With the expansion of the city scale and the improvement of people's living standards, the number of vehicles on the roads has become more and more. This not only increases traffic pressure but also puts higher demands on vehicle management. Is there any new technology to solve these problems? Of course, the answer is that it is a smart electronic license plate.
Mention smart electronic license plates, many people will be curious, here we should give everyone a look what is a smart electronic license plate and the future development trend. At present, the most common positioning and recognition of the license plate basically relies on image recognition. After the license plate number is detected and compared with the list in the database, the image recognition is greatly affected by environmental factors, and the license plate recognition is easy to make mistakes. There are often blind spots, and these uncontrollable factors limit the further development of image recognition.
In order to solve this series of problems, intelligent electronic license plate came into being, intelligent electronic license plate is based on RFID technology, and RFID technology as a new non-contact automatic identification technology, and traditional video and image processing license plate recognition technology Compared to RFID-based vehicle recognition, high accuracy, less susceptible to environmental impact, no blind spots, you can accurately and fully access the vehicle's status information and road network traffic conditions. Future trends will be the identification of electronic license plate recognition gradually replace the traditional way.
Figure 1 car electronic identification
Electronic license plate is based on the core of RFID technology, electronic tags, RFID tags and is divided into two types of active and passive, the advantages and disadvantages of two labels as shown in Table 1.
Table 1 electronic label comparison
Taking into account the service life of electronic license plate and the use of the scene, passive electronic tags with long life, easy to install small size, low cost, more suitable for vehicle installation. The choice of communication distance, UHF UHF 860MHz ~ 960MHz passive RFID tag with long distance communication, transmission speed advantages, the use of electronic license plate recognition is a very good choice. Since the electronic license plate recognition prospects so broad, then it certainly has many advantages over traditional image recognition technology and features, specific to the basic requirements and technical advantages reflected in where? We simply list a few as follows:
The basic requirements of electronic license plate:
1, can store data (vehicle model, color, owner information);
2, long-distance reading identification tag, fixed reading equipment at a distance of 10 meters;
3, high reliability, read success rate as high as 99.99%;
4, can identify a large number of labels, the maximum per second more than 200;
5, Precise identification of high-speed movement of the label, mobile identification speed of up to 100km / h or more.
Electronic license plate technical advantages:
1, data encryption, tag communication process using a unique algorithm, third-party devices can not read;
2, easy to install, without any special installation tools or materials;
3, a unique card, garage marshalling matching algorithm that can accurately determine the illegal use of motor vehicles;
4, all weather, you can work reliably in any weather conditions.
It is precisely because of the many advantages and characteristics of electronic license plates over traditional license plates. It is foreseeable that in the near future, motor vehicles will gradually replace the current traditional license plate with electronic license plate with electronic tags. In this way, Of the electronic license plate to the back end of the license plate recognition, data transmission, vehicle management, data storage, terminal inquiries and other platforms for the construction and development prospects are very broad, Figure 2 is a schematic diagram of the composition of the entire platform.
Figure 2 platform architecture diagram
Finished the principle and advantages of the electronic license plate, there may be "old driver" began to wonder, is not really electronic license plate? Where is the specific application? Next, we simply chat about the application of electronic license plate.
Scene 1: Wisdom parking system
Speaking of most of the current parking management, may be a lot of "old drivers" have encountered more or less parking difficult, expensive, no parking spaces and so on. In order to solve these parking problems, in recent years, the national policy clearly put forward the application of high-tech such as vigorously promoting the smart parking system and automatically identifying the license plate. In short, the wisdom of parking "wisdom" is reflected in: smart to find parking spaces + auto parking fee.
So, how to achieve the wisdom of parking it? Let's take the most common car park. The main technology is license plate recognition technology and non-stop electronic toll collection (ETC) technology. Vehicles equipped with electronic license plates before entering the parking lot, smart parking system through the electronic license plate recognition device can accurately identify the identity of the vehicle over long distances, record vehicles into and out of time to accurately charge, so that vehicles pass quickly without parking manual records. When the vehicle stops at the end of the parking lot, the smart parking system will make a short-distance communication with the license plate through the license plate recognition antenna and will automatically complete the whole process without any driver's stop and other charge personnel.
Figure 3 smart parking system
Through the application of smart parking system can improve the efficiency, to prevent the toll station traffic "bottleneck", at the same time through RFID technology to achieve unmanned intervention fee, effectively curb the evasion of parking fees, payroll negligence, favoritism and other behaviors , While reducing toll station management costs, faster recovery of infrastructure investment.
Scene 2: Intelligent Traffic Management System
RFID technology can be used as an effective means of information collection of traffic dispatch system and applied in traffic dispatch management system. Such as the RFID application in the bus depot management system can be achieved with the electronic license plate bus entering and exiting the station information automatically, accurately, long-distance, non-stop acquisition, the bus dispatching system to accurately grasp the bus parking bus real-time dynamic information. Through the implementation of the system can effectively improve the management level of the bus, the data collected by the computer research and analysis, you can grasp the rules of the vehicle to eliminate the loopholes in the vehicle management to achieve intelligent bus management and enhance the city's image.
Figure 4 bus management system
In addition, using RFID as a technology means high economy, compared with technologies such as Global Positioning System (GPS), it has the advantages of convenient installation, strong adaptability, low cost, and no need to transform vehicles. At the same time also for some garbage transport vehicles, dangerous goods transport vehicles and other special service vehicles for special scheduling and management. Harvatek uses electronic license plate mounted on the vehicle to place identification equipment at the monitoring points of specific sections to monitor whether the vehicle is traveling according to the specified route and to locate the accident vehicle in time when an emergency such as a leak occurs.
Through the introduction of the above two practical scenarios, we have a more intuitive and clear understanding of the electronic license plate, Figure 5 is an electronic license plate in a specific industry application example, from which we can see the key to the application of electronic license plates , Can not do without reading and writing equipment and data transfer. Zhi Yuan Electronics introduced IoT7000A-LI network controller, using Cortex-A7 core i.MX6UL multimedia application processor as the core, clocked at 528MHz, dual Fast Ethernet, onboard dual MiniPCIE interface design, expandable GPRS / 3G / 4G, ZigBee, LoRa, WiFi, GPS / BeiDou and other wireless communication modules, set up a bridge between LAN and WAN, with the license plate recognition antenna can easily read and transmit license plate data, and can be -40 ℃ ~ 85 ℃ temperature range of stable work to meet the harsh conditions of various industrial applications, is to build an intelligent traffic system essential goods.
Figure 5 electronic license plate in the industry
Figure 6 IoT7000A-LI network controller
In the future, with the progress of science and technology, from smart wearable to smart travel, the smart city in the future will also be closer and closer to us and people's travel will become more convenient. Let us look forward to the beautiful Future.
