59 results about "Oscillating magnetic field" patented technology

The present invention relates to an inductive position sensor (1) for a rotating electrical machine comprising a printed circuit board (10) on which are arranged at least one emitting element (11) for emitting an oscillating magnetic field towards a rotating target to generate a modified magnetic field, and at least one receiving device (12) for detecting the modified magnetic field, characterized in that it is configured to form at least a part of the hood (14) of an electrical machine. Figure 2.

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 transmitting element intended to transmit an oscillating magnetic field towards a rotating target to generate a modified oscillating magnetic field, and at least one receiving device intended to detect the modified oscillating magnetic field, the sensor being housed in at least one housing (10), characterized in that it comprises means (180, 181, 182, 183) for circulating the fluid to allow the circulation of a fluid to the interior of a rotor shaft of the electrical machine via at least one channel (17). Figure 7.

The present disclosure relates to an electromagnetic driving system for solving the clinical need for different magnetic field modes for assisting drug delivery, while the prior art is difficult to generate different magnetic field modes using one electromagnetic driving system. The present disclosure proposes a micro-robot magnetic manipulation system with an expandable spherical large working space, which adopts a modular mechanical design and can generate gradient magnetic fields, uniform magnetic fields, rotating magnetic fields, oscillating magnetic fields, and dispersed gradient magnetic fields in the spherical space, thereby facilitating the manipulation of the deformation and movement of micro-robots of any shape and quantity, and delivering drugs to the corresponding positions in the human body.

A controller causes performance of a shelving operation by causing, at an initial time, a dressing field source to provide a dressing field characterized by a dressing field frequency that is detuned from a transition frequency corresponding to a transition between a qubit state and a shelving state of the quantum object. The controller causes a magnetic field source to provide an oscillating magnetic field oscillating with a magnetic field frequency that corresponds to a first dressed frequency. The controller causes the magnetic field source to stop providing the oscillating magnetic field; and at a final time, the dressing field source to stop providing the dressing field. At the final time, at least one of a population of the qubit state at the initial time has been transferred to the shelving state or a population of the shelving state at the initial time has been transferred to the qubit state.

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.

An aerosol delivery device includes a substrate (610) configured to carry an aerosol precursor composition, and a resonant transformer (1202) including a transmitter coupling device (302) and a resonant receiver coupling device (602) proximate the substrate. The aerosol delivery device also includes a pulse width modulation (PWM) inverter (1204) configured to drive the resonant transformer. The PWM inverter includes a bridge circuit (1206) coupled to the transmitter coupling device, and a PWM controller (1208) embodied as an integrated circuit and configured to output a PWM signal to the bridge circuit configured to drive the transmitter coupling device to generate an oscillating magnetic field and induce an alternating voltage when the resonant receiver coupling device is exposed to the oscillating magnetic field. The alternating voltage induces the resonant receiver coupling device to generate heat and thereby vaporize components of the aerosol precursor composition.

The utility model provides underground water sampling equipment for environmental monitoring, which comprises a controller main body, a shell cover is arranged at the bottom of the controller main body in a matched manner, a rope winding and unwinding mechanism is arranged in the shell cover, a cable is wound on the rope winding and unwinding mechanism, and a sampling box is arranged at the end part of the cable. According to the equipment, underground water sampling can be achieved, particularly multiple times of fixed-depth sampling can be achieved so as to achieve a better sampling effect, the driving motor achieves rotation of the retractable frame body through transmission so as to achieve lowering of the mooring rope, and when the floating ball makes contact with underground water, the floating ball can rise due to buoyancy; when an iron ring in the floating ball enters an oscillating magnetic field generated by the inductance type proximity sensor, the characteristics of the magnetic field are changed, so that the inductance type proximity sensor is reminded that metal exists, an electric signal output by the inductance type proximity sensor determines that the sampling box is located at a certain accurate position, the electromagnetic valve is controlled to be switched on, and the sampling box is started. And underground water enters the independent liquid storage chamber, so that the sampling purpose is achieved.

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.

The present invention relates to the field of thermal science, and in particular to a method for reconfigurable dynamic control of microscale thermal fields based on magnetic micro-nano robot clusters and a thermal encoding device. The method comprises the following steps: S1. Under the action of an ultrasonic field, the micro-nano robots are suspended and form a circular cluster; S2. An oscillating magnetic field is applied, causing the micro-nano robot cluster to transform from a circular shape into a gear shape; S3. Near-infrared light with a wavelength of 808 nm is used to illuminate the micro-nano robot cluster area, causing the micro-nano robot cluster to exhibit a thermal effect; and S4. The micro-nano robot cluster morphology is controlled by controlling the ultrasonic field and magnetic field characteristic parameters, thereby achieving reconfigurable dynamic control of the microscale thermal field within the cluster area. The thermal encoding device comprises a thermal imager, a near-infrared light source, a magnetic field generator, and an ultrasonic field generator. The present invention can achieve reconfigurable dynamic control of the microscale thermal field and can transmit information using 8-bit ASCII code through encoding and decoding processes.

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).

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 invention relates to an improved mute multi-gradient echo magnetic resonance imaging system and method. Methods and systems for generating muted multi-gradient echo magnetic resonance images include employing iterative applications of small updates to the magnetic field gradient followed by short non-selective radio frequency pulse excitation, and for free induction decay data acquisition. Updating of the magnetic field gradient allows for a muted self-refocusing pulse sequence. Each magnetic field gradient is based in part on a k-space spoke. A closed k-space trajectory is generated when multiple spokes are cascaded, which results in a self-refocusing pulse sequence. The k-space spokes in the k-space spoke sequence forming the closed k-space trajectory oscillate inside and outside the plane of the frequency space. Subsequent application of the magnetic field gradient allows multiple echo data acquisition.

The present invention relates to an inductive position sensor (1) for a rotating electrical machine comprising a printed circuit board (12) on which are arranged 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, characterized in that it is configured to allow the circulation of a fluid into the interior of a rotor shaft (31) of the electrical machine (3). Figure 2.

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 present invention relates to an inductive position sensor (1) for a rotating electrical machine comprising a printed circuit board (10) with two substrates (13, 14) on which are arranged at least one transmitting element (11) for emitting an oscillating magnetic field towards a rotating coupling element (20) to generate a modified magnetic field, and at least one receiving device (12) for detecting the modified magnetic field. The connections between the at least one transmitting element and the at least one receiving element to at least one signal processing element are made with conductive elements (101, 102) located on a region (30) different from that (40) where the transmitting elements (11) and receiving elements (12) are located. The sensor comprises a ground plane (17) positioned on the region (30) of the conductive elements so as to extend to the region (40) of the transmitting elements (11) and receiving elements (12). Fig. 2.

A system, method, and apparatus is configured to treat MGD by applying resistive heating and magnetic-based mechanical stimulation of the eyelid. The system includes an underlid device configured to be inserted on the surface of the eye under the eyelid, and a stimulator wand configured to be held by the user on or adjacent to the eyelid in the area of the underlid device. The stimulator wand generates radio frequency (RF) energy that is used to induce an electric current in the underlid device, which is used to excite resistive heating elements that generate heat for heating the meibomian glands. The stimulator wand also generates an oscillating magnetic field that attracts ferromagnetic elements on the underlid device and induces oscillatory movement in the underlid device. The oscillatory movement of the underlid device applies a massaging motion to the meibomian glands while, at the same time, heating the glands via the heating elements.

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.

An apparatus, for generating external magnetic fields for supporting a melt pool, adapted for use in direct energy deposition based additive manufacturing processes, comprising a first control means and at least one magnet, wherein the first control means is connected to the at least one magnet such that the magnet generates an oscillating magnetic field at and / or inside the melt pool such that an eddy current is induced, and wherein a resulting current is oriented to the oscillating magnetic field such that a Lorentz force acts on the melt pool.

The invention provides an oscillation detection method and an oscillation detection device. The oscillation detection method comprises the following steps: generating an oscillation magnetic field through an oscillation generation device; the oscillation generating device is arranged on an object to be detected; continuously collecting real-time speed information of the to-be-detected object in the oscillation process; performing data processing on the real-time speed information to obtain a pose state oscillogram of the to-be-detected object in the oscillation process; the pose state oscillogram comprises the oscillogram of pitch angle information and roller angle information of the to-be-detected object in the oscillation process. In the embodiment of the invention, the real-time speed information of the to-be-detected object can be continuously detected through the measuring unit to obtain the pose state oscillogram of the to-be-detected object in the oscillation process, so that people can read whether the rotation center and the mass center of the permanent magnet deviate and cause vibration or not through the pose state oscillogram; and whether resonance exists between the oscillator and the helmet or not is judged, so that the vibration phenomenon and the resonance phenomenon can be eliminated.

The invention provides a high-frequency microwave frequency source and communication equipment, and relates to the technical field of frequency sources. The frequency source comprises a laser, a diamond color center, a gain medium ring, a resonant cavity, a superconducting magnet coil, an antenna and a DDS. The diamond color center is arranged in the gain medium ring, and the axial direction is perpendicular to the direction of an oscillating magnetic field of the gain medium ring; the gain medium ring is arranged in the resonant cavity, and the axial direction of the diamond color center is perpendicular to the magnetic field direction of the resonant cavity; the resonant cavity is arranged in the superconducting magnet coil, and the axial direction of the diamond color center is parallel to the magnetic field direction; laser emitted by the laser device is incident along the axial direction of the diamond color center; the input end of the DDS penetrates through the side wall of the resonant cavity and is connected with an antenna arranged in the resonant cavity, and the output end of the DDS is used for outputting terahertz signals. Terahertz signals are generated by means of the stimulated radiation phenomenon caused by Zeeman splitting in the diamond color center, the power is large, the signal-to-noise ratio is high, and the stability is good.

An ultrasonic sensor installable to a vehicle includes a magnetic body capable of ultrasonic vibration and an electric-magnetic converter having a conversion function between an oscillating magnetic field corresponding to the ultrasonic vibration of the magnetic body and an electric signal. The magnetic body is located on an outer surface side of an outer plate of the vehicle, which is the surface facing an external space of the vehicle. The electric-magnetic converter is located to face the magnetic body with the outer plate interposed therebetween on an inner surface side, which is a back surface of the outer surface of the outer plate.

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).