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Patent Searching and Data


Title:
RACE TIMING SYSTEM, TIMING DEVICE AND TIMING METHOD
Document Type and Number:
Japanese Patent JP2007018331
Kind Code:
A
Abstract:

To provide a race timing system that can time competitors appropriately even if generated electromagnetic fields and reception sensitivities vary.

A loop antenna 20 comprises a substantially rectangular antenna part and a substantially 8-shaped antenna part, and generates an electromagnetic field of a predetermined electromagnetic field strength distribution on each antenna part according to a signal supplied from a signal generation device 10. A radio tag 50, when detecting the electromagnetic field generated by the loop antenna 20 for the first time, measures the electromagnetic field strength for a fixed time to set a threshold. When the second pole change point in the electromagnetic fields on the loop antenna 20 is detected after the threshold setting, the time measured at the timing is specified as a race time. The radio tag 50 sends the specified race time and the like to a receiver 30.


Inventors:
MIKI YASUTOSHI
FUKUDA KAZUHIRO
Application Number:
JP2005200057A
Publication Date:
January 25, 2007
Filing Date:
July 08, 2005
Export Citation:
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Assignee:
SEIKO PRECISION KK
International Classes:
G07C1/22; G04F10/00
Attorney, Agent or Firm:
Kimura Mitsuru
Takanori Mamoru