A low-cost bench-top research device for turbidity measurement by radially distributed illumination intensity sensing at multiple wavelengths
A low-cost bench-top research device for turbidity measurement by radially distributed illumination intensity sensing at multiple wavelengths
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DOI：
10.1016/j.ohx.2019.e00052
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发表时间：
2019-04-01
期刊：
影响因子：
2.2
通讯作者：
Hewett, Caspar J. M.
中科院分区：
文献类型：
--
作者：
Kitchener, Ben G. B.;Dixon, Simon D.;Hewett, Caspar J. M.
本文介绍了一种新的用于测量天然含泥沙水样光学浊度的台式研究装置。该原型设备采用18个独特的角度测量位置和各种用户可选的LED光源。该项目的动机是需要生成更多与天然沉积物悬浮液的光散射特性有关的参数丰富的数据集，并解决Kitchener等人提出的问题。（2017）关于目前用于通过光学浊度测量量化悬浮沉积物浓度（SSC）的不一致校准方法。机械设计包括重新利用的废塑料材料和3D打印部件。有源光源控制和监控硬件和固件在开源Arduino嵌入式微控制器平台上执行。模块化光传感器可插入任何角度测量位置，提供0-5 V标称输出信号，用户选择的数据采集系统可读取该信号。该设备将有助于对悬浮沉积物样品进行非常详细的表征，提供18个电压输出通道供用户分析。光传感器的精确校准是通过使用中性密度（ND）滤光片结合光源电流测量，提供所需的光源强度值。现有浊度计提供的经验数据是使用无公度方法获得的，因此它们不能交叉比较。这里描述的一种新方法，有利于浊度测量的交叉可比性。(C)2019年，任作家。爱思唯尔有限公司出版
Presented here is a new bench-top research device for the measurement of the optical turbidity of natural sediment-laden water samples. This prototype device employs 18 unique angular measurement positions and a variety of user-selectable LED light sources. The motivation for this project was the need to generate more parameter-rich data sets pertaining to the light-scattering properties of natural sediment suspensions, and to address the issues raised by Kitchener et al. (2017) concerning the inconsistent calibration methodologies currently employed to quantify suspended sediment concentration (SSC) by optical turbidity measurement. The mechanical design comprises re-purposed waste plastic materials and 3D-printed parts. The active light-source control and monitoring hardware and firmware executes on the open-source Arduino embedded microcontroller platform. The modular light sensors plug into any of the angular measurement positions, providing a 0-5 V nominal output signal, which is readable by the user's choice of data-acquisition system. The device will facilitate the highly detailed characterization of suspended sediment samples, providing 18 voltage output channels for analysis by the user. The precise calibration of the light sensors is by the use of neutral density (ND) filters in conjunction with light-source electrical current measurements, providing light-source intensity values as required. The empirical data provided by existing turbidity meters are acquired using incommensurate methodologies, and therefore they are not cross-comparable. A new methodology, described here, facilitates the cross-comparability of turbidity measurements. (C) 2019 The Authors. Published by Elsevier Ltd.