| 摘要 |
<p num="1"><br/><br/><br/>A capacitive encoder includes a signal-balanced shield electrode configuration <br/>that does not require electrical ground connection or active sensing and <br/>control in order to maintain the shield electrode(s) at a sufficiently <br/>constant voltage during capacitive position measurements. The shield electrode <br/>configuration is positioned in a capacitive coupling gap between transmitter <br/>electrodes and receiver electrodes during operation. The shield electrode <br/>configuration is patterned in a manner that complements the layout of the <br/>transmitter electrodes, such that the shield electrode configuration <br/>inherently floats at a nominally constant electrical potential when coupled to <br/>the signals present on the transmitter electrodes. The resulting capacitive <br/>encoder is thus more economical to build, convenient to install, and reliable <br/>during operation than capacitive encoders which use an electrical connection, <br/>compensation drive circuitry, or grounding in order to control the potential <br/>of a shield member that operates at a potential that is not inherently <br/>constant.<br/>
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