Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Composite insulator and method for detecting brittle fracture of composite insulator based on fiber Bragg grating

A technology of composite insulators and optical fiber gratings, which is applied in the direction of insulators, the measurement of the change force of the optical properties of the material when it is stressed, and the measurement of force, can solve the problem of not being able to find the brittle fracture of composite insulators, and monitoring the operating status of composite insulators. To achieve the effect of good insulation, intuitive identification and positioning, and improved reliability

Active Publication Date: 2022-02-15
SOUTH CHINA UNIV OF TECH
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this ultrasonic testing method cannot efficiently, accurately, and intuitively detect the brittle fracture of composite insulators, let alone monitor the operating status of composite insulators online 24 / 7

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
  • Composite insulator and method for detecting brittle fracture of composite insulator based on fiber Bragg grating
  • Composite insulator and method for detecting brittle fracture of composite insulator based on fiber Bragg grating
  • Composite insulator and method for detecting brittle fracture of composite insulator based on fiber Bragg grating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0028] The composite insulator provided in this embodiment includes a mandrel 2, high-voltage end fittings 11 and low-voltage end fittings 12 respectively arranged at both ends of the mandrel 2, a sheath 3 coated on the mandrel 2, and a The umbrella skirt, in this embodiment, the sheath 3 is a silicone rubber sheath, and the umbrella skirt includes a large umbrella 31 and a small umbrella 32 .

[0029] In order to effectively monitor the three-dimensional axial stress change and physical state of the core rod 2 surface during the brittle fracture of the composite insulator, at least two optical fibers 4 are arranged between the core rod 2 and the sheath 3 of the composite insulator, and each optical fiber 4 A plurality of fiber Bragg gratings 5 ​​for obtaining wavelength offsets to judge brittleness are arranged along the length direction. Specifically, in this embodiment, three optical fibers 4 are provided, which are respectively defined as 1# optical fibers 41, 2 #optical f...

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

PropertyMeasurementUnit
depthaaaaaaaaaa
perimeteraaaaaaaaaa
depthaaaaaaaaaa
Login to View More

Abstract

The invention provides a composite insulator, including a core rod, a metal fitting, a sheath and an shed, and also includes at least two optical fibers located between the core rod and the sheath, and at least two of the optical fibers are fixed on the core rod On the surface, each of the optical fibers includes a grating coverage area and a pigtail, and in the grating coverage area of ​​each of the optical fibers, a plurality of devices for obtaining the wavelength offset to judge the brittle fracture are arranged along the length direction of the optical fiber. Fiber Bragg Grating. It also provides a method for detecting the brittle fracture of the composite insulator based on the fiber Bragg grating, including obtaining the wavelength shift of the fiber Bragg grating; judging the composite insulator according to the measured wavelength shift of the fiber Bragg grating arranged at different positions on the surface of the mandrel. The brittle fracture location and brittle fracture degree. The invention uses the wavelength offset value as an early warning to monitor the brittle fracture process of the composite insulator, can monitor the brittle fracture process of the composite insulator efficiently, accurately and intuitively in real time, and can replace the traditional inspection of the composite insulator.

Description

technical field [0001] The invention relates to the technical field of on-line monitoring of power transmission and transformation insulation equipment, in particular to a composite insulator and a method for detecting brittle fracture of the composite insulator based on an optical fiber grating. Background technique [0002] Composite insulators are responsible for insulation performance and mechanical support performance in transmission lines. Its brittle fracture (referred to as brittle fracture) accident is very harmful to the power system. The load is much lower than the normal fracture load, and the fracture time is unpredictable, which often leads to disconnection. Even cause major accidents such as falling towers. The traditional composite insulator detection technology mainly detects the operation status of transmission line insulators through regular inspections by inspectors, on-site observation and detection methods. The existing composite insulator detection met...

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 Patents(China)
IPC IPC(8): H01B17/00H01B17/38G01B11/16G01K11/3206G01L1/24
CPCH01B17/00H01B17/38G01B11/165G01L1/246G01L1/247G01K11/3206
Inventor 郝艳捧曹航宇韦杰潘锐健黄磊毕继凯阳林
Owner SOUTH CHINA UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com