Does not stop collects fees ETC

　　In our country's highway charge system, increased gradually using the vehicles automatic diagnosis technology realization charge automation project using the recent years, moreover the electron will not stop the charge technology enhances the road charge efficiency as the government and the enterprise the important method.

　　This kind uses the radio signal transmitter-receiver set to distinguish the vehicles the automatic diagnosis technology to origin from Second World War time use airplane target identification system. When this kind of automatic target recognition system from military domain to civil domain shift, experimented and has implemented the many kinds of different vehicles automatic diagnosis technology, and finally chose the radio frequency/microwave recognition technology to take the charge system the vehicles automatic diagnosis technology. So far, the radio frequency technology develops gradually for does not stop the charge (ETC) the system mainstream recognition technology.

　　Does not stop the charge (ETC) the domain radio frequency recognition technology mainly refers to the work in the microwave frequency band (5. 8GHz) the short distance (8 meters - 30 meters) the communication, in the radio frequency automatic diagnosis system, on international studies and has used the frequency to have three kinds: 915MHz, 2. 45GHz, 5. 8GHz. From has completed does not stop the charge (ETC) the system to look that, the main use technology is half active electronic label (half active radio frequency card) technical and the active electronic label (driving label, active radio frequency card) the technical two kinds, the main reason is collects fees the system to the automatic diagnosis 100% reliable request, the common passive electronic label is unable in the reliable aspect to realize 100% recognition rate. Among them, 915MHz and the 433MHz system mainly uses in the North America area, in particular the container recognition system, 5. 8GHz and 2. 45GHz system mainly uses in European and Asian as well as the Oceanian area.