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Registered METHOD FOR MEASURING SPEED OF VEHICLE USING RFID, RFID READER FOR MEASURING SPEED OF VEHICLE, AND SYSTEM FOR COLLECTING VEHICLE INFORMATION USING THE SAME
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METHOD FOR MEASURING SPEED OF VEHICLE USING RFID, RFID READER FOR MEASURING SPEED OF VEHICLE, AND SYSTEM FOR COLLECTING VEHICLE INFORMATION USING THE SAME
- Inventors
- Park Kyung Hwan, Kang Taeyoung, Seok Bong Hyun, Kang Sung Weon, Kim Jung Bum, Kim Kyung Soo, Choi Byounggun, Lim In Gi
- Application No.
- 12475492 (2009.05.30)
- Publication No.
- 20100123558 (2010.05.20)
- Registration No.
- 8274371 (2012.09.25)
- Country
- UNITED STATES
- Project Code
- 08MB2400, Controller SoC for Human Body Communications, Kang Sung Weon
- Abstract
- A technique for simultaneously acquiring vehicle identification information and speed information of an RFID tag-attached vehicle by calculating the vehicle speed by using a Doppler shift value extracted from transmission and reception signals between the RFID tag and the RFID reader is disclosed. A method for measuring a vehicle speed by using an RFID reader installed right up on the road or at the roadside includes: transmitting a continuous wave; receiving a reflected wave with respect to the continuous wave from an RFID tag attached to a vehicle which has received the continuous wave; extracting a Doppler shift value from the continuous wave and the reflected wave; and calculating the speed of the vehicle by using the Doppler shift value.
- KSP Keywords
- Doppler Shift, RFID Tag, RFID reader, continuous wave(CW), identification information, reflected wave, vehicle identification, vehicle speed