Method for measuring speed of vehicle using rfid, rfid reader capable of speed measurement of vehicle, and system for collecting vehicle information using the same

PURPOSE: A method for measuring speed of a vehicle using an RFID, an RFID reader, capable of measuring the speed of vehicle, and a system for collecting vehicle information using the same are provided to obtain the vehicle identification information and velocity information at the same time by using a Doppler shift. CONSTITUTION: A vehicle speed is measured by an RFID reader. The RFID reader is installed in the road or in the roadside. A continuous wave is transmitted(S10). The reflected wave to the continuous wave is received from an RFID tag(S20). The RFID tag is attached to the vehicles receiving the continuous wave. A Doppler shift value is extracted from the continuous wave and the reflected wave(S30). The vehicle speed is calculated by using the Doppler shift value(S40).