| 摘要 |
PURPOSE: An area-adjustable capacitive sensor and a method for self-compensation and signal linearization thereof are provided to obtain signals like triangle waves by reducing signal non-linearity due to nonlinear effect on the edge of an electrode. CONSTITUTION: Area-adjustable capacitive sensors(100a,100b,100c) comprise a first electrode set(1), a second electrode set(2), a third electrode set(3), and a fourth electrode set(4). The first electrode set is placed in a sensor. The first electrode set crests a reference signal. The second electrode set is placed in the sensor to produce signals having 90 degree phase difference based on the reference signal. The third electrode set is placed in the sensor to produce signals having 180 degree phase difference based on the reference signal. The fourth electrode set is placed in the sensor to produce signals having 270 degree phase difference based on the reference signal. |
