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首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >A Flow-Measuring Algorithm of Arc-Bottomed Open Channels through Multiple Characteristic Sensing Points of the Flow-Velocity Sensor in Agricultural Irrigation Areas
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A Flow-Measuring Algorithm of Arc-Bottomed Open Channels through Multiple Characteristic Sensing Points of the Flow-Velocity Sensor in Agricultural Irrigation Areas

机译：通过农业灌溉区流速传感器的多种特征传感点流动测量算法

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摘要

Precise flow measurement in the open channel is a key prerequisite to implementation of modern agricultural efficient water use. The channel with an arc-bottomed shape is the most common channel type in irrigation area at present. The paper has verified the log-law is along the normal line rather than along the vertical line in arc-bottom channel. By conducting the velocity distribution log-law, this paper derives the expression of the multiple characteristic sensing points location of the flow-velocity sensor in the channel section, which is along the normal line. Based on this, a new algorithm to estimate the discharge of the arc-bottomed channel flow is proposed. We have also developed the experiment of the arc-bottomed channels (including semicircular channels, arc-bottom trapezoidal channels and U-shaped channels) and utilize the data to verify the method. The results indicate that the sensing locations expression of the flow velocity measuring sensor such as acoustic doppler velocimetry and propeller is suitable for improving discharge estimation’s accuracy of the arc-bottomed channels. This method could be extensively used in estimating discharge of irrigation and drainage channels in agricultural water conservancy projects. It will enhance the efficiency and accuracy of water resources management departments in irrigation areas, which also meet the strategic requirements of agricultural sustainable development.
机译：开放通道的精确流量测量是实施现代农业有效用水的关键前提。具有电弧底部形状的通道是目前的灌溉区域中最常见的通道类型。本文已验证了数量沿着正常线而不是沿弧形通道中的垂直线。通过进行速度分布记录法，本文得出了沿着正常线的通道部分中的流速传感器的多特征感测点位置的表达式。基于此，提出了一种估计电弧底通道流量的排出的新算法。我们还开发了电弧底通道（包括半圆通道，弧形梯形梯形通道和U形通道）的实验，并利用数据来验证该方法。结果表明，声速测量传感器（如声学多普勒速度和螺旋桨）的感测位置表达式适用于提高弧形底部通道的放电估计的准确性。该方法可广泛用于估算农业水利项目中灌溉和排水通道的排放。它将提高水资源管理部门在灌溉领域的效率和准确性，也符合农业可持续发展的战略要求。

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