An electric power steering system. One example includes a steering control, a steering shaft connected to the steering control, a steering rack, a sensor configured to detect an operating parameter of the steering rack or an electric motor, and an electronic controller. In one example, the electronic controller is configured to receive data indicative of the operating parameter from the sensor, compare the data to a known characteristic curve, the known characteristic curve indicating potential damage to a component of the electric power steering system, and when the data matches the known characteristic curve, output an indication to a user that potential damage has occurred to the component of the electric power steering system.

A speed sensor for detecting a speed of a magnetizable object. The speed sensor (100) can be supplied with an electric alternating signal with a first frequency by an electric signal source. The speed sensor including: a primary coil for generating a magnetic alternating field with the first frequency; first and second secondary coils. The first and second secondary coils can each be magnetically coupled to the primary coil via a magnetizable object. First and second electric signals induced in the first and second secondary coils respectively by the generated magnetic alternating field; a Goertzel filter bank detects first and second amplitude values of respective spectral components of the induced first and second electric signals in the event of a second frequency which differs from the first frequency. A processor determines the speed of the magnetizable object depending on the detected first amplitude value and the detected second amplitude value.

A method for determining a fully extended position of a screening body (14) of a screening device (12) for a roof window. The screening device (12) comprises a control unit comprising a data storage device, an electric motor (18) comprising a tachometer (181), a roller tube (15), a screening body (14) and a first and a second spring element (164, 174). The method comprises the steps of driving the screening body (14) from a fully retracted position to a fully extended position, in which the spring elements (164, 174) are tensioned to a first tension level, T.sub.1, stopping the electric motor (18) at a point at which the spring elements (164, 174) are tensioned to a second tension level, T.sub.2, above the first tension level, T.sub.1, measuring the number of revolutions, R.sub.d, of the roller tube (15) necessary to drive the screening body (14) to the said position at which the motor (18) is stopped, storing the measured number of revolutions, R.sub.d, in the data storage device, measuring the number of revolutions, R.sub.b, of the roller tube, that a release of a tension corresponding to the difference, T, between the first tension level, T.sub.1, and the second tension level, T.sub.2, will cause the roller tube (15) to move back towards the fully retracted position, storing the number of revolutions, R.sub.b, in the data storage device, and calculating and storing in the data storage device a value R=R.sub.dR.sub.b.

An electric power steering system. One example includes a steering control, a steering shaft connected to the steering control, a steering rack, a sensor configured to detect an operating parameter of the steering rack or an electric motor, and an electronic controller. In one example, the electronic controller is configured to receive data indicative of the operating parameter from the sensor, compare the data to a known characteristic curve, the known characteristic curve indicating potential damage to a component of the electric power steering system, and when the data matches the known characteristic curve, output an indication to a user that potential damage has occurred to the component of the electric power steering system.

An actual slip amount (S) of a torque converter is calculated by subtracting an actual input shaft rotational speed (Nr) of an automatic transmission from an engine rotational speed (Ne), which is the rotational speed of a crankshaft. Then, an engine rotational speed for display (Nd) is calculated by adding a slip amount adjusted for display (Sp), which is obtained by applying a predetermined correction process to the actual slip amount (S) to the actual input shaft rotational speed (Nr). The above described correction process may be a first-order-lag filter processing, for example. Thus, even when the actual slip amount (S) temporarily increases or decreases, a temporary increase or decrease in the engine rotational speed for display (Nd) may be suppressed. In other words, fluctuation or variation in the engine rotational speed for display (Nd) is suppressed. Further, Further, it is possible to provide the driver with a visually excellent direct-feeling display of engine speed Nd without impairing the drivability.

A point location method for a vehicle moving on a constrained trajectory, implemented by a location device comprises tachometry means, odometry means, a group of at least one satellite geopositioning receiver and a time base synchronized to a satellite geopositioning system, the location device detecting the passage of the vehicle closest to a predetermined position by exploiting knowledge of the displacement of the vehicle, by predicting the form of a set of satellite geopositioning signals at the predetermined position and by testing the match between the predicted signals and those received by the group of at least one satellite geopositioning receiver, the displacement of the vehicle being determined from data supplied by the odometry means and a mapping of the trajectory.

A method for determining a fully extended position of a screening body (14) of a screening device (12) for a roof window. The screening device (12) comprises a control unit comprising a data storage device, an electric motor (18) comprising a tachometer (181), a roller tube (15), a screening body (14) and a first and a second spring element (164, 174). The method comprises the steps of driving the screening body (14) from a fully retracted position to a fully extended position, in which the spring elements (164, 174) are tensioned to a first tension level, T.sub.1, stopping the electric motor (18) at a point at which the spring elements (164, 174) are tensioned to a second tension level, T.sub.2, above the first tension level, T.sub.1, measuring the number of revolutions, R.sub.d, of the roller tube (15) necessary to drive the screening body (14) to the said position at which the motor (18) is stopped, storing the measured number of revolutions, R.sub.d, in the data storage device, measuring the number of revolutions, R.sub.b, of the roller tube, that a release of a tension corresponding to the difference, T, between the first tension level, T.sub.1, and the second tension level, T.sub.2, will cause the roller tube (15) to move back towards the fully retracted position, storing the number of revolutions, R.sub.b, in the data storage device, and calculating and storing in the data storage device a value R=R.sub.dR.sub.b.

Methods and systems are provided for generating a predictive tachometer profile at a tachometer of a vehicle. An engine speed offset can be generated based on an engine acceleration and an accelerator pedal position rate. A predictive tachometer profile displayed at the tachometer can then be generated based on the engine speed offset and an actual engine speed.

Techniques for generating a virtual map of a facility are disclosed. A server is coupled over a network to sensors equipped on patient transport apparatuses being located in the facility. The sensors produce readings as the patient transport apparatuses move in the facility. The server is configured to receive the readings over the network and to generate the virtual map of the facility based on analysis of the readings.

A tachometer system for an aircraft landing gear. The tachometer system includes a tachometer arranged to generate a variable voltage signal in response to the rotation of a wheel of the aircraft landing gear, and a processing system arranged to output a speed signal indicative of the rotation speed of the wheel of the aircraft landing gear. The speed signal is determined from the variable voltage signal from the tachometer using a set of determined parameters. The determined parameters of the processing system are determined from the voltage levels of the variable voltage signal.