【摘要】：提出了基于光纖微彎損耗原理和光時(shí)域反射OTDR技術(shù),針對(duì)新型無(wú)黏土層危險(xiǎn)廢物填埋場(chǎng)滲漏檢測(cè)的定位方法。由于滲漏的垃圾滲濾液會(huì)使膨潤(rùn)土防水毯(GCL)膨脹,導(dǎo)致與之緊貼的光纖發(fā)生彎曲變形,激光束通過(guò)彎曲的光纖會(huì)出現(xiàn)光能損耗,通過(guò)測(cè)量后向瑞利散射光的功率,即可實(shí)現(xiàn)對(duì)光纖沿程的彎曲情況進(jìn)行檢測(cè),結(jié)合光時(shí)域反射原理對(duì)出現(xiàn)彎曲損耗的故障點(diǎn)進(jìn)行定位。建立了填埋場(chǎng)滲漏檢測(cè)的數(shù)學(xué)模型,利用理論推導(dǎo)和實(shí)驗(yàn)研究證實(shí)了該方法的可行性。實(shí)測(cè)結(jié)果表明:防滲膜破損位置與測(cè)量結(jié)果高度吻合,最大定位誤差為1.4 m,最大定位引用誤差為0.133%。
[Abstract]:Based on the principle of optical fiber micro-bending loss and optical time domain reflectance (OTDR), this paper presents a new location method for leakage detection of hazardous waste landfill without clay layer. The leakage of landfill leachate will cause the (GCL) expansion of the bentonite waterproof blanket, resulting in the bending and deformation of the adjacent optical fiber, the loss of light energy of the laser beam passing through the bent fiber, and the measurement of the power of the light scattered back to Rayleigh. It can detect the bending of optical fiber along the path and locate the fault point of bending loss in combination with the principle of optical time domain reflection. The mathematical model of landfill leakage detection is established, and the feasibility of the method is verified by theoretical derivation and experimental study. The measured results show that the damage position of the membrane is in good agreement with the measured results, the maximum positioning error is 1.4 m, and the maximum position reference error is 0.133 m.
【作者單位】： 河北工程大學(xué)機(jī)電學(xué)院;河北工業(yè)大學(xué)機(jī)械工程學(xué)院;
【基金】：河北省高等學(xué)校科學(xué)技術(shù)處資助項(xiàng)目(QN2016089)
【分類(lèi)號(hào)】：X705
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本文編號(hào)：2287957