| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a multi-point simultaneous measurement method for electric power station that takes measurements at accurate time even in a place of an electric power station where a GPS radio wave cannot be received, and easily secures simultaneity with high precision even while a plurality of measurement points are connected by cables, etc., a multi-point simultaneous measurement system, and an internal clock used therefor. <P>SOLUTION: Each measuring instrument 12 includes an internal clock 21 with time correction means 21b, and measurement means 22. The time correction means 21b corrects the internal clock 21 by adding a difference between the number of actually counted pulses of an oscillator 21a in a certain time and the product of the oscillation frequency of the oscillator 21a and the certain time to the time in every constant time. A master machine 11 transmits measurement time to each measuring instrument 12 by radio. Each measuring instrument 12 takes a measurement by the measurement means 22 when the internal clock 21 reaches the measurement time, and transmits measurement data to the master machine 11 by radio. <P>COPYRIGHT: (C)2013,JPO&INPIT |
