| 摘要 |
<p>A capacitive angle encoder is shown in Figure (1) includes a rotating shaft (150) and a transmitter (52). Multiple segments are disposed about the shaft, each segment generating a periodic electric field at a common frequency, but having a different, predetermined phase from the other segments. A receiver (54) generates signals responsive to the fields from the multiple segments such that the strength of reception of each of the fields is modulated by a variation of a capacitance between the transmitter and the receiver as a function of rotation of the shaft. A detector circuit (64) processes the signals to generate an output indicative of the rotation angle.</p> |
