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1. 发明公开

EP1029236A1 MOISTURE SENSOR 有权
标题翻译：湿度传感器
公开(公告)号：EP1029236A1
公开(公告)日：2000-08-23
申请号：EP98949170.9
申请日：1998-10-23
申请人： ZELLWEGER LUWA AG
发明人： GHORASHI, Hossein, M. , GALYON, Michael, E. , BLALOCK, T., Vaughn
IPC分类号： G01N27/60
CPC分类号： G01N27/605
摘要： An apparatus measures moisture content of cotton based upon rates of electrical charges flowing through the cotton. The apparatus includes a moisture sensor having first electrodes, second electrodes, and ground electrodes which are interdigitated between the first and second electrodes. The apparatus also includes a moisture content determination circuit that provides first electrical charges to the first electrodes, and second electrical charges to the second electrodes. The moisture content determination circuit determines the rate of electrical charge flowing from each of the first and second electrodes through the cotton to the ground electrodes, and determines the moisture content of the cotton based upon the rates of electrical charges flowing through the cotton. By thus applying first electrical charges to the first electrodes and second electrical charges to the second electrodes, the apparatus accurately measures the moisture content of the cotton over a wide range of moisture contents. This wide range is achieved by setting the first electrical charges of the first electrodes to a level which is optimal for moisture levels at the upper end of the desired measurement range, and by setting the second electrical charges on the second electrodes to a level which is optimal for moisture levels at the lower end of the desired measurement range.
摘要翻译：一种设备根据流过棉花的电荷的速率来测量棉花的含水量。该设备包括具有第一电极，第二电极以及在第一和第二电极之间交叉的接地电极的湿度传感器。该设备还包括水分含量确定电路，该电路向第一电极提供第一电荷，并向第二电极提供第二电荷。水分含量确定电路确定从第一和第二电极中的每一个通过棉花流到接地电极的电荷的速率，并且基于流过棉花的电荷的速率确定棉花的含水量。通过这样向第一电极施加第一电荷并向第二电极施加第二电荷，该装置在宽范围的湿度下精确测量棉花的含水量。通过将第一电极的第一电荷设置为对于期望测量范围的上端的湿度水平最佳的水平，并且通过将第二电极上的第二电荷设置为在所需测量范围的下限处对湿度水平最佳。

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