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Fiber bragg grating pressure sensor with temperature self-compensation capability

A pressure sensor and fiber grating technology, which is applied in the field of transformer monitoring, can solve problems such as the inability to respond to pressure changes in real time, and the inability of pressure sensors to be directly installed for pressure measurement, so as to avoid the discharge phenomenon.

Active Publication Date: 2020-09-01
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

[0003] The purpose of the present invention is to provide a fiber grating pressure sensor with temperature self-compensation capability to solve the problem

Method used

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  • Fiber bragg grating pressure sensor with temperature self-compensation capability
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  • Fiber bragg grating pressure sensor with temperature self-compensation capability

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Embodiment Construction

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0029] The purpose of the present invention is to provide a fiber grating pressure sensor with temperature self-compensation capability, which can sense the change of oil pressure inside the transformer in real time, avoid the discharge phenomenon inside the transformer, and realize the internal pressure without changing the environment of the transformer. Measure accurately.

[0030] In order to make the above objects, features and advantages of the present i...

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Abstract

The invention relates to a fiber bragg grating pressure sensor with a temperature self-compensation capability. The sensor comprises a sensor mounting device, an optical fiber with the temperature self-compensation capability and a sensor packaging device. The sensor packaging device comprises a pressure sensitive element, a supporting frame, a tail fixing end and a sensor shell. The sensor mounting device comprises a head thread and a skirt edge arranged behind the head thread. According to the invention, the pressure sensitive element is arranged outside the fiber bragg grating pressure sensor, the pressure sensitive element is directly contacted with an oil surface, and the change of the oil pressure in the transformer is sensed in real time, so that the discharge phenomenon in the transformer is avoided, and the accurate measurement of the internal pressure is realized on the premise of not changing the transformer environment.

Description

technical field [0001] The invention relates to the field of transformer monitoring, in particular to an optical fiber grating pressure sensor with temperature self-compensation capability. Background technique [0002] After a long period of development, the research on optical fiber pressure sensors has been relatively mature, and the pressure monitoring methods in various industries have also been updated. But there is no fiber grating pressure sensor specially used for power transformers. Although a large number of pressure protection measures have been used in oil-immersed transformers to realize pressure monitoring, for example: traditional pressure protection devices include explosion-proof tubes, pressure relief valves, pressure mutation relays, etc., but this type of structure focuses on the protection of the transformer environment , which will act when the internal pressure increases to a certain threshold to release the pressure inside the transformer. Therefor...

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Application Information

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IPC IPC(8): G01L11/02G01R31/62
CPCG01L11/025G01R31/62
Inventor 齐波冀茂黄猛侯喆郑伟温钊李成榕
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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