29 results about "Oscillating magnetic field" patented technology

The application discloses a kind of micro tube robot assembly, drive and radial extrusion method, assembly includes the following steps: step one, 0.05-2wt.% magnetic colloidal particles are assembled into two-dimensional monolayer colloidal film under xy plane oscillation magnetic field;Step two, z direction direct current magnetic field is applied and gradually increase magnetic field intensity, until monolayer colloidal film breaks into sheet;Step three, precession magnetic field is applied, sheet is bent to form the micro tube robot of dense hollow tubular structure;Drive: micro tube robot can be accurately controlled by three-dimensional magnetic field and drive direction and speed, hollow interior space is used to capture and transport micro cargo;Radial extrusion: micro tube robot assembled under oscillation magnetic field can realize radial direction repeated extrusion without breaking.The present application realizes metastable assembly from one-dimensional isotropic microspheres to three-dimensional micro tubular micro robots for the first time, is suitable for newtonian fluid and non-newtonian fluid, and can meet different application scenarios.

The present invention relates to an inductive position sensor (1) for a rotating electrical machine comprising a printed circuit board (12) housed in at least one casing (10), having on its main face (120) at least one emitting element (13) for emitting an oscillating magnetic field towards a rotating target (2) to generate a modified oscillating magnetic field, and at least one receiving device (14) for detecting the modified oscillating magnetic field, the sensor comprising fluid circulation means (16, 17, 18) for allowing the circulation of a fluid into a rotor shaft (22) of the electrical machine (3), the fluid circulation means being formed by at least one double bottom (105) of the housing (10) of the sensor (1) forming a conduit (17) which allows the circulation of a lubricating fluid. Figure 1.

To disrupt mitochondrial function in certain cells, controlling hardware causes a magnet to oscillate so as to generate an oscillating magnetic field. The oscillating magnetic field is applied to a volume of tissue including cells with degraded mitochondria to trigger apoptosis in the cells with degraded mitochondria.

An apparatus configured to generate an oscillating magnetic field having a frequency of 2khz to 1Mhz in a target region defining a length direction, the apparatus comprising a sheet conductor (7, 8, f

An aerosol delivery device includes an electrical power source, an induction receiver configured to receive a substrate including an aerosol precursor composition such that the induction receiver is in proximity to the substrate, and a wireless power transmitter including an induction transmitter. The induction transmitter is configured to removably receive the induction receiver such that the induction transmitter surrounds the induction receiver. The induction transmitter receive electrical current from the electrical power source that causes the induction transmitter to generate an oscillating magnetic field, and the induction receiver generates heat via eddy currents induced at the induction receiver when exposed to the oscillating magnetic field and thereby heats the aerosol precursor composition to produce an aerosol. Related methods are also provided.

A level sensing system including a level sensor disposed in a first and second medium. The level sensor includes: a spring-mass system disposed within a sensor housing, the spring-mass system comprising a magnetic mass and a spring that couples the magnetic mass to the sensor housing; an electrical conductor configured to generate an oscillating magnetic field for driving oscillating motion of the magnetic mass; and a sensor configured to sense a back electromotive force in the electrical conductor caused by the oscillating motion of the magnetic mass. The level sensing system comprises a processor configured to: determine a frequency based on the sensed back electromotive force or the oscillating motion of the magnetic mass; determine whether the frequency is greater or less than a threshold value; determine whether the level sensor is or is not disposed partly or wholly in the first and / or second medium.

The present invention relates to an inductive position sensor (1) for a rotating electrical machine comprising a printed circuit board (12) housed in at least one enclosure (10), having on its main face (120) at least one emitting element (13) for emitting an oscillating magnetic field towards a rotating target (2) to generate a modified oscillating magnetic field, and at least one receiving device (14) for detecting the modified oscillating magnetic field, the sensor comprising fluid circulation means (16, 17, 18) for allowing the circulation of a fluid into a rotor shaft (22) of the electrical machine (3), the fluid circulation means being formed by at least one double bottom (105) of the cover (11) of the sensor (1) forming a conduit (17) which allows the circulation of a lubricating fluid. Figure 1.

This invention relates to the field of blood analysis technology, and discloses a blood analysis method, apparatus, and system. The blood analysis method includes the following steps: acquiring optical modulation information, which refers to the information of light modulated by magnetic beads that undergo Brownian rotation driven by an oscillating magnetic field in the blood sample; processing the optical modulation information to obtain the analysis results of the blood sample, including magnetic bead-based coagulation detection results and optical coagulation detection results of the blood sample. Applying the technical solution of this invention, it is possible to simultaneously obtain both optical and magnetic bead-based detection results from a single detection area, a single blood sample, and a single detection operation. It enables real-time dynamic detection of the magnetic bead coagulation curve and the viscosity of the blood sample, and features higher detection and analysis efficiency, lower cost, higher accuracy, and more comprehensive results.

The invention relates to a method for tracking the pose of a receiver (24) relative to a transmitter (22), the method comprising obtaining a raw magnetic measurement, estimating a contribution of a perturbing element (90) to the raw magnetic measurement, calculating a refined magnetic measurement by subtracting the contribution of the perturbing element (90) from the raw magnetic measurement, and inferring a refined pose of the receiver (24) relative to the transmitter (22) from the refined magnetic measurement. The contribution of the perturbing element (90) is estimated from secondary current densities of eddy currents induced by the transmitter (22) in the perturbing element (90), the secondary current densities resulting from an interpolation of primary-current-density components of the eddy currents along different directions and at different points on a surface (94) of the perturbing element (90).

An apparatus configured to generate an oscillating magnetic field having a frequency of between 2 kilohertz and 1 megahertz in a target region, the target region defining a length direction. The apparatus comprises: a sheet conductor extending in the length direction between a distal end and a proximal end, and around the target region to provide a wall of the target region surrounding at least 75% of a cross-section through the target region, the cross-section transverse to the length direction, and the sheet conductor having a first end separated from a second end thereof, the first end and the second end extending in the length direction between the distal end and the proximal end and defining a separation region therebetween; and one or more capacitors, distinct from the sheet conductor, and electrically connected to the sheet conductor at the first end and the second end, and across the separation region. The sheet conductor is configured to function as an inductor and, in combination with the one or more capacitors, to form a tank circuit, to thereby generate an oscillating magnetic field in the target region when the tank circuit is driven at a resonant frequency of the tank circuit. The apparatus comprises a distal flared portion at the distal end of the sheet conductor, flared outwardly relative to an intermediate portion of the sheet conductor between the distal end and the proximal end.

The three-dimensional on-chip magnetic sensor includes first, second, and third coils. The first and second coils each include a planar spiral formed by a metal layer and metal vias. Each planar spiral of the first coil includes a plurality of interconnected first loops wound around a first axis, with adjacent first planar spirals electrically connected to each other. Each planar spiral of the second coil includes a plurality of interconnected second loops wound around a second axis, with adjacent second planar spirals electrically connected to each other. The third coil has a planar spiral including a plurality of interconnected third loops wound around a third axis. Each conductive coil is configured to generate a respective electromagnetic force (EMF) induced by an oscillating magnetic field, and each EMF drives a respective alternating current (AC) through a respective readout circuit. Each readout circuit is configured to detect the magnitude of a respective peak voltage of each AC.

The present invention relates to an inductive position sensor (1) for a rotating electrical machine comprising a plastic housing (30) in which is disposed a printed circuit board having at least one transmitting element for emitting an oscillating magnetic field, and at least one receiving device for detecting a modified magnetic field, the sensor comprising a shielding system (50) formed by at least one shielding piece (51) assembled on the outer surface of the plastic housing (30) by a fastening element (52) inserted into an opening (53). Fig. 1.

The present invention relates to an inductive position sensor (1) for a rotating electric machine, the sensor having a printed circuit board (12) housed in at least one housing (10, 100, 11, 19, 101, 102, 103, 104, 15), the printed circuit board (12) having, on its main face (120), at least one emission element intended to emit an oscillating magnetic field toward a rotating target (2) in order to generate a modified oscillating magnetic field, and at least one receiving device intended to detect the modified oscillating magnetic field, the sensor having fluid circulation means (16, 17, 18, 166, 165), the fluid circulation means being formed by at least one duct (16, 17, 18), for allowing fluid to circulate into the interior of a rotor shaft (22, X) of the electric machine, the printed circuit board (12) being arranged such that its main face (120) faces the target (2).

The invention discloses a laser welding auxiliary device, a laser welding system and a laser welding method, and relates to the technical field of laser welding, the laser welding auxiliary device comprises a base, a supporting seat, a magnet exciting coil and a magnet exciting power source, the base is used for moving in the direction close to or away from a welding part in the transverse direction so as to change the transverse distance from the base to the welding part, and the supporting seat is used for supporting the base; the position of the base can be locked, a first end of the supporting seat is hinged to the base, a second end of the supporting seat is fixedly connected with the excitation coil, the first end of the supporting seat rotates around the base so that the inclination angle of the center line of the excitation coil can be changed, the first end of the supporting seat can be locked to the base, and the excitation power source is electrically connected with the excitation coil. The excitation power supply can supply power to the excitation coil, so that the excitation coil generates an oscillating magnetic field, and a welding part is arranged in the oscillating magnetic field; the method can reduce or eliminate SiC particle aggregation on a crystal interface at the center of the welding seam.

A method is presented that includes trapping a charged particle at a first location using an electromagnetic trap and providing a static magnetic field at the first location such that a quantum bit transition of the charged particle is confined and providing an oscillating magnetic field using an entangling electrode. The oscillating magnetic field present at the first location does not contain a polarization component that directly couples to the quantum bit transition. At the first location, the oscillating magnetic field has a spatial gradient of the polarization component of the oscillating magnetic field that couples the quantum bit transition to a motion of the charged particle.

The application relates to the technical field of micro-nano robots, in particular to a magnetic driving micro-nano robot chain cluster regulation and control method suitable for an air environment. The chain cluster regulation method is as follows: a rotating magnetic field is formed in a vertical plane by applying a vertical direction cosine alternating magnetic field and a horizontal direction sine alternating magnetic field, micro-nano robots are gradually assembled into a long chain cluster, and the length of the chain cluster can be dynamically regulated by adjusting an initial mass, a magnetic field frequency and a strength. The cargo transportation control method is as follows: a magnetic field formed by superimposing an xoy plane fan-shaped oscillating magnetic field and an alternating reverse z-direction direct-current magnetic field is applied, so that the chain cluster body swings in a conical surface and moves forward alternately, a propelling force is applied to the cargo, and therefore controllable transportation and displacement of the cargo are realized.

The invention relates to the technical field of anisotropic bonded magnets, in particular to an anisotropic bonded magnet and a preparation method thereof, and the preparation method of the bonded magnet comprises the following steps: S1, mixing magnet raw materials; s2, filling a magnet mold with the mixed magnet raw materials, and pressing in a direct-current magnetic field to form a prefabricated blank; demagnetizing the prefabricated blank in a pulsed magnetic field, wherein the peak field intensity of the pulsed magnetic field is 2-4T; and S3, demolding and curing to obtain the anisotropic bonded magnet. The magnet completes orientation in the direct-current magnetic field according to the magnetic field direction, under the high-frequency oscillation magnetic field of the pulsed magnetic field, the magnetic field is continuously reduced along with current changes, the magnetism of the magnet is gradually reduced, and sufficient demagnetization of the magnet can be achieved. According to the invention, full orientation of the magnet is ensured, the orientation degree of the magnet is prevented from being damaged during demagnetization, the magnet keeps high orientation degree after demagnetization, long demagnetization time in a direct-current magnetic field is avoided, and the production efficiency is greatly improved.

The present invention relates to an inductive position sensor (1) for a rotating electrical machine comprising a printed circuit board (10) with two substrates (101, 102) on which are arranged at least one transmitting antenna (11) for emitting an oscillating magnetic field towards a rotating coupling element (20) to generate a modified magnetic field, and at least one receiving antenna (12) for detecting the modified magnetic field. At least one receiving antenna (12) is disposed inside at least one transmitting antenna (11), at least one signal processing unit (13) is placed inside one of the transmitting (11) and / or receiving (12) antennas, and at least one linking element (14) from at least one transmitting antenna (11) to at least one signal processing unit (13) passes through an area of ​​the receiving antenna (12) without crossing the receiving antenna. Fig. 6a.

The present invention relates to an inductive position sensor (1) for a rotating electrical machine comprising a printed circuit board (12) housed in at least one enclosure (10, 100, 11, 19, 101, 102, 103, 104, 15), having on its main face (120) at least one emitting element for emitting an oscillating magnetic field towards a rotating target (2) to generate a modified oscillating magnetic field, and at least one receiving device for detecting the modified oscillating magnetic field, the sensor comprising fluid circulation means (16, 17, 18, 166, 165) for allowing the circulation of a fluid into the interior of a rotor shaft (22, X) of the electrical machine formed by at least one conduit (16, 17, 18), the printed circuit board (12) being arranged so that its main face (120) is in vis-à-vis the target (2). Figure 1.

The invention relates to an inductive position sensor (1) for a rotating electrical machine, comprising: a printed circuit board (10) on which is arranged at least one emitting element (11) intended to emit an oscillating magnetic field towards a rotating target in order to generate a modified magnetic field; and at least one receiving device (12) intended to detect said modified magnetic field, characterized in that said inductive position sensor is configured to form at least part of a housing (14) of the electric machine.

A structure includes at least one panel for supporting a food product, the at least one panel formed from a laminate structure having a base layer, a conductive layer, and a surface film. The structure further includes at least one spacing feature extending downward from the at least one panel for supporting the at least one panel a distance above an induction source for attenuating heat transferred to the food product in response to an oscillating magnetic field interacting with the conductive layer of the laminate structure.

The invention relates to an inductive position sensor (1) for a rotating electrical machine, comprising: a printed circuit board (12) on which at least one emitting element (13) is arranged, the emitting element being intended to emit an oscillating magnetic field towards a rotating target (2) in order to generate a modified oscillating magnetic field; and at least one receiving device (14) intended to detect a modified oscillating magnetic field, in which the inductive position sensor (1) is configured to allow a fluid to flow into the interior of the rotor shaft (31) of the electric machine (3).

The present invention relates to an inductive position sensor (1) for a rotating electrical machine comprising a printed circuit board on which are arranged at least one emitting element for emitting an oscillating magnetic field towards a rotating target to generate a modified oscillating magnetic field, and at least one receiving device for detecting the modified oscillating magnetic field, the sensor being housed in at least one casing (10), characterized in that it comprises means (180, 181, 182, 183) for circulating fluid to allow the circulation of a fluid to the inside of a rotor shaft of the electrical machine via at least one channel (17). Figure 7.

The invention provides a method (100) for controlling an electric motor (30) of a centrifugal separator (1) for cleaning a gas containing contaminants. A centrifugal separator (1) comprises a stationary casing (2) enclosing a separation space (3) through which a gas flow is permitted; a rotatable member (7) comprising a plurality of separation members (9) arranged in the separation space (3) and arranged to rotate about a rotation axis (X). The electric motor (30) comprises a stator (31) and a rotor (32) and is arranged for rotating the rotatable part (7). The method (100) comprises the step of controlling (101) the stator (31) to expose the rotor (32) to a first oscillating magnetic field that increases the temperature of the surroundings of the electric motor (31) without rotating the rotor (32).

A compact includes a lower portion, an upper portion, a first mirror, a battery, a circuit, and a coil. The upper portion is movably coupled to the lower portion by a hinge such that the upper portion rotates about the hinge to transition from a closed state to an open state. The first mirror is disposed in the lower portion such that the first mirror is visible when the upper portion is in the open state. The battery is disposed within the lower portion. The circuit is electrically coupled to the battery. The coil is disposed within the upper portion and electrically coupled to the circuit such that the coil produces an oscillating magnetic field when electric power is provided to the coil by the battery and through the circuit.

The invention relates to an inductive position sensor (1) for a rotating electrical machine, the sensor comprising a first substrate (2a) containing at least one transmitting element configured to transmit an oscillating magnetic field towards a rotating target to produce a modified oscillating magnetic field, and a receiving device configured to receive the modified oscillating magnetic field from the first substrate (2a), the receiving device is configured to detect the modified oscillating magnetic field and transmit it to a signal processing unit to determine an angular position of the target. The signal processing unit is located on the second substrate (2b), is spaced apart from the first substrate (2a), and is connected to the first substrate (2a) by connection means (4) configured to transmit the modified oscillating magnetic field to the signal processing unit.

A microrobot device and targeted transport method for liquid environments are disclosed. This invention relates to the field of micromanipulation control. It includes paired coils in the X, Y, and Z directions, a camera clamp, a microscope camera, a camera base, a camera support, a vibration isolation table, a Y-direction coil clamp, a crossbeam, an X-direction coil clamp, an operation box, a Z-direction coil clamp, a support platform, a support frame, a four-jaw clamp, a neodymium iron boron coating, a flexible shell, a magnetic ring, flexible flagella, micro-components, and positioning holes. An external current excites the coil group to generate an oscillating magnetic field, a gradient magnetic field, and a uniform magnetic field. The oscillating magnetic field provides torque to the microrobot, driving it to oscillate forward while carrying the micro-components. In the gradient magnetic field, the four-jaw clamp separates from the flexible shell, releasing the micro-components. After the four-jaw clamp degrades, the micro-components are released to the target position. Finally, under the action of the uniform magnetic field, the microrobot floats to the surface and is recovered. This invention is used for efficient, controllable, and integrated transport and release of micro-components.

A construct includes at least one panel for supporting a food product, the at least one panel formed from a laminate structure having a base layer, a conductive layer, and a surface film. The construct further includes at least one spacing feature extending downwardly from the at least one panel for supporting the at least one panel a distance above an induction source for attenuating heat transferred to the food product in response to an oscillating magnetic field interacting with the conductive layer of the laminate structure.

An electrochemical cell includes a membrane electrode assembly having an electrode catalyst material including a plurality of catalyst nanoparticles at least some of which include a magnetic material and an AC magnet generating oscillating magnetic field adjacent the catalyst material, the oscillating magnetic field having a frequency of up to 500 KHz.