Abstract: An antenna useful in an antenna array of a man-portable buried utility locator includes a flexible bobbin made of copper foil. The bobbin has a plurality of axially spaced grooves and an axially extending gap formed therein. A layer of insulation surrounds an outer surface of the bobbin. A conductive wire is disposed in the grooves and wound around the bobbin over the layer of insulation to form a plurality of axially spaced sub-coils. A layer of copper-foil tape having an insulating backing is wound about the conductive wire and has a second gap aligned with the gap in the bobbin. A layer of a low dielectric material is wound about the copper-foil tape. The antenna provides more antenna wire surface for an equivalent coil cross-sectional area, compared to prior art antennas, thus yielding greater sensitivity. The construction of the antenna provides a series of Faraday-shielded sub-coils, which yield a greater useful antenna bandwidth by moving the inherent resonance of each coil to a higher frequency.

Abstract: The present invention relates to a HTEM system that includes a semi-rigid bucking coil and an algorithm to determine the magnetic field B from the measured signal dB/dt. The bucking coil may be positioned in a concentric coplanar manner relative to a transmitter coil and receiver coil, in order to minimize spurious signals at the receiver coil during data acquisition time. Signals gathered by the system may be further processed by a signal processing means. Moreover, measurements performed upon data generated by the system may be performed upon the entire period of a current waveform applied to the transmitter and bucking coils.

Abstract: A swing type input apparatus includes a housing, an operation knob rotatably supported by the housing, and a detecting unit detecting an angle of rotation of the knob. The detecting unit includes a circuit substrate intersecting the rotation center line of the knob, a magnetic sensor on an extension of the circuit substrate, a magnet holder driven by and rotated with the knob, a magnet held by the magnet holder such that the magnet intersects the rotation center line and is close to and faces the magnetic sensor, and a magnetic shield case which covers the magnet and the magnetic sensor and is a boxy assembly of first and second shield cases. The boundary between the first and second shield cases is positioned so as not to overlap the magnet. A bent grounding tab in the second shield case is electrically connected to a grounding conductor of a sub substrate.

Abstract: An inductive sensor with coils arranged substantially in layers on a flat circuit-carrier. The edges of the flat circuit-carrier are metallized obliquely so that an upper side, a lower side, an intermediate layer and/or a plurality of intermediate layers of the flat circuit-carrier are interconnected with one another via the edges in a conductive manner.

Abstract: A micromachined magnetic field sensor integrated with electronics is disclosed. The magnetic field sensors utilize Hall-effect sensing mechanisms to achieve 3-axis sensing. A Z axis sensor can be fabricated either on a device layer or on a conventional IC substrate with the design of conventional horizontal Hall plates. An X and Y axis sensor are constructed on the device layer. In some embodiments, a magnetic flux concentrator is applied to enhance the performance of the magnetic field sensor. In some embodiments, the magnetic field sensors are placed on slope sidewalls to achieve 3-axis magnetic sensing system. In some embodiments, a stress isolation structure is incorporated to lower the sensor offset. The conventional IC substrate and device layer are connected electrically to form a 3-axis magnetic sensing system. The magnetic field sensor can also be integrated with motion sensors that are constructed in the similar technology.

Abstract: A current sensor includes a magnetic detecting element, a bridge circuit including a plurality of resistance elements, and a feedback coil placed adjacent to the magnetic detecting element and generating a cancelling magnetic field for cancelling the induced magnetic field based on the output from the bridge circuit. The wiring patterns forming the bridge circuit are routed so as not to intersect with each other when seen in a plan view. Only the resistance elements constituting each series circuit of the bridge circuit are connected to each other by the wiring pattern in an enclosed area which encloses each resistance element constituting the bridge circuit, and the wiring pattern branched from the wiring pattern is connected to the terminal which is installed in a quantity of only one, outside the enclosed area.

Abstract: A target magnet assembly configured to be secured to a rotating shaft of a steering gear assembly. The target magnet assembly includes an index hub with a mount and a magnet secured by the mount. The mount includes a tab with a protrusion extending from the tab, a finger, and a stop. The magnet includes an axial retention groove receiving the finger, a top surface abutting the stop, and a radial retention groove receiving the protrusion.

Abstract: A method and device for measuring a signal of a die to be placed within a package is disclosed. At least one die as a Device Under Test (DUT) is mounted on a substrate and a chip-type measurement instrument is mounted on the substrate, or embedded into the substrate, wherein the instrument analyzes and/or processes the signal of the DUT and may provide stimulus signal to the DUT. The substrate having the DUT and the measurement instrument is mounted on a circuit board that has plural electrodes to be connected to the signal paths of the DUT and the instrument. An electrode is coupled to a standard interface port to provide the signal of the chip-type instrument to an external instrument.

Abstract: A rotation sensor equipped wheel support bearing assembly detects rotational speed and rotational direction, in which a high resolution rotation signal is utilized in various vehicle controls with a suppressed size. The bearing assembly includes a plurality of rows of rolling elements between rolling surfaces in outer and inner members. A magnetic field generating element having anisotropy about a bearing center axis is provided in the outer member in alignment with the axis. The inner member is provided with a sensor for sensing the magnetic field of the magnetic field generating element oriented axially. The sensor detects the angle of rotation of the magnetic field generating element and is in the form of magnetic sensor arrays or elements for detecting the orientation of the magnetic field with a two-dimensional vector sensor to detect rotation of the magnetic field generating element.

Abstract: A magnetic field detection device including a magnetic body (magnetic flux guide) provided for adjusting a magnetic field to be applied to a magneto-resistance element. A shape of an on-substrate magnetic body in plan view is a tapered shape on one end portion side and a substantially funnel shape on another end portion side opposite the one end portion, the another end portion being larger in width than the one end portion, and a magneto-resistance element is disposed in front of an output-side end portion. In the on-substrate magnetic body, a contour of a tapered portion is not linear like a funnel, but has a curved shape in which a first curved portion protruding outward with a gentle curvature and a second curved portion protruding inward with a curvature similar to that of the first curved portion are continuously formed.

Abstract: A shear wave is generated at a borehole wall. A static magnetic field is applied with a radial direction and an oscillating magnetic field is applied tangential to the borehole wall. The frequency of the oscillating field is varied until a resonance condition occurs. Motion of the formation under resonance provides an indication of a resistivity property of the earth formation.

Abstract: A rotation angle detector for detecting rotation angle of a rotator to be measured is provided. The detector includes a magnet which is fixed to the rotator to be measured and is rotated with the rotator to be measured and plural magnetic detection means respectively arranged at a prescribed angle, for detecting intensity of magnetic field generated by the magnet and outputting signals of electric charge based on the intensity of magnetic field. The detector further includes drive means for driving the plural magnetic detection means, where the drive means is capable of simultaneously changing magnetic sensitivities of the plural magnetic detection means in the same ratio. The detector further includes rotation angle calculation means for calculating rotation angle of the rotator to be measured based on signals output from the plural magnetic detection means.

Abstract: A method for programming a Hall sensor having a controller in which the Hall sensor or a programmable circuit component integrated therein is programmed by clocking or modulating a Hall sensor power supply voltage (VDD). A clocked or modulated controller power supply voltage (VBAT) is applied to the controller in clocked or modulated form; and where the clock or modulated Hall sensor power supply voltage (VDD) is applied to the Hall sensor by the controller as a function of the clocked or modulated controller power supply voltage (VBAT).

Abstract: An instrument for measuring a property of a subsurface material, the instrument including: a magnetic material surrounding a volume in at least two dimensions; and a receiver adapted for receiving energy related to the property of the subsurface material; wherein the receiver is disposed at an exterior surface of the magnetic material.

Abstract: A measuring device for determining the strength of magnet fields using a Hall probe and a method for evaluating the function of a Hall sensor. The measuring device comprises a sensor having a Hall probe and an electric diagnosis conductor which is galvanically isolated from the Hall probe. The measuring device being able to continually monitor the sensor. In particular, the sensor can not only be checked qualitatively in regard to function or failure, but also quantitatively in regard to correct calibration such that, if necessary, an immediate correction or re-calibration of the sensor can be performed. In particular, measuring errors for instance, due to a temperature drift or because of mechanical stress of the sensor, can easily be eliminated.

Abstract: Disclosed are various embodiments of methods and systems related to stimulus responsive nanoparticles. In one embodiment includes a stimulus responsive nanoparticle system, the system includes a first electrode, a second electrode, and a plurality of elongated electro-responsive nanoparticles dispersed between the first and second electrodes, the plurality of electro-responsive nanorods configured to respond to an electric field established between the first and second electrodes.

Abstract: A surgical navigation system having one or more magnetoresistance sensors, where the sensors have the noise and dynamic range appropriate for electromagnetic position and orientation tracking. The surgical navigation system comprising at least one magnetoresistance reference sensor rigidly attached to an anatomical reference of a patient, at least one magnetoresistance sensor attached to at least one device, and at least one processor for determining the position and orientation of the at least one device.

Abstract: Defects in a pipeline may be detected by an in-line inspection tool passing therethrough. However, as the tool travels through the pipeline, errors associated with certain onboard components may accumulate. These errors may reduce the accuracy with which the locations of detected defects can be determined. Accordingly, markers may be positioned at various locations along the pipeline. Each marker may include a radio receiver to receive signal transmitted by an in-line tool passing thereby and one or more magnetic flux detection systems that may detect a magnetic field emanating from the in-line tool. The radio receiver may include an antenna comprising two or more coils connected in series and positioned side-by-side. The flux detection system may include one or more flux concentrators to amplify the strength of the magnetic field.

Abstract: A portable terminal device is disclosed that includes a movable part having a display part; an arm part supporting the movable part so that the movable part is rotatable at least ±90° with reference to a rotation center position around a rotation center; and a position detection part detecting the position of the movable part relative to the arm part. The position detection part includes magnets, magnetic sensors detecting the magnetic fields thereof, and a calculation part determining the position of the movable part based on sensor outputs. The magnets are provided in one of the arm part and the movable part so as to be 90° apart from each other around the rotation center. The magnetic sensors are provided in the other one of the arm part and the movable part so as to oppose the corresponding magnets when the movable part is positioned at the rotation center position.

Abstract: A magnetic field sensor and a method associated with the magnetic field sensor provide gain correction coefficients and/or offset correction coefficients stored in the magnetic field sensor in digital form. The gain correction coefficients and/or offset correction coefficients can be used to generate analog control signals to control a sensitivity and/or an offset of an analog signal path through the magnetic field sensor.