Abstract: A connecting lead for a receiving antenna of a magnetic resonance tomograph, to a system made up of a magnetic resonance tomograph and to a receiving antenna is provided. The connecting lead includes a resonant contactless power coupler. The receiving antenna is magnetically resonantly coupled by the connecting lead to the magnetic resonance tomograph. The magnetic resonance tomograph includes an alternating current generator that may be connected to the connecting lead and is configured to supply the active amplifier element of the receiving antenna with energy.

Abstract: A calibration apparatus is configured to calibrate a magnetostrictive sensor. The magnetostrictive sensor is configured to measure an object and comprises a sensing element positioned adjacent to the object. The calibration apparatus comprises an estimation device and a calibrator. The estimation device is configured to estimate at least one of a gap between the sensing element and the object and a temperature of the object to obtain at least one of an estimated gap and an estimated temperature, based on geometric information, an excitation signal and an output signal of the magnetostrictive sensor, and geometric information of the object. The calibrator is configured to reduce an effect on the output signal of the magnetostrictive sensor imposed by variations in the at least one of the gap and the temperature, based on the at least one of the estimated gap and the estimated temperature, to obtain a calibrated output signal.

Abstract: The invention relates to methods and to circuit arrangements for localizing a fault location on an electric line based on time-domain reflectometry. The presently described methods and circuit arrangements serve for localizing an interference location, in particular an insulation fault, on an electric line by using methods of time-domain reflectometry.

Abstract: A gate driver circuit is provided. The gate driver circuit includes an isolated gate driver power supply circuit. The isolated gate driver power supply circuit includes a coreless transformer and a resonance converter coupled to the coreless transformer. A method of manufacturing an isolated gate driver power supply circuit for a gate driver circuit is also provided.

Abstract: A method of determining the capacitance and loss-factor of each of a plurality of capacitive components of an electrical power device, wherein the method includes: a) obtaining for each capacitive component a respective capacitance value and loss-factor value, and b) processing the capacitance values and the loss-factor values, wherein the processing involves removing a common influence of temperature on the capacitance values from the capacitance values and removing a common influence of temperature on the loss-factor values from the loss-factor values to obtain for each capacitive component a temperature-compensated capacitance value and a temperature-compensated loss-factor value.

Abstract: A chain sensor includes a first magnetic circuit, a device for measuring the magnetic flux density in the first magnetic circuit, and a coil. The magnetic circuit is substantially formed by a magnetically conductive yoke body. The yoke body has a lateral leg, the end of which is disposable in the proximity of a chain. The device for measuring the magnetic flux density is connected to an analysis unit. To determine the elongation of the chain during operation, a partially closed magnetic circuit is formed, a voltage is applied to a coil disposed in the magnetic circuit, an alternating magnetic flux density is generated in the magnetic circuit by the movement of the chain through the partially closed magnetic circuit, the alternating magnetic flux density in the magnetic circuit is detected as a plurality of measured values, and a length value of the chain from the measured values is determined.

Abstract: Disclosed is a “factor 1” and inductive sensor device including an LC resonant circuit powered by a suitable generator, an operational chain of units for acquisition by sampling and processing of the response signal, and a functional set of units for evaluating at least one temporarily set value of the processed signal and supplying detection or non-detection information. The acquisition and processing unit includes analog a unit for filtering and/or amplifying the sampled response signal, and a unit for compensating the temperature drift of the response signal by correcting the sampled signal following the digital conversion thereof, associated with or including a temperature sensor.

Abstract: The present invention provides a method of outputting a level of a capacitive level sensor which may be provided in a water trap of a fuel cell system and the method of outputting a level of a capacitive level sensor including a level sensor including a plurality of electrodes for measuring capacitance, and an upper electrode and a lower electrode which are able to be disposed adjacent to each other in the level sensor, including: (a) measuring a change in an output value of the lower electrode; and (b) measuring a change in an output value of the upper electrode.

Abstract: A magnetoresistance element (e.g. a spin valve) for detecting a changing magnetic field includes a pinning layer, pinned layer adjacent to the pinning layer, a spacer layer adjacent to the pinned layer, and a free layer adjacent to the spacer layer and arranged so that the spacer layer is between the pinned layer and the free layer. The pinned layer has a bias with a bias direction configured to reduce an effect of a static field on the detection of the changing magnetic field.

Abstract: A pitch compensated inductive position encoder includes a scale comprising first and second tracks including periodic patterns having a wavelength W, a detector, and signal processing. The second track pattern may be shifted along the measuring direction by a pattern offset STO relative to the first track pattern. In the detector, first-track and second-track field generating coil portions generate fields in first and second interior areas aligned with the first and second pattern tracks, respectively. First and second sensing coil configurations that are aligned with the first and second tracks, respectively, are offset relative to one another by STO+/?0.5*W along the measuring direction. In various embodiments, the first and second sensing coil configurations may have the same sequence of individual coil polarities if the generated field polarities are different, and may have inverted or opposite sequences if the generated field polarities are the same.

Abstract: Systems and methods for producing quantitative maps of a longitudinal relaxation parameter, such as a longitudinal relaxation time (“T1”), using magnetic resonance imaging (“MRI”) are described. More particularly, a pulse sequence and imaging method for cardiac phase-resolved myocardial T1 mapping are provided.

Abstract: A sensor system includes a sensor device and a cover device. The sensor device includes an external surface on which at least one electrical test contact is arranged. The cover device includes at least partially an electrically insulating material and is mechanically connected to the sensor device. The cover device is configured to cover the at least one electrical test contact of the sensor device so as to prevent contact from being made to the at least one electrical test contact from outside the sensor system.

Abstract: Disclosed embodiments include well ranging apparatus, systems, and methods which operate to receive normal components of electromagnetic field strength azimuthal measurements within a first well at different tool azimuth angles in the first well. Further activities include determining an approximate range from the sensors to a second well that serves as a source of an electromagnetic field, via direct transmission or backscatter transmission, using the normal components of the electromagnetic field strength azimuthal measurements. In some embodiments, the approximate range can be determined without introducing sensor azimuthal separation into range calculations. Additional apparatus, systems, and methods are disclosed.

Abstract: In a magnetic resonance imaging apparatus and a method for the operation thereof, a diagnostic magnetic resonance imaging sequence is selected in a control computer of the apparatus, and an adjustment parameter for the selected sequence is acquired in the control computer, which is specific to the subject under examination. A limit value for a loading parameter of the subject is specified in the computer, and a parameter range for an imaging parameter of the sequence is determined in the computer on the basis of the acquired adjustment parameter and the specified limit value for the loading parameter. A planning environment for the magnetic resonance imaging of the subject is presented, in which only the determined parameter range can be set for the imaging parameter.

Abstract: An apparatus for detecting difference in operating characteristics of a main circuit by using a replica circuit is presented. In one exemplary case, a sensed difference in operating characteristics of the two circuits is used to drive a tuning control loop to minimize the sensed difference. In another exemplary case, several replica circuits of the main circuit are used, where each is isolated from one or more operating variables that affect the operating characteristic of the main circuit. Each replica circuit can be used for sensing a different operating characteristic, or, two replica circuits can be combined to sense a same operating characteristic.

Abstract: A multichannel array coil of an MRI apparatus achieves both a wide sensitivity and low noise. An RF coil (array coil) is provided with a plurality of subcoils. Each of those subcoils is adjusted to be receivable of nuclear magnetic resonance signals, and also adjusted so that a part of current (first current) passing through one subcoil upon receipt of the signals flows into the other subcoil in the form of sub-current. A flowing direction of the first current is opposite to the flowing direction of the sub-current, and an electric field generated by the first current within a subject and an electric field generated by the first sub-current within the subject intensify each other in the space between a first loop coil unit and a second loop coil unit. Accordingly, noise correlation that is determined by an inner product of the electric fields is reduced, thereby achieving low noise.

Abstract: A system and method for generating quantitative images of a subject using a nuclear magnetic resonance system. The method includes performing a navigator module to acquire navigator data, and performing an acquisition module during free breathing of the subject to acquire NMR data from the subject that contains one or more resonant species that simultaneously produce individual NMR signals in response to the acquisition module. The above steps are repeated to acquire data from a plurality of partitions across the volume. The navigator data is analyzed to determine if the NMR data meets a predetermined condition and if not, the above steps are repeated for at least an affected partition corresponding to NMR data that did not meet the predetermined condition. The NMR data is compared to a dictionary of signal evolutions to determine quantitative values for two or more parameters of the resonant species in the volume.

Abstract: A scanning ferromagnetic resonance (FMR) measurement system is disclosed with a radio frequency (RF) probe and one or two magnetic poles mounted on a holder plate and enable a perpendicular-to-plane or in-plane magnetic field, respectively, at test locations. While the RF probe tip contacts a magnetic film on a whole wafer under test (WUT), a plurality of microwave frequencies (fR) is sequentially transmitted through the probe tip. Simultaneously, a magnetic field (HR) is applied to the contacted region thereby causing a FMR condition in the magnetic film for each pair of (HR, fR) values. RF output signals are transmitted through or reflected from the magnetic film to a RF diode and converted to voltage signals which a controller uses to determine effective anisotropy field, linewidth, damping coefficient, and/or inhomogeneous broadening for a sub-mm area. The WUT is moved to preprogrammed locations to enable multiple FMR measurements at each test location.

Abstract: A speed detection device includes a comparator module, a sensor lead with a node connected to the comparator module, and a limit set module. The limit set module is connected to the sensor lead node and to the comparator by an upper limit lead and a lower limit lead to provide upper and lower limits to the comparator that vary according to amplitude variation in voltage applied to the sensor lead.

Abstract: The present invention provides a methodology and system for resistivity tool design. By using at least one E field antenna instead of magnetic antennas, stronger signals can be captured by a smaller system. The more effective antenna design of the present invention has broad applications in various tools including geosteering, look ahead, and triaxial induction.