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Title:
SYSTEM FOR AUTOMATICALLY MEASURING RUN TIME DISPLAY
Document Type and Number:
Japanese Patent JPH11203522
Kind Code:
A
Abstract:

To provide a system for automatically and constantly measuring run time display with high precision without manual intervention.

The proposed system is provided with a radio wave transmitter 2 mounted on a boat 1, at least two antennas 3-5 which are fixed/arranged by sandwiching the extension line of a start line and the extension line of a goal line to receive radio waves radiated from the radio wave transmitter 2 and a receiver 6 connected to the antennas. The receiver 6 is provided with a phase analysis means 7 for detecting the passing instances of the start line and the goal line of the boat 1 based on the comparison of the phases of reception signals in the two antennas sandwiching the start line and the two antennas sandwiching the goal line and for outputting a start line passage signal and a goal line passage signal, and a timer means 8 for measuring run time from a time when the boat 1 passes the start line to a time when it passes the goal line based on the start line passage signal and the goal line passage signal.


Inventors:
SAITO HIDETAKA
Application Number:
JP632798A
Publication Date:
July 30, 1999
Filing Date:
January 16, 1998
Export Citation:
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Assignee:
NOBAKKUSU KK
International Classes:
G07C1/22; G07C1/24; (IPC1-7): G07C1/22; G07C1/24
Attorney, Agent or Firm:
Akihide Sugimura (8 outside)



 
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