Title:
MULTIPLE-POINT SIMULTANEOUS-MEASUREMENT METHOD, MULTIPLE-POINT SIMULTANEOUS-MEASUREMENT SYSTEM AND INTERNAL CLOCKS USED THEREIN FOR ELECTRIC POWER STATION
Document Type and Number:
WIPO Patent Application WO/2012/176583
Kind Code:
A1
Abstract:
[Problem] Provided are a multiple-point simultaneous-measurement method, a multiple-point simultaneous-measurement system and internal clocks used therein for an electric power station whereby measurements at accurate times can be achieved even at places, where no GPS radio waves can be received, in the electric power station and whereby simultaneity can easily be obtained with high precision even without interconnecting multiple measurement points by use of a cable or the like. [Solution] Each of a plurality of measurement devices (12) comprises: an internal clock (21) with a time correcting means (21b); and a measuring means (22). The time correcting means (21b) corrects the internal clock (21) by determining the difference between an actually counted number of pulses generated by an oscillator (21a) in a predetermined time of period and the product of an oscillation frequency of the oscillator (21a) and the predetermined time of period, and further adding the difference to that product each that predetermined time of period. A master unit (11) wirelessly transmits a measurement time to each of the measurement devices (12). When it is the measurement time by the internal clock (21), each of the measurement devices (12) uses the measuring means (22) to perform measurements, and then wirelessly transmits the data of those measurements to the master unit (11).
Inventors:
CHIBA TATSUYA (JP)
SATO MASAKI (JP)
YANAGISAWA YOICHI (JP)
SATO MASAKI (JP)
YANAGISAWA YOICHI (JP)
Application Number:
PCT/JP2012/063605
Publication Date:
December 27, 2012
Filing Date:
May 28, 2012
Export Citation:
Assignee:
TOHOKU ELECTRIC POWER CO (JP)
CVENGINEERING CORP (JP)
CHIBA TATSUYA (JP)
SATO MASAKI (JP)
YANAGISAWA YOICHI (JP)
CVENGINEERING CORP (JP)
CHIBA TATSUYA (JP)
SATO MASAKI (JP)
YANAGISAWA YOICHI (JP)
International Classes:
G04G5/00; G08C15/06
Foreign References:
| JP2009043244A | 2009-02-26 | |||
| JP2003207586A | 2003-07-25 | |||
| JP2005140595A | 2005-06-02 | |||
| JP2006047101A | 2006-02-16 | |||
| JP2008209995A | 2008-09-11 | |||
| JP2007206848A | 2007-08-16 |
Attorney, Agent or Firm:
SUDA Atsushi et al. (JP)
Atsushi Suda (JP)
Atsushi Suda (JP)
Download PDF:
Claims:
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