Abstract: Methods and system for performing magnetic induction tomography imaging of an object are provided. An apparatus includes an array of unit cells and a control circuit coupled to the array of unit cells. The array of unit cells can generate a first magnetic field using an excitation pattern in the direction of a target object and sense a second magnetic field induced in the target object by the first magnetic field. The control circuit can determine a minimum of the first magnetic field. The minimum may correspond to a higher conductivity region of the target object. The control circuit can adjust the excitation pattern based on the higher conductivity region of the target object.

Abstract: In aspects, the present invention discloses a method of detecting a rotor fault in an electric machine using a data analysis unit. The method comprises measuring magnetic field strength along a first axis and a second axis, determining operating slip frequency of the electric machine using the measured magnetic field strength along the first axis and the second axis, determining an amplitude of the determined operating slip frequency in a first frequency spectrum and an amplitude of operating slip frequency in a second frequency spectrum, and detecting the rotor fault by comparing the amplitude of the determined operating slip frequency in the first frequency spectrum and the amplitude of operating slip frequency in the second frequency spectrum against a predetermined threshold.

Abstract: To provide an inspection device and an inspection method which are capable of detecting a disconnection defect in an organic TFT array and/or evaluating a variation in the output properties and response speed of each organic TFT element. There are provided a device and a method of optically measuring the presence or absence of the accumulation of carriers in an organic semiconductor thin film which provides a channel layer of an organic TFT element. A source and a drain in each organic TFT are short-circuited to each other, a voltage is turned on and turned off in a predetermined period between this and a gate, and images before and after application of the voltage are captured in synchronization with the predetermined period while radiating monochromatic light, to obtain a differential image.

Abstract: A method of electrical system fault detection and location determination includes measuring a baseline time domain reflectometry (TDR) waveform along a wire path of the electrical system and obtaining an operating TDR waveform along the wire path. The operating TDR waveform is compared to the baseline TDR waveform to derive a difference TDR waveform, and a difference energy is calculated utilizing the difference TDR waveform. The difference energy is monitored over time for peaks in the difference energy and potential electrical system faults are identified via the peaks in the difference energy.

Abstract: A resistivity-measuring sensor disposable within a drillstring includes a sensor body having a longitudinal axis, wherein the sensor body is separable from and disposable in the drillstring at a radially offset distance from the longitudinal axis of the drillstring. The sensor further includes a transmitting antenna disposed along a length of the sensor body, a receiving antenna disposed along a length of the sensor body, and an electronics section contained within the sensor body for generating and receiving signals to and from the transmitting and receiving antennas.

Abstract: In a method and a magnetic resonance imaging system to generate magnetic resonance image data of an object, during the acquisition of magnetic resonance raw data, different transverse magnetizations are excited in multiple sub-volumes to be depicted and used for imaging. These different transverse magnetizations are simultaneously present in at least one time interval of the measurement. Image data are reconstructed from the acquired raw data.

Abstract: A bias magnetic field sensor is disclosed. In an embodiment, a bias magnetic field sensor includes a magnetic field sensor package having a magnetic body attached to only a single side of the sensor package, wherein the magnetic body is configured to provide a magnetic field, and wherein the sensor package is configured to measure a modulation of the magnetic field by a generator object.

Abstract: In a method and control device for magnetic resonance imaging, raw magnetic resonance data are acquired from one region of an examination object by a number of magnetic resonance receiving antennas of a magnetic resonance system. Calibration values are determined that represent the sensitivity of at least one of the magnetic resonance receiving antennas. An image reconstruction is performed on the basis of the raw magnetic resonance data, taking into consideration the determined calibration values. The determination of the calibration values is frequency-dependent.

Abstract: A pre-amplifier for a magnetic resonance imaging radio-frequency coil. The pre-amplifier comprises an input matching circuit (1), an amplification circuit (2), an output matching circuit (3) and a narrow band filter (4) for filtering a magnetic resonance signal amplified through the amplification circuit (2). The present invention has the technical effect that the pre-amplifier for a magnetic resonance imaging radio-frequency coil generates a gain required by magnetic resonance imaging within a very small range near a magnetic resonance signal frequency point, but only generates a very small gain or has no amplification function completely at other frequency points, thereby significantly reducing the possibility of oscillation of the magnetic resonance imaging radio-frequency coil.

Abstract: A device for inductive position determination comprises a coil, a positional element, a scanning device for determining an inductance of the coil and an evaluation device for determining a position of the positional element in relation to the coil, based on the inductance determined. In certain embodiments, the positional element comprises a ferromagnetic and electrically insulated material.

Abstract: An apparatus and a method of determining a frequency of an AC power source that more accurately determine the frequency of the AC power source connected to a vehicle are provided. The apparatus includes a rectifier that is connected to the AC power source to rectify an AC voltage input from the AC power source, a first filter connected to an output terminal of the rectifier to filter a rectified voltage output by the rectifier and a second filter connected to the output terminal of the rectifier to filter the rectified voltage output by the rectifier. Further, a frequency determination unit configured to receive the rectified voltages that pass through the first and second filters and determine a voltage frequency of the AC power source from the rectified voltage that pass through the first filter using the rectified voltage that pass through the second filter as a frequency determination level.

Abstract: A detachable speed determining device includes an optical detecting module, an energy generating module and an energy storage module. The optical detecting module is adapted to determine axial rotational displacement of a bike component by detecting a movement of a pattern on the bike component. The energy generating module is adapted to generate energy. The energy storage module is sealed inside a housing of the detachable speed determining device in a water-resistance manner and electrically connected with the optical detecting module and the energy generating module. The optical detecting module is powered by the energy storage module, and the energy storage module is charged by the energy generating module. The detachable speed determining device further includes a bolted joint and a quick releasing handle, the bolted joint passes through an axle of the bike component, and the quick releasing handle is foldably disposed on the bolted joint.

Abstract: An embodiment of a magnetic-field sensor includes a magnetic-field sensor arrangement and a magnetic body which has, for example, a non-convex cross-sectional area with regard to a cross-sectional plane running through the magnetic body, the magnetic body having an inhomogeneous magnetization.

Abstract: A current detector includes a half-bridge configuration including first and second magnetic detection elements that are connected in series and disposed such that a magnetization direction of a magnetic pinned layer thereof is opposite to each other, and a bias magnetic field generating means for applying a bias magnetic field to the first and second magnetic detection elements. The bias magnetic field has a substantially same intensity and is formed in a direction substantially orthogonal to the magnetization direction and opposite to each other.

Abstract: A magnetic electronic device includes a first body and a second body. The first body includes a first case and a magnetic member inside the first case. The second body includes a second case and includes a magnetic sensor, a magnetism guiding member and a switch control component inside the second case. The second case is connected to the first body to be movable relative to the first body. The magnetic sensor is disposed on the magnetism guiding member, and the switch control component is electrically connected to the magnetic sensor. The magnetism guiding member guides the magnetic field caused by the magnetic member, and the magnetic sensor detects the magnetic flux caused by the magnetic member. When the magnetic flux is larger than a first value, the switch control component switches a component's switch.

Abstract: A spark detector indicates the presence of a spark by analyzing sound waves generated when an electrical spark is produced from an electrical spark generator located on an igniter rod. The spark detector includes an acoustic sensor that is in communication with the igniter rod to determine the time for the spark sound wave to travel through the igniter rod to the acoustic sensor. If a spark is not detected, the spark detector may output a signal indicating at least one of (i) the spark was not detected, (ii) to replace the electrical spark generator immediately, or (iii) replace the electrical spark generator soon such as at the next scheduled maintenance. Furthermore, the spark detector may be calibrated based on current temperature of the igniter rod based upon time of propagation of a pulse sound wave, generated by a pulse-echo generator, to reflect off an end of the igniter rod.

Abstract: A semiconductor wafer includes dielectric regions of different thicknesses, some of the dielectric regions being thinner and other ones of the dielectric regions being thicker. The semiconductor wafer further includes a stress circuit operable to stress at least one of the dielectric regions internally within the semiconductor wafer for assessing dielectric reliability. A corresponding method of internally assessing dielectric reliability of a semiconductor technology is also provided.

Abstract: An electricity meter assembly includes a meter and a module assembly. The meter includes a meter cavity, at least one electrical component within the meter cavity, and a module compartment having a module cavity. The module compartment is within the meter cavity and the meter cavity is isolated from the module cavity. The module assembly includes at least one supplemental board configured to supplement the at least one electrical component. The module assembly is removably positioned within the module cavity such that the module assembly is field-removable, and wherein the module assembly is hot pluggable with the meter.

Abstract: Provided is a magnetic absolute rotary encoder, comprising a rotation shaft, multiple rotating wheels that can rotate along the rotation shaft, multiple encoding units that correspond to the multiple rotating wheels one-to-one, and one or more permanent magnet assemblies that provide the magnetic bias to the multiple encoding units. Each encoding unit comprises a magnetically permeable encoder disc, the structure thereof enabling the magnetic permeability thereof to be different according to the different positions of the rotation shaft, and comprises multiple sensor units that comprise multiple magnetic sensors. The sensor units are used to sense the magnetic permeability of the magnetically permeable encoder disc and to output the sensor signals that characterize the relative position of the magnetically permeable encoder disc.

Abstract: A power supply monitoring apparatus includes: a plurality of power supplies that are connected in series; and a capacitor that is connected to each of positive and negative electrodes of the plurality of power supplies via a plurality of switch elements. The power supply monitoring apparatus determines states of the plurality of switch elements, using a voltage value of the capacitor that is acquired when a first switch element of the plurality of switch elements is turned on, the first switch element being connected to one of a total negative-electrode side and a total positive-electrode side of the plurality of power supplies.