本文選題：相干探測 + 光時域反射��； 參考：《物理學(xué)報(bào)》2017年07期

【摘要】：開展了基于相干光時域反射型的光纖分布式聲增敏傳感研究,提出了單端固定開口波紋薄筒光纖聲增敏方法,建立了光纖聲增敏裝置波節(jié)間距、單波節(jié)軸向剛度、光纖長度等參數(shù)對光纖相位靈敏度的影響理論模型.制作了3種規(guī)格的光纖聲增敏傳感裝置進(jìn)行聲傳感實(shí)驗(yàn).實(shí)驗(yàn)結(jié)果表明,聲增敏傳感裝置相位靈敏度達(dá)到2.975 rad/Pa,最小聲探測信號達(dá)到60.1 dB,3種規(guī)格的聲增敏傳感裝置的靈敏度測試值與理論分析基本一致.研究結(jié)果為高靈敏度的光纖分布式聲傳感的進(jìn)一步發(fā)展提供了理論和實(shí)驗(yàn)基礎(chǔ).
[Abstract]:The research of optical fiber distributed acoustic sensitization sensor based on coherent optical time domain reflectance is carried out, and a single end fixed open corrugated thin cylinder optical fiber acoustic sensitization method is proposed. The pitch of wave segments and the axial stiffness of single wave segments of the optical fiber acoustic sensitizing device are established. Theoretical model of influence of fiber length and other parameters on fiber phase sensitivity. Three kinds of optical fiber acoustical sensitizing sensor devices are made to carry out sound sensing experiment. The experimental results show that the phase sensitivity of the acoustical sensitized sensing device reaches 2.975 RPA and the lowest sound detection signal reaches 60.1 dB ~ (3) specifications. The measured values of the sensitivity of the acoustic-sensitized sensing device are basically consistent with the theoretical analysis. The results provide a theoretical and experimental basis for the further development of high sensitivity optical fiber distributed acoustic sensors.
【作者單位】： 天津大學(xué)精密儀器與光電子工程學(xué)院 天津大學(xué)水利工程仿真與安全國家重點(diǎn)實(shí)驗(yàn)室 光電信息技術(shù)科學(xué)教育部重點(diǎn)實(shí)驗(yàn)室 天津大學(xué)光纖傳感研究所 天津市光纖傳感工程中心;
【基金】：國家自然科學(xué)基金(批準(zhǔn)號:61675152,61227011,61378043,61475114,61505139,61505138) 國家重大科學(xué)儀器設(shè)備開發(fā)專項(xiàng)(批準(zhǔn)號:2013YQ030915) 深圳科技研究計(jì)劃(批準(zhǔn)號:JCYJ20120831153904083)資助的課題~~
【分類號】：TP212
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本文編號：1996507