Abstract: A multiple rotation absolute angle detecting device includes a reduction gear mechanism having an eccentric ring fitted to a rotatable member, an internally threaded member in a stationary member, an externally threaded member engageable with the internally threaded member, and a speed reducing member to which rotation is transmitted from the externally threaded member. The externally threaded member undergoes a speed-reduced rotation at a reduction gear ratio of 1/L (L represents an arbitrarily value exceeding 1) about an axis O? of rotation of the eccentric ring and the speed reducing member rotates around the rotatable member at a speed equal to that of the externally threaded member. A multiple rotation detecting unit for outputting a sinusoidal or sawtooth wave having one period per rotation includes a to-be-detected member in the speed reducing member and a detecting member in the stationary member that confronts the to-be-detected member.

Abstract: The eddy current testing apparatus includes a probe having an eddy current testing sensor including a pair of eddy current testing coils. The apparatus also includes an eddy current testing flaw detector inputting detection signals from the eddy current testing sensor. The diameter of a magnetic core used in each of the pair of eddy current testing coils is within the range of 0.1 mm to 0.5 mm.

Abstract: A magnetic field generated by at least one coil operatively associated with a first portion of a vehicle responsive to a first signal from a signal source causes an eddy current in at least one conductive element operatively associated with or at least a part of a second portion of the vehicle. In one aspect, a circuit operatively coupled to the at least one coil generates a second signal responsive to a self-impedance of the at least one coil, wherein the second signal is at least partially in-phase with the first signal. In another aspect, a magnetic sensor is responsive to an eddy current in the at least one conductive element. In yet another aspect, the at least one conductive element comprises a metal sheet, film or coating of paramagnetic or diamagnetic material that is relatively highly conductive.

Abstract: In a multicomponent logging tool, a coil is electrically isolated by open circuiting another, substantially orthogonal coil.

Abstract: A ground conductivity meter that includes a transmitter coil and a receiver coil that are horizontally spaced apart from each other, and a conductivity meter controller connected to the transmitter and receiver coils and including an electronic storage element and at least one processor, the conductivity meter controller being operative to: determine a first conductivity reading in dependence on signals from the receiver coil when the transmitter coil and receiver coil are positioned a predetermined distance above a ground surface in one of a vertical dipole orientation or a horizontal dipole orientation; determine a second conductivity reading in dependence on signals from the receiver coil when the transmitter coil and receiver coil are positioned the predetermined distance above the ground surface in the other of the vertical dipole orientation or horizontal dipole orientation; calculate a correction factor in dependence on the first and second conductivity readings and store the correction factor in the s

Abstract: A sensor for locating metallic objects, in particular a metal sensor for building materials, includes at least one transmission coil and at least one reception conductor loop system that are inductively coupled to one another. The reception conductor loop system is made up of conductor structures on a printed circuit board. A second reception conductor loop system can be provided, which is situated coaxial to the first reception conductor loop system in a common first plane with it on the printed circuit board. The sensor preferably operates in a frequency range between 1 kHz and 10 kHz.

Abstract: A three-axis fluxgate-type circuit having three fluxgate sensors for outputting three analog voltage values respectively. A controller normalizes three digital voltage values corresponding to said three analog voltage values, select a set of linear voltage values from the three normalized digital voltage values and calculate an azimuth based on the set of linear voltage values.

Abstract: A portable self-standing electromagnetic (EM) field sensing locator system with attachments for finding and mapping buried objects such as utilities and with intuitive graphical user interface (GUI) displays. Accessories include a ground penetrating radar (GPR) system with a rotating Tx/Rx antenna assembly, a leak detection system, a multi-probe voltage mapping system, a man-portable laser-range finder system with embedded dipole beacon and other detachable accessory sensor systems are accepted for attachment to the locator system for simultaneous operation in cooperation with the basic locator system. The integration of the locator system with one or more additional devices, such as fault-finding, geophones and conductance sensors, facilitates the rapid detection and localization of many different types of buried objects.

Abstract: Inconsistencies in a reinforced resin matrix part are detected using an inductive coupling probe connected with or part of a tuned resonant circuit. An alternating magnetic field produced by the probe is coupled to the part and produces eddy currents in the part. Inconsistencies in the part result in changes in the complex impedance and/or resonance of the circuit which are detected by a network analyzer.

Abstract: An electronic shift lever assembly can select a gear position by sensing the movement of a shift lever in forward, backward, fight and left directions. The electronic shift lever assembly includes: a shift lever movable to select a gear position; a first sensor unit comprising a plurality of linear hall sensors for sensing vertical movement of the shift lever; and a second sensor unit comprising a plurality of switch hall sensors for sensing horizontal movement of the shift lever.

Abstract: A machine includes a component. The machine may also include a position-sensing system with a plurality of sensor elements that each generate a signal related to proximity of the sensor element to the component by generating the signal based at least in part on the magnetic permeability of the space adjacent the sensor element and a time-varying magnetic field generated by an electric circuit of the position-sensing system. The machine may also include one or more information-processing devices that determine a positional relationship between the component and the plurality of sensor elements based on a plurality of the signals generated by the sensor elements.

Abstract: A man-portable locator system for locating buried or otherwise inaccessible pipes, conduits, cables, wires and inserted transmitters using detector arrays and stochastic signal processing and similar techniques to analyze and display multiple target objects at differing frequencies in a layered user interface (UI). For example, the locator UI may be adapted to present a target plurality sorted by proximity of target conductor to the locator operator together with other useful information specifying the multiple objects, frequencies and changes in the subterranean landscape by means of a useful combination of graphical, numeric and acoustic representations.

Abstract: A magnetic probe includes a tubular container, the inside of which can be observed and at least one end of which is closed, a paramagnetic seed which is fixed to an end of the tubular container, and a paramagnetic colloidal particle dispersion liquid that is filled in the tubular container.

Abstract: An image stabilizer includes a driver having a coil and magnet, where a correcting lens on a moving frame is moved by the driver in a first direction perpendicular to an optical axis of a lens system and in a second direction perpendicular to the first direction and optical axis, and an optical axis of the correcting lens corresponds with the optical axis of the lens system. The coil and magnet are fixed to the moving frame and a supporting frame; the driver includes first and second coils for moving the correcting lens in the first and second directions, and a magnet applying magnetic force to those coils; and thrust generated from the first and second coils are directed in the first and second directions, each forming an angle of approximately 45° with a line connecting the optical axis of the correcting lens and the center of a lens barrel.

Abstract: A distance sensor configuration for a magnet of the levitation magnet of a magnetic levitation transport system equipped with a number of distance sensors. Each distance sensor has a distance measuring coil acted upon by an operating frequency and can be placed in an installation space on the magnet. In order to obtain reliable distance measurement values by using a distance sensor configuration of the aforementioned type, the distance measuring coil of each distance sensor is connected to a programmable module for generating an operating frequency. The distance sensor contains a location information querying device for querying an installation space-specific location information providing device in the installation space. The location information querying device is connected on the input side to the programmable module.

Abstract: Two embodiments of marine geo-electric probe methods for hydrocarbon deposits survey comprise—excitation of electromagnetic field in a surveyed medium by transmitting two rectangular current pulses therethrough, the first—during forward traveling of a probe device along a profile and the second—during backward traveling thereof,—measuring instant values of the first and second electric potential differences during the time between the pulses, wherein, the equal-zero condition of the electric potential differences along the profile is ensured,—calculating three sets of normalized electrical parameters based on difference values,—solving an inverse problem via a differential equation for the dipole source voltage in an electrochemically polarizable medium using the parameters,—producing data according to said electrical parameters, and—determining conductivity of the medium, induced-polarization factor and decay time constant of the polarization potential difference.

Abstract: A system for use when measuring a magnetostriction value of a magnetoresistive element according to one embodiment includes a mechanism for applying a first magnetic field about parallel to a substrate having one or more magnetoresistive elements, and for applying a second magnetic field about perpendicular to the substrate and about parallel to magnetoresistive layers of the elements; and a mechanism for applying a mechanical stress to the substrate during application of the magnetic fields.

Abstract: A sea electrical survey method for hydrocarbon deposits, situated under seabed not exceeding 10 meters of depth, is disclosed, comprising: providing a plurality of multi-channel bottom systems with receiving lines having at least three electrodes and capable to register electromagnetic signals, excitation devices generating a series of computer-controlled alternating-sign pulses, a horizontally positioned dipole, synchronizing the excitation devices and bottom systems, submerging the systems upon the seabed along a predetermined direction, aligning the receiving lines, moving the dipole within the survey zone, excitation of the pulses, registering signals, measuring the potentials difference and the spatial derivatives of the signals during the pulses and the pauses, recording data, analyzing the data with accounting the fields behavior in time and in space simultaneously, determining the environment resistivity and environment polarizability based on a predetermined mathematical model, and compiling the depo

Abstract: Methods and processes for determining the particle size distribution of metal catalysts are provides. Superconducting Quantum Interference Device (SQUID) magnetometer is used to evaluate the magnetic catalyst particle sizes dispersed in the support material. Dependence on variation of the metal/support material ratio, which defines the metal particle sizes, the catalyst can show paramagnetic, superparamagnetic, and ferromagnetic behaviors.

Abstract: A rotary transducer includes a shaft, and a carrier body, on which an excitation winding and a detector system are arranged. To generate an electromagnetic field, it is possible to conduct an excitation current through the excitation winding, and the detector system is suitable for scanning the electromagnetic field influenced by a code carrier. The rotary transducer additionally includes an excitation control device and an evaluation device. The code carrier is secured in a rotatably fixed manner on the shaft for detecting the angular position of the shaft.