and other methods to achieve the analysis and prediction of urban traffic network conditions, the use of road network state discrimination technology to achieve travel dynamic route guidance and travel time estimation. Finally, the road network information can be displayed through the screen of the mobile phone or the STK package text message can be used to realize the voice prompt, which is convenient for the driver to grasp the traffic information of the whole road section and realize safe and fast travel.
(2) How the system works
The mobile phone communication system based on RFSIM card can realize the function of medium and long distance wireless communication, which can replace the RFID carrier installed on the vehicle. The technical principles based on the RFSIM card mobile phone communication system are as follows:
The RF module uses 2.4G frequency for data exchange and adopts the ISO14443 standard.
The RF module is loaded onto a normal GSM SIM card, and the SIM communication function is unchanged;
Support UMTS/CDMAUIMandPHSPIM standards;
Compatible with existing GSM/UMTS;
The data between the RF-SIM and the RFID reader is consistent with the standard RFID card and Reader principle;
RF14443 is used within the Bluetooth spectrum and does not require a license;
SIM/UIM/USIM/PIM is used in standard mobile phones for the purpose of storing user information, identity authentication and providing storage space for SMS;
The Sim tool suite is a series of instructions for directing the SIM card to interact with the outside, also known as the STK toolkit;
The STK tool software is used between the RFSIM and the mobile phone to obtain real-time road network information through the STK toolkit, and the realization of the road network information on the mobile phone through the screen and the keyboard (real-time information reminding and display function);
The RFSIM card is powered by a mobile phone, enabling long-distance card reading in RFID.
Using radio frequency technology, the traffic flow through each traffic intersection can be read out in real time through the card reader installed at each traffic intersection. Combined with the database platform of the control center, the vehicle passing through each traffic intersection can be determined. Information; according to the traffic flow on the traffic road, the optimal control of the traffic signal delay of some streets can be implemented to achieve the purpose of optimal control; by reading the information vehicle through the reader, the simple calculation can be obtained The running time required for each road segment, and then the analysis of the traffic operation state; using the intelligent electronic police system based on digital image processing technology, can automatically identify the illegal vehicles at the traffic intersection, combined with the ID number read by the RFID technology, can determine the specific Relevant information on illegal vehicles and owners; statistics on vehicle parameters and models at various traffic intersections, so as to provide statistical analysis of traffic conditions throughout the city to provide a basis for future urban traffic construction and planning.
At the same time, the RFSIM card supports functions such as mobile payment transactions. The vehicle uses the mobile phone payment system to perform background settlement processing with the bank through the special short-range communication between the microwave antennas on the ETC lane of the expressway toll station, so as to achieve the purpose of paying the fee through the road and bridge toll station without parking. The capacity and charging efficiency of the toll gates.
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