Abstract: Systems and methods are described for a power aggregation system. In one implementation, a method includes a establishing a communication connection with each of multiple electric resources connected to a power grid, receiving an energy generation signal from a power grid operator, and controlling a number of the electric resources being charged by the power grid as a function of the energy generation signal.

Abstract: A substantially planar eddy-current sensor having durability enhancing pillars in an active region is provided. The pillars are distributed and sized so as to have limited effect on the sensor's performance. When the sensor is mounted on a component such that the sensor experiences forces on a top and bottom surface, the pillars bear the load reducing the load bore by the active elements (e.g., drive winding, sense elements). A sensor with redundant drive windings and/or redundant sense elements is disclosed. The redundant elements may be connected to separate electronics. Another aspect relates to providing a reference transformer for calibration of a sensor. The secondary windings of the reference transformer are connected in series with the sense elements of the sensor to be calibrated. Transimpedance measurements are made when the drive winding of the reference transformer is excited. The measurements are used to correct transimpedance measurements made when the drive winding of the sensor is excited.

Abstract: An electrochemical corrosion potential (ECP) probe assembly for monitoring ECP in a high velocity reactor line includes an airfoil shaped ECP cover that improves the streamlines over and around an ECP sensor. The airfoil shaped cover includes flow holes drilled normal to the surface of the ECP cover. As such, the direction of flow of reactor water into the ECP probe assembly is altered to reduce the flow rate internal to the ECP cover sufficiently to prevent damage to the ECP probes. To facilitate use as a retrofit component, the ECP cover may have an elliptical section that is contiguous to a circular section that conforms to the geometry of existing probe wells and probe sub-assemblies.

Abstract: An apparatus includes a sensor arrangement with a sensor chip. A magnetic field generator is configured to generate a secondary magnetic field opposing an external primary magnetic field at the sensor chip. The magnetic field generator protects the sensor arrangement against the external primary magnetic field.

Abstract: The invention relates to the field of materials science and relates to a component, which can be used, for example, for microcomponents, microsensors and microactuators. The object of the present invention is to disclose a component in which a clearly greater relative length change occurs. The object is attained through a component of a ferromagnetic shape memory material, produced by a method in which at least one sacrificial layer is applied onto a single-crystalline or biaxially textured substrate, onto which sacrificial layer an epitaxial or textured layer of a ferromagnetic shape memory material with a layer thickness of ?50 ?m is applied, subsequently the sacrificial layer is removed at least partially, and during or after the layer application a structuring at least of the ferromagnetic shape memory material is realized such that an aspect ratio is achieved in which at least one length is greater by at least a factor of 3 than the thickness of the layer or the shortest dimension of the component.

Abstract: An electronic circuit includes a plurality of sensing elements configured to generate a plurality of sensing element signals. The electronic circuit also includes a control signal generator configured to generate a plurality of control signals. The electronic circuit also includes a combining circuit. The combining circuit includes a plurality of switching circuits. Each switching circuit is configured to generate a respective switching circuit output signal being representative of either a non-inverted or an inverted respective one of the plurality of sensing element signals depending upon the first state or the second state of a respective one of the plurality of control signals. The combining circuit also includes a summing circuit coupled to receive the switching circuit output and configured to generate a summed output signal corresponding to a sum of the switching circuit output signals.

Abstract: According to one example embodiment is a time domain electromagnetic (TDEM) geophysical survey system for producing a B-field measurement, comprising: a transmitter coil; a bucking coil positioned in a substantially concentric and coplanar orientation relative to the transmitter coil; a receiver coil positioned in a substantially concentric and coplanar orientation relative to the bucking coil; an electrical current source connected to the transmitter coil and bucking coil for applying a periodic current thereto; and a data collection system configured to receive a magnetic field time-derivative signal dB/dt from the receiver coil and integrate the magnetic field time-derivative signal dB/dt to generate, a magnetic B-field measurement, the transmitter coil, bucking coil and receiver coil being positioned relative to each other such that, at the location of the receiver coil, a magnetic field generated by the bucking coil has a cancelling effect on a primary magnetic field generated by the transmitter coil.

Abstract: A sensor device for detecting the rotational position of a rotating shaft, which is rotatably mounted in a housing, comprises a transducer magnet fastened to a carrier pin, which is accommodated in a recess in the end face of the shaft.

Abstract: An inspection device that is capable of inspecting all heat-transfer-tube sealing portions in a steam generator and that is also capable of analyzing a defect shape is provided. An inspection device that employs the eddy-current flaw detection method to inspect the presence/absence of a defect in a welded portion (103) between a tube (101) and a tube plate (102) is provided with a main unit (41) that has a circular-column portion (41A), which is inserted into the tube (101), and a flange portion (41B), which is pressed against the tube plate (102), and that is rotatable with respect to the welded portion (103); a probe (42) that is disposed inside the main unit (41), that can be moved close to and away from the welded portion (103), and that detects a defect in the welded portion (103); and a pressing portion (44) that presses the probe (42) toward the welded portion.

Abstract: A device, method and system for measuring characteristics of a geologic formation using a floating reference signal having a mud chamber, an electrode disposed within the mud chamber, and an electrically conductive plate disposed within the mud chamber, the plate separated from the electrode. An alternating current source is provided on the electrode, whereby an electric field is be maintained between the electrode and the conductive plate. An opening in the mud chamber allows drilling fluids to pass there through.

Abstract: An electromagnetic field sensor assembly for blade tip clearance measurement in a gas turbine engine is disclosed that includes a ceramic sensor body, a multi-layered wire coil wound about a distal end portion of the sensor body for producing an electromagnetic field, a ceramic well enclosing the sensor body and the coil, and a metallic housing surrounding the well and having an open distal end.

Abstract: A magnetic field sensor includes a linear magnetic field sensor to produce a voltage proportional to a sensed magnetic field and an interface having only two terminals for external connections. The two terminals of the interface include a power supply terminal and a ground terminal. The interface includes a voltage-controlled current generating device that is connected between the two terminals and is controlled by the voltage to provide a current signal that is proportional to the sensed magnetic field.

Abstract: Methods and apparatuses for determining surface wetting of a rock material with changing well fluids. In general, the methods according to the invention include measuring electrical impedance spectroscopy (“EIS”) for a system simulating downhole conditions for the wetting of a surface. Methods and apparatuses for making EIS measurements model double-layer capacitance at a downhole surface in a well, from which the nature and quantification of the wetting of the surface can be inferred.

Abstract: A tow assembly for an airborne electromagnetic surveying system, including: a transmitter coil frame supporting a transmitter coil, the transmitter coil frame being formed from a plurality of serially connected frame sections forming a loop, the transmitter coil frame having rotating joints at a plurality of locations about a circumference thereof enabling the transmitter coil frame to at least partially bend at the rotating joints; and a suspension assembly for towing the transmitter coil frame behind an aircraft, the suspension assembly being attached to the circumference of the transmitter coil frame at spaced apart locations.

Abstract: In an embodiment, a method of characterizing a polycrystalline diamond compact is disclosed. The method includes providing the polycrystalline diamond compact, and measuring at least one magnetic characteristic of a component of the polycrystalline diamond compact.

Abstract: A current sensor including a magnetic detecting bridge circuit which is constituted of four magneto-resistance effect elements with a resistance value varied by application of an induced magnetic field from a current to be measured, and which has an output between two magneto-resistance effect elements. The four magneto-resistance effect elements have the same resistance change rate, and include a self-pinned type ferromagnetic fixed layer which is formed by anti-ferromagnetically coupling a first ferromagnetic film and a second ferromagnetic film via an antiparallel coupling film therebetween, a nonmagnetic intermediate layer, and a soft magnetic free layer. Magnetization directions of the ferromagnetic fixed layers of the two magneto-resistance effect elements providing the output are different from each other by 180°. The magnetic detecting bridge circuit has wiring symmetrical to a power supply point.

Abstract: A rotary encoder includes a magnet disposed on a rotational axis of the encoder. The magnet is polarized transversely to the rotational axis. A first magnetic sensor is disposed on the rotational axis proximate the on-axis magnet. A magnet ring is disposed rotationally coaxially with the rotational axis and has a selected diametric distance from the axis. The magnet ring has a plurality of alternatingly polarized magnets. A number of pole pairs in the magnet ring is selected to match an angular resolution of the first magnetic sensor. A second magnetic sensor is disposed proximate the magnet ring.

Abstract: A magnetism measuring method includes magnetizing a magnetic material with a direct current to a rotational magnetization region, performing an alternate current excitation in a direction having a component orthogonal to a direction of the direct current magnetization, and measuring a component of an alternate current magnetic field generated by an interaction with the magnetic material in a direction orthogonal to the direction of the direct current magnetization.

Abstract: The invention provides a hoof angle measuring device for use on horses. A base is configured to be held against the bottom of a horse hoof and a pivoting arm can then be aligned with the forward edge of the hoof to define the hoof angle. Without physical or electrical contact with the base or arm, an enclosed sensor detects relative angular position between the base and arm. Supporting circuitry also provided in an enclosure accepts signal voltage from the sensor and provides a protected digital display of the measured angle magnitude for the user.

Abstract: A magnetic balance type current sensor includes a magnetoresistance effect element whose resistance value changes owing to the application of an induction magnetic field from a current to be measured; a feedback coil disposed in the vicinity of the magnetoresistance effect element and generating a cancelling magnetic field cancelling out the induction magnetic field; a magnetic field detection bridge circuit including two outputs causing a voltage difference corresponding to the induction magnetic field to occur; and a magnetic shield attenuating the induction magnetic field and enhancing the cancelling magnetic field, wherein, on the basis of the current flowing through the feedback coil at the time of an equilibrium state in which the induction magnetic field and the cancelling magnetic field are cancelled out, the current to be measured is measured, wherein the feedback coil, the magnetic shield, and the magnetic field detection bridge circuit are formed on a same substrate.