Novel optical fibre current sensor system

A fiber-optic current and sensor technology, applied in the direction of voltage/current isolation, measuring current/voltage, instruments, etc., can solve the problems of poor frequency response, low detection accuracy, and small phase change of current sensors, and achieve large dynamic range and detection High sensitivity and immunity to electromagnetic interference

Inactive Publication Date: 2010-03-17
SHANGHAI BOOM FIBER SENSING TECH
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  • Description
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Problems solved by technology

[0006] However, the existing current sensors using the above principles have poor frequency response, serious electromagnetic interference, and small phase changes, so the detection accuracy is not high

Method used

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  • Novel optical fibre current sensor system
  • Novel optical fibre current sensor system

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Embodiment Construction

[0024] The present invention will be described in detail below through specific examples.

[0025] An optical fiber current sensor system, the system includes a control unit 3 and a sensing head connected to the control unit through a sensing optical cable, the sensing head is wound around the sensing optical cable 1 of the cable 2, and the sensing optical cable 1 is encapsulated with Sensing optical fiber 11 and reference optical fiber 12, described sensing optical fiber 11 is coated with magnetostrictive material, and described control unit 3 comprises

[0026] A laser 31 is used to generate a light source; a fiber coupler 32 connected to the laser is used to divide the light source from one optical fiber into multiple optical fibers; The light in the sensing fiber and the reference fiber is reflected to the coupler and interferes; a photoelectric converter 33 connected to the fiber coupler is used to convert light intensity changes into voltage changes;

[0027] A data pro...

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Abstract

The invention provides a novel optical fibre current sensor system, comprising a control unit and a sensing head connected with the control unit through a sensing optical cable. The sensing head comprises an electric cable and a sensing optical cable winding the electric cable; a sensing optical fibre and a reference optical fibre are encapsulated in the sensing optical cable; magnetostrictive materials are coated on the sensing optical fibre; the control unit comprises a laser, an optical fibre coupler connected with the laser, a reflector connected with the optical fibre coupler through thesensing optical cable, a photoelectric converter connected with the optical fibre coupler, a data processor connected with the photoelectric converter and a signal collector connected with the data processor and used for collecting output signals of the data processor and transmitting the signals to a computer for analysis and processing. The system adopts the optical fibre as the sensing medium and has the characteristics of high sensitivity, small volume, anti-electromagnetic interference, high-voltage resistance, favorable safety, and the like when compared with the traditional current sensor.

Description

technical field [0001] The invention belongs to an optical fiber sensor technology, in particular to an optical fiber current sensor system and a sensing method thereof. Background technique [0002] Today, as human beings step into the information society, people's requirements for information extraction, processing, transmission and synthesis are becoming more and more urgent. As a functional device for information extraction, sensors are more and more closely related to human beings. Sensor technology is an important part of modern information technology, and it is also one of the core technologies representing the country's scientific and technological competitiveness. [0003] The electric power industry is the basic industry of national economic construction and plays a decisive role in national economic construction. In recent years, with the rapid development of my country's economy, the demand for electricity is increasing day by day, the rated voltage level and r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00G01R15/24G02B6/42
Inventor 齐龙舟刘亮皋魏席刚周正仙仝芳轩
Owner SHANGHAI BOOM FIBER SENSING TECH
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