Electrical resistance tomography for suspended sediment measurements in open channel flows using a novel sensor design
Electrical resistance tomography for suspended sediment measurements in open channel flows using a novel sensor design
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DOI：
10.1002/ppsc.200601062
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发表时间：
2006-10-01
影响因子：
2.7
通讯作者：
Peakall, Jeff
中科院分区：
文献类型：
--
作者：
Schlaberg, H. Inaki;Baas, Jaco H.;Peakall, Jeff
了解沉积物（如沙子和粘土）的迁移和沉积，对于在现代环境和古代沉积盆地中模拟和预测沉积物扩散以及沉积形态的发展至关重要。电阻层析成像（ERT）先前已用于提供移动悬浮液内的颗粒浓度的测量。ERT测量通常采用围绕容器的圆形边界的电极，其允许测量多个投影。然而，在不干扰流的情况下测量矩形通道中的流的浓度不能使用这些公认的传感器环。本文研究了使用的线性传感器阵列的通道床，和一个U形传感器阵列的通道床和墙壁，测量空间和时间梯度的泥沙浓度/电导率的channellised流。为了克服沉积物覆盖的电极的效果和线性传感器配置的投影角的有限数量的问题，探索了U形传感器的特性。由于U形传感器中的附加投影角，获得了改进的重建。本文介绍了第一次测量悬浮泥沙浓度和泥沙沉积和测试对象使用线性和U形层析传感器。
Understanding the transport and deposition of sediment (such as sand and clay) is essential to allow the modelling and prediction of sediment dispersal, and the development of depositional morphology, within modern environments and ancient sedimentary basins. Electrical Resistance Tomography (ERT) has previously been used to provide a measure of particle concentration within moving suspensions. ERT measurements normally employ electrodes around a circular boundary of a container that allows measurement of multiple projections. However, measuring the concentration of a flow in a rectangular channel without disturbing the flow cannot use these well-established sensor rings. This paper investigates the use of a linear sensor array in the channel bed, and a U-shaped sensor array in the channel bed and walls, to measure spatial and temporal gradients in sediment concentration/conductivity of a channellised flow. To overcome the problems with the effect of sediment-covered electrodes and the limited number of projection angles of a linear sensor configuration, the properties of a U-shaped sensor are explored. Due to the additional projection angles in a U-shaped sensor, improved reconstructions are obtained. This paper presents the first measurements of suspended sediment concentration and sediment deposition and test objects using linear and U-shaped tomographic sensors.