Patent ID: 8461786
Filing Date: 2013-06-11
Classification: G05D,H02P

Abstract:
1. A method for determining the position of a closing part of a vehicle which may be moved by a direct-current motor comprising: providing a motor current signal, converting the motor current signal into a digital signal by means of an analog-digital converter, filtering the output signal of the analog-digital converter forwarding the filtered signal to a position counter for determining the position of the closing part, estimating a rotational speed of the direct-current motor based on the digital output signal of the analog-digital converter, generating a sampling frequency control signal based on the estimated rotational speed of the direct-current motor, and using the sampling frequency control signal to automatically modify the sampling frequency of the analog-digital converter, such that the sampling frequency is automatically reduced in connection with a reduction in the rotational speed of the direct-current motor, thereby reducing computer power associated with sampling the analog-digital converter during reduced rotational speeds of the direct-current motor.