ELECTRONIC RADIO FREQUENCY IDENTIFICATION SYSTEM,申请号JP20010177567-传众专利搜索

ELECTRONIC RADIO FREQUENCY IDENTIFICATION SYSTEM

申请公布号：JP2002064404(A)

申请号：JP20010177567

申请日期：2001.06.12

申请公布日期：2002.02.28

申请人：

SUPERSENSOR PTY LTD

发明人：TURNER CHRISTOPHER G G;MCMURRAY JOHN

分类号：G06K17/00;G01S13/74;G06K7/00;H04B1/59;(IPC1-7):H04B1/59

主分类号：G06K17/00

摘要：PROBLEM TO BE SOLVED: To provide a method of reading a plurality of transponders, where data can be protected against damage, and a reading time can be shortened. SOLUTION: The transponders 14.1 to 14.n of an electronic radio frequency identification system 10 are required to send only the preambles 30 of response data frames to a reader 12. The reader 12 then locks onto the preamble 30 transmitted by one of the transponders and causes a mute signal 38 to be broadcast to mute all of the transponders not yet transmitting. The reader then transmits during a first time window 42 a first command signal 40 to cause the one transponder to transmit a remainder of the frame. Having received and read the remainder, the reader transmits a second command signal 44 during a second time window 46 to cause the one transponder to switch to a sleep mode and to unmute the muted transponders.