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

Piezoelectric fiber intelligent gasket for bolt looseness monitoring and manufacturing and application method

A piezoelectric fiber and bolt loosening technology, applied in the manufacture/assembly of piezoelectric/electrostrictive devices, the measurement of the properties and forces of piezoelectric devices, piezoelectric/electrostrictive/magnetostrictive devices, etc., to achieve It is beneficial to result analysis, improves the accuracy of monitoring and recognition, and improves the effect of detection signal amplitude

Pending Publication Date: 2022-05-06
HUNAN UNIV OF SCI & TECH
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention patent of application publication number CN109632157A discloses a kind of PVDF piezoelectric film used in the dynamic stress device of the bolt joint surface is not suitable for the environment with harsh working temperature

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
  • Piezoelectric fiber intelligent gasket for bolt looseness monitoring and manufacturing and application method
  • Piezoelectric fiber intelligent gasket for bolt looseness monitoring and manufacturing and application method
  • Piezoelectric fiber intelligent gasket for bolt looseness monitoring and manufacturing and application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] like figure 1 , as shown in 2 and 3, a piezoelectric fiber intelligent gasket for bolt loosening monitoring and its production and application method, characterized in that the intelligent gasket includes gaskets 1, 3 and a piezoelectric fiber sensor 2, and the intelligent gasket The gasket is composed of a "stepped" upper gasket 1 and a "stepped" lower gasket 3, and a U-shaped groove 10 is formed in the circumferential direction. The piezoelectric fiber sensor 2 is an annular structure and is arranged on the upper and lower gaskets. The U-shaped groove 10 formed by the sheets 1 and 3 is composed of a sensitive element and epoxy resin 8 .

[0035] like Figure 4 The shown sensitive element includes a plurality of piezoelectric fiber rods 5, an inner electrode 6, an outer electrode and a connection terminal 4 arranged radially and in an annular array around the center; one end of the piezoelectric fiber rod 5 is connected to the inner electrode 6, and the other end is c...

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 piezoelectric fiber intelligent gasket for bolt looseness monitoring and a manufacturing and application method thereof. The intelligent gasket comprises a gasket body and a piezoelectric fiber sensor, the gasket body is formed by meshing a stepped upper gasket body and a stepped lower gasket body, a U-shaped groove is formed in the circumferential direction, and the piezoelectric fiber sensor is of an annular structure, is arranged at the position of the U-shaped groove formed by the upper gasket body and the lower gasket body and is composed of a sensitive element and epoxy resin. According to the intelligent gasket, the piezoelectric fiber sensor is used for sensing the pre-tightening force of the bolt, monitoring the change fluctuation of an output signal and judging the loosening or failure condition of the bolt, so that the bolt connection state is monitored in real time; the sensing element of the intelligent gasket is formed by connecting a plurality of piezoelectric fibers in an annular array in parallel, can uniformly sense the change of pretightening force acting on the gasket, is high in sensitivity, is suitable for various bolt connecting pieces, can bear a certain impact load, can be used for monitoring the bolt state under the severe working condition, and is suitable for popularization and application. The large labor intensity of a traditional manual detection method is effectively avoided, the monitoring efficiency is improved, and the application market is wide.

Description

technical field [0001] The invention belongs to the technical field of bolt connection state monitoring, and provides a piezoelectric fiber intelligent gasket for bolt loosening monitoring, which is used for real-time monitoring of the bolt connection state. Background technique [0002] As a connection method for connecting detachable parts and transmitting loads, bolted connections are widely used in various industries such as machinery, transportation, electric power, and civil engineering. The connection state directly affects whether the entire structure or equipment can work normally, which is related to the overall reliability. sex and safety. In the long-term work or under the environment of cyclic load shock and forced vibration, the bolts often loosen or fail, resulting in a decrease in the life of the equipment, and even serious safety accidents and major property losses. For bolts working in harsh environments and complex working conditions, its tightness and fa...

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): H01L41/113H01L41/053H01L41/23H01L41/25G01L5/24G01L1/16G01D5/14F16B43/00H10N30/30H10N30/02H10N30/03H10N30/88
CPCF16B43/00G01L1/16G01D5/14G01L5/243H10N30/883H10N30/302H10N30/03H10N30/02
Inventor 沈意平蒋帅王送来刘翊阳雪兵傅志强宾光富
Owner HUNAN UNIV OF SCI & 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