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Intellectual structure health monitoring system based on DSP technology

A technology of health monitoring system and intelligent structure, which is applied in the direction of optical testing for flaws/defects, etc., can solve the problem of low catalyst use efficiency, and achieve the effect of structural integration, strong practicability, and low cost

Inactive Publication Date: 2011-05-11
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the use efficiency of the catalyst is very low, and a large catalyst concentration also has a certain influence on the performance of the smart composite material

Method used

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  • Intellectual structure health monitoring system based on DSP technology
  • Intellectual structure health monitoring system based on DSP technology
  • Intellectual structure health monitoring system based on DSP technology

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0040] Example 1: figure 1 A schematic embodiment of an intelligent structure self-healing method and a health monitoring system of the present invention is given. Such as figure 1 As shown: the present invention includes: a light source (1), an optical fiber sensing network module (2), a repairing reinforcement fiber (3), a signal transmission and processing module (4) and a damage location module (5).

[0041] Among them, the repairing reinforcing fiber (3) includes: fiber coating (301) and photocuring repairing agent (302); the signal transmission and processing module (4) includes: photoelectric conversion and amplification (401), analog-to-digital conversion (402), signal Processing (403) and data communication (404).

Embodiment 2

[0042] Example 2: figure 2 , 3, 6, 7 give an example of self-healing of a schematic smart structure of the present invention.

[0043] In the embodiment, the epoxy acrylate prepolymer (the Viscosity: 6800mPa s (25°C)), as the base material of photocuring repair agent ( figure 2 Figure of the experimental setup prepared for the prepolymer); with photoinitiator 1173 (2-hydroxy-2-methyl-1-phenylacetone) and TPO (two 2,4,6-trimethylbenzoyl diphenyl base phosphine oxide) according to the mass ratio of 1:1 preparation composite photoinitiation system ( image 3 is the absorption spectrum of the composite photoinitiator, the abscissa is the wavelength, and the ordinate is the absorbance); with prepolymer (epoxy acrylate), reactive diluent (methyl methacrylate) and photoinitiator (prepared by 1173 and TPO Composite photoinitiator) according to the mass percentage of 15:4:1 preparation photocuring restoration agent, the prepared photocuring restoration agent has a viscosity of 598...

Embodiment 3

[0045] Example 3: Figure 4 , 5 gives an embodiment of a specific intelligent structure sensing, signal transmission and processing module of the present invention.

[0046] In the example, Figure 4 It is an optical fiber sensor network module adhered to the surface of an intelligent composite structure according to an orthogonal distribution (in the figure: X 1 ~X 8 Respectively represent 8 sensing fibers distributed orthogonally, the sensing network includes 16 sensing areas), used to sense and transmit the deformation and damage information of the structure;

[0047] Figure 5 The signal transmission and processing module (4) includes: photoelectric conversion and amplification (401), analog-to-digital conversion (402), signal processing (403) and data communication (404). Photoelectric conversion and amplification (401) uses a phototransistor L-31ROPT1D2 (Q1) without a base lead, an adjustable resistor (R1=28KΩ) and a current limiting resistor (R2=20kΩ) to perform pho...

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Abstract

The invention discloses an intellectual structure self-healing method and health monitoring system. The intellectual structure self-healing method is a brand new intellectual structure self-healing and self-diagnostic method which realizes damage self-healing of a composite material by adopting sun light energy and a light curing technology and also realizes health monitoring on the basis of a neural network and a digital signal processing technology. In the invention, a light curing binding agent is used as a light curing remediator which is placed hollow fiber coated with a photomask agent and a coupling agent, when the material has cracks, fiber in front extension edges of the cracks fractures, the photocuring restoration agent permeates in the damaged cracks, and thus the damage self-healing of the material is realized by adopting the sun light as supply energy; meanwhile, an optical fiber sensor is used as a signal transmitting and sensing element, the health state of an intellectual structure is monitored by combining the digital signal processing technology. The invention has the characteristics of strong practicability, low cost, environment protection, energy saving and the like and provides an effective solution scheme for realizing the self-healing and health monitoring of a member made of composite material.

Description

[0001] This application is a divisional application. The filing date of the original application is: May 8, 2009; the application number is: 200910031317.0; the name of the invention is: intelligent structure self-healing method and health monitoring system based on light repair technology. technical field [0002] A new type of intelligent structure self-healing method and health monitoring system based on photoremediation technology described in the present invention, combined with photocuring technology, optical fiber sensing technology, composite material structural mechanics and digital signal processing technologies, utilizes sunlight energy The self-healing of composite materials is realized, and the health monitoring of composite material structures is realized by combining neural network and digital signal processing technology, which belongs to a new intelligent structure self-repair and self-diagnosis. In particular, the material self-healing solution proposed by the...

Claims

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Application Information

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IPC IPC(8): B29C73/22G01N21/88
Inventor 赵志敏李鹏俞晓磊洪小芹陈玉明
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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