Abstract:
The invention relates to a capacitive sensor (2) for detecting an object, in particular for detecting the event of a collision in a mobile vehicle part. The sensor (2) comprises an electrode array (4) having at least one sensor electrode (6). The sensor (2) further comprises a signal generating circuit (7) located upstream of the at least one sensor electrode (5) for generating a transmission signal (SE), wherein the signal generating circuit (7) generates the transmission signal (SE) as a pulse signal having a trapezoid or triangular temporal pulse shape.
Abstract:
The invention specifies a capacitive sensor (2) for detecting an object, in particular for detecting a collision in the case of a movable vehicle part, and an anti-collision apparatus (1) having such a sensor (2). The sensor (2) has an electrode arrangement (4) comprising at least one transmitting electrode (5) and at least one receiving electrode (6). Furthermore, the sensor (2) has a signal generation circuit (7) which is connected upstream of the at least one transmitting electrode (5) and is intended to generate a transmission signal (SE). In this case, the signal generation circuit (7) generates the transmission signal (SE) in the form of a square-wave pulse signal corresponding directly to a pseudo-random bit string.
Abstract:
According to the invention, for processing a motor signal (Ia, Um) of a DC motor (4), in particular an adjusting drive of a motor vehicle, the armature current (la) and the motor tension (Um) of the DC motor (4) are detected and are used to determine the counter induction tension (E) of the DC motor (4). Using the determined counter induction tension (E), a useful signal (Sf,SÜKB), in particular proportional to the rotational speed, is produced from the armature current signal (Ia) for detecting the position and/or for evaluating an excess force limitation.
Abstract:
A method for calibrating a powered actuator (1) for use in a vehicle is disclosed, with regard to an end position (6,7) of an actuating element (2) which is easy to achieve and conserves easily damaged mechanical components of the actuator made from plastic, rubber or similar. According to the invention, in a calibrating step, the actuator (1) is operated with recording and analysis of an actuation speed measured parameter (U) such that the actuating element (2) is moved in the direction of the end position (6,7) and reaching the end position (6,7) is recognised when the value of the actuation speed measured parameter (U) reaches or drops below a given threshold. A temperature parameter (T) characterising the temperature of the actuator (1) is evaluated before or during the calibration process. The calibration step is then only carried out if the value of the temperature parameter (T) does not exceed an upper temperature limit. An actuator (1) suitable for carrying out said method is also disclosed.