Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Local discharging sensor combining graphene diaphragm with micro optical fiber interference cavity and detection method based thereon

A technology of partial discharge detection and graphene film, which is applied in the direction of testing dielectric strength, can solve the problems of being easily affected by temperature and low detection sensitivity, achieving strong anti-electromagnetic interference ability, optimizing structural parameters, and ensuring long-term reliability Effect

Active Publication Date: 2019-05-24
CHONGQING UNIV
View PDF6 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Local discharging sensor combining graphene diaphragm with micro optical fiber interference cavity and detection method based thereon
  • Local discharging sensor combining graphene diaphragm with micro optical fiber interference cavity and detection method based thereon
  • Local discharging sensor combining graphene diaphragm with micro optical fiber interference cavity and detection method based thereon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[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 involved in 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 ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a local discharging sensor combining a graphene diaphragm with a micro optical fiber interference cavity and a detection method based thereon. The local discharging sensor comprises a tunable laser device (1), a laser device wavelength control module (2), an optical fiber circulator (3), monomode optical fiber (4), the micro optical fiber interference cavity (5), a photoelectric detector (6), a signal line (7), a filter (8) and a data collection card (9). A multilayer graphene membrane is adopted, so that detection sensitivity of the sensor is improved; on the basis ofstructure optimization design of the multilayer graphene membrane, the multilayer graphene membrane is enabled to adapt to local discharging detection frequency band requirements; a polyimide coatingis adopted to prolong service life of the multilayer graphene membrane; femtosecond laser is adopted to process the micro optical fiber interference cavity inside optical fiber, and a static-state working point is stabilized on the basis of laser device wavelength control. On the basis of optimization design of a detection device mounting mode, original working environment of electrical equipmentis unaffected during mounting of the local discharging sensor.

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...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products