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Optical fiber current sensing measurement system based on optical fiber magneto-optical effect

A fiber optic current sensing and magneto-optical effect technology, applied in measurement devices, measurement of electrical variables, measurement of time integration, etc., can solve the problems of output signal fluctuation and low sensitivity of the sensing system, and achieve elimination of linear birefringence and high current. Sensitivity, the effect of improving stability

Inactive Publication Date: 2009-04-08
董小鹏 +1
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Problems solved by technology

[0008] The present invention provides an optical fiber current sensing measurement system based on the optical fiber magneto-optical effect, which overcomes the shortcomings of low sensitivity and fluctuations in the output signal of the sensing system in the photoelectric current sensor based on the Faraday effect in the background technology

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  • Optical fiber current sensing measurement system based on optical fiber magneto-optical effect
  • Optical fiber current sensing measurement system based on optical fiber magneto-optical effect
  • Optical fiber current sensing measurement system based on optical fiber magneto-optical effect

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Embodiment Construction

[0023] like figure 2 As shown, the optical fiber current sensing measurement system based on the optical fiber magneto-optic effect includes a light source 1, a first transmission optical fiber 2, an optical fiber sensing head 3, a second transmission optical fiber 4, and a photoelectric conversion and signal processing unit 5.

[0024] The light source 1 of the sensing system adopts an amplified spontaneous emission (ASE) light source made by pumping an erbium-doped optical fiber with a semiconductor laser. Since the output light of this light source has the characteristics of no polarization effect and broadband high power, the light output by the polarization beam splitter has the advantages of high power and light intensity not affected by the ambient temperature and the state change of the transmission fiber lead, which can effectively eliminate The influence of the status change of the optical fiber lead wire on the output signal of the sensing system.

[0025] The op...

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Abstract

The invention discloses an optical fiber current sensing measurement system based on optical fiber magneto-optical effect, comprising a light source, a first transmission optical fiber, an optical fiber sensor head, a second transmission optical fiber and a photoelectric conversion and signal processing unit; the optical fiber sensor head comprises a polarization beam splitter, a Faraday rotator and an annealing optical fiber ring with a holophote; the light source transmits the light to the optical fiber sensor head by the first transmission optical fiber; wherein, the annealing optical fiber ring anneals under high temperature so as to eliminate dual-refraction in the optical fiber and improve the stability of the sensor head under the change of environmental temperature. The photoelectric conversion and signal processing unit is connected with the sensor head by the second transmission optical fiber.

Description

technical field [0001] The invention relates to a photoelectric transformer applied in the electric power sector, in particular to an optical fiber current sensing and measuring system based on the optical fiber magneto-optic effect (Faraday effect). Background technique [0002] Compared with the traditional electromagnetic current transformer, the photoelectric current sensor based on the Faraday effect has obvious advantages, so it has been widely valued and studied extensively in the world. like figure 1 As shown, the basic composition of the polarization detection current sensing system based on the Faraday effect includes sequentially arranged light source 1, transmission fiber 2, polarizer 3, sensing fiber or magneto-optical material 4, current wire 5, polarizer 6, Transmission optical fiber 7, photoelectric conversion and signal processing circuit 8. [0003] According to the basic principle of the Faraday effect, if there is a magnetic field along the transmission...

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Application Information

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IPC IPC(8): G01R11/24G02F1/095
Inventor 董小鹏
Owner 董小鹏
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