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Smart cellular composites based on ultra-low reflectivity FBG array sensors

An array sensor and composite material technology, applied in the field of aerospace honeycomb composite materials, can solve the problems of electrical sensors being susceptible to electromagnetic interference, limited signal processing in time, and difficulties in distributed measurement, achieving important social value, low loss, The effect of great economic value

Active Publication Date: 2021-07-27
WUHAN UNIV OF TECH
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Problems solved by technology

[0003] At present, there are few literatures on the monitoring of composite materials. The existing monitoring methods mainly use electrical sensors for monitoring. Since the electrical sensors themselves are susceptible to electromagnetic interference, do not have explosion-proof functions and are difficult to work in harsh environments, distributed Difficult to measure, limiting timely processing of signals

Method used

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  • Smart cellular composites based on ultra-low reflectivity FBG array sensors
  • Smart cellular composites based on ultra-low reflectivity FBG array sensors
  • Smart cellular composites based on ultra-low reflectivity FBG array sensors

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Embodiment Construction

[0023] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0024] The invention provides a smart honeycomb composite material based on an ultra-low reflectivity FBG array sensor, such as figure 1 As shown, it mainly includes an optical fiber honeycomb composite material component 1 , an optical cable 2 , a data processing unit 3 , a spectrum analyzer 4 , and a computer 5 connected in sequence.

[0025] Such as figure 2 As shown, the optical fiber honeycomb composite material component 1 sequentially includes 45° inner surface prepreg 1.1, -45° inner surface prepreg 1.2, honeycomb core 1.3, the first 0° outer surface prepreg 1.4, -45° outer surface prepreg 1.5, the second 0° outer surface prepreg 1.6, 45° outer surface prepreg 1.8, an ultra-low reflectivity FBG array is fixed by an adhesive layer 1.9 betw...

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Abstract

The invention discloses an intelligent honeycomb composite material based on an ultra-low reflectivity FBG array sensor. instrument, computer. In the present invention, the double-core ultra-low reflectivity FBG array sensor is embedded in the interlayer of the honeycomb composite material, and the time-division wave-division hybrid demodulation is used to simultaneously monitor and sense various parameters of the honeycomb composite material itself such as stress and strain, temperature, cracks, and vibration. Construct a distributed sensor network for monitoring the state of honeycomb composite materials, which has the characteristics of anti-electromagnetic interference, anti-corrosion, high temperature resistance, explosion-proof, wide frequency bandwidth, low loss, high precision, etc., and realizes self-sensing and self-evaluation of smart honeycomb composite materials, for The long-term safe operation of honeycomb composite components on high-speed operators is guaranteed.

Description

technical field [0001] The invention relates to the field of aerospace honeycomb composite materials, in particular to an intelligent honeycomb composite material based on an ultra-low reflectivity FBG array sensor. Background technique [0002] With the development of composite material science, composite materials are applied in more and more fields, especially in the field of aerospace, because honeycomb composite materials have the advantages of good structural design, high strength, high stiffness, light weight, and low cost. Some aerospace vehicle fuselages use honeycomb composite materials to replace traditional metal alloys. Under the long-term alternating influence of complex high-speed dynamic loads and climatic conditions, the weak parts of composite material fuselages are prone to accumulate fatigue damage. The characteristics of long time, difficulty in detection, and sudden damage have made online dynamic monitoring of fatigue characteristics of composite mater...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B9/00B32B9/04B32B3/12B32B7/12B32B3/08G01D5/353B64C1/00
CPCB32B3/08B32B3/12B32B5/02B32B5/26B32B7/12B32B2260/021B32B2262/106B32B2307/20B32B2307/306B32B2307/714B64C1/00B64C2001/0072G01D5/35316G01D5/35325G01D5/35387G01D5/3539
Inventor 童杏林李茂阳张翠陶渊邓承伟冒燕
Owner WUHAN UNIV OF TECH
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