Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Using radiant energy
Patent
1991-04-05
1992-07-28
Nguyen, Vinh
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Using radiant energy
324117R, 324158R, 324158D, 324244, G01R 3100
Patent
active
051343622
ABSTRACT:
At both ends parts of a specified section of a high tension line and close to it, a first Faraday device and a second Faraday device are disposed, and an output end of the first Faraday device is connected to the input end of the second Faraday device through a polarization plane retaining type optical fiber. A light having a linear-polarized polarization plane is inputted from a polarizer to the input end of the first Faraday device. The light output from the second Faraday device is led through an analyzer to a photoelectric device, whose output is processed by an electric circuit consisting of only one band-pass filter, only one DC filter, only one divider, and a judgment circuit.
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patent: 4916387 (1990-04-01), Miller
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patent: 4973899 (1990-11-01), Jones et al.
IEEE Journal of Quantum Electronics, vol. QE-18, No. 10, Oct. 1982, pp. 1619-1623, K. Kyuma et al., "Fiber Optic Measuring System for Electric Current by Using a Magnetooptic Sensor".
IEEE Transactions on Power Delivery, vol. PWRD-2, No. 1, Jan. 1987, pp. 87-93, T. Mitsui et al., "Development of Fiber-Optic Voltage Sensors and Magnetic-Field Sensors".
Mitsubishi Denki & Kabushiki Kaisha
Nguyen Vinh
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