| 摘要 |
[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). |
