Abstract: In one embodiment, a sensor arrangement for the contactless sensing of angles of rotation on a rotating part includes a disk-shaped target coupled to the rotating part. The disc-shaped target has at least one metal surface and generates at least one piece of information for ascertaining the instantaneous angle of rotation of the rotating part in connection with a coil arrangement. The coil arrangement has at least one flat detection coil. The arrangement further includes at least one measuring circuit that converts the inductance of a corresponding at least one flat detection coil into a measuring signal. The inductance changes due to eddy-current effects, as a function of the degree of overlap with the at least one metal surface of the rotating target. The arrangement further includes an evaluation and control unit that detects the measuring signal using measurement techniques and evaluates the signal for calculating the angle of rotation.

Abstract: A method for determining a sensor coil inductance of an eddy current sensor using an LC oscillator circuit includes determining the sensor coil inductance via integration, as a function of an oscillation frequency and a resonance capacitance of the LC oscillator circuit. The method further includes detuning, at least once, the oscillation frequency during the integration.

Abstract: An angular position sensor includes a stator element with at least three coils, a rotor element rotatably mounted with respect to the stator element, and an evaluation unit configured to determine an angle of rotation between the rotor element and stator element. The rotor element is configured to inductively couple with each of the at least three coils with varying strengths based on the angle of rotation. The evaluation unit is further configured to supply the coils with alternating voltage in a cyclical manner and in sequence, so that a first respective part of the coils is supplied with alternating voltage and a remaining part is de-energized. The evaluation unit is additionally configured, in a cyclical manner in sequence with one or more de-energized coils, to detect at least one of a respective phase and an amount of an induced alternating voltage, and to determine the angle of rotation therefrom.

Abstract: A linear travel measurement apparatus is configured for a compression travel of an electrically conductive spring. A spring unit includes the linear travel measurement apparatus and a spring. The spring has an electrical contact at each of its ends and is electrically connected to a measurement circuit by corresponding electrical lines as measurement inductance. The measurement circuit detects a change in the measurement inductance, the change caused by the compression travel, and evaluates said change in order to ascertain the spring travel.

Abstract: A sensor device for ascertaining at least one rotation characteristic of a rotating element is provided. The sensor device includes at least one trigger wheel which is able to be connected to the rotating element. The rotating element and the trigger wheel have an axis of rotation. The sensor device includes at least one coil array. The coil array encompasses at least one excitation coil and at least one receiver coil. The coil array is situated on at least one circuit carrier. The trigger wheel as a trigger wheel profile. The sensor device is designed to ascertain a change in an inductive coupling between the excitation coil and the receiver coil as a function of a position of the trigger wheel. The circuit carrier is situated coaxially with the axis of rotation of the trigger wheel. The circuit carrier surrounds the trigger wheel at least partially in a circular manner.

Abstract: A mirror system including a mirror that is mounted in a manner that permits oscillation, having a coil and at least one first spring that intercouples the mirror and the coil in a way that allows the coil to be placed as a counterweight to the oscillating mirror. Also a corresponding projection device.

Abstract: A method for determining an injection process of an injection appliance includes injecting a fluid with the injection appliance and applying an electrical signal to at least one helical spring of the injection appliance coupled to a dosing wheel of the injection appliance. The method also comprises detecting an inductance value of the at least one helical spring. A number of windings of the at least one helical spring is dependent on a set rotation angle of the dosing wheel. The set rotation angle corresponds to a dose quantity of the fluid that is preselected for the injection process. The method moreover includes making available a determination signal representing the determined injection process, using the detected inductance value.

Abstract: In one embodiment, a sensor arrangement for the contactless sensing of angles of rotation on a rotating part includes a disk-shaped target, a coil arrangement, and an evaluation and control unit. The disc-shaped target is coupled to the rotating part and includes at least two metal surfaces that influence the inductances in the flat detection coils due to eddy current effects as a function of the degree of overlap. The disc-shaped target can generate at least one piece of information for ascertaining the instantaneous angle of rotation of the rotating part, in connection with the coil arrangement. The coil arrangement has has three flat detection coils uniformly distributed on the circumference of a circle. The evaluation and control unit can generate essentially sinusoidal evaluation signals which represent the changes in inductance of the detection coils and can evaluate them for calculating the angle of rotation.

Abstract: A sensor device for ascertaining at least one rotation characteristic of a rotating element is provided. The sensor device includes at least one trigger wheel which is able to be connected to the rotating element. The rotating element and the trigger wheel have an axis of rotation. The sensor device includes at least one coil array. The coil array encompasses at least one excitation coil and at least one receiver coil. The coil array is situated on at least one circuit carrier. The trigger wheel as a trigger wheel profile. The sensor device is designed to ascertain a change in an inductive coupling between the excitation coil and the receiver coil as a function of a position of the trigger wheel. The circuit carrier is situated coaxially with the axis of rotation of the trigger wheel. The circuit carrier surrounds the trigger wheel at least partially in a circular manner.

Abstract: A linear travel measurement apparatus for a compression travel of a telescopic spring unit includes an electrically conductive spring. A telescopic spring unit includes a linear travel measurement apparatus of this kind. The spring is configured to form a measurement inductance, which is dependent on an effective length of the spring. The spring has a respective electrical contact at each of its ends and is connected to a measurement capacitance and to an evaluation and control unit by corresponding electrical connections. The measurement inductance forms an electrical LC resonant circuit with the measurement capacitance, the evaluation and control unit are configured to measure the resonant frequency of said LC resonant circuit, and the resonant frequency is given as a function of the compression travel.

Abstract: A linear travel measurement apparatus is configured for a compression travel of an electrically conductive spring. A spring unit includes the linear travel measurement apparatus and a spring. The spring has an electrical contact at each of its ends and is electrically connected to a measurement circuit by corresponding electrical lines as measurement inductance. The measurement circuit detects a change in the measurement inductance, the change caused by the compression travel, and evaluates said change in order to ascertain the spring travel.

Abstract: The invention relates to a method for detecting anomalies in a battery cell (22), wherein a short-circuit sensor system (20) detects events (44) in a signal of a terminal voltage of the battery cell, which events have successive edges in an interval of time of microseconds, and wherein events detected by the short-circuit sensor system are transmitted to a battery management system (16) which determines anomalies in the battery cells using the detected events. A short-circuit sensor system (20) and a battery system (12) which are set up to carry out the method are also stated.

Abstract: An air spring device for a vehicle includes a cover element, base element, spring-elastic sleeve, and distance sensor unit. The sleeve, together with the cover and base elements, defines an internal space, and includes a first section forming a first spring element having a first length and first spring constant and a second section forming a second spring element having a second length and second spring constant. The distance sensor unit is positioned in the internal space, is configured to determine a distance between the cover element and base element, and includes a measured value encoder and measured value pickup. A first of the encoder and pickup is positioned on the cover or base element. A second of the encoder and pickup is coupled to the cover element via the first spring element and to the base element via the second spring element.

Abstract: A mirror system including a mirror that is mounted in a manner that permits oscillation, having a coil and at least one first spring that intercouples the mirror and the coil in a way that allows the coil to be placed as a counterweight to the oscillating mirror. Also a corresponding projection device.

Abstract: A method for producing a multi-layer electrode system includes providing a carrier substrate having a recess in a top side of the carrier substrate. At least one wall of the recess is inclined in relation to a bottom side of the carrier substrate, which is opposite to the top side. The method also includes applying a multi-layer stack, which includes at least a first electrode layer, a second electrode layer, and a piezoelectric layer arranged between the first electrode layer and the second electrode layer, to the top side of the carrier substrate. At least the wall and a bottom of the recess are covered by at least a portion of the multi-layer stack.

Abstract: A sensor arrangement for sensing a rotation angle on a rotating component in a vehicle includes a first measurement transmitter. The first measurement transmitter is coupled at a periphery with a predefined first transmission ratio to the rotating component. The sensor arrangement includes a second measurement transmitter coupled at the periphery with a predefined second transmission ratio to the rotating component. The first and second measurement transmitters are mounted on a common axis of rotation. The first and second measurement transmitters generate, in conjunction with a corresponding first and second to measurement recorder, data configured to determine the current rotation angle of the rotating component.

Abstract: A mobile microprojector is provided to include at least one deflectable micromirror for scanning a projection surface with the aid of a light beam, as well as a control unit for controlling the movements of the micromirror, the control unit being configured to effectuate at least one deflection of the micromirror via a first amplitude in a first operating state for scanning the projection surface. The control unit is configured to effectuate the deflection of the micromirror via a second amplitude in a second operating state, the second amplitude being smaller than the first amplitude.

Abstract: An electrostatically actuated micro-mechanical switching device with movable elements formed in the bulk of a substrate for closing and releasing at least one Ohmic contact by a horizontal movement of the movable elements in a plane of the substrate. The switching device has a drive with comb-shaped electrodes including fixed driving electrodes and movable electrodes. A movable push rod is mechanically connected with the movable electrodes, extends through the electrodes, has a movable contact element at one side, and at least one restoring spring. A signal line has two parts interrupted by a gap. The micro-mechanical switching device is in shunt-configuration with low loss, high isolation in a wide frequency range, low switching time at low actuation voltage and sufficient reliability. The line impedance of the signal line and its variation is as small as possible. The switching device is in shunt-configuration for closing and releasing the Ohmic contact between a ground line and the signal line.

Abstract: An electrostatically actuated micro-mechanical switching device with movable elements formed in the bulk of a substrate for closing and releasing at least one Ohmic contact by a horizontal movement of the movable elements in a plane of the substrate. The switching device has a drive with comb-shaped electrodes including fixed driving electrodes and movable electrodes. A movable push rod is mechanically connected with the movable electrodes, extends through the electrodes, has a movable contact element at one side, and at least one restoring spring. A signal line has two parts interrupted by a gap. The micro-mechanical switching device is in shunt-configuration with low loss, high isolation in a wide frequency range, low switching time at low actuation voltage and sufficient reliability. The line impedance of the signal line and its variation is as small as possible. The switching device is in shunt-configuration for closing and releasing the Ohmic contact between a ground line and the signal line.