770 results about "Metallic Object" patented technology

A magnetic field position and orientation measurement system contains, confines and re-directs the magnetic field from one or more transmitters such that the fields are attenuated in areas outside of the operating volume in areas where metallic objects are commonly found. A thin barrier made of a highly permeable material such as ferrite or mumetal is placed on top of a conductive plate. The thickness of the permeable layer is from 0.01 inches to 0.25 inches while the conductive plate, preferably made of an aluminum alloy, may preferably be from {fraction (3/16)} of an inch to ¼ inch in thickness. On top of the permeable barrier, a rhombic three axis transmitter is placed. In the preferred embodiment, the transmitter consists of a PC board carrying the transmitter. PC boards having thicknesses varying from 0.03125-0.125 inches may be employed. Thus, the entire "stack" including the transmitter, the permeable barrier and the conductive plate may only be from ½ inch to ⅝ of an inch in thickness. The permeable barrier may have a flat, planar configuration. Alternatively, it may be made to resemble, in cross-section, a cake pan having a flat central region with uplifted peripheral edges. Alternatively, the permeable barrier may have a generally flat configuration with peripheral edges that taper outwardly from the top surface thereof to the bottom surface thereof with the taper making an angle with the bottom surface in the range of, preferably, 30° to 85°.

Provided are a dipole tag antenna using an artificial magnetic conductor (AMC) for wireless identification and a wireless identification system using the dipole tag antenna. The dipole tag antenna includes: a substrate formed of a first dielectric material; a conductive ground layer formed underneath the substrate; an AMC layer formed on the substrate; the dipole tag antenna mounted on the AMC layer and comprising a wireless identification chip; and the AMC directly mounted on a conductor.

Apparatus for detecting a metal object comprises a transmitter for generating a pulsed or an alternating magnetic field in the vicinity of the metal object to be detected and a detector for detecting the secondary magnetic field induced in the metal object by the transmitted magnetic field. The detector measures at least three magnetic field gradient components of at least first order of the secondary magnetic field. The apparatus also comprises a processor for determining at least one of the position or the electro-magnetic cross-section or an estimate of the shape of the metal object from the measured magnetic field spatial gradient components. The processor fits the measured components to dipole, multiple dipole, multipole, or extended source models. In a preferred embodiment, the invention may comprise three or more pairs of gradiometric coils, or other sensing means. The detector measures at least five magnetic field gradient components of at least first order, and one or more components of the secondary magnetic field. The detector may be coils, or any other magnetic sensors. The processor enters pre-determined criteria to discriminate against detection of metal objects of no interest or to selectively detect metal objects of interest.

A multi-function layout square of modular construction having a laser that is capable of performing multiple functions is disclosed. The multi-function square has a metallic outer casing with magnetic properties, with a protractor plate slidably, pivotally, and removably attached by thumbscrews to the casing that can be moved and rotated with respect to the casing and slid linearly along a portion of the length of the casing. When the protractor plate is removed the casing may be used as a level, a plumb bob, a ruler, and a compass. When the protractor plate is attached the tool may be used as a framing square, roofing framing square or rafter square, and a gauge or scribe for straight lines, arcs, or circles. The laser, a switch, and a pair of bubble level vials are contained in a module installed at one end of the casing, and a second module containing batteries is removably installed at the other end of the casing. Each module has electrical contacts that engage the interior surface of the casing and contacts that engage the batteries when the modules are installed and abutted. When the switch is on, a circuit is completed through the metallic casing, which electrically connects the batteries to the laser. The casing may be suspended vertically from a support surface by passing a string or wire through a bore in one of the thumbscrews, may be mounted on a tripod, or may be magnetically attached to metal objects.

A metallic resin cover constitutes a portion of an outer wall of a human detection device in which a detection electrode of a capacitance sensor is provided, and which detects whether a human touches or approaches the human detection device. The metallic resin cover includes a covered body; and a metal layer that has a metal-object discretely arranged structure in which a plurality of metal objects are discretely arranged. The metal layer covers an outer surface of the covered body.

A system and method to detect a foreign object proximate to a source resonator that is part of a wireless energy transfer system. The wireless energy transfer system may be one used to wirelessly charge the batteries of an electric vehicle. Data from a visible light camera and a multiple zone temperature sensor are combined or fused to determine whether a foreign object, such a metallic object or an animal, is in the vicinity of, or in close proximity to, a source resonator. The system controls an electric current provided to the source resonator based on whether a foreign object is detected to reduce or inhibit energy emitted by the source resonator. The visible light camera may be a monochrome or color camera and the temperature sensor may be an infrared camera or a thermopile array.

An apparatus and method for performing nuclear magnetic resonance (NMR) or magnetic resonance imaging (MRI) on samples in metallic holders and vessels or in proximity to metallic objects is disclosed.

A method for detecting metal using an electronic article surveillance (“EAS”) system. The EAS system includes a transmitter and a receiver. An EAS interrogation signal is transmitted to establish the interrogation zone. The EAS interrogation signal is used to detect EAS markers and metal objects within the interrogation zone. The EAS signal is received and a metal object present in the interrogation zone is detected during a metal detection cycle. The metal object is detected based upon perturbations in the received EAS interrogation signal. The metal detection cycle is periodically interspersed with at least one EAS detection cycle.

A low impedance sensor includes thin conductive electrodes on a dielectric substrate and detects proximity of a target metal object or structure moving along defined path such as a track. The sensor includes a first conductive electrode pad having a closed, continuous geometric form and a second conductive electrode surrounding the first electrode and spaced from the first electrode by a channel of non-conductive dielectric. The first and second electrodes are optionally disposed on the same surface of the substrate. An integrated control circuit is located on the substrate proximate the first and second electrodes, and is electrically coupled to the first and second electrodes.

A system and method for reducing the occurrence of false alarms in metal detection systems and combination EAS/metal detection systems. The system includes a motion sensor mounted on or near an antenna housing, such as an EAS pedestal, at the entrance/exit of a given interrogation zone. The motion sensor detects movement or vibration of the antenna housing. The sensor transmits signals to a controller that determines if the antenna housing has moved a predetermined amount. The system includes a metal detection module that determines if metal objects are proximate the pedestal. If metal objects are detected, a metal detection alarm is enabled. However, if it is determined that the antenna housing is moving or vibrating at least a predetermined amount, the controller inhibits generation of the metal detection alarm signal.

A radio frequency identification (RFID) tag is adapted to operate with a wideband or multiple band of frequencies, such as 860-960 MHz. The RFID tag includes a flexible antenna inlay structure that can be integrated into a rigid structure to form a rigid RFID tag. The antenna inlay structure can be folded to provide a compact rigid RFID tag. The antenna inlay structure may also be used in a smart label. The antenna inlay structure can work with RFID chips operating under Gen 2, ISO, or other protocol. The RFID tag can be provided with a metallized label that operates to shield the antenna inlay structure against electromagnetic effects of an object (such as a metallic object) having the RFID tag affixed thereon.

A magnetic shielding mechanism for preventing penetration of metallic objects through an aperture, towards the open bore of an magnetic resonance imaging device, where the magnetic field is maximized. The magnetic resonance imaging device produces a fringing magnetic field that decreases with increasing distance (L) from the aperture. The mechanism includes at least one magnet with a magnetic field. The mechanism is affixed at a distance from the aperture of magnetic resonance imaging device.

An RFID device includes an antenna structure that provides good performance throughout a range of different positions relative to nearby materials, such as metallic objects in a carton or other container. The antenna structure has compensation elements that interact with the nearby materials to provide good performance over the range of different positions. The compensation elements include both electrical compensation elements, which interact with the nearby materials primarily using electric fields, and magnetic compensation elements, which interact with the nearby materials primarily using magnetic fields. The electrical compensation elements and the magnetic compensation elements may be selected and may be positioned within the antenna structure such that the performance of the antenna structure is substantially unchanged (or at least acceptable) through the range of different positions.

Disclosed are environmentally friendly, substantially all solids coating compositions which are curable using ultraviolet and visible radiation. In addition, the disclosed coating compositions are suitable for coating flexible objects and/or objects having angular features, such as, but not limited to, flexible metal objects with angular features. In addition, methods are disclosed for coating surfaces, or at least a portion of the surfaces, and curing of the coated surface to obtain partially or fully cured coated surfaces. Furthermore, articles of manufacture incorporating fully cured coated surfaces are disclosed, including, for example leaf springs. Also disclosed are methods, processes, production lines, articles of manufacture, and factories which incorporate these environmentally friendly, substantially all solids coating compositions curable using ultraviolet and visible radiation.

There is provided a magnetic antenna, suitable for use in an RFID tag and an RFID tag reader/writer, which operates stable even if brought close to a metallic object and suitable for mass-production, and a board mounted with the magnetic antenna. The magnetic antenna has a coil comprising a magnetic layer and a conductive layer provided on the magnetic layer via an insulating layer. Alternatively, the magnetic antenna has a plurality of coils each comprising a magnetic layer having a square or rectangular shape and arranged radially. One ends of the coils are connected in series or parallel to one another by the magnetic layers thereof such that the coils have the same polarity. An insulating layer is provided on one or both outer surface of the coils, and a conductive layer is provided on an outer surface of at least one of the insulating layers. The magnetic antenna is produced using an LTCC technology.

An inductive lighting assembly for an appliance is provided. The appliance includes a cabinet, a liner installed in the cabinet, and at least one shelf mounted in the cabinet. The inductive lighting assembly includes a coil locator channel recessed into the cabinet, a primary coil mounted proximate to the coil locator channel, a shelf having a projection coupled thereto; the projection configured to be at least partially inserted into the coil locator channel to separate a metallic object placed on the shelf from the primary coil by a predetermined distance, and a secondary coil mounted in the projection, the primary coil transferring power to the secondary coil through inductive power transfer, the secondary coil being electrically connected to a light assembly installed in the appliance. A refrigerator including an inductive lighting system is also provided herein.

An amusement device is disclosed having an animal body portion and a remote control portion. The animal body portion may be a lizard having horns and a tail. A user may use the remote control to cause the animal to move. The animal body has at least one motor operably connected to the animal's head, legs, and tail. The motor causes the animal to walk forward, walk backward, or dance in place at the selection of the user, and causes the tail to move and the mouth of the animal's head to move. An extendable tongue protrudes from the mouth. The tongue may have a magnetic tip for connecting with a magnetic or metallic object. The device may also contain a speaker that plays music and/or words as selected by the user through the remote control. In one embodiment, the lizard dances while playing music.

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.

A metal detecting device for the detection of a metal object concealed in shoe or on a leg of a subject, including:

• • a housing with a platform having an upper surface with indication areas thereon for the correct positioning of each of a subject's feet,
  • left-foot and right-foot electromagnetic coils under the indication areas connected to a power supply via an oscillator and a switch,
  • an electromagnetic shield divider between the left-foot and right-foot electromagnetic coils,
  • a detection system for the detection of the placement of the subjects feet on the indication area,
  • a processing unit for processing signals from the electromagnetic coils and detection system, and
  • a display connected to the processing unit for displaying a warning signal if metal is detected.

The invention discloses an attenuation filter-based metal artifact removing mixed reconstruction method for CT images. When a CT acquires data, if a scanned object contains a metal object with high absorption coefficients which comprises a tissue attenuation coefficient and a metal attenuation coefficient to cause projection data jump, the scanned object is considered to be destructive and should be corrected; thus, the metal artifact is greatly weakened during FPB reconstruction. The method comprises the following steps: after determining a metal projection area, performing adaptive attenuation adjustment and filter on the determined metal area; reconstructing an entire image through the FBP, performing EM iterative reconstruction on the metal area by using the primary projection data, and correcting the metal area after the adaptive attenuation filter and reconstruction; and compensating the metal projection area. The numerical simulation CT experiments prove that the method can effectively remove metal artifacts and well keep the information of the metal and the surrounding tissue of the metal. Particularly under the condition of multiple metal objects, the method has low calculation complexity and high practical value.

Processing metallic materials, such as copper, from waste materials. The systems and methods employ a dynamic sensor, which measures the rate of change of current generated by metallic objects that pass by the sensor to identify metallic objects in a waste stream. The dynamic sensor may be coupled to a computer system that controls a material diverter unit, which diverts the detected metallic objects for collection and possible further processing. The systems or methods may employ stages of sensors for sequential recovery of materials.

A solid medical waste collection system for collecting solid medical waste. The system includes a mobile cart with a bag for storing the waste. A pre-detection apparatus detects metal-containing objects prior to placing them inside the bag to reduce costs to the facility in which the cart is employed. The system may also include a bag-tensioning mechanism for securing the bag to the cart.