| 摘要 |
<p>Some embodiments provide a sensor element (12), a shield element (16) capacitively coupled to the sensor element and to ground, and a coupling circuit (44) to receive an input signal, to electrically couple the received input signal to the sensor element and to the shield element, and to generate an output signal, the output signal based on a capacitance between the sensor element and an object (20). Embodiments may also provide a classifier (46) to determine a material based on the output signal, and to output a material-based signal, the material-based signal based on the determined material, and a proximity evaluator (47) to detect the object based on the output signal and on the material-based signal.</p> |
