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1. 发明授权

US06295875B1 Process pressure measurement devices with improved error compensation 有权
标题翻译：具有改进误差补偿的过程压力测量装置
公开(公告)号：US06295875B1
公开(公告)日：2001-10-02
申请号：US09312411
申请日：1999-05-14
申请人： Roger L. Frick , Stanley E. Rud Jr. , David A. Broden
发明人： Roger L. Frick , Stanley E. Rud Jr. , David A. Broden
IPC分类号： G01L902
CPC分类号： G01L9/0075 , G01L9/0072 , G01L9/125 , G01L13/025
摘要： A device and method are able to compensate for diaphragm deformation (offset) and varying dielectric constants present in a process field environment. The device can be implemented as a pressure sensor or a transmitter having a pressure sensor. The pressure sensor, filled with a dielectric fill-fluid, includes at least three capacitor plates, disposed about a diaphragm. At least two capacitor plates are placed on one side of a conductive diaphragm, and are arranged in a particular manner with respect to the diaphragm. At least one capacitor plate is placed on the other side of the diaphragm. The method compensates for both diaphragm offset and variances in the dielectric constant of the fill-fluid. An error compensated measurement of differential pressure is a function of the amount of diaphragm deflection detected at the edge region subtracted from the amount of diaphragm deflection.
摘要翻译：装置和方法能够补偿过程现场环境中存在的隔膜变形（偏移）和变化的介电常数。该装置可以被实现为具有压力传感器的压力传感器或变送器。填充有电介质填充流体的压力传感器包括围绕隔膜设置的至少三个电容器板。至少两个电容器板放置在导电隔膜的一侧，并且以相对于隔膜的特定方式布置。至少一个电容器板放置在隔膜的另一侧。该方法补偿了膜片偏移和填充液介电常数的变化。差压的误差补偿测量是在从膜片偏转量减去的边缘区域处检测到的膜片偏转量的函数。

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