RFRD (radio frequency identification)-based timing method, device and system

Abstract

The embodiment of the invention provides an RFRD (radio frequency identification)-based timing method, device and system. The method comprises the following steps: after a timing chip is activated, calculating the time difference value between time when the timing chip sends out a chip identification number and the time when the timing chip is activated; randomly selecting an integer Nrandom between the maximum time slot number Nmax and the minimum time slot number Nmin which are set in advance; after the duration Nrandom multiplies by the duration ts of each time slot, sending a timing data packet to a reader, and calculating the time when the timing chip is activated by the reader according to the time when the reader receives the timing data packet and the time difference value between the time when the timing chip sends out the chip identification number and the time when the timing chip is activated. Compared with the prior art, the RFID-based timing method, device and system provided by the embodiment of the invention can be used to precisely calculate the time when the timing chip is activated.

Description

technical field [0001] The invention relates to the communication field, in particular to a timing method, device and system based on radio frequency identification. Background technique [0002] At present, more and more large-scale and high-level competitions use electric timing to calculate the scores and ranks of the contestants. The main principle of the existing timing method based on radio frequency identification (Radio Frequency Identification, RFID) technology is that contestants carry a sports timing tag that includes a chip in the game, and the memory in the chip stores an identification for distinguishing the identity of the player. No. Place a radio frequency identification reader and antenna at the timing point, and make the radiation range of the antenna coincide with the timing line. When the player passes the timing line, the chip in the electronic tag is activated, and the chip sends the chip identification number stored in it to a wired or Send it to th...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose a timing method, device and system based on radio frequency identification, which solves the problem that the time when the timing chip is activated cannot be accurately calculated in the timing method based on radio frequency identification technology in the prior art, and can accurately calculate timing The time when the chip is activated

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