The invention discloses a multi-person walking race
system based on a semi-active RFID electronic tag, and the
system comprises an active RFID
card reader, a 125KHZ low-frequency
exciter, a double-frequency semi-active RFID electronic tag, a
liquid crystal big screen, and an upper computer
server. The 125KHZ low-frequency
exciter is used for enabling a 125KHZ
signal to cover a start line in a playing field, activating a 125KHZ
signal of the double-frequency semi-active RFID electronic tag, and enabling the double-frequency semi-active RFID electronic tag to emit a 2.4GHZ
signal. The active RFID
card reader receives the 2.4GHZ signal emitted by the double-frequency semi-active RFID electronic tag. The active RFID
card reader transmits the read tag signal to the upper computer
server, and the upper computer
server receives and processes the signals, and then transmits the processed signal to the
liquid crystal big screen for displaying the number of cycles and a current place in a competition in real time. The
system can achieve the full-automatic statistical operation of the scores of
athletes, can display the scores of the athlete in real time, can give the scores after competition, and is accurate, instant and fair in statistical result.