Apparatus for interrupting operation of a motor driven movable member upon contacting an obstacle
First Claim
1. Apparatus adopted to interrupt closing operation of a movable closing member driven by an electric motor in a motor vehicle, upon detection of an obstacle which obstructs such closing operation, said apparatus comprising:
- a pressure-sensitive sensor strip which is arranged on a closing edge of said movable closing member, and which emits a signal when pressure is applied;
an electronic control device for controlling said electric motor which drives the closing member, said electronic control device having a control input driven by a sensor signal derived from the signal from the sensor strip, for halting or reversing operation of said motor;
a base station arranged on a stationary part of said vehicle, which generates an alternating electromagnetic field; and
a responsive circuit arranged on said closing member and connected to receive said signal from said sensor strip, said responsive circuit being coupled by said electromagnetic field generated by said base station, and being driven by said signal from said sensor strip to modify said electromagnetic field as a function thereof;
wherein said base station evaluates changes in the alternating electromagnetic field, and generates said sensor signal in response thereto.
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Accused Products
Abstract
The invention relates to an apparatus for interrupting the closing operation of an electric motor driven movable closing element, such as a vehicle sunroof when an obstacle which obstructs the closing operation is detected. A pressure-sensitive sensor strip is arranged on the closing edge of the moved closing part and the sensor signal is transmitted in accordance with the transponder principle by an attenuation modulation of an electromagnetic alternating field. The wireless sensor signal which is thus transmitted controls the control device for the electric drive of the closing part. When an obstacle is detected, the drive is switched off or reversed, depending on the sensed pressure applied to the sensor strip. The sensor strip is preferably implemented by a resistive foil pressure sensor.
25 Citations
12 Claims
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1. Apparatus adopted to interrupt closing operation of a movable closing member driven by an electric motor in a motor vehicle, upon detection of an obstacle which obstructs such closing operation, said apparatus comprising:
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a pressure-sensitive sensor strip which is arranged on a closing edge of said movable closing member, and which emits a signal when pressure is applied; an electronic control device for controlling said electric motor which drives the closing member, said electronic control device having a control input driven by a sensor signal derived from the signal from the sensor strip, for halting or reversing operation of said motor; a base station arranged on a stationary part of said vehicle, which generates an alternating electromagnetic field; and a responsive circuit arranged on said closing member and connected to receive said signal from said sensor strip, said responsive circuit being coupled by said electromagnetic field generated by said base station, and being driven by said signal from said sensor strip to modify said electromagnetic field as a function thereof; wherein said base station evaluates changes in the alternating electromagnetic field, and generates said sensor signal in response thereto. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification