Title:
Competition time measurement system
Document Type and Number:
Japanese Patent JP6301785
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To accurately measure a passage time of a competitor with fewer frequency channels, in a time measurement system for competition configured to measure a passage time of the competitor at a measurement point in a race course, using an RFID tag attached to the competitor.SOLUTION: Antennae not neighbouring with each other are paired. In respective reader/writers connected to the paired antennae, a carrier sense is performed using the same frequency and at the same timing. If the carrier sense succeeds, carrier radio waves indicating this are sequentially transmitted at a different timing from each other via the connected antennae. When carrier radio waves are transmitted from all reader/writers in the same pair, reading of a tag ID from an IC tag 10 is started at the same timing at the frequency.SELECTED DRAWING: Figure 1
Inventors:
Shinichi Kubota
Application Number:
JP2014175472A
Publication Date:
March 28, 2018
Filing Date:
August 29, 2014
Export Citation:
Assignee:
Toppan Forms Co., Ltd.
International Classes:
G04F10/00; A63B71/06; G07C1/24; H04B5/02
Domestic Patent References:
| JP4501030A | ||||
| JP8057104A | ||||
| JP2006157698A | ||||
| JP2010187412A |
Foreign References:
| US20100265801 |
Attorney, Agent or Firm:
Akio Miyazaki
Masaaki Ogata
Masaaki Ogata
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