| 摘要 |
<p>A capacitive activated switch device in combination with a transit vehicle having a wall member with a wall aperture which has a door driven by a door drive in combination with a door controller to cover or uncover the wall aperture. The capacitance activated switch device enables the door controller and the door drive to open or close the door and comprises:
a) an activating member;
b) an electrical antenna conductor coupled to the activating member; and
c) a control means including a generator for generating a sine wave, an antenna output for transmitting the sine wave, a first resistor enabling generation of a first voltage to the generator and a second voltage to the antenna. The control means provides a control signal to the door controller. The control signal is associated with a change of the second voltage, whereby a supply of the input voltage enables the control means to generate and transmit the sign wave to the at least one electrical antenna conductor via the antenna output, thus forming an electrical field about a portion of the activating member. The electrical field has a predetermined depth such that a grounded object engaging the electrical field generates a capacitive load and causes the change of the second voltage. The change is received by the control means and manipulated thereby to provide the control signal to the door controller enabling the door drive to move the door.</p> |
