Class / Patent application number | Description | Number of patent applications / Date published |
324259000 | Movable magnet or magnetic member interacts with magnetic field | 16 |
20100148772 | Method and apparatus for measuring electric currents - A method and an apparatus for measuring electric currents include at least one sensor for measuring the magnitude of the field strength depending on the current. The current to be measured is conducted past the sensor at least partially with oppositely directed directional components at the sensor. At least one magnetic field sensor can be used as a sensor. | 06-17-2010 |
20100156407 | Arragement and method for recognising and classifying preferably hidden objects in object and/or human traffic - An arrangement and method recognizes and classifies preferably hidden objects in object and/or human traffic. Objects relevant to security are recognized, located and tracked through the surroundings thereof in moving object and human traffic isolated in real time. Use is made of a combination of a field generator, the field of which is modified by at least one corresponding object within the scanned space, first sensors which repeatedly record the changes in the field and provide corresponding signals, second sensors which record defined surroundings of the object in real-time with relation to the first sensors and provide corresponding signals and analytical means which correlate and collate the signals from the sensors with each other and which give from the same the shape, spatial position and/or spatial orientation of the object. | 06-24-2010 |
20100156408 | DC magnetic field interceptor apparatus and method - A hand held apparatus and method for detecting paper currency, within a package, where the paper currency has a ferromagnetic component. The apparatus includes a DC magnetic field source for inducing a DC de-magnetization field in any ferromagnetic paper currency that may be present within a package, and DC magnetic sensors for detecting certain characteristic patterns in the DC “de-mag” field induced by the DC magnetic field source. These certain characteristic field patterns are indicative of paper currency arranged in commonly found arrangements. | 06-24-2010 |
20110163747 | HOUSING FOR A MAGNETOMETER, A COMBINATION INCLUDING A MAGNETOMETER WITHIN A WATERPROOF HOUSING, AND A SYSTEM AND METHOD FOR LOCATION AND REMOVAL OF UNEXPLODED ORDINANCE UNDERWATER - A waterproof housing that encloses a hand-held magnetometer for underwater use and includes a first portion open at one end and connected to a second portion with one end open and accessible through the first portion and terminating at a closed end. The magnetometer has first and second housings and is inserted into the first portion open end so that the second housing is received into the second portion and the first housing is received into the first portion. A base seal is inserted into the first portion open end to provide a fully functional magnetometer protected from water incursion at depth. | 07-07-2011 |
20110267050 | MAGNETIC STUD FINDER - A magnetic apparatus for locating hidden ferrous fasteners includes a holder of a preselected non-ferromagnetic material having a base member and at least one wall member of a first predetermined height. The wall member being fixed substantially normal to the base member and has a perimeter about 30 to 70% of a perimeter of the base member. The apparatus further includes a cylindrical magnet of preselected type having a predetermined diameter and a second predetermined height and having sufficient strength to pull itself to such hidden ferrous fastener across a separation distance of at least ½-inch. | 11-03-2011 |
20130241546 | 3D MEMS MAGNETOMETER - A micro-electromechanical systems (MEMS) magnetometer includes first fixed electrodes, second fixed electrodes, a mobile element to rotate about a first rotation axis along a first direction and translate along a second direction orthogonal to the first direction, mobile electrodes extending from the first mobile element and being interdigitated with the first fixed electrodes to form first sensor assemblies, a rotation element coupled to the mobile element to rotate about a second rotation axis along the second direction, the rotation element having a surface opposite the second fixed electrodes to form second sensor assemblies, the second fixed electrode being displaced from the surface of the rotation element along a third direction, and a trace having sections along the first direction and offset from the first rotation axis and along the second direction and offset from the second rotation axis. | 09-19-2013 |
20140049256 | RESONANT MEMS LORENTZ-FORCE MAGNETOMETER USING FORCE-FEEDBACK AND FREQUENCY-LOCKED COIL EXCITATION - A method includes supplying a current to at least one conductive path integral with a MEMS device to thereby exert a Lorentz force on the MEMS device in the presence of a magnetic field. The method includes determining the magnetic field based on a control value in a control loop configured to maintain a constrained range of motion of the MEMS device. The control loop may be configured to maintain the MEMS device in a stationary position. The current may have a frequency equal to a resonant frequency of the MEMS device. | 02-20-2014 |
20140152300 | STUD MAGNET DEVICE - A magnetic stud sensor includes a handle portion and a body portion which together form an enclosure for loosely enclosing a magnet. The handle portion is adapted with indentations for a user's fingers and a projection for urging the magnet toward a wall. The body portion includes guides which, in connection with the projection, loosely hold the magnet near a planar portion of the body portion proximal a wall when the stud sensor is in use. As the stud sensor approaches a metal object behind a wall panel, the magnet is urged against and strikes the planar portion making an audible clicking or tapping sound. | 06-05-2014 |
20140292323 | Two Axes MEMS Resonant Magnetometer - A two-axes MEMS magnetometer includes, in one plane, a freestanding rectangular frame having inner walls and four torsion springs, wherein opposing inner walls of the frame are contacted by one end of only two torsion springs, each torsion spring being anchored by its other end, towards the centre of the frame, to a substrate. In operation, the magnetometer measures the magnetic field in two orthogonal sensing modes using differential capacitance measurements. | 10-02-2014 |
20140300351 | METAL SENSOR - A metal sensor includes a primary coil, a compensation coil, a first additional coil, and a magnetic field sensor. The first additional coil is configured to be excited without the primary coil and the compensation coil being excited. | 10-09-2014 |
20140375312 | Systems and Methods for Providing Signal Encoding Representative of a Signature Region in a Target - A magnetic field sensor and associated method provide an output signal with an identifiable encoding to indicate when a signature region in a moving target proximate to the magnetic field sensor passes by the magnetic field sensor. | 12-25-2014 |
20150115952 | DEVICE WITH MAGNETIC SENSORS WITH PERMANENT MAGNETS - A device with a magnetic sensor is disclosed. The device includes a substrate with a device layer. A magnetic sensor is formed on the device layer and includes a first permanent magnet. The first permanent magnet has at least one alternating ferromagnetic (FM) layer and antiferromagnetic (AFM) layer, with a buffer layer disposed between the FM layer and the AFM layer. The first permanent magnet is magnetized in a first direction at a temperature higher than a blocking temperature of the AFM layer. A plurality of device pads are coupled to the magnetic sensor. An integrated circuit substrate with a plurality of IC pads, wherein the plurality of device pads are selectively eutectic bonded to the plurality of IC pads at a bonding temperature greater than the blocking temperature of the AFM layer of the first permanent magnet. | 04-30-2015 |
20150123656 | SENSOR FOR MAGNETIC FIELDS WITH LAPLACE FORCE - A magnetic field sensor comprises a substrate and a moving part which is displaced when subjected to a Laplace force. There is a gauge for measuring the displacement of the moving part. There is a suspended lever that is rotationally displaced about an axis of rotation at right angles to the direction of displacement of the moving part. The lever is connected to the moving part to transmit displacement of the moving part to the lever to cause rotation of the lever about the axis of rotation. The lever is also connected to a first part of the gauge. The sensor comprises a hinge that connects the lever to the substrate. The hinge allows the rotation of the lever about its axis of rotation and is rigid to allow for a lever arm effect. The second part of the gauge is fixed with no degree of freedom to the substrate. | 05-07-2015 |
20160054400 | MEMBRANE BASED MAGNETOMETER - Various exemplary embodiments relate to a magnetometer device to measure oscillation frequency, including a feedthrough loop including an amplifier and a voltage bias connected to a first input of a metallic membrane; a membrane ground connected to a membrane output; a fixed plate including a first fixed plate output connected to a second input of the amplifier, wherein the fixed plate is physically separated from the metallic membrane but connected to the metallic membrane by a Lorentz force, and where the physical separation differs due to an angle of a magnetic field relative to a direction of a current; a second fixed plate output sensitive to the Lorentz force; and a circuit connected to the second fixed plate output to calculate an angle of the magnetic force based upon the Lorentz force. | 02-25-2016 |
20160084921 | RESONANT MAGNETIC FIELD SENSOR - Disclosed is a resonant magnetic field sensor, comprising a detector structure including a mass block and displacement detection electrodes; capacitance to voltage converter and amplifier to convert detection signals of the detection electrodes into voltage signals, as output signals of the magnetic field sensor; and a vibration driving circuit to provide the output signals to the mass block in the form of a current, to drive the mass block to vibrate. The vibration driving circuit may be a comparator. | 03-24-2016 |
20160161572 | MEMS MAGNETIC FIELD SENSOR - The disclosure provides a magnetic field sensor for sensing the magnetic field caused by a current to be measured, which includes: substrate; a first drive electrode with a path for flowing a reference current supplied from the substrate arranged so as to be moveable by the magnetic field of the current to be measured; and a second drive electrode with a path for flowing a reference current supplied from the substrate arranged so as to be moveable by the magnetic field of the current to be measured, thus measuring the variation of a capacitance caused by the movement of the first drive electrode and the second drive electrode. Hence, the sensing is achieved by the two drive electrodes with no reference electrode, thus maximizing the mechanical displacement to improve the sensing capability. | 06-09-2016 |