Method for monitoring steel bar corrosion state in concrete by stages and sensor

A steel corrosion and concrete technology, applied in transmittance measurement, phase influence characteristic measurement, optical test flaws/defects, etc., can solve the problem that the corrosion state of steel bars cannot be truly reflected, so as to overcome the influence of unstable light source and prolong the effective working time. , the effect of ensuring reliability and durability

Inactive Publication Date: 2011-06-15
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the sensor can only realize single-point monitoring, with its accidental nature, it cannot truly reflect the corrosion state of steel bars

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
  • Method for monitoring steel bar corrosion state in concrete by stages and sensor
  • Method for monitoring steel bar corrosion state in concrete by stages and sensor
  • Method for monitoring steel bar corrosion state in concrete by stages and sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] Depend on figure 1 It can be seen that the concrete composition of the long-period fiber grating steel bar corrosion sensor system of the present invention is that broadband light source 1 (can adopt LG150 type broadband light source), enters Y-type fiber coupler 2 (such as figure 2 shown) to the input end of the Y-type fiber coupler 2, and then through the coupler joint 3, through the sensing fiber 4 to the terminal reflective long-period fiber grating steel bar corrosion sensor probe 5, and the environment to be measured in Cl - The content interaction produces the coupling effect between the core and the cladding, and after passing through the reflective metal film on the end face of the core in the probe 5, the reflected light is formed and enters the spectrometer 7 through the reflective end of the Y-shaped fiber coupler 2 (AQ6317 spectrometer can be used ), and then processed by the computer 8 to output the relationship curve between the reflected light intensi...

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 relates to a method for monitoring steel bar corrosion state in concrete by stages and a sensor, belonging to the field of civil engineering sensor testing. The method comprises two stages for monitoring the steel bar corrosion state, namely a steel bar initial corrosion stage for monitoring Cl<-> content and a stage for monitoring the content of liquid rust nearby the steelbar during rusting; therefore, the method prolongs the effective working time of a steel bar corrosion sensor. The sensor comprises a sleeve, a fiber bracket and an long period fiber grating (LPFG) sensing probe, wherein the sleeve is provided with a hole; the fiber bracket is arranged in the sleeve; the long period fiber grating (LPFG) sensing probe is freely and straightly arranged on the fiber bracket; and monitoring medium is filled in the sleeve.

Description

technical field [0001] The invention relates to a stage-by-stage monitoring method and a sensor for the corrosion state of steel bars in concrete, belonging to the field of civil engineering sensor testing. Background technique [0002] Long-period fiber grating (hereinafter referred to as LPG) is a sensing grating based on the coupling theory of core guided mode and cladding mode. concentration. The biological and chemical sensing technology based on this coupling theory has been widely used in many biochemical research fields such as the measurement of antigen content in blood, the identification of protein substances, drug screening, the detection of solution concentration, and the determination of the degree of degradation of sewage. [0003] With the wide application of reinforced concrete structures in large-scale construction projects, the corrosion of steel bars in concrete has become the most important disaster that threatens the durability of reinforced concrete s...

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): G01N21/88G01N21/59G01N21/41
Inventor 曾捷刘宏月梁大开王晓洁胡兴柳
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap