Abstract: An object of the present invention is to enhance detection accuracy of a magnetic sensor having four bridge-connected magnetic sensing elements. A magnetic sensor includes magnetic layers 41-43 provided on a surface of the sensor substrate 20 and bridge-connected magnetic sensing elements R1-R4. The magnetic layer 41 includes a main area M1 and a converging area S1 having a width gradually reduced with increasing distance from the main area M1, the magnetic layer 42 includes a main area M2 and converging areas S5, S7 each having a width gradually reduced with increasing distance from the main area M2, and the magnetic layer 43 includes a main area M3 and converging areas S6, S8 each having a width gradually reduced with increasing distance from the main area M3. The end portions of the converging areas S1-S4 and the end portions of the converging areas S5-S8 face each other, respectively, through gaps G1-G4, respectively.

Abstract: A characteristic detection apparatus includes: a characteristic detector that detects an electrical characteristic of an electronic component placed on a substrate; and a pressing member that is provided separately from the characteristic detector, and generates a pressing force to press the characteristic detector to the substrate, causing the characteristic detector to be electrically connected to the electronic component.

Abstract: A sensor assembly for a downhole tool including a tool body and a movable component movably positionable about the tool body is disclosed. The sensor assembly may include a wear sensor and/or a position sensor. The wear sensor may include a core with conductors at various depths to send a signal, whereby, upon wear of the core, a change in the signal at the depth of the wear is detectable. The position sensor may be carried by the movable component, and may be used with references comprising magnets distributed about the tool body. The position sensor includes magnets having polarity responsive to polarity of the references whereby a position of the movable component is determined. The sensor assembly may also include a chassis housing electronics coupled to the position sensor and/or the wear sensor.

Abstract: A resistive gas sensor is provided. The resistive gas sensor includes a sensing circuit and a determination circuit. The sensing circuit senses a gas to generate a detection signal. The determination circuit performs a frequency-division operation on the detection signal by a frequency-division parameter to generate a frequency-division signal, counts a half of a period of the frequency-division signal to generate a half-period count value, and determines concentration of the gas according to the half-period count value. The determination circuit determines the frequency-division parameter according to the half-period count value.

Abstract: In an object of the present invention, an object is to provide a technique for achieving higher accuracy in current detection of a radio frequency current, in a current detection device. The current detection device of the present invention includes two or more conductors through which a current shunted from a same conductor flows; conductors through which the shunted current flows have portions opposed to each other; currents flow in opposite directions in opposing portions of the conductors; and a magnetic field detecting element is provided between the opposing portions of the conductors.

Abstract: A magnetic resonance imaging apparatus according to an embodiment includes a transmission channel, a first phase shifter, and a second phase shifter. The transmission channel is configured to arrange, in at least a partial section between a generator and a transmitter coil, radio frequency (RF) pulse signals to be transmitted parallel to one another via a plurality of channels. The first phase shifter is configured to shift at least one of phases of the RF pulse signals to be transmitted via the channels, so that the phases of the RF pulse signals are in a relationship of being different from one another. The second phase shifter is configured to shift, in accordance with a phase amount shifted by the first phase shifter, at least one of phases of the RF pulse signals at a stage prior to inputting the RE pulse signals to the transmitter coil.

Abstract: Data analysis for structural health monitoring relating to a method of modal identification for structures with non-proportional damping based on extended sparse component analysis. Hilbert transform constructs analytical signal of acceleration response. Analytical signal is transformed into time-frequency domain using short-time-Fourier transform. The criterion is taken as the correlation coefficient of adjacent frequency points is close to 1. Points contributed by only one mode are detected from the time-frequency plane. Phases calculated at single-source-points are used to remove local outliers through local outlier factor method. Amplitudes of complex-valued mode shapes are estimated by Hierarchical clustering of amplitudes for time-frequency coefficients at single-source-points. Averaged phases of grouped single-source-points are estimated phases of complex-valued mode shapes. Finally, complex-valued mode shapes are acquired. Modal responses are estimated by sparse reconstruction method.

Abstract: A magnetic field sensor is described comprising at least three magnetic flux concentrator sections integrated on a planar substrate, each section being adjacent to at least one of the other sections and being separated by gaps. The sensor comprises at least a first sensing element positioned for sensing flux density in or near the gap between a first section and a second section and at least a second sensing element positioned for sensing flux density in or near the gap between the first section and at least a further section. The magnetic field sensor further comprises further sensing elements arranged to measure changes of the magnetic field in the direction perpendicular to the substrate.

Abstract: Described here are systems and methods for using a magnetic resonance imaging (“MRI”) system to estimate parameters of spectral profiles contained in multispectral data acquired using multispectral imaging (“MSI”) techniques, such as MAVRIC. These spectral profile parameters are reliably extracted using an iterative perturbation theory technique and utilized in a number of different applications, including fat suppression, artifact correction, and providing accelerated data acquisitions.

Abstract: In one embodiment, there is a test switch signal analyzer comprising: an analyzer hub operably couplable to a test switch base that includes a plurality of test switch conductors; at least one signal probe operatively couplable to the analyzer hub and to at least one of the plurality of test switch conductors when the analyzer hub is coupled to the test switch base, each of the at least one signal probes being configured to receive electrical signals from one of the plurality of test switch conductors and to generate one or more probe signals that corresponds to the received electrical signals; a signal processing unit coupled to the analyzer hub and configured to receive the one or more probe signals from the at least one signal probe, the signal processing unit configured to determine a plurality of electrical signal values based on the probe signals received from the at least one signal probe; the signal processing unit, the analyzer hub, and at least a portion of the at least one signal probe being positi

Abstract: A current sensor includes first and second bus bars aligned and arranged in such a manner to be spaced from each other in a plate width direction, a third bus bar arranged in such a manner that a plate thickness direction thereof coincides with a plate thickness direction of the first and second bus bars and a length direction thereof is orthogonal to a length direction of the first and second bus bars, first and second magnetic detection elements arranged opposite the first and second bus bars respectively in the plate thickness direction, and a third magnetic detection element arranged opposite the third bus bar in the plate thickness direction. The first and second magnetic detection elements are gradient detection type magnetic detection elements and are arranged in such a manner that a detection axis direction thereof is perpendicular to the length direction of the first and second bus bars and is tilted with respect to the plate thickness direction of the first and second bus bars.

Abstract: A system for tracking a below-ground transmitter from an aerial receiver. The receiver has an antenna assembly, a processor, and a propulsion system. The antenna assembly detects the magnetic field from an underground transmitter and generates an antenna signal. The processor is programmed to receive the antenna signal and generate a command signal, which moves the receiver to a position above the transmitter. Once in the desired position, which may be a reference plane at a fixed elevation, the antenna assembly measures the magnetic field to determine the location of the drill bit along borepath.

Abstract: A current sensor includes three bus bars arranged in such a manner to be spaced and aligned in a width direction thereof. A first shield plate and a second shield plate, which are made of a magnetic material, are arranged in such a manner to sandwich the three bus bars therebetween together in a thickness direction perpendicular to the width direction. Three magnetic detection elements are arranged between the three bus bars respectively and the first shield plate to detect a magnetic field strength generated by currents flowing through the corresponding bus bars. A conductive plate is disposed between each of the magnetic detection elements and the first shield plate. The conductive plate is disposed in such a manner to sandwich the three bus bars together between the conductive plate and the second shield plate. The conductive plate is made of a nonmagnetic conductive material.

Abstract: A magnetic tunnel junction (MTJ) based sensor device includes a MTJ element and processing circuitry. The MTJ element includes a free layer, a pinned layer, an elastic layer, and a tunnel barrier. The free layer is spaced apart from the pinned layer by the tunnel barrier and the elastic layer. The processing circuitry is configured to measure a resistance at the MTJ element and determine whether mechanical shock and vibration has occurred based on the resistance at the MTJ element.

Abstract: A system is disclosed, comprising a base and at least a first moveable entity, the first moveable entity being moveable with respect to the base and positionable in at least a first position with respect to the base. The base comprises a first base electrode and a second base electrode, and the movable entity comprises a first moveable entity electrode and a second moveable entity electrode. The electrodes are arranged such that when the moveable entity is in the first position the first base electrode and the first moveable entity electrode align to form a first capacitor and the second base electrode and second moveable entity electrode align to form a second capacitor.

Abstract: The inspection jig includes a rigid substrate, a flexible substrate connected to the rigid substrate, a support for supporting a part of the flexible substrate in a state that the part of the flexible substrate is protruded with respect to the rigid substrate, and a stretchable contactor provided on a protruding portion of the flexible substrate.

Abstract: Embodiments of the present invention provide a motion monitoring method during MR imaging, comprising: acquiring a noise of a receiving coil before or after each imaging repetition time of an imaging scanning sequence; determining main coil channels associated with a motion of a scanned object in the receiving coil; determining a sum of squares of amplitudes of noises of the respective main coil channels; and filtering the sum of squares of amplitudes of noises of the main coil channels to obtain a motion track of the scanned object.

Abstract: A sensor for inductively measuring the current in a conductor flowing through a recess in a printed circuit board. Wire loops on the printed circuit board function as the inductive current sensor. Combined with a voltage measurement, the energy being dissipated in the conductor's load circuit can be determined and transmitted wirelessly. Control circuits can be integrated with the metering hardware to enable the remote modulation of the load's power. The inductive sensor(s) can be used to track differences between the load's supply and return currents. If a fault is detected, the circuit can be broken for safety, serving a ground fault circuit interruption (GFCI) purpose. The claimed invention can report measurements in real time, providing time series data for analyses sufficient to detect or identify an anomaly in the function and operation within a system's load or electrical power distribution network.

Abstract: At least one aspect of the disclosure is directed to a power conversion unit (PCU). The PCU includes a power converter circuit, a safety detection circuit including a plurality of known network impedances and a switch having a first end coupled between two of the plurality of network impedances and a second end coupled to an output terminal, and a controller communicatively coupled to the safety detection circuit and the at least one power converter circuit. The controller may be configured to operate the switch, determine one or more voltage values of the safety detection circuit, and calculate an insulation impedance based at least in part on the one or more voltage values, a position of the switch, and the plurality of known network impedances.

Abstract: The invention relates to a method for sensing lightning-current parameters at installations comprising a plurality of capturing devices and lightning-current diversion paths, in particular for exposed and/or tall buildings, including wind turbines, by using a plurality of sensors on the lightning-current diversion paths to identify a lightning-current event, and comprising subsequent evaluation of the lightning-current event and the effect of the lightning-current event on the particular installation. According to the invention, a lightning-current detection sensor is formed on each of the capturing devices or each lightning-current diversion path, which lightning-current detection sensor provides a yes/no statement concerning a lightning-current event with respect to the particular capturing device or the particular lightning-current diversion path.