基于光纤微弯损耗的垃圾填埋场渗漏定位研究
发布时间：2018-10-22 18:23
【摘要】：提出了基于光纤微弯损耗原理和光时域反射OTDR技术,针对新型无黏土层危险废物填埋场渗漏检测的定位方法。由于渗漏的垃圾渗滤液会使膨润土防水毯(GCL)膨胀,导致与之紧贴的光纤发生弯曲变形,激光束通过弯曲的光纤会出现光能损耗,通过测量后向瑞利散射光的功率,即可实现对光纤沿程的弯曲情况进行检测,结合光时域反射原理对出现弯曲损耗的故障点进行定位。建立了填埋场渗漏检测的数学模型,利用理论推导和实验研究证实了该方法的可行性。实测结果表明:防渗膜破损位置与测量结果高度吻合,最大定位误差为1.4 m,最大定位引用误差为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.
【作者单位】： 河北工程大学机电学院;河北工业大学机械工程学院;
【基金】：河北省高等学校科学技术处资助项目(QN2016089)
【分类号】：X705
，
本文编号：2287957
[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.
【作者单位】： 河北工程大学机电学院;河北工业大学机械工程学院;
【基金】：河北省高等学校科学技术处资助项目(QN2016089)
【分类号】：X705
，
本文编号：2287957
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