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Among the detection methods of partial discharge in high voltage electrical equipment, optical method is new and competitive. This paper presents a diaphragm type optical fiber EFPI (External Fabry-Perot Interfering) sensor, which is developed by external Fabry-Perot interfering method and used for detection of partial discharge. We made a needle-plane electrode in oil, detected it with joint detection...
Thermally stabilized polyacrylonitrile (PAN) fibers were produced by multi-stage thermal stabilization between 190 and 270 °C. X-ray diffraction (XRD) and Fourier Transform infrared (FT-IR) spectroscopy were used to investigate the structure of PAN fibers and the stabilized fibers. A new diffraction peak appears at 2θ = 23.2° in XRD pattern of the stabilized fibers besides the peaks in that of PAN...
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