Challenges and needs
With the rapid development of China's economy and transportation, the total number of cars in China at this stage has exceeded 60 million, and it is growing at a rate of more than 10% per year. With the increase of vehicles, violations of annual inspections, misappropriation of license plates, use of fake license plates, modification of stolen vehicles, etc. are increasing. With the continuous improvement of people â€™s living standards, the number of urban taxis has increased sharply, and a few owners have refused to operate. License, or apply for low-cost operation licenses in surrounding small towns, and carry passengers to operate in large cities. This type of taxi (commonly known as "black car") violates the interests of the country and the industry; with the deepening of China's reform and opening up and the accession to the WTO, large international and domestic conferences, as well as cultural and sports exchange activities are becoming more and more frequent, the event site vehicles are blocked and undocumented Intrusion, disputes, and even criminal cases in public security have occurred from time to time; vehicle theft in some local areas is extremely serious, which has threatened the harmony and stability of the area.
Regarding the above-mentioned violations of laws and regulations, in the past, the vehicle management department mainly relied on card-setting spot checks, temporary increase of police force and duty personnel for governance. Obviously, this way of governance is extremely inefficient, and on-site verification is very difficult. In solving vehicle anti-theft, GPS has also been a relatively broad technology choice. GPS anti-theft is an active network system and a large system. The service personnel of the monitoring center provide 24/7 uninterrupted service for car owners, including alarming, bedding before the police and assisting the police. But it is not very popular at present, the main reason is that the price is too high. It takes six to seven thousand yuan to install a set of GPS without a display screen, and every year it is necessary to pay a service fee of nearly one thousand yuan to the service provider. The high cost discourages many car owners. Especially for taxi owners who are severely robbed and robbed, if not specifically required, few people are willing to equip GPS anti-theft systems with expensive equipment and services.
In this case, RFID technology can be combined to achieve the purpose of reducing costs. At present, the society is more and more inclined to adopt the automatic vehicle identification (AVI) system based on active RFID technology. The AVI system can be installed at the city entrance and exit to form an AVI fixed base station or installed on a police car to form an AVI system mobile station. The mobile AVI system is one of the practical and effective means to solve the above problems. It can be parked at the entrance of the designated venue, or the roadside, or checkpoint, or toll station as needed; it can be collected from it in real time accurately and reliably The data information of vehicles passing by (or parked) and equipped with active proximity cards are identified and processed using long-range radio frequency identification (RFID) technology, and the information is passed through the communication network (GSM / GPRS / CDMA) is transmitted to the computer of the vehicle management center, and it is compared with the information about the vehicle stored in the database to determine whether the vehicle is illegal or stolen, and the comparison judgment results and instructions are returned to the AVI system in real time to decide Treatment of the car. The comparison judgment result and vehicle related information can be printed out. For illegal vehicles that have been blacklisted, you can call the police on the spot for interception, or notify the checkpoint in front of the vehicle through the communication equipment to intercept.
1. Vehicle automatic identification system (AutomaTIc Vehicle IdenTIficaTIon-AVI) based on active RFID technology, including vehicle-mounted radio frequency tag, fixed base station AVI system and mobile base station AVI system.
1. Car radio frequency tag
Vehicle radio frequency tags have vehicle information, vehicle status, and vehicle owner information. This radio frequency tag has a unique identification code (ID Code) in the world, and the identification number and its information are stored in the information exchange network of the public security department, generally in a stand-by state until the car is stolen or the owner requests traffic Information query is only started. This identification number can help the police identify and track the stolen vehicle. Car radio frequency tags must be installed firmly, reliably, and as concealed as possible without affecting normal operation. A special installation method can be used, so that once the label is removed, the alarm service can be automatically started to prevent the label from being misappropriated.
2. AVI system of fixed base station
Using active microwave tags, the reading distance can reach 2 to 80 meters. The fixed base station AVI system is generally used in customs, checkpoints, and traffic toll stations, to inspect, identify, and record passing vehicles, and equipment (such as readers, intelligent controllers, data transmission units, power supplies, etc.) installed next to the lane In the machine room.
When the vehicle carrying the RFID tag passes through the lane, the system reads the ID identification number in the tag, superimposes the passing time and lane number, and stores it in the memory of the intelligent controller. The data transmission unit transmits the vehicle data information collected by the system to the management center (or computing center) of the public security and transportation departments through the communication network (such as DDN). Release or intercept.
3. The mobile base station AVI system needs to be equipped with a mobile AVI system in some applications, such as public security criminal investigation, road administration inspection, and important conference security. It must be activated at any time and parked at the designated roadside (or entrance of the venue) Conduct surprise inspections and identification. Its equipment configuration is similar to the fixed base station of AVI system, but it is more simplified. The mobile AVI system can be installed on a modified police car, using a mobile phone to send short messages (or other means) through the mobile communication network (GSM) to maintain communication with the command center or exchange data information. If you need to report the location of the mobile AVI system, you can also configure a GPS receiver on the car, and send a short message through GSM to transmit the geographic location of the mobile station to the command center.
4. Simple mobile inspection equipment
In some applications, you can also use a simple mobile inspection device (PDA handheld reader). Inspectors can use PDA readers to inspect passing vehicles in certain narrow areas. The PDA reader downloads the stolen vehicle information (blacklist) in advance, and once the same information is read, it immediately calls the police.
2. Anti-theft network based on AVI and GPS
The system consists of fixed AVI, mobile AVI, GPS positioning and navigation system, DDN data transmission and exchange system and GSM mobile communication system. The schematic diagram is shown in Figure 1.
When users who use this technology determine that the vehicle has been stolen, they will report to the police.
Let each fixed AVI detect the passing vehicle, read the passing vehicle's RFID tag, and then proceed with the target vehicle information
Compare. If the current vehicle is the target vehicle, the vehicle ID, the fixed AVI location and time information are sent to the police through DDN.
After receiving the signal, the police will send text SMS messages via GSM to the police car equipped with mobile AVI and GPS. After confirmation, the police car will find the best route through the route optimization on the GPS positioning and navigation system. Confirmation and route optimization, and constantly send their GPS position to other security vehicles, and finally work together to intercept the stolen vehicles, causing the criminals to be arrested. The whole process of recovering stolen vehicles is shown in Figure 2.
In addition to the anti-theft function, for vehicles equipped with a GPS system, the system can also add road and vehicle location query functions.
Under the premise of guaranteeing anti-theft, the system uses RFID technology to effectively reduce costs, can be accepted by most people, saves police force, and improves the speed of response, especially in the taxi industry has the characteristics of large-scale promotion. At the same time, the system combined with non-stop electronic toll collection (ETC) system, equipment (logistics) automatic identification (AEI) system, access control identification (GAI) system, etc., constitute an important part of the intelligent transportation system.
Note: This type of application scheme can also be adapted to the fields of anti-counterfeiting authentication management of military and police vehicles.
l High recognition accuracy and support higher traffic flow. Using frequency hopping technology, the effect of anti-inter-frequency interference is good, and multiple vehicles can be identified at the same time, and up to 200 vehicles can be identified at the same time.
l Adopt the world's unique identification number to mark the vehicle's identity, which is reliable, safe and free of duplicate numbers.
l Equipped with mobile identification station (handheld reader), which can be used under special circumstances.
l The mobile identification station is very mobile, and can exchange data with the control center at any location covered by the GSM / CDMA network.
l Low equipment cost and great system efficiency.
l Long distance: It can be recognized within 80 meters, without manual swiping or swiping in the designated area to realize full automatic recognition.
l Support high-speed mobile reading, the identification card can move more than 200 kilometers per hour.
l Two-way high-speed data exchange can be realized between the identification card and the reader.
l High reliability, working temperature -40 â„ƒ ~ 85 â„ƒ, waterproof, impact-proof, suitable for operation in harsh outdoor environment.
l High anti-interference: There is no special requirement for various interference sources on site, and the installation is convenient and simple.
l Globally open ISM microwave frequency band, no application and payment required.
l Ultra-low power consumption: safer and healthier for human body.
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