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| Number | Title | Issue Date |
| 8138749 | Optical imaging and patterning based on a magnetically controlled ferrofluid Methods, systems, and apparatus for optical imaging and patterning based on a magnetically controlled ferrofluid are described. One such system includes a substrate and an active region including multiple magnetic field generators. The active region is positioned ad... | 03/20/2012 |
| 8058865 | Sensor device, sensor arrangement, and method of measuring a property of an object A sensor device measures a property of an object. The sensor device comprises a magnetic field generator adapted to generate a magnetic field in at least a part of the object, and at least one magnetic field detector adapted to detect at least one detection signal i... | 11/15/2011 |
| 8049489 | Systems and methods for sensing external magnetic fields in implantable medical devices Systems and methods for sensing external magnetic fields in implantable medical devices are provided. One aspect of this disclosure relates to an apparatus for sensing magnetic fields. An apparatus embodiment includes a sensing circuit with at least one inductor hav... | 11/01/2011 |
| 8040127 | Multi-sensor distortion mapping method and system In one aspect of the present technique, an array of electromagnetic sensors is positioned within a volume of interest. In the presence of an electromagnetic field, the array of electromagnetic sensors is sampled to acquire signals representative of the location of t... | 10/18/2011 |
| 8018222 | Electromagnetic field-based position sensor There is described a position sensor comprising a sensor electromagnetic field generator, a screen arranged to confine the sensor electromagnetic field, and an output. The output is arranged to provide a signal which varies in dependence upon an amount of flux compr... | 09/13/2011 |
| 7999534 | Rotation sensor with detection signal timing cycle features A rotation sensor including: a main rotor that integrally rotates with a rotor to be measured; a sub-rotor that rotates in accordance with rotation of the main rotor with a different number of revolutions from that of the main rotor; a first detector detecting rotat... | 08/16/2011 |
| 7969142 | System and method for magnetic tracking of a sensor having an asymmetric magnetic core A system and method for determining the location of a remote object connected to an induction coil using a magnetic tracking sensor. The system and method include locating a magnetic core asymmetrically disposed within the induction coil located near the remote obje... | 06/28/2011 |
| 7915887 | Device for generating a magnetic field in a goal area for taking a goal decision A device for generating a magnetic field in a goal area with at least two coils arranged in parallel to a goal area defined and bounded by a goal, wherein a first coil is attached in an area behind the goal and a second coil is attached closer to the goal than the f... | 03/29/2011 |
| 7863891 | Collision detection device which uses variation of an inductance of a coil A collision detection device is provided with a coil which is arranged at an inner side of an outer panel of a body portion of a vehicle and faces the outer panel to generate a magnetic field in a direction toward the outer panel, and a collision determining unit fo... | 01/04/2011 |
| 7768257 | Systems and methods for determining the position of an electrical solenoid Provided herein are systems and methods which use the solenoid itself to sense the position of the armature within the solenoid, and therefore to determine the position of the solenoid's armature, and or any related devices whose movement is dependent on the armatur... | 08/03/2010 |
| 7679361 | Position sensor having tubular detection coil A compact position sensor with high operational reliability is provided. This sensor has a tubular detection coil, a magnetic core movable in the detection coil, a drive circuit for the detection coil, a signal processing circuit for converting a change in impedance... | 03/16/2010 |
| 7602174 | Sensor for detecting displacement A sensor assembly includes a moveable member and an inductor coil. A flexible inductor member moves relative to the inductor coil in response to movement of the moveable member. This produces an inductance signal that indicates the movement of the moveable member. | 10/13/2009 |
| 7602175 | Non-contacting position measuring system A non-contacting position measuring system comprising a sensor that includes a measuring coil which can be energized with alternating current, where the measuring coil comprises at least two voltage taps, an electrically or magnetically conductive object to be measu... | 10/13/2009 |
| 7598734 | Position sensor with a shield member for improving linearity of impedance of the detection coil A position sensor with excellent linearity of coil impedance is provided. This position sensor is equipped with a tubular detection coil, a magnetic core movable in the detection coil, a drive circuit for the detection coil, a signal processing circuit for convertin... | 10/06/2009 |
| 7511478 | Sensorless position measurement method for solenoid-based actuation devices using inductance variation A sensorless position measurement method may be used to determine the position of a solenoid-based actuator which controls some substance. The sensorless position measurement method of the present invention eliminates the need for a dedicated sensor in the actuator ... | 03/31/2009 |
| 7511477 | Displacement detector The present invention is directed to a displacement detector which can compensate a change in temperature coefficient of impedance of a coil to a displacement of a core. The detector comprises a constant-current supply unit for outputting a constant current includin... | 03/31/2009 |
| 7508195 | Anti-distortion electromagnetic sensor method and system A source for inducing an electromagnetic magnetic field, comprising: a substrate, a conductive layer coupled to the substrate, and a planar coil coupled to the substrate, wherein the planar coil comprises non-concentric rings, and wherein the non-concentric rings ar... | 03/24/2009 |
| 7432721 | Solenoid actuator motion detection A method of determining change in actuator position includes determining a slope of the inductor current with time and determining whether the slope exceeds a first predetermined slope for a first predetermined time, determining whether the slope is less than a seco... | 10/07/2008 |
| 7432703 | Rope position sensor A rope position sensor for the surveillance of the position of the traction or carrying rope of a transport installation on a grooved pulley comprises an inductive distance measuring unit capable of emitting an alternating magnetic field and of detecting the attenua... | 10/07/2008 |
| 7402996 | Instrument and method for measuring three-dimensional motion An instrument (10) for measuring three-dimensional motion in a living body comprises a plurality of magnetism generators (12i) fixed to one of at least two objects (44, 46) moving relatively in the living body, a plurality of magnetic... | 07/22/2008 |
| 7372256 | Rotation sensor A rotation sensor including a rotor mounted to a rotating shaft and having a conductive sensing unit which varies in width circumferentially thereof; and stationary cores each having an exciting coil being flown with an alternating exciting current for establishing ... | 05/13/2008 |
| 7372255 | Detection of the instantaneous position of a linearly reciprocating member using high frequency injection A piston position sensing circuit for sensing the instantaneous position of a piston of a free piston Stirling machine or a compressor mechanically connected to a reciprocating member of a linear electric motor or alternator. A source of a high frequency, alternatin... | 05/13/2008 |
| 7358720 | Proximity sensor interface A first measured value is determined which is associated with the proximity of a target to an inductive sensor. A first voltage signal having a first amplitude is generated. The first voltage signal is provided as a driving signal to the inductive sensor. A sensor c... | 04/15/2008 |
| 7336069 | Eddy current sensor and sensor coil for the same The invention pertains to an eddy current sensor with a sensor circuit having a head portion, including a sensor coil, a base portion and a transmission cable connecting the head portion to the base portion. The transmission cable is a triaxial cable and the sensor ... | 02/26/2008 |
| 7331244 | Stamping press line simulation device and method An apparatus and method for testing a stamping press die that has includes a plurality of mechanical devices. The apparatus includes a plurality of pneumatic connections for supplying pressurized air to each of the plurality of mechanical devices; a plurality of val... | 02/19/2008 |
| 7329373 | Control method of rotational speed of screw for injection molding machine A control method of a rotational speed of a screw for an injection molding machine, wherein rotation of a motor is transmitted the screw disposed within a cylinder member attached to an injection frame, includes the steps of (a) sending an electric current to a stat... | 02/12/2008 |
| 7325781 | Automatic bathroom flushers with modular design A bathroom flusher includes a flusher body, a valve assembly, an electronic control system, and a flusher cover. The flusher body includes an inlet and an outlet, and is designed to accommodate the valve assembly that controls water flow between the inlet and the ou... | 02/05/2008 |
| 7323863 | Inductive transducer measurement system An inductive transducer measurement system is provided. A measuring circuit simultaneously drives a plurality of transducer windings and measures their inductance by using a load impedance in an inductance measurement circuit configuration. The system may be designe... | 01/29/2008 |
| 7324919 | Apparatus for analysing the condition of a machine An apparatus for analysing the condition of a machine having a rotating shaft, includes: at least one input for receiving measurement data from a sensor for surveying a measuring point of the machine, the measurement data being dependent on rotation of the shaft; an... | 01/29/2008 |
| 7323867 | Apparatus which detects the thickness of a sheet of paper such as a bank note A thickness detecting apparatus comprises a printed board in a part of which a coil is patterned, a detection roller which is disposed near the coil, which detects thickness of a sheet P of paper as a displacement amount, and a thickness detection circuit mounted on... | 01/29/2008 |
| 7322744 | Temperature measurement device A temperature measuring device includes a temperature-responsive element that mechanically moves a first inductive assembly component relative to a second inductive assembly component in response to temperature changes. The movement of the first inductive assembly c... | 01/29/2008 |
| 7321229 | Inductive position sensors with secondary windings with increased or decreased number of turns A position sensor comprising a primary winding (26) for generating a magnetic flux, a first secondary winding (24.1) the number of turns of which increases in one direction, a second secondary winding (24.2) the number of turns of which increase... | 01/22/2008 |
| 7320817 | Holding structure and a molding with the same A holding structure includes a held member located in a case, and a guiding space defined between the held member and a predetermined inner surface of the case. A primary molding resin is guided into the guiding space upon injection of the primary molding resin such... | 01/22/2008 |
| 7315599 | Skew correction circuit A skew correction circuit includes a first circuit and a second circuit. The first circuit generates at least one pulse train signal in response to a data bit signal and a first strobe signal. A duty cycle of the pulse train signal is indicative of a degree of skew ... | 01/01/2008 |
| 7302868 | Method for measuring forces acted upon tire and apparatus for measuring forces acted upon tire There is provided an apparatus for measuring forces acted upon a tire in which a radial force and a peripheral force acting to the tire, which are required for the high precision measurement of a friction coefficient on a road surface, are simply measured in a high ... | 12/04/2007 |
| 7301333 | Angle position detection apparatus An angle position detection apparatus according to the present invention includes: a unipolar resolver and a multipolar resolver installed so that reluctance is changed in synchronization with the revolution of a direct motor drive; and a select switch is used to sw... | 11/27/2007 |
| 7288933 | Position detecting system that self-monitors for connectivity faults A system for detecting position that is capable of self-monitoring for connectivity faults. In one embodiment, the system comprises a transformer, an excitation potential source, a bias potential source, and a processor. ... | 10/30/2007 |
| 7285964 | Method for signal extraction in a universal sensor IC A apparatus and method for creating a universally usable and configurable sensor platform which is used in conjunction with various sensor and sensing elements to sense and measure environmental conditions which incorporates inputs from multiple sensors 6-... | 10/23/2007 |
| 7281432 | Displacement sensor with an excitation coil and a detection coil To be able to detect a displacement amount of a moving object by a resolution of from micrometer to nanometer by a simple structure. An excitation coil 23 and a detection coil 25 are arranged to align and a magnetic body probe 27 in a con... | 10/16/2007 |
| 7279859 | EC motor and method for operating same In a method for operating an EC motor, position-measurement signals are recorded by a position-measuring device, and, on the basis of the position-measurement signals, commutation instants are determined, at which the current supply to the EC motor is commutated. At... | 10/09/2007 |
