发明申请
US20040212375A1 Method and apparatus for stabilizing parasitic error capacitance in oil quality sensors
失效
基本信息:
- 专利标题： Method and apparatus for stabilizing parasitic error capacitance in oil quality sensors
- 专利标题（中）：用于稳定油质量传感器中的寄生误差电容的方法和装置
- 申请号：US10426131 申请日：2003-04-28
- 公开(公告)号：US20040212375A1 公开(公告)日：2004-10-28
- 发明人： Gary A. Marszalek
- 申请人： Detroit Diesel Corporation
- 申请人地址： null
- 专利权人： Detroit Diesel Corporation
- 当前专利权人： Detroit Diesel Corporation
- 当前专利权人地址： null
- 主分类号： G01R027/08
- IPC分类号： G01R027/08
摘要：
A sensor for detecting changes in the dielectric constant of a liquid is described. The sensor has two electrodes immersed in the liquid with dielectric surfaces substantially parallel with each other, and a ramp disposed on a support between the electrodes. The ramp intersects the surfaces at obtuse and acute angles respectively and provides a surface disposed at an angle relative to an electric field extending between the two electrodes, thereby reducing parasitic effects of the sensed dielectric content of the liquid. Slots in the electrode adjacent the lower end of the ramp reduce the strength of the field proximate to the ramp and thereby further reduce the parasitic effects.
摘要（中）：
描述了用于检测液体的介电常数变化的传感器。 该传感器具有浸入液体中的两个电极，电介质表面基本上彼此平行，以及设置在电极之间的支撑件上的斜面。 斜坡分别以钝角和锐角与表面相交，并且提供相对于在两个电极之间延伸的电场成一定角度设置的表面，从而减少所检测的液体的电介质含量的寄生效应。 邻近斜坡的电极中的狭槽减小了靠近斜坡的场强，从而进一步降低了寄生效应。