TIME SYNCHRONIZATION METHOD AND MEASURING SYSTEM USING THE SAME

PROBLEM TO BE SOLVED: To provide a time synchronization method capable of relatively synchronizing a local time between individual sensors without being affected by delay even if the line speed is low.SOLUTION: The time synchronization method is a time synchronization method in a measuring system which includes: a first measuring device provided with a CPU, storage means, a first sensor, and a first clock; and a second measuring device provided with a CPU, storage means, a second sensor, and a second clock, the first and second measuring devices being connected via a network, and includes the step S1 of identifying the waveform showing time transition of the physical quantity in each sensor, respectively from the measured value of the first sensor and the measured value of the second sensor; the step S2 of comparing the feature part of each identified waveform and calculating a local time lag of the second clock for the local time of the first clock; and the step 3 of subtracting the calculated local time lag from the local time of the second clock and synchronizing the local time of the second clock with the local time of the first clock.