| 摘要 |
A system for logging a data of power line and a method thereof are provided to reduce the capacitance burden of a memory by remarkably reducing electric power related data which are accumulated at a memory. A data logging system of an electric wire path includes a data logging device(100). The data logging device includes an A/D(Analog to Digital) converter(120), a discrete Fourier transform unit(140), a first buffer(150), a second buffer(160), a spectrum comparison unit(170), and a storage(180). The discrete Fourier transform unit performs discrete Fourier transform of electric power wave data, and creates electric power wave spectrum elements for each frequency. The storage stores the extracted electric power wave spectrum elements as data.
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