Research on the Principle of the Driven Shield Capacitance Proximity Sensor

The equivalent capacitance formula of capacifelector (driven shield capacitance sensor ) is given by the mutual capacitance and the self capacitance of electrodes in the thesis. Comparing two cases of the capacifelector and the capacitance sensor without shield electrode, the result is found that the equivalent capacitance of capacifelector is less more than the one the capacitance sensor without shield electrode, and verified by experiment.