| 摘要 |
PURPOSE:To measure the oscillation of a high electric potential part stably by transmitting a signal and supplying the electric power by using optical fibers. CONSTITUTION:Light is sent to the optical fiber 51 from a light source 8 continuously and converted into the electric power by a solar cell 9 and further, stabilized by a voltage regulator 10 to supply the DC electric power to an amplifier 2 or the like. Then, when the high electric potential part where an oscillation sensor 1 is fitted oscillates, an electrical signal of the voltage in proportion to its oscillation level is generated on the oscillation sensor 1. This electrical signal is adjusted to the prescribed voltage with the amplifier 2, A/D converted with an A/D converter 3, E/O converted with an electro/optic converter 4 and transmitted to a photo/electric converter 6 by the optical fiber 5. This is converted inversely with the photo/electric converter 6 and a D/A converter 7 to detect the oscillation of the high electric potential.
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