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The system uses the special microwave short-range communication between the vehicle-mounted active electronic tag installed on the vehicle windshield or other parts of the vehicle body and the long-distance reader on the ETC lane of the toll station, and uses computer networking technology to conduct background settlement with the bank. Processing, so as to achieve the purpose of paying road and bridge tolls without stopping vehicles passing through road and bridge toll stations. The non-stop toll collection system mainly uses automatic vehicle identification technology to identify the number of passing vehicles through the signal transmitting and receiving device of the roadside lane control system, and automatically deduct the toll from the user’s special account.
2, Technical principles
The system collects the information of the radio frequency card through long-distance, non-contact, realizes the automatic identification of the vehicle in the fast-moving state, so as to realize the automatic management of the target. This system product integrates computer software and hardware, wireless communication, information collection and processing, data transmission, network communication, automatic control and smart card production and other technical comprehensive applications. It belongs to advanced intelligent traffic information collection equipment and high-security intelligent identification system , Is an important technical means that can effectively carry out automatic identification and networked supervision of vehicles.
With current technical means, only active electronic tags can complete stable high-speed identification. The reading distance of the Bisa long-distance reader can reach 100 meters, and the reading reliability can reach 100%.
3.Technical system composition
3.1, hardware system composition
The non-stop toll collection hardware system consists of three parts: the toll station data collection part, the data transmission part, and the monitoring management part.
Toll station data collection equipment mainly collects time and location information of vehicles passing through non-contact remotely. The toll station data acquisition equipment is composed of several toll stations to form a local area network, and each toll station is equipped with the following equipment:
(1) Long-distance reader
(2) Actuator controller (used to control cameras, traffic lights, alarms, etc.)
(3) Camera
(4) Traffic lights
(5) Alarm
(6) Industrial PC
(7) Uninterruptible power supply
The data collection system mainly realizes quickly reading the card numbers of passing vehicles without stopping, and uploading them to the toll management center; judging the legitimacy of the card numbers held by the vehicles and controlling the action of traffic lights; releasing vehicles with valid cards with green lights; vehicles holding invalid cards with red lights Prohibited; for vehicles without a card, send a warning signal to the control center or capture images of the vehicle.
Each toll station is the basic management unit in the system, and its data is connected through the network, and the relevant information of the vehicle traffic is transmitted to the control center in real time through the computer network via a dedicated cable (usually using a single-mode optical fiber). The image capture device will automatically capture and store the image of the vehicle for verification.
Data transmission is mainly to complete the network connection between the toll station and the monitoring room or the toll management center. It is composed of several toll station data collection equipment through IP protocol to form a wide (local) area network, data transmission configuration network communication interface equipment, digital switches, optical transceiver equipment, network terminal equipment.
The monitoring management part is mainly to complete the processing of uploaded data, provide complete traffic record reports and automatically generate various charging data, customer statements, traffic flow statistical reports for query and printing, and real-time monitoring of vehicle traffic status, and save the data Machine for inspection; when a vehicle enters illegally or does not pass through the prescribed passage, the system will alarm. Monitoring and management configuration network server, management computer, uninterruptible power supply, system software.
The monitoring and management part collects and stores the pass data of each monitoring point processing computer in real time, and performs logical judgment and processing; completes the storage and backup of various information for inspection by auditors. Automatically generate statistical reports of various data and traffic flow for query and printing; responsible for issuing radio frequency cards, establishing user files, modifying card archive data, setting user query passwords, etc., to ensure the legitimacy and security of card issuance operations. Set up a card loss report, card replacement, card clearing, card refund, and user service inquiry system.
4, Vehicle Active Tag & Reader
4.1, vehicle-mounted active tags
4.2, car reader
The vehicle-mounted reader/writer adopts advanced 0.18um CMOS circuit with low cost and high density. Active RFID reader/writer can also be used in flammable and explosive occasions, such as gas stations, chemical plants, etc., due to its low power consumption characteristics. The reader interface is diversified, suitable for various radio frequency identification schemes, and can also carry out various network layouts. The antenna is an omnidirectional design, which can identify and track targets in all directions. Users can adjust the recognition distance of the reader according to actual needs to make the recognition range more accurate.
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