Abstract: Methods and systems for detecting an angular position of an electric motor are disclosed, including sending an electrical pulse through a stator coil of the electric motor, determining an approximate angular position of a rotor of the electric motor in response to detecting an timing of a returning electrical pulse from the stator coil, the timing of the returning electrical pulse being indicative of the angular position of the rotor; and determining an accurate position of the rotor in response to sensing a transition of a digital sensor in response to the rotor rotating relative to the stator, the transition being indicative of the accurate position.

Abstract: An electromagnetic tracking method includes generating an electromagnetic field (14) in a region of interest (16). The electromagnetic field is subject to distortion in response to a presence of metal artifacts proximate the electromagnetic field. An array of reference sensors (30,50,102,104,110) having a predefined known configuration are disposed proximate the region of interest. A first set of locations of the array of reference sensors is determined with respect to the electromagnetic field generator (12) in response to an excitation of one or more of the reference sensors via the electromagnetic field. A second mechanism (28), other than the electromagnetic field, determines a first portion of a second set of locations of at least one or more sensors of the array of reference sensors with respect to the second mechanism, the second mechanism being in a known spatial relationship with the electromagnetic field generator.

Abstract: A persistent-mode magnet, assembled from superconducting annuli, provides a micro coil NMR, in which compactness and manufacturability are provided for a variety of applications. An annular magnet for micro NMR can include a YBCO-annulus Helmholtz coil, for example, that can energized by a magnet system and then transported for use at a second location with an operating system.

Abstract: A method for calibrating a medical system capable of generating a magnetic field for tracking a position of a medical device has various steps such as defining a mapping volume within the generated magnetic field and placing a metallic object within the mapping volume. A sensor is aligned at a first point within the mapping volume and the magnetic field at the first point is measured with the sensor to establish a first coordinate position (Xi, Yi, Zi). An interpolation technique in one embodiment and an extrapolation technique in another embodiment are used in the calibration method.

Abstract: Provided is a method of using a rotational movement amount of a mobile device including obtaining images at two different points on a path along which the mobile device moves, searching for matching points with respect to the obtained images and obtaining an image coordinate value of each of the matching points, sensing linear movement of the mobile device and obtaining a linear movement amount using a result of sensing, and obtaining the rotational movement amount using the image coordinate values and the linear movement amount.

Abstract: A composite having a stack of a repeating pattern of layers of: a layer of a nonconductive magnetic material, a first layer of a dielectric material; a layer of a semiconducting material; and a second layer of the dielectric material. The composite has a magnetic resonance frequency and a magnetic anti-resonance frequency and a plasma frequency at higher frequencies than the magnetic resonance frequency.

Abstract: A magnetizing coil generates a magnetic field to magnetize a magnet in a magnetizing area, in which a direction of the magnetic field is generally parallel to a magnetization direction of the magnet. A magnetizing yoke holds the magnet and is made of a magnetic material, which exhibits a magnetic potential that is generally equal to a magnetic potential of the magnet in the magnetic field at time of magnetizing the magnet. The magnetizing yoke and the magnet substantially fill a projected area of the magnet in the magnetizing area on each of first and second sides of the magnet that are opposite from each other in the magnetization direction of the magnet in the magnetizing area.

Abstract: A composite sealed vessel is provided. The vessel includes a non-metallic, generally cylindrical inner containment piece, a non-metallic, generally cylindrical outer containment piece disposed around the inner containment piece. A pair of non-metallic flanges are disposed at ends of the inner and outer containment pieces to form a closed structure defining a cavity therein. The vessel also includes a metallic external lining disposed over the closed structure to form a leak-tight pressure boundary.

Abstract: A method for controlling an operating mode of a portable electronic device having a first plane and a second plane connected together comprises forming a magnet in the first plane, forming a magnetic flux sensor in a position of the second plane corresponding to the magnet for sensing magnetic flux, and controlling the operating mode of the portable electronic device according to the sensing result of the magnetic flux sensor.

Abstract: A system and method using a touch probe device for eddy current inspection. The touch probe provides a simple approach for coming within close contact of the specimen while maintaining a normal angle and pressure at the right positions. The use of the touch probe further reduces the total time for the eddy current inspection. The touch probe aligns the probe to a specimen to be inspected, for the purpose of reducing measurement errors and increasing productivity.

Abstract: A roof sensor for a vehicle is provided. A sensor is mounted in proximity to the roof of the vehicle for monitoring the deformation of the roof caused by impact during a crash, particularly when the vehicle rolls over. A vehicle safety system is also provided. A sensor, mounted in proximity to the roof of a vehicle, monitors the deformation of the roof. A controller is connected to the sensor, a safety device, and a vehicle communication device. Based on the severity of the deformation of the roof caused by an impact, the controller activates the safety device to prevent injury to vehicle passengers and communicates the status of the vehicle to a third party such as emergency services.

Abstract: A device for the detection of an unauthorised liquid or solid substance in a zone with protected access. The device includes a support base designed to receive a single foot, wearing a shoe of an individual to be checked, an electromagnetic field emitter/receptor operating at least at several frequencies in a specified range of frequencies, a position marker, on the support base, designed to impose a precise positioning of the foot wearing the shoe in relation to the emitter/receptor. The complex impedance is measured of the emitter/receptor influenced by a load which consists of the shoe and its contents, representing the complex dielectric characteristics of the shoe and of its contents. A mechanism is provided for supplying information associated with the measured complex impedance and therefore with the nature of the contents of the said shoe of the individual to be checked.

Abstract: The coin sorting system includes a feed unit (A), a sorting unit (B), and a passageway member (P). Each unit (A; B) has a rotary disc (2; 4) and a stationary member (1; 3) opposed to the disc. Each disc (2; 4) has a rotating axis inclined relative to a horizontal plane. A guide passageway (10) with an outlet (19a) thorough which coins are fed one by one as the disc (2) rotates is formed on the stationary member (1) of the feed unit (A). Provided on the stationary member (3) of the sorting unit (B) are a conveying passageway (32) with an inlet (34) thorough which the coins fed from the outlet (19a) are introduced one by one and multiple sorting devices (6a, 6b; 5a to 5e) each for selectively ejecting the coins. A rolling-coin passageway (7) is formed on the passageway member (P) extending aslope to cause the coins to roll from the outlet (19a) to the inlet (34) under own weight thereof.

Abstract: Methods and systems for a universally applicable, linear, signal processing framework for optimal detection, localization, and feature extraction of dipolar magnetic and electromagnetic (EM) targets. Such methods and systems provide the ability to, for example, simultaneously and optimally solve the problems of detection, localization and estimation of the dipole vector or target response matrix; be applicable to different types of magnetic or EMI sensor system; and be applicable to arbitrary combinations of sensor locations and orientations, and arbitrary spatial sampling. Such functionality is provided, in various aspects of the disclosure, with a quadrature matched filter algorithm for detecting and imaging magnetic dipoles to the more complex realm of single- and multi-channel EMI sensors.

Abstract: System and methods for monitoring electric machines are provided. A magnetic field associated with the electric machine is measured at one or more points external to the electric machine, wherein a respective magnetic field value is associated with each of the one or more points. The one or more measured magnetic field values are compared to one or more corresponding expected values, and a determination of whether a fault is present in the electric machine is made based at least in part on the comparison.

Abstract: This invention relates to a non-destructive testing device comprising a testing box (2) connected to a measurement module (10). This device also comprises a communication port (12) that simultaneously controls the testing box (2) through an external data processing device (20), the electrical power supply of said box (2) and the transfer of measurement data originating from said measurement module (10) to the external data processing device (20).

Abstract: The present invention relates to detecting breakage of a shaft of a turbomachine, in particular of the aviation type. The invention relates in particular to a device designed to perform such detection. According to the invention, the device for detecting breakage of a turbomachine shaft comprises: a shaft having an upstream end and a downstream end; a rod having an upstream end and a downstream end, and placed coaxially inside the shaft, the downstream end of the rod being securely fastened to the downstream end of the shaft and the upstream end of the rod being free to rotate relative to the upstream and of the shaft; and a sensor suitable for detecting a difference in speed of rotation between the upstream end of the rod and the upstream end of the shaft.

Abstract: The present invention generally relates to the field of biomolecule detection. More specifically, the present invention relates to compositions, methods and systems for the detection and manipulation of biomolecules using magnetic particles.

Abstract: A transmission includes first and second transmission shafts arranged parallel to each other and rotatably supported in a casing, plural gear trains arranged between the first and second transmission shafts, each gear train including a drive gear and a driven gear engaging with each other, the first and second transmission shafts transmitting power therebetween by means of one of the gear trains, a magnetic sensor device including a magnetic portion generating a magnetic field and a detection portion detecting a change of the magnetic field generated by the magnetic portion, a lubricant supply pump for suctioning a lubricant stored at a bottom portion in the casing and for sending the lubricant suctioned, and a lubricant supply pipe for ejecting the lubricant sent from the lubricant supply pump to the magnetic portion exposed within the casing.

Abstract: “The application relates to a method and device for measuring the propagation time of capacitive or inductive fields.

Abstract: An oocyte recording chamber for electrophysiological measurements. The recording chamber includes a base and a cover attached to the base. The cover and the base define a chamber having a size sufficient to accommodate an oocyte. The recording chamber includes a first electrode and a second electrode that are positioned so that the tips of the electrodes penetrate the membrane of the oocyte when the cover is fastened to the base. The recording chamber also includes a third electrode and a fourth electrode exposed to the chamber and used as ground electrodes.

Abstract: A voltage integrator, comprising a resistor (4) and a capacitor (5) connected in series between an input voltage (V) and ground, wherein the resistance (R) of said resistor and the capacitance (C) of said capacitor are adapted such that a voltage (Vc) across said capacitor approximates the integral of said input voltage (V). Means are provided for preventing said capacitor voltage (Vc) from falling below a lower limit, preferably zero, thereby ensuring automatic initialization of the integrator after each integration cycle.

Abstract: Wheel assembly with a tire pressure monitoring system includes a wheel rim, a tire mounted thereon, a housing having an interior in flow communication with the tire interior such that the same pressure prevails in the tire and in the housing interior, a magnet arranged in the housing and movable in an axial direction of the tire, a Hall effect sensor arranged on a non-rotating part of the vehicle in a position in which it is in a magnetic field generated by the magnet during rotation of the tire relative to the non-rotating part, and a spring arranged to move the magnet in dependence on pressure in the housing interior. The spring is arranged outside of the magnet. The Hall effect sensor senses magnetic field density of the magnet as the magnet rotates which is convertible into an indication of the pressure in the housing and thus the tire pressure.

Abstract: A system and method is disclosed to the elimination of cross talk between inductive loop detector units in a security system. The system includes appropriate devices for assigning different operational frequencies of each loop detector circuit to avoid cross talk. In a further aspect it provides a system and method for determining actual operational frequencies of various loop detector circuits in a security system and for changing the resonant frequencies to eliminate cross talk.

Abstract: Systems and methods for placing RFID tags on objects are shown and described. The method includes scanning an object and analyzing one or more reflected signals from the to determine a suggested location for placement of an RFID tag. The scan can be accomplished using a scanning device having an antenna that operates in the near field of the object to measure at least one RF property of the reflected signal from the object.

Abstract: Local features such as cracks in materials are nondestructively characterized by measuring a response with an electromagnetic sensor and converting this response into a selected property using a database. The database is generated prior to data acquisition by using a model to generate a baseline response or field distribution for the sensor and combining these results with another model, which may be simpler than the first model or provide a local representation of the field perturbations around a feature, which is evaluated multiple times over a range of values of the selected property. In addition, the presence of a feature may be detected by converting the sensor response into a reference parameter, such as a lift-off factor that reflects the sensor position relative to a material edge, and using this parameter to determine a reference response that can be compared to the measured response.

Abstract: A magnetic field sensor is provided alongside a roadway in order to detect vehicles.

Abstract: The present invention provides a method of determining a current in a conductor. The method comprises the steps of determining the nth spatial derivative of at least one vector component of the magnetic field associated with the current at at least one position and calculating the current from the nth spatial derivative. The present invention also provides an apparatus for determining a current in a conductor. The apparatus comprises a means for determining at least one vector component of the magnetic field associated with the current at at least two different positions and a means for determining the nth spatial derivative of at least one vector component of the magnetic field from the or each vector component of the magnetic field measured at the at least two positions. The apparatus also comprises a means for calculating the current from the nth spatial derivative.

Abstract: The inventive device for evaluating the sensor signal includes the provider for providing the sensor signal, the processor for processing the sensor signal and for providing an information signal comprising information regarding the amplitude course of the sensor signal and means for comparing the sensor signal to a first and a second comparison value, wherein the first and/or the second comparison value are adjustable based on the information signal such that a difference between the first and the second comparison value comprises a non-linear relation to the amplitude course of the sensor signal.

Abstract: An oscilloscope performs an in-circuit measurement of voltage across, and current through, a core winding of an inductor, and derives the actual B and H values with n number of turns, receives data indicative of the magnetic length of the circuit, and plots the B_H curve. The oscilloscope then derives the value of Saturation flux density (Bsat), Remnant flux density (Br), Permeability (?), and Coercivity (Hc) from this B-H plot. Characterizing the operating region of the magnetic component while it operates in a Switch Mode Power Supply (SMPS) under test, provides information concerning the stability of the power supply that was heretofore unavailable.

Abstract: To measure a physical parameter, a two-wire sensor produces pulse-width modulated signals (PWM) whose pulse width is preferably modulated as a function of the physical parameter to be measured. To indicate an error or a malfunction, the two-wire sensor provides an error signal with a specifiable pulse-width ratio that is preferably 1:1, while asymmetric pulse-width ratios are provided for the measurement signals (PWM). To measure a physical parameter that assumes only one of two states or values, the two-wire sensor produces a first measurement signal with a specifiable asymmetric pulse-width ratio and a second measurement signal formed by inversion of the first measurement signal. A plurality of two-wire sensors can for example be connected to a common two-wire line and operated in time-multiplex mode.

Abstract: A flux probe (100) for measuring the rotor flux of an electric generator (10). The probe (100) is affixed to a probe carrier (102) and held within a stator coil slot (62) by affixing the carrier (102) to two opposing grooves (104) formed in sidewalls (81) of the slot (62). One or more stator coils (18) are also disposed in the slot (62) and retained therein by a wedge (74) and corresponding spring (72) that applies an radially outwardly directed force to the coils (18). In one embodiment the probe carrier (102) is affixed to a radially inwardly directed face (82) of the wedge (74).

Abstract: Two centerlines each of which goes through the center of a surface and is parallel to one of the coordinate axes are considered for each surface constituting a cell. If one of the centerlines intersects a boundary, a line which goes through the intersection and is orthogonal to the centerline is approximated as a new boundary. If a boundary intersects with each of the two centerlines, an orthogonal line expressed by each of two lines which is obtained by crossing each of the two centerlines parallel to each different coordinate axis and a boundary is approximated as a new boundary. Thus, the new boundary is expressed by each part of these orthogonal lines toward the centerline from their intersection.

Abstract: A system for detecting the position of a component drivable by a control element drive, the system comprising: a position sensor housed in a position regulator housing, a movable motion representative to be driven by an actuating motion of the component, via which motion representative of a position motion of the component is transferred into the position regulator housing to the position sensor, which sensor detects the position of the component via the position of the motion representative wherein a drive for transferring and/or redirecting the actuating motion of the component to the motion representative transmits actuating motion forces from the component to the motion representative without contact.

Abstract: Disclosed is a method for controlling an SRM (Switched Reluctance Motor) switching angle by an analog encoder system that can perform a precise control of the switching angle of the SRM by comparing an analog sensor signal detected by the analog encoder system with a switching-on/off command signal. During a rotation of an encoder rotor having rotary slits formed at the same intervals on the encoder rotor and continuous contrast patterns formed between the respective rotary slits, analog sensor signals ?a to ?d detected in proportion to the contrast patterns are compared with a switching-on/off command signal controlled by a digital-to-analog (D/A) converter. A switching-on angle ?on is set to a crossing point of the switching-on command signal Von and a slope between the sensor signals ?a and ?o, and a switching-off angle ?off is set to a crossing point of the switching-off command signal Voff and a slope between the sensor signals ?o and ?d.

Abstract: A method and apparatus for the qualitative and quantitative detection of analytes is disclosed in which in the detection of an analyte in a sample, an elongated migration base is used, in which there is an area for binding a magnetically marked analyte, and in which, in stages the sample is absorbed into the migration base and the sample spreads on the migration base into the area. The elongated migration base is arranged in connection with a coil and a change in inductance, correlating with the content of the magnetically marked analyte, is detected.

Abstract: A method for preferentially observing an exposed position (1c) of a macromolecule. A sample is obtained having a macromolecule (1a) with a first proton (1) and a second molecule (2a) with a second proton (2); then applying a magnetic field (4) to the sample and irradiating the sample with a pulse sequence (5) that preferentially demagnetizes protons of the macromolecule (1, 3) relative to the second proton (2); allowing the second proton (2) to exchange (6) with an exposed proton (1) of the macromolecule; and detecting the magnetization from the relatively magnetized second proton (2), which is now bound to the exposed position (1c) of the macromolecule. The invention also provides a method for observing a position in the macromolecule that bind a ligand.

Abstract: A method for processing biomagnetic fields generated by biocurrents resulting from activities of human brain or myocardia and its mapping apparatus are provided, which features biomagnetic measurement and its analysis, magnetic field mapping and its imaging and their waveform generation by a simple operation. Biomagnetic fields emitted from the patient are measured at a plurality of measurement positions, and a contour map of magnetic field obtained as a result of processing of these measured biomagnetic fields is imaged in the magnetic contour map display apparatus, which display apparatus comprises: the process function display area indicating process function items including measurement; and the analysis data display area which displays the waveform together with a designated measurement time, the waveform being generated during measurement at least based on the measured biomagnetic fields and during the designated measurement period of time.

Abstract: A method of predicting the performance of certain electromagnetic devices is based on the integrated average core loss (IACL) and the integrated average relative permeability (IAP) of the electromagnetic core material used in the devices. The method includes the steps of establishing the range of induced magnetic fields over which the device is designed to operate, measuring the core loss and relative permeability of the core material over the range of induced fields and calculating the IACL and IAP over the range. Performance parameters can then be predicted using equations based on the IACL and the IAP with coefficients and constants derived through linear regression analysis.

Abstract: A method for improving the magnetic resonance imaging contrast of a selected portion of a sample. A selected ferrimagnetic constituent is associated with the sample portion, by molecular or biological attachment or by some other means, so that the sample portion is distinguished from other adjacent portions of the sample that do not have the selected ferrimagnetic constituent associated therewith. Alternatively, the sample portion is suspected, but not yet confirmed, to have the selected ferrimagnetic constituent associated with it. Ferromagnetic resonance imaging is performed on the sample portion, and at least one resonance frequency ?0 of the sample portion is provided. At least one material parameter of the sample portion is measured at or near the frequency ?0, with enhanced imaging contrast relative to adjacent portions of the sample that do not have the selected ferrimagnetic constituent in association.

Abstract: A method for machine diagnosis and, in particular, for transmission diagnosis of a machine or motor vehicle. The measurement system comprises a capturing magnet (2), on the surface of which the ferritic wear particles (3) to be detected accumulate. A binary measurement signal is produced by a reed contact (1) arranged opposite the capturing magnet (2). This measurement gives an indication of the condition of the machine or transmission.

Abstract: A non-ferrous component comprising a thermally-affected adhesive applied to a surface of the component, and at least one ferrous metal wire attached to the surface of the component by the thermally-affected adhesive.

Abstract: The invention includes an apparatus and method for determining the pass through flux of magnetic materials. The apparatus comprises one or more magnetic field sensors arranged in such a way as to collect field strength data in any or all the x, y, z directions. The apparatus also comprises a magnet field source or arrangement of magnet field sources which are placed beneath the material being characterized and includes a mechanism whereby the magnetic material can be mapped by the movement of any one or combination of: magnetic field source or sources, sensors and magnetic material. The invented method comprises the use of various configurations of magnetic sources in order to generate a magnetic field that emulates the open-loop condition found in magnetron sputtering.

Abstract: A device comprises a first magnetically conductive structure, a second magnetically conductive structure, and a circuit coupled the first and second magnetically conductive structures. The circuit senses information pertaining to a permeability of the first magnetically conductive structure relative to a permeability of the second magnetically conductive structure. The device may be used for various flux sensing and control applications, such as in current sensors.

Abstract: On a single chip are formed a plurality of magnetoresistance effect elements provided with pinned layers having fixed magnetization axes in the directions that cross each other. On a substrate 10 are formed magnetic layers that will become two magnetic tunnel effect elements 11, 21 as magnetoresistance effect elements. Magnetic-field-applying magnetic layers made of NiCo are formed to sandwich the magnetic layers in plan view. A magnetic field is applied to the magnetic-field-applying magnetic layers. The magnetic field is removed after the magnetic-field-applying magnetic layers are magnetized in the direction shown by arrow A.

Abstract: A coated electric wire is wound around a detection circuit in a planar manner for the purpose of electrostatic shield. This winding is performed, for example, spirally in a single layer. In the case where there are further provided a detection circuit board including a detection circuit and a cylindrical case, the coated electric wire is wound around the detection circuit board in a planar manner, wherein the direction of the axis of the cylindrical surface accords with the direction of the axis of the case. Consequently, there can be provided a sensor device in which the detection circuit can be electrostatically shielded with ease.

Abstract: A safety switch with an electronic programmable system including a group of two single-contact relays connected in series, associated with a matching element, a proximity element associated with a support element, magnetic sensors to check the contact status of each of the two relays, two calculation units connected to an exit to the magnetic sensors through the relative control signal connectors and to one entry by a common connector and a magnet associated with the proximity element, with the checking of the status of the relays being managed by the calculation units and taking place by sending a fixed number of fixed-frequency pulse width modulation pulses to the magnetic sensors of each of the single-contact relays and through the connectors and checking the return of the same pulses through the common connector.

Abstract: A device for measuring thin films and bulks is disclosed using slow-wave structures in electrodynamic elements to allow a decrease in frequency, an increase in sensitivity to electromagnetic parameters and accuracy of their monitoring. A method is also disclosed for monitoring of materials which includes placing an electrodynamic element near a monitored material and exciting an alternating electromagnetic field at an appropriate frequency to penetrate the monitored material concentrating in a small volume. Electromagnetic field parameters are then measured which are caused by the material parameters variation and said variations are converted to electromagnetic field parameters, the element being excited by an electromagnetic field in the form of at least one slowed electromagnetic wave.

Abstract: A float-type liquid level gauge assembly is provided for measuring the level of a liquid in a tank. The liquid level gauge includes a gear housing for efficiently coupling the gears and accurately assembling and aligning certain components; a movable pivot arm assembly supporting a float arm assembly; and a gear on the pivot arm assembly coupled with a pinion gear located in the gear housing. The pinion gear has a shaped passageway which accepts a similarly shaped drive shaft. A single piece magnetic cap, which defines a bore correspondingly shaped to accept the shaped drive shaft such that it will not rotate relative to the drive shaft, is installed on the drive shaft. The drive shaft and the magnetic cap each include a positioning feature, such that when the positioning feature of the drive shaft engages the positioning feature of the magnetic cap, the magnetic cap is properly aligned with a magnet in a dial assembly.

Abstract: An oocyte recording chamber for electrophysiological measurements. The recording chamber includes a base and a cover attached to the base. The cover and the base define a chamber having a size sufficient to accommodate an oocyte. The recording chamber includes a first electrode and a second electrode that are positioned so that the tips of the electrodes penetrate the membrane of the oocyte when the cover is fastened to the base. The recording chamber also includes a third electrode and a fourth electrode exposed to the chamber and used as ground electrodes.