| 摘要 |
12 METHOD AND MEANS FOR SENSING A CHANGE IN CAPACITANCE BY A COMPUTER A method and means for using a computer for sensing a capacitive change in a sensor having a capacitive impedance component. The sensor is connected between the input and output ports of a computer which produces a periodic waveform at the output port and monitors the capacitor's discharge or charge time at its input port. The monitored times are compared to previous monitored times wherein a change in time indicates a change in capacitance.
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