本文選題：太赫茲 + 隔熱瓦�。� 參考：《華中科技大學(xué)》2015年碩士論文

【摘要】：陶瓷纖維隔熱瓦具有輕質(zhì)、耐高溫、低熱導(dǎo)率等優(yōu)點(diǎn),是目前航空、航天飛行器最主要的熱防護(hù)材料,隔熱瓦與飛行器外殼之間的漏粘、脫粘等情況會(huì)極大地影響隔熱瓦的熱防護(hù)性能。太赫茲波具有高光譜分辨率、透視性、安全性等特點(diǎn),能夠有效地檢測(cè)并識(shí)別被測(cè)物體內(nèi)部的缺陷,彌補(bǔ)傳統(tǒng)無(wú)損檢測(cè)手段在檢測(cè)隔熱瓦與飛行器之間粘接質(zhì)量方面的不足。圍繞太赫茲波無(wú)損檢測(cè)技術(shù)在檢測(cè)隔熱瓦粘接質(zhì)量方面的應(yīng)用,本論文主要包括以下幾個(gè)方面的內(nèi)容:針對(duì)隔熱瓦粘接質(zhì)量的檢測(cè),分析了超聲、X射線檢測(cè)等傳統(tǒng)檢測(cè)方法的局限性,并探討太赫茲波成像技術(shù)在無(wú)損檢測(cè)方面的優(yōu)勢(shì)。介紹本課題所使用的實(shí)驗(yàn)裝置,即SynViewScan300調(diào)頻連續(xù)太赫茲波成像系統(tǒng)。首先是系統(tǒng)所采用的太赫茲源、探測(cè)器并闡述其成像原理,然后具體分析系統(tǒng)層析成像的實(shí)現(xiàn),最后對(duì)提高測(cè)距精度方法的進(jìn)行理論分析。對(duì)太赫茲波性質(zhì)和SynViewScan300系統(tǒng)性能進(jìn)行測(cè)試。分析不同介質(zhì)對(duì)太赫茲波的反射、透射和吸收特性;測(cè)試系統(tǒng)的空間分辨率并分析其影響因素,以及系統(tǒng)在識(shí)別物體內(nèi)部夾雜物方面的可行性。制作隔熱瓦多層粘接結(jié)構(gòu)樣件,并設(shè)計(jì)不同缺陷模擬實(shí)際樣件可能出現(xiàn)的缺陷情況,對(duì)樣件進(jìn)行檢測(cè)并由檢測(cè)結(jié)果分析太赫茲波無(wú)損檢測(cè)技術(shù)甄別不同缺陷的能力。本論文研究?jī)?nèi)容為太赫茲無(wú)損檢測(cè)技術(shù)在隔熱板粘接質(zhì)量的檢測(cè)方面的應(yīng)用提供了理論和實(shí)驗(yàn)依據(jù)。
[Abstract]:Ceramic fiber thermal insulation tile has the advantages of light weight, high temperature resistance, low thermal conductivity and so on. It is the most important thermal protection material for aeronautical and spaceflight vehicles, and the leakage of viscosity between the thermal insulation tile and the outer shell of the aircraft. Debonding and other conditions will greatly affect the thermal protection performance of the thermal insulation tile. Terahertz wave has the characteristics of high spectral resolution, perspective, safety and so on. It can effectively detect and identify the internal defects of the object under test, and make up for the shortcomings of traditional nondestructive testing methods in detecting the bonding quality between the thermal insulation tile and the aircraft. Around the application of terahertz wave nondestructive testing technology in testing the bonding quality of thermal insulation tiles, this paper mainly includes the following aspects: testing the bonding quality of thermal insulation tiles, The limitations of traditional testing methods, such as ultrasonic X-ray testing, are analyzed, and the advantages of terahertz wave imaging in nondestructive testing are discussed. This paper introduces the experimental device, Synview Scan300 FM CW terahertz imaging system. First, the terahertz source used in the system is used, and the imaging principle of the detector is described. Then, the realization of the system tomography is analyzed in detail. Finally, the theoretical analysis of the method to improve the ranging accuracy is carried out. The properties of terahertz wave and the performance of SynViewScan300 system were tested. The reflection, transmission and absorption characteristics of terahertz waves in different media are analyzed, the spatial resolution of the system is measured and the influencing factors are analyzed, as well as the feasibility of the system in identifying inclusions inside the object. In this paper, the thermal insulation layer bonded structural samples are made, and different defects are designed to simulate the possible defects in the actual samples. The samples are tested and the ability of THz wave nondestructive testing technology to identify different defects is analyzed by the test results. This paper provides theoretical and experimental basis for the application of terahertz nondestructive testing technology in the testing of adhesive quality of heat insulation plate.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TQ174.758.21

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