Real-time testing system and method for speed and relative position of vehicle on expressway

Abstract

The invention belongs to the field of intelligent transportation systems, and in particular relates to a real-time measurement system and method for vehicle speed and relative position of vehicles on expressways. The system: Passive transponders, equidistantly placed on the highway divider or on the left and right shoulders, each passive transponder has a unique radio frequency identification code that includes a location that characterizes its location Identification; reader, set on the vehicle, used to transmit activation signal and receive radio frequency information including radio frequency identification code from passive transponder, and exchange data with upper server through wireless communication network; upper server, used for Analyze and process the radio frequency information sent back from the reader, acquire and store real-time information including the lane, speed, and relative position of the vehicle, and send the corresponding information back to the reader. The invention also relates to a real-time measurement of the vehicle speed and relative position of the vehicle traveling on the expressway by using the measurement system. The system and method can achieve higher precision, do not need to configure a power supply on the highway, and have high reliability, low cost, and zero maintenance (for devices installed on the highway).

Description

technical field [0001] The invention belongs to the field of intelligent transportation systems, in particular to the application of RFID (Radio Frequency Identification) in highway safety management. Background technique [0002] The construction and development of the expressway network plays a very important role in the development of our country to increase productivity and enhance the international competitiveness in the context of economic globalization. In the long run, it will also have an important impact on the modernization of the Chinese people's way of life. [0003] In recent years, my country's expressways have developed vigorously, increasing at a rate of several thousand kilometers every year. As an important strategic resource of the country, the expressway has a good alignment, smooth road surface, and no interference from level crossings and slow vehicles. It not only improves transportation efficiency, but also reduces vehicle loss. Its advantages are v...

AI Technical Summary

Problems solved by technology

[0025] In the actual application of the above two patents or patent applications, the distance between the detectors is generally set at 100 meters or more, and the measurement of the real-time position and speed of the vehicle cannot be accurately detected, and if the detector If the spacing is set up very close, it is bound to greatly increase the operating cost of the system and reduce the reliability of the entire system

In addition, both of these two detection systems need to install circuit modules with active devices such as microprocessors on the highway, which is difficult to meet the performance requirements of high reliability, and there are also problems in system maintenance

Therefore, the above-mentioned patents or patent applications have technical problems in terms of road management, comprehensive identification of information on each vehicle, etc.

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