Concentration measurement without calibration of natural sediment particles using backscatter sensing with optical fibres

Concentration measurement without calibration of natural sediment particles using backscatter sensing with optical fibres
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使用光纤反向散射传感无需校准天然沉积物颗粒即可进行浓度测量

DOI:
10.1016/j.measurement.2020.108256
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发表时间:
2021
期刊:
影响因子:
5.6
通讯作者:
Zhang Qinghe
Zhang Qinghe
中科院分区:
工程技术2区
文献类型:
--
作者:
Huang Rui;Zhang Qinghe

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本文介绍了一套新研制的微型光纤泥沙浓度测量仪,用于天然泥沙的浓度测量。通过对我国不同海滩不同粒径分布的天然沉积物进行标定,建立了两种统一的天然沉积物浓度与光学后向散射强度输出电压的关系,从而无需标定即可获得天然沉积物浓度。本文提出了组分加权粒径的概念,用以表征天然沉积物的光学后向散射特性,使其在无标度含沙量测量中更为精确。在已知天然沉积物粒度分布的前提下,无需再标定含沙量,可利用统一的关系式直接测量含沙量,为天然沉积物浓度测量提供了一种新的高度方便的方法。
A set of newly developed miniature optical fibre sediment concentration measuring instrument is used.for the concentration measurement of natural sediments. Through calibration with natural sediments.of different particle size distributions collected from different beaches in China, we establish two unified.relations between natural sediment concentration and output voltage of optical backscatter intensity to.obtain the natural sediment concentration without calibration. The concept of the compositional.weighted sediment size is proposed to characterize the optical backscatter property of natural sediments,.which is more accurate for non-calibration sediment concentration measurement. On the premise that.particle size distribution of natural sediments is known, it is no longer necessary to calibrate sediment.concentration, and the unified relations can be used to directly measure sediment concentration, which.provides a new highly convenient concentration measurement method of natural sediments.
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