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1. 发明申请

WO2013025371A1 MAINTAINING A MEASUREMENT GAP IN A RHEOMETER 审中-公开
标题翻译：维护一个测温仪中的测量水平
公开(公告)号：WO2013025371A1
公开(公告)日：2013-02-21
申请号：PCT/US2012/049469
申请日：2012-08-03
申请人： WATERS TECHNOLOGIES CORPORATION , DOE, Nigel , FOSTER, Peter
发明人： DOE, Nigel , FOSTER, Peter
IPC分类号： G01N11/04
CPC分类号： G01N11/142 , G01N11/04 , G01N11/14 , G01N2011/0006 , G01N2011/0013
摘要： A rheometer includes a drive shaft, a drag cup motor for rotating the drive shaft, a first measuring object supported by the drive shaft, a second measuring object, a linear position sensor, and processing and control electronics. The linear position sensor includes a target (e.g., an aluminum target) mounted to the drive shaft, and a pair of coils. The linear position sensor is configured to measure thermal expansion of the drive shaft based on a change in impedance of the coils resulting from a displacement of the target relative to the coils. The processing and control electronics are in communication with the coils and are configured to adjust a position of one of the measuring objects relative to the other based on a change in impedance of the coils resulting from a displacement of the target relative to the coils, thereby to maintain a substantially constant measurement gap therebetween.
摘要翻译：流变仪包括驱动轴，用于旋转驱动轴的牵引杯马达，由驱动轴支撑的第一测量对象，第二测量对象，线性位置传感器和处理和控制电子装置。线性位置传感器包括安装到驱动轴的目标（例如，铝靶）和一对线圈。线性位置传感器被配置为基于由靶相对于线圈的位移导致的线圈阻抗的变化来测量驱动轴的热膨胀。处理和控制电子设备与线圈连通，并且被配置成基于由目标相对于线圈的位移产生的线圈的阻抗的变化来调整测量对象之一相对于另一个测量对象的位置，由此以保持它们之间基本恒定的测量间隙。

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