Method and motor control system for use in a vehicle roof assembly
AssigneeInalfa Roof Systems Group B.V.
InventorsMarco Van Mourik, Petrus Gerardus Franciscus Bouten
Life of this patent
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Abstract
A vehicle roof assembly comprises an electronic control circuitry and at least one sensor operatively coupled to the electronic control circuitry. An output of the sensor exhibits hysteresis. A method of operating the vehicle roof assembly comprises performing a sensor power-down sequence. The sensor power-down sequence of steps comprises switching off the sensor; switching on the sensor; detecting the output of the sensor; storing the output of the sensor in a memory; and switching off the sensor. The method prevents inadvertent position drift due to hysteresis effects during a power toggle.
Claims20
A vehicle roof assembly comprising an electronic control circuitry having memory and a sensor having a power up state and a power down state and being operatively coupled to the electronic control circuitry, an output of the sensor exhibiting and being dependent on hysteresis,
- wherein the electronic control circuitry is configured to perform, to power down the sensor, a sensor power-down sequence from the power up state to the power down state comprising:
- switching off the sensor to power down;
- and
- prior to the switching off of the sensor:
- resetting the sensor by a power toggle of the sensor to output a hysteresis independent output:
- detecting the hysteresis independent output of the sensor;
- and
- storing the hysteresis independent output of the sensor in the memory for comparison with a later hysteresis independent output of the sensor, detected upon again powering up the sensor after having been switched off, to determine whether a state of the vehicle roof assembly has changed between storing the hysteresis independent output and the later hysteresis independent output.
A method of operating a vehicle roof assembly, the vehicle roof assembly comprising an electronic control circuitry and a sensor having a power up state and a power down state and being operatively coupled to the electronic control circuitry, an output of the sensor exhibiting and being dependent on hysteresis,
- wherein the method comprises performing, to power down the sensor, a sensor power-down sequence from the power up state of the sensor into the power down state of the sensor comprising:
- switching off the sensor to power down;
- and
- prior to the switching off of the sensor:
- resetting the sensor by a power toggle of the sensor to output a hysteresis independent output:
- detecting the hysteresis independent output of the sensor;
- and
- storing the hysteresis independent output of the sensor in a memory for comparison with a later hysteresis independent output of the sensor, detected upon again owering up the sensor after having been switched off, to determine whether a state of the vehicle roof assembly has changed between storing the hysteresis independent output and the later hysteresis independent output.
A computer software product comprising computer readable and executable instructions for instructing a computer processor to perform a method of operating a vehicle roof assembly, the vehicle roof assembly comprising an electronic control circuitry and a sensor having a power up state and a power down state and being operatively coupled to the electronic control circuitry, an output of the sensor exhibiting and being dependent on hysteresis, the instructions performing, to power down the sensor, a sensor power-down sequence from the power up state to the power down state comprising:
- switching off the sensor to power down;
- and
- prior to the switching off of the sensor:
- resetting the sensor by a power toggle of the sensor to output a hysteresis independent output:
- detecting the hysteresis independent output of the sensor;
- and
- storing the hysteresis independent output of the sensor in a memory for comparison with a later hysteresis independent output of the sensor, detected upon again powering up the sensor afte having been switched off, to determine whether a state of the vehicle roof assembly has changed between storing the hysteresis independent output and the later hysteresis independent output.
Dependencies are inferred from the claim text.