Abstract: A position sensor for a linear actuator, a production method for a position sensor, a linear actuator with a position sensor, and a method for determining a position of a linear actuator. The position sensor has a capacitor arrangement and a data processing device. The capacitor arrangement has a first capacitor element and a second capacitor element arranged to be movable relative to the first capacitor element and designed to generate a capacitive signal. A data processing device is configured to determine the position of the second capacitor element relative to the first capacitor element based on the capacitive signal. The second capacitor element is made of an electrically conductive polymer.

Abstract: A moisture-sensitive film formed from a resin composition and containing a polyimide resin component. The polyimide resin component comprises a fluorinated polyimide resin. The polyimide resin component comprises a phthalimide ring and a benzene ring different from a benzene ring included in the phthalimide ring. Based on a total amount of the polyimide resin component, the benzene ring different from the benzene ring included in the phthalimide ring has a mass fraction W (Be) and the phthalimide ring has a mass fraction W (PhI) satisfying the following formula: W (PhI)/W (Be)?1.2.

Abstract: A position sensor includes first and second sensor components. The second sensor component has a reading unit that is configured to evaluate a capacitive signal in relation to the position of the second sensor component relative to the first sensor component. The position sensor is in addition configured to provide the result of the evaluation at an interface of the first sensor component. A method for ascertaining a position of a second sensor component of a position sensor relative to a first sensor component of the position sensor as well as a linear actuator, are provided.

Abstract: An inductive sensor device has a coil arrangement and sensor electronics for determining a longitudinal position of an at least partially electrically conductive and/or magnetically polarizable object moveable at a distance from a device end face along a device sensitive axis. The arrangement has a substantially planar exciting coil for producing an alternating magnetic field for inducing eddy currents and/or magnetic polarization in the object and a first substantially planar receiving coil substantially parallel to and overlapping the exciting coil. The coils are substantially parallel to the end face. The sensor electronics determine at least one parameter of an exciting coil electrical signal, which is variable owing to an inductive backward effect of the object, at least one parameter of a voltage inducible in the at least first receiving coil based on this effect, and the longitudinal position from the determined signal parameter and the determined voltage parameter.

Abstract: A method for calibrating a rotary encoder for capturing rotational angle position of a machine shaft. The rotary encoder includes an exciter unit which is rotationally fixed to the machine shaft, and a stationary sensor unit which interacts therewith. The method includes rotating the machine shaft to perform a rotational movement at a predefined rotational speed at a first sensor temperature, capturing a first position measured value at a first predefined rotational angle position at the first sensor temperature, heating or cooling the sensor unit to a second sensor temperature, capturing a second position measured value at the first predefined rotational angle position at the second sensor temperature, determining a first deviation between at least the second position measured value and a first desired position measured value, and correcting an output signal from the rotary encoder via the first deviation.

Abstract: A method for acquiring nuclear magnetic resonance (NMR) phase-sensitive two-dimensional (2D) J-resolved spectrum by suppressing strong coupling spurious peaks, comprising: 1) placing a sample, collecting a conventional one-dimensional (1D) spectrum of the sample, and measuring a time width (pw) of a 90° pulse, wherein the conventional 1D spectrum provides J coupling information and chemical shift information of the sample; and 2) introducing a pulse sequence for suppressing strong coupling, setting parameters of a chirp sweep frequency pulse, a pure shift yielded by chirp excitation (PSYCHE) module, and a J sampling module, and collecting and saving data of a spectrum.

Abstract: There is provided a method of installing a magnetic proximity sensor including positioning the magnetic field sensor in a desired location and positioning a magnet in a desired location relative to the magnetic field sensor, with an indicator of the sensor continuing to be turned on during the predetermined period of time when the magnetic field generated by the magnet is sensed by the magnetic field sensor, and being turned off during the predetermined period of time when the magnetic field generated by the magnet is not sensed by the magnetic field sensor. The indicator light thus assists in determining proper relative positioning of the magnet and the magnetic field sensor. If after the predetermined period of time more time is needed to install the magnetic proximity sensor, the method includes initiates another predetermined period of time by removing and replacing a lid of the magnetic proximity sensor.

Abstract: An apparatus for sensing a position of a target, in particular for offset invariant sensing of the position of the target, is described as well as a corresponding method. The apparatus comprises at least three sensor elements. At least one sensor element of the at least three sensor elements generates a first magnetic field. At least two sensor elements of the at least three sensor elements receive a second magnetic field associated with the first magnetic field. The at least two sensor elements of the at least three sensor elements form at least one sensor element pair and provide a signal indicative of the position of the target.

Abstract: A fastening device for releasably fastening a probe (1) to an NMR magnet (2). An insert part (3) fastens the probe to a retaining system (4) connected to the magnet. A force-variable connection is established by the insert part with spring elements (8). The probe fastens to the insert part with rigid retaining elements (6). When closed, a connection without mechanical play exists between the insert part and the retaining elements when the spring elements are under tension. An annular disc-shaped pretensioning element (9) is arranged between the insert part and the retaining system. By rotating the pretensioning element relative to the insert part, the pretensioning element presses on and pretensions the spring elements. When open, the spring elements and the retaining elements are configured to connect with a mechanical play of 0.5 to 5 mm between the insert part and the retaining elements when the spring elements are pretensioned.

Abstract: Novel electrically-isolated high-voltage sensors are provided which have low power dissipation. The sensors are formed of a circuit comprising first and second portions separated by an electrical isolation boundary with the first portion used for high-voltage, and the second portion for low-voltage. While they are decoupled electrically, they are coupled both optically and magnetically. The first portion comprises an LED which generates an optical signal corresponding to a high-voltage signal across the electrical-isolation boundary. The second portion comprises a photodiode which receives the optical signal emitted from the LED and outputs a corresponding low-voltage electrical signal.

Abstract: During operation, a computer system may acquire magnetic resonance (MR) signals associated with a sample from a measurement device or memory. Then, the computer system may access a predetermined set of coil magnetic field basis vectors associated with a surface surrounding the sample, where coil sensitivities of coils in the measurement device are represented by weighted superpositions of the predetermined set of coil magnetic field basis vectors using coefficients, and where the predetermined coil magnetic field basis vectors are solutions to Maxwell's equations. Next, the computer system may solve, on a voxel-by-voxel basis for voxels associated with the sample, a nonlinear optimization problem for MR information associated with the sample and the coefficients using: a forward model that uses the MR information as inputs and simulates response physics of the sample, the MR signals and the predetermined set of coil magnetic field basis vectors.

Abstract: A method of determining an angular position of a target of an inductive angular position sensor system, relative to a substrate, includes the steps of: receiving, demodulating and digitizing signals, and reducing a DC-offset of the digital signals, and determining an angular position. The step of reducing the DC-offset involves: i) initializing a DC-correction value; ii) subtracting the DC-correction value to obtain DC-shifted signals; iii) clipping the DC-shifted-signals to obtain clipped signals; iv) calculating a first sum by summing values of the clipped signal over one period, and v) calculating a second sum by summing absolute values of the clipped signal over said period; vi) adding to each DC correction value K times the first sum divided by the second sum, where K is a predefined constant.

Abstract: Systems and methods are described for the monitoring of patient motion via the detection of changes in capacitance, as measured using a capacitance position sensing electrode array. The changes in capacitance may be processed to determine a corresponding positional offset, for example, using a calibration data set relating capacitance to offset for each electrode of the array. The detected positional offset may be employed to provide feedback to a surgeon or operator of a medical device, or directly to the medical device for the control thereof. A medical procedure may be interrupted when the positional offset is detected to exceed a threshold. Alternatively, the detected positional offset may be employed to manually or automatically reconfigure a medical device to compensate for the detected change in position. Various configurations of capacitive position sensing devices are disclosed, including embodiment in incorporating capacitive sensing electrodes with a mask or other support structure.

Abstract: A magnetic resonance apparatus including: a scanner; a patient receiving region which is at least partially surrounded by the scanner; and a lighting apparatus designed to light the patient receiving region. The lighting apparatus includes at least one lighting element; and two neutralizing elements designed to at least partially neutralize a voltage that is induced by a high-frequency field of the scanner.

Abstract: In one aspect, an integrated circuit (IC) includes a magnetic-field sensor. The magnetic-field sensor includes digital circuitry that includes a first and second analog-to-digital converter (ADC). The digital circuitry is configured to receive a first and second analog output signals and, using the first and second ADC, configured to convert the first and second analog output signals to a first and second digital signals. The magnetic-field sensor also includes diagnostic circuitry configured to receive, from the digital circuitry, an input signal related to the first and/or the second digital signals and configured to provide a test signal at a pin of the IC. In response to a range parameter, the diagnostic circuitry is further configured to provide the test signal comprising a range of codes from the first and/or the second ADC corresponding to the range parameter.

Abstract: An inductive angle sensor includes an inductive target arrangement with k-fold symmetry and a first pickup coil arrangement with k-fold symmetry and a second pickup coil arrangement with k-fold symmetry. A combination apparatus is designed to combine signals of the first pickup coil arrangement with signals of the second pickup coil arrangement and, on the basis thereof, to ascertain an angle-error-compensated rotation angle. The single pickup coils of the first and second pickup coil arrangements are each rotationally offset about the axis of rotation R by a geometric offset angle ? relative to one another. Additionally, the entire first pickup coil arrangement is rotationally offset relative to the entire second pickup coil arrangement about the axis of rotation R by a geometric offset angle ?.

Abstract: An angular position sensor comprising two annular sensors, one annular sensor for generating a coarse resolution time varying signal in the presence of a rotatable inductive coupling element and the other annular sensor for generating a fine resolution time varying signal in the presence of the rotatable inductive coupling element. The rotatable inductive coupling element comprising a first annular portion comprising at least one annular conductive sector and at least one annular non-conductive sector and a second annular portion comprising at least one annular conductive sectors and at least one annular non-conductive sector, wherein the number of annular conductive sectors of the first annular portion and the second annular portion are different. In particular, the annular conductive sectors of the annular portions may comprise 50% or 75% of the total area of the annular portions.

Abstract: A scanning element includes a multilayer circuit board having a first detector unit arranged in a first layer and in a second layer. In addition, the circuit board has a second detector unit, which is arranged in a third layer and in a fourth layer, and a first shielding layer, which is arranged in a fifth layer. The circuit board moreover has a geometrical center plane, which is located between the detector units, and furthermore has vias, which are arranged at an offset from one another in a direction parallel to the center plane. The fifth layer is structured such that that a web that is electrically insulated with respect to this first shielding layer is arranged next to the first shielding layer, the web being electrically contacted with the vias and electrically connecting the vias to one another.

Abstract: An inductive position measuring device includes a scanning element and a scale element. The position measuring device is able to determine positions of the scanning element relative to the scale element in a first direction and in a second direction. The scale element includes graduation structures arranged next to one another along the first direction, and the graduation structures have a periodic characteristic with a second period length along the second direction. The scanning element has a first receiver track, a second receiver track, a third receiver track, and an excitation lead. Each of the three receiver tracks has two receiver circuit traces. The receiver circuit traces have a periodic characteristic with a first period length along the first direction, and the receiver tracks are arranged at an offset from one another in the second direction.

Abstract: A device which can be used for current measurement is described hereinafter. According to one exemplary embodiment, the device comprises the following: a coil carrier extending along a longitudinal axis having a base body which in a central region has a section having reduced cross-sectional area, which is smaller than the cross-sectional area outside the central region, and a magnetic field probe having a ferromagnetic sensor strip, which is fastened to the coil carrier in the section having reduced cross-sectional area, and having a sensor coil which is wound around the coil carrier in the central region so that it encloses the sensor strip. The device also comprises a film which at least partially covers the section having reduced cross-sectional area. A secondary winding is wound around the coil carrier, wherein the secondary winding is wound around the film in the section having reduced cross-sectional area.