1/4 wave plate phase delay automatic testing device and method for all-fiber current transformer
An automatic test device and current transformer technology, applied in the direction of measuring devices, instruments, measuring electrical variables, etc., can solve problems such as the inability to establish an accurate temperature model for sensing optical fibers, achieve good optical path reciprocity, and avoid traditional manual data collection way, the effect of improving test efficiency
Active Publication Date: 2021-04-09
ELECTRIC POWER RES INST OF EAST INNER MONGOLIA ELECTRIC POWER +3
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Problems solved by technology
[0005] In order to solve the problem that there is no practical method for testing the phase delay of the optical fiber 1 / 4 wave plate at present, and it is impossible to establish an accurate temperature model for mutual compensation with the sensing optical fiber Verdet coefficient, the present invention proposes a 1 / 4 4 wave plate phase delay automatic test device, which can automatically test the phase delay of 1 / 4 wave plate
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[0041] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
[0042] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.
[0043] Explanation of terms:
[0044] MZI: Mach-Zehnder interferometer, Mach-Zehnder interference.
[0045] Ve...
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The invention discloses a 1 / 4 wave plate phase delay automatic testing device and method for an all-fiber current transformer. Wherein, the device includes: a wide-spectrum light source, which is connected to the first coupler; an output pigtail of the first coupler is fused with an input pigtail of the second coupler through a Mach-Zehnder interference reference phase arm; The other output pigtail of the first coupler is fused with one end of the 1 / 4 wave plate to be tested at 45° to the axis, and the other end of the 1 / 4 wave plate to be tested is connected to the other input pigtail of the second coupler Welding at 45° to the axis; the 1 / 4 wave plate to be tested and the melting point connected to it are placed in a space where the temperature can be adjusted and can be kept stable; the two beams of light output by the first coupler pass through different phases After the delay, it enters the second coupler and interferes in the second coupler; the interfered light is output to the corresponding detector through the two output pigtails of the second coupler, and the detector is sent to the processor to solve Displays the phase delay of the 1 / 4 wave plate at the current temperature.
Description
technical field [0001] The invention belongs to the field of optical fiber current transformers, in particular to a 1 / 4 wave plate phase delay automatic testing device and method for all optical fiber current transformers. Background technique [0002] The transformer is an important device for monitoring the operation status of the power grid. The measurement, monitoring and protection control in the substation rely on it to obtain the current, voltage and other information required for measurement, measurement and protection. Traditional electromagnetic transformers have problems such as weak electrical insulation, bulky volume, small dynamic range, and ferroresonant overvoltage to maintain certain accuracy and linearity in a wide range. With the continuous development and advancement of digital substation smart grids, all-fiber current transformers are increasingly favored by smart grid construction due to their unique advantages that are different from traditional electr...
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IPC IPC(8): G01R35/02
CPCG01R35/02
Inventor 袁志军靳俊杰林海丹钱文晓肖冰秘立鹏敖明孙友群司磊王利清
Owner ELECTRIC POWER RES INST OF EAST INNER MONGOLIA ELECTRIC POWER