ETC and RFID technology truly make all the way smooth

Due to the rapid development of expressways, the number of vehicles and manual toll collection during peak periods have caused very large vehicle congestion and low toll collection efficiency. At present, networked charging is vigorously promoted, and vehicles are automatically identified and charged. In order to achieve accurate billing and accurate splitting, highway multi-path identification has become an important task in the current highway construction and operation. The 5.8G frequency band has the advantages of high speed and high bandwidth. In terms of future automatic deduction business development, a variety of vehicle information services can be carried out. The 5.8GHz RFID system is the working frequency band of my country's ETC, and it took the lead in formulating the national ETC standard. ETC and RFID technology truly make the whole journey smooth.

ETC (Electronic Toll Collection, electronic non-stop toll collection system) is an advanced toll collection method that is currently strongly promoted by countries around the world. The car owner only needs to install the electronic tag on the car window. When the vehicle passes through the toll station, the electronic tag of the passing vehicle is read and written through the reader and writer set up at the toll station, and the electronic tag is automatically read from the pre-bound radio frequency card or bank account. After deducting the corresponding fees, car owners can quickly pass through the toll station without parking and manual payment, making the journey truly smooth.

The ETC system is mainly composed of automatic vehicle identification system, central management system and other auxiliary facilities. Among them, the automatic vehicle identification system consists of OBU (On board unit), RSU (Road side unit), loop sensors, etc. OBU (electronic tag) Stores vehicle-related information and is generally installed on the front windshield of the vehicle. RSU (reader/writer) is installed next to the toll station. Loop sensors are installed under the roadway floor. The central management system stores a large amount of information about registered vehicles and vehicle owners. When the vehicle passes through the toll station, the loop sensor senses the vehicle, the RSU sends an inquiry signal, and the OBU responds and performs two-way communication and data exchange. The central management system obtains the vehicle identification information and makes a comparison and judgment, and controls it according to different situations. The management system generates different operations to achieve automatic management of driving vehicles.

The ETC system uses a dedicated DSRC (dedicated short-range communication) method to exchange through long distance (10m ~ 30m), complete encrypted communication mechanism (supports 3DES, RSA algorithm), and non-contact method (working frequency band supports 915MHz, 2.45GHz and 5.8GHz) ETC information enables automatic identification of vehicles in a fast-moving state, thereby achieving automated management of targets.

Compared with the previous manual toll collection system, the current ETC system has the following advantages:

1. Pass without stopping and optimize the traffic structure

Drivers can pay automatically through the ETC system without stopping, which effectively improves the vehicle traffic capacity of toll stations, avoids traffic jams caused by toll stations, and improves highway utilization.

2. Calculate segmented charges and make prices public

Drivers paying through the ETC system means that more vehicles will pass through per unit time, thus speeding up payment and improving payment efficiency.

3. Save resources and reduce exhaust emissions

The ETC system reduces the waiting time for vehicles to pay manually at toll stations, reduces fuel consumption, and reduces exhaust emissions when the vehicle is idling, thus achieving the effects of saving energy and protecting the environment.

The mature application of ETC system is of great significance for the future development of Intelligent transportation. At present, this technology is also being used for automatic vehicle toll collection in central areas of cities. For example, it is gradually being vigorously promoted and applied in intelligent parking lot management. As an emerging automatic identification technology, RFID technology has the advantages of barrier-free reading and long-distance penetration, fast scanning, high storage capacity, small size, and good security and confidentiality. It is widely used in various fields and has great development. potential.