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A partial discharge sensor combining a graphene membrane and a micro-fiber interference cavity and a detection method based on it

A partial discharge detection, graphene film technology, applied in the direction of testing dielectric strength, etc., can solve the problems of low detection sensitivity, easy to be affected by temperature, etc., and achieve the effect of optimizing structural parameters, strong anti-electromagnetic interference ability, and small size

Active Publication Date: 2021-12-28
CHONGQING UNIV
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Problems solved by technology

[0006] The purpose of the present invention is to provide a partial discharge sensor combined with a graphene diaphragm and a micro-fiber interference cavity and a detection method based on it, aiming to solve the low detection sensitivity and susceptibility of the current fiber-optic Perth type partial discharge sensor. Disadvantages of temperature effects

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  • A partial discharge sensor combining a graphene membrane and a micro-fiber interference cavity and a detection method based on it
  • A partial discharge sensor combining a graphene membrane and a micro-fiber interference cavity and a detection method based on it
  • A partial discharge sensor combining a graphene membrane and a micro-fiber interference cavity and a detection method based on it

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[0023] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0024] as attached figure 1 Shown is a schematic structural diagram of a partial discharge sensor combining a graphene diaphragm and a microfiber interference cavity according to the present invention, which includes: a tunable laser 1, a laser wavelength control module 2, an optical fiber circulator 3, a single-mode optical fiber 4, a micro Optical fiber interference cavity 5, photodetector 6, signal line 7, filter 8, data acquisition card 9; the laser light emitted by the tunable laser 1 passes through the optical fiber circulator 3 and is transmitted by the single-mode optical fiber 4 to the The micro-fiber interference...

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Abstract

A partial discharge sensor combined with a graphene diaphragm and a micro-fiber interference cavity and a detection method based on it, the sensor includes: a tunable laser (1), a laser wavelength control module (2), an optical fiber circulator (3), a single Mode optical fiber (4), micro-fiber interference cavity (5), photoelectric detector (6), signal line (7), filter (8), data acquisition card (9). The present invention adopts the multi-layer graphene diaphragm, improves the detection sensitivity of the sensor; Based on the optimal design of the structure of the multi-layer graphene diaphragm, it adapts to the requirements of the partial discharge detection frequency band; adopts polyimide coating to improve multi-layer The service life of the one-layer graphene diaphragm; the femtosecond laser is used to process the micro-fiber interference cavity inside the fiber, and based on the laser wavelength control, the static working point is stabilized. Based on the optimized design of the installation method of the detection device, the original working environment of the electrical equipment is not affected while the device is installed.

Description

technical field [0001] The invention belongs to the technical field of on-line monitoring of electrical equipment, and in particular relates to a partial discharge sensor and a partial discharge detection method combining a graphene diaphragm and a micro-fiber interference cavity. Background technique [0002] Partial discharge is a discharge phenomenon caused by the breakdown of a local area in an insulating medium. Partial discharge detection is an effective method for evaluating the insulation state of electrical equipment. When partial discharge occurs in the medium, electric pulses, electromagnetic waves, ultrasonic waves, light, local overheating and some new chemical products will be generated. By detecting the ultrasonic signal generated by partial discharge, the existence of partial discharge can be determined and the discharge point can be located. Compared with the traditional piezoelectric sensor, the partial discharge sensor based on optical fiber sensing has t...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/12
Inventor 陈伟根杜林张知先万福雷嘉丽李剑谭亚雄王有元黄正勇王飞鹏周湶
Owner CHONGQING UNIV
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