105 results about "Oscillating magnetic field" patented technology

The invention provides an eddy current sensor, a detection device and an electric driving system, and the sensor comprises an eddy current rotor, one end of which is connected with a rotating shaft of a to-be-detected motor and rotates synchronously; one end of the printed circuit board assembly is an electromagnetic induction area, the exciting coil and the receiving coil are arranged in the electromagnetic induction area, the receiving coil is distributed on the inner side of the exciting coil, the other end of the eddy current rotor is close to the electromagnetic induction area to form a preset air gap distance, and the eddy current control module is arranged at the other end of the printed circuit board assembly. The eddy current control module is connected with the excitation coil to form a high-frequency oscillation magnetic field and is connected with the receiving coil to receive the induced electromotive force. The design is compact, the size is greatly reduced, light weight is achieved, and the installation space and the manufacturing cost are reduced.

The invention relates to a sensor arrangement and a measuring method for measuring the respective concentrations of three gas components in a gas sample (Gp). One gas component is a paramagnetic gas. The gas sample (Gp) is passed through a measuring chamber (2). A magnetic field with an oscillating magnetic field strength is applied to the measuring chamber (2). The thermal conductivity of the gas sample (Gp) and the magnetically modulated thermal conductivity of the gas sample in the measuring chamber (2) are measured. The three concentrations of the three gas components are determined using predetermined densities of the three gas components, as well as the measured thermal conductivity, the measured magnetically modulated thermal conductivity, and the measured density.

The invention relates to the technical field of micro-nano robots, in particular to a magnetically-driven micro-nano robot chain cluster regulation and cargo transportation control method suitable for an air environment. According to the chain cluster regulation and control method, a rotating magnetic field is formed in a vertical plane by applying a vertical cosine alternating magnetic field and a horizontal sine alternating magnetic field, the micro-nano robot is driven to gradually assemble a long chain cluster, and the length of the chain cluster can be dynamically regulated and controlled by adjusting the initial mass, the magnetic field frequency and the intensity. The cargo transportation control method comprises the following steps: applying a magnetic field formed by superimposing an xoy plane fan-shaped oscillating magnetic field and an alternate and reverse z-direction direct-current magnetic field, enabling a chain-shaped group to alternately swing in a conical surface and realize forward movement, and simultaneously applying a pushing force to cargoes, thereby realizing controllable transportation and displacement of the cargoes.

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 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 invention discloses a niobium material workpiece welding machining control method and device.The niobium material workpiece welding machining control method comprises the steps that a main magnetic field is applied to a welding joint, and a pulse magnetic field and a first oscillation sound field are superposed to form a composite physical field; performing preheating treatment and high-frequency oscillating magnetic field regulation and control under the action of a composite physical field; a quasi-steady-state organization structure with chain-shaped-grid arrangement characteristics is formed through electron beam welding; adjusting field parameters according to a preset change rate to realize tissue transformation control; finally, tissue optimization is conducted through the combined action of the pulsed magnetic field and low-frequency sound vibration. According to the technical scheme, through the synergistic effect of a composite physical field, uniform control over grain orientation of a welding seam area is achieved, formation of a large-angle grain boundary is effectively restrained, and the stability of the superconducting performance of a welding joint in an extremely low-temperature environment is guaranteed.

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 method is presented, which includes trapping a charged particle at a first position using an electromagnetic trap and providing a static magnetic field at the first position such that a qubit transition of the charged particle is defined, and providing, using an entangling electrode, an oscillating magnetic field. The oscillating magnetic field present at the first position does not contain a polarisation component which directly couples to the qubit transition. The oscillating magnetic field has a spatial gradient at the first position, of the polarisation component of the oscillating magnetic field which couples the qubit transition to the motion of the charged particle.

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 discloses a damping oscillating magnetic field test device with adjustable intensity, which relates to the technical field of magnetic force test detection. It includes a test frame and also includes a protection device. Among them, a damping oscillating magnetic field interference generator is arranged on the front side of the test frame, a magnetic field sensor is arranged on the left side of the test frame, and a temperature control device is arranged on the right side of the damping oscillating magnetic field interference generator. Among them, the protection device includes a test hole, a shielding rod, an L-shaped plate, a separation plate, a hollow frame, a T-shaped rod and a protection plate. The protection plate moves backward to contact the top of the L-shaped plate and limit the L-shaped plate. The test hole is opened on the right side of the test frame, and the shielding rod is fixedly installed on the top of the test frame. By limiting the L-shaped plate with the protection plate, the test frame during the test can be prevented from being opened, the test conditions can be kept stable, and thus the reliability and accuracy of the test detection data can be ensured.

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-generating article (101) is described. The aerosol-generating article (101) comprises: a housing (103) extending along a first axis; a material portion (113) disposed within the housing, wherein the material portion includes a substrate (105) for generating an aerosol and one or more inductively heatable susceptors (107) for heating the substrate (105); and a conductive ring (111) spaced apart from the material portion (113) along the first axis and configured to generate a reverse magnetic field aligned relative to the oscillating magnetic field when there is an oscillating magnetic field substantially aligned along the first axis.

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.

Mineral detection arrangement for borehole eigenfield resonance spectroscopy comprising a housing (1) suitable for insertion into a borehole (2), and external electronics (3a) located outside the borehole (2) and electronically connected to internal electronics (3i) in the housing (1), wherein a probe (11) is located inside the housing (1), characterized in that • the probe (11) is an intrinsic field resonance probe (11) which consists of probe electronics (111) and an antenna (112) and • an oscillating magnetic field of suitable frequency can be emitted by the antenna (112), which in the radial direction, in the plane perpendicular to the longitudinal axis of the borehole (2) has a low radial location dependence close to the theoretical optimum, which in a region of the vicinity of the antenna (112), which is directly adjacent to the surface of the antenna (112), has a proportionality between the magnetic field amplitude and the inverse of the radial distance B1 ~ 1 / r.

The invention relates to an electromagnetic driving system which is used for solving the problem that different magnetic field modes are needed clinically to assist in drug delivery, but in the prior art, it is difficult to use one electromagnetic driving system to generate different magnetic field modes. According to the micro-robot magnetic control system with the extensible spherical large working space, modular mechanical design is adopted, and an enhanced gradient magnetic field, a uniform magnetic field, a rotating magnetic field, an oscillating magnetic field and a dispersed gradient magnetic field can be generated in the spherical space; therefore, the micro-robots in any form and number can be conveniently controlled to deform and move, and the medicine is conveyed to the corresponding position of the human body.

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 generating article includes a shell that extends along a first axis; a material part disposed inside the shell, wherein the material part includes a substrate for generating an aerosol and one or more inductively heatable susceptors for heating the substrate; and a conductive loop that is spaced from the material part along the first axis and is configured to produce, when in the presence of an oscillating magnetic field aligned substantially along the first axis, a reverse magnetic field aligned oppositely to the oscillating magnetic field.

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 system comprises a cleaner head 100 that includes a roller 114 and is configured to apply a fluid to the roller. The system further comprises a heating arrangement configured to cause heating of at least one of the roller and fluid applied to the roller. The heating arrangement comprises a first electrically conductive element 150 and an electronic circuit configured to generate an oscillating electric current in the first electrically conductive element to generate at least one of an oscillating magnetic field and an oscillating electric field, such that the at least one of the oscillating magnetic field and the oscillating electric field causes heating of at least one of the roller and fluid applied to the roller. The fluid applied to the roller can be heated dielectrically. The heating arrangement can be provided in the cleaner head or in a dock 160.

The invention relates to a method for determining at least one component of the positioning of a receiver (24) relative to a transmitter (22), the transmitter (22) comprising at least two magnetic generators (30, 32, 34), the method comprising the following steps: - measuring a resulting magnetic field; - demodulating the measurement signal so as to determine a plurality of candidate measurements; - applying, to each candidate measurement, a correction that aims to compensate for a directional orthogonality defect in the magnetic generators (30, 32, 34) so as to obtain a corresponding corrected measurement; - calculating a value representative of the likelihood that this candidate measurement reflects the actual contributions of each alternating magnetic field; - selecting a selected measurement corresponding to the highest likelihood; and - determining the at least one component of the positioning of the receiver (24).

Disclosed is a system comprising a cleaner head. The cleaner head comprises a roller and is configured to apply a fluid to the roller. The system comprises a heating arrangement configured to cause heating of at least one of the roller and fluid applied to the roller. The heating arrangement comprises a first electrically conductive element and an electronic circuit configured to generate an oscillating electric current in the first electrically conductive element to generate at least one of an oscillating magnetic field and an oscillating electric field, such that the at least one of the oscillating magnetic field and the oscillating electric field causes heating of at least one of the roller and fluid applied to the roller.

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 document describes methods and systems for exciting magnetic resonance in a sample using trains of pulsed, oscillating magnetic fields that are modulated in their phase and amplitude according to a source waveform derived from the known or estimated magnetic response of a sample. Also disclosed are methods and systems for acquiring a response signal from the sample wherein data acquisition events are synchronized or interleaved with said modulated pulse trains. Further disclosed are methods and systems for identifying one or more of the presence, absence, amount, and concentration of a target substance in a sample. Also disclosed is a magnetic resonance device which uses such pulse trains and synchronized acquisition to improve the selectivity of magnetic resonance data.

The present invention provides an aerosol delivery device comprising at least one housing enclosing a reservoir configured for holding an aerosol precursor composition; and a heating element controllable to activate and vaporize components of the aerosol precursor composition. The aerosol delivery device further comprises: a power source connected to the electrical load and configured to provide power to the electrical load comprising the heating element; and an inductive receiver connected to the power source, the inductive receiver comprising: a resonant receiver coupling device that causes an alternating current when exposed to the oscillating magnetic field; and a rectifier configured to convert an alternating current into a direct current from which the power source is rechargeable.