29 results about "Induction field" patented technology

The invention relates to the technical field of high-precision positioning, in particular to a high-precision six-degree-of-freedom magnetic positioning system and method, and the method comprises the steps: generating a three-dimensional low-frequency magnetic induction field with a preset frequency in a space through a three-axis orthogonal transmitting coil; detecting the three-dimensional low-frequency magnetic induction field through a three-axis orthogonal receiving coil to obtain an induced voltage signal; transmitting the digitized induced voltage signal to a control layer; in the control layer, the position and attitude of the receiver are estimated in real time by using a joint estimation algorithm fusing error state extended Kalman filtering and particle swarm optimization; the error state extended Kalman filtering comprises the steps of constructing a state transition matrix F of a target carrying a receiver, and constructing a process noise covariance matrix Qk and a parameterized measurement noise covariance matrix R of the system through translation acceleration noise sigma a and rotation noise sigma omega. According to the invention, the PSO module is utilized to dynamically and adaptively adjust the key parameters of the ESKF, and high-precision positioning and low-delay response are realized.

The application discloses a kind of ocean stereo magnetic survey system and method based on unmanned platform, belong to marine detection equipment technical field, including water surface magnetic transverse gradient measurement subsystem, underwater magnetic total field measurement subsystem, ground magnetic diurnal variation observation station and data synchronization and compensation processing center.Processing center, built-in improved 18 items Tolles-Lawson magnetic interference compensation model, real-time solution and eliminate platform constant field, induction field and eddy current field interference.The application is realized through the cooperation of combined navigation and automatic roll reduction device, attitude depth adjustment mechanism, water surface / underwater platform high-precision attitude positioning and attitude keeping;After diurnal variation correction, attitude correction and position calculation, water surface transverse magnetic gradient and vertical magnetic gradient are solved, and water surface-underwater stereo magnetic survey cooperative operation and high dynamic platform magnetic interference real-time compensation are realized, which significantly improves the precision, efficiency and spatial resolution of marine magnetic anomaly detection.

Tabletop device (106) for an induction device (100), wherein the tabletop device (106) is a A support surface (112) for placing a cooking vessel (110) on the countertop device (106), at least one induction coil (200, 202) shaped to provide an output magnetic field for heating the support surface (112) using an input magnetic field of an induction field of the induction device (100), and a sensor device (114) with at least one force sensor for detecting a pressure acting on the countertop device (106), wherein the sensor device (114) is configured to provide a pressure signal representing the pressure.

An electrostatic spray nozzle assembly is described that includes an induction ring and a fluid tip. The induction ring generates an electrical field for inducing an electrical charge on droplets of a feedstock liquid from the fluid tip that pass through an opening of the induction ring. The induction ring is electrically coupled to an electrical induction field source via a first conductive path comprising at least an electrically conductive pliable structure, such as a stainless steel spring. Feedstock flowing through the fluid tip is electrically coupled to a charge carrier source via a second conductive path provided by at least a conductive surface of a fluid tube coupled to the fluid tip. The first conductive path and the second conductive path are electrically isolated by an insulating barrier.

The invention relates to a trivet (106) for a cooking vessel (110), wherein the trivet (106) has a support section (112) for supporting the cooking vessel (110), a plurality of holding elements (114) for holding the cooking vessel (110) on the support section (112) and a transmission unit (116) which is shaped to generate an output magnetic field for heating the cooking vessel (110) using an input magnetic field of an induction field.

An electrostatic spray nozzle assembly is described that includes an induction ring and a fluid tip. The induction ring generates an electrical field for inducing an electrical charge on droplets of a feedstock liquid from the fluid tip that pass through an opening of the induction ring. The induction ring is electrically coupled to an electrical induction field source via a first conductive path comprising at least an electrically conductive pliable structure, such as a stainless steel spring. Feedstock flowing through the fluid tip is electrically coupled to a charge carrier source via a second conductive path provided by at least a conductive surface of a fluid tube coupled to the fluid tip. The first conductive path and the second conductive path are electrically isolated by an insulating barrier.

A device (4) for continuously magnetically detecting a defect in a moving metal reinforcing element (1) is proposed. The device comprises: - first magnetising means (5) configured to generate a continuous first magnetic induction field so as to magnetise the moving reinforcing element (1), - detecting means (6) configured to detect at least one magnetic-flux variation generated by the occurrence of a defect in the moving reinforcing element (1) and deliver a raw signal representative of the magnetic-flux variation, and - comparing means (13) configured to compare a detection signal with a predetermined detection threshold representative of a defect, the detection signal being determined based on the raw signal, and determine the presence of at least one defect of the reinforcing element (13) based on the result of the comparison.

The application discloses a membrane pollution trend identification and pre-maintenance method, and belongs to the technical field of water treatment. The method comprises the following steps: injecting a functionalized tracer into water flowing into a membrane system; applying a non-contact external induction field to stimulate a complex formed by the tracer and pollutants; detecting a characteristic induction signal; analyzing a pollution enrichment characteristic parameter; calculating a dynamic enrichment trend index; and triggering a pre-maintenance operation according to the index breaking through a threshold. The functionalized tracer is combined with the non-contact external induction field to stimulate the complex, and the characteristic induction signal of the complex is detected. The pollution enrichment characteristic parameter is analyzed from the signal, the dynamic enrichment trend index is calculated, and the pre-maintenance operation is triggered according to the index. Early warning, targeted identification and predictive maintenance of membrane pollution can be realized.

A device (4) for the continuous magnetic detection of a defect in a moving metallic reinforcement element (1) is proposed. The device comprises: - first magnetization means (5) configured to generate a first continuous magnetic induction field so as to magnetize the moving reinforcement element (1), - detection means (6) configured to detect at least one change in magnetic flux generated by the occurrence of a defect in the moving reinforcement element (1) and to deliver a raw signal representative of the change in magnetic flux, and - comparison means (13) configured to compare a detection signal to a predetermined detection threshold representative of a defect, the detection signal being determined from the raw signal, and to determine the presence of at least one defect in the reinforcement element (13) from the result of the comparison. Figure for the abstract: Fig 3

The invention provides a foundation pit leakage detection device and a leakage judgment and positioning method. The leakage detection device comprises a magnetic excitation well, a magnetic excitation system, magnetic field measurement cloth, a simulated electromagnetic field data processing system and a control analysis system. The magnetic excitation system applies excitation current in the magnetic excitation well; the control analysis system carries out comparative analysis on a measurement result and a simulation result of the magnetic field, and if 90% or more data errors are smaller than 0.05, leakage is judged to be generated; the magnetic excitation system further comprises an electrode, and when leakage is judged through the judgment method, the diaphragm wall seam position corresponding to the depth where the electrode is located is the leakage position. Based on the current magnetic field effect, an original precipitation well is utilized, a large-range magnetic induction field is established, the leakage point position at the joint of the underground diaphragm wall is rapidly found, traditional salvage needle type low-efficiency detection is avoided, and in addition, the detection system can be moved.

The present application relates to the field of nanomaterials, and provides a kind of based on the manipulation method of star chain induction nanorobot cluster, comprising: step S1: pre-configure the composite induction field of nanorobot cluster control;Wherein, composite induction field is driven nanorobot cluster assembly into star chain structure by coarse-grained model and active particle environment;Step S2: according to star chain structure, determine the kinetic parameter of nanorobot cluster;Step S3: according to kinetic parameter, when receiving control instruction, generate the control parameter of active particle in composite induction field;Step S4: according to control parameter, control star chain structure executes the target operation corresponding to operation instruction, and after completing target operation, revoke composite induction field.

A module (110) for an induction device (101) comprises a functional element (114) for providing functionality of the module (110), a receiving coil (116) shaped to provide electrical energy for operating the functional element (114) using an input magnetic field of an induction field (104) of the induction device (101), and a coupling element (118) for mechanically coupling the module (110) with another module (112).

The present invention relates to an electromagnetic induction continuous fluid heating device (2), and more particularly to an automatic beverage vending machine (1). The heating device (2) comprises: a tubular body (8) having a longitudinal axis (A), the tubular body (8) including at least one inlet (10) configured to receive the fluid to be heated and supply it into the interior of the tubular body (8), and an outlet (11) from which the heated fluid flows out of the tubular body (8) when in use; and an electric winding (12) wound around the tubular body (8) and electrically powered to generate an electromagnetic induction field. The tubular body (8) is made of an electrically conductive material to be heated by electromagnetic induction due to the effect of the electromagnetic induction field. The heating device (2) further comprises inserts (18, 118, 218, 318, 418, 518, 618) which engage axially with the tubular body (8) and extend along the longitudinal axis (A). The heating device further comprises flow channel channels (19, 119, 219, 319, 419, 519, 619) for the fluid, which fluidly connect the inlet (10) to the outlet (11) and are partitioned by the outer side surface (18a) of the insert (18) and the inner side surface (8a) of the tubular body (8). The flow channel channels (19, 119, 219, 319, 419, 519, 619) extend around the longitudinal axis (A), and at least a portion of them extend along a zigzag pattern or a zigzag trajectory from the inlet (10) to the outlet (11).

An electrostatic spray nozzle assembly is described that includes an induction ring and a fluid tip. The induction ring generates an electrical field for inducing an electrical charge on droplets of a feedstock liquid from the fluid tip that pass through an opening of the induction ring. The induction ring is electrically coupled to an electrical induction field source via a first conductive path provided by conductive surfaces of: a nozzle head holding the induction ring, and a purge gas tube holding the nozzle head. Feedstock flowing through the fluid tip is electrically coupled to a charge carrier source via a second conductive path provided by at least a conductive surface of a fluid tube coupled to the fluid tip. The first conductive path and the second conductive path are electrically isolated by an insulating barrier.

The application discloses a wireless charging control method and system based on NFC, relates to the technical field of wireless power transmission, and comprises the following steps: S100, before starting the wireless charging device, a dynamic analysis baseline of a multi-source near field communication induction spectrum is constructed, a continuous time domain signal and a frequency domain signal are used to reconstruct an energy flow trajectory, coupled paths, phase shifts and amplitude abnormal data generated in an induction field are extracted, and a holographic reference data surface is generated; S200, based on the holographic reference data surface, interference signal attribution recognition processing is performed, a differential decoupling method is applied to separate feedback signals and interference components, signal consistency weights are calculated according to time sequence continuity, and a misjudgment matrix is generated. The application constructs a holographic reference data surface, introduces a misjudgment matrix and an identity lock frequency mechanism, accurately identifies effective signals, combines counterfactual playback and topology reconstruction, realizes dynamic self-adjustment of a controller, improves anti-interference and charging stability, and guarantees the safe and intelligent operation of multi-device wireless charging.

The invention relates to the technical field of inlaying preparation of mother-of-pearl inlay, and discloses a mother-of-pearl inlaying efficient forming process suitable for a complex curved surface, which comprises the following steps of: obtaining a three-dimensional digital model of a complex curved surface base material and an inlaying pattern of the mother-of-pearl inlay, and generating three-dimensional printing path data; the path data defines a movement track, local layer thickness, a spraying angle and a printing speed of the printing head in a three-dimensional space, and external induction field parameters and in-situ curing parameters of the mother-of-pearl inlay particles are preset; and preparing mother-of-pearl inlay particles with an average particle size of 1-50 microns. A precise three-dimensional model and a printing path of a base material are obtained through high-precision three-dimensional digitization and pattern design, a real-time deformation sensing and path compensation mechanism in intelligent self-adaptive three-dimensional printing and in-situ directional curing is combined, a closed-loop control system can dynamically correct the spraying path of a robot, it is ensured that a mother-of-pearl inlay layer is perfectly attached to the surface of the base material, and the spraying quality of the robot is improved. Therefore, high-precision forming of the mother-of-pearl inlay pattern on any complex curved surface is achieved.

The device (4) for the continuous magnetic detection of at least one defect in a moving metallic reinforcement element (1) comprises a first and a second magnetization coil (5, 6) and a detection coil (7) which together define an internal passage (9) with longitudinal axis (X-X'). The first magnetization coil (5) is configured to generate a first continuous magnetic induction field directed towards the detection coil (7), the second magnetization coil (6) being configured to generate a second continuous magnetic induction field directed towards the detection coil (7). The detection coil (7) is configured to detect a change in magnetic flux generated by the occurrence of a defect in the metallic reinforcement element (1) moving longitudinally in the internal passage (9), the defect in the metallic reinforcement element being detected from the change in magnetic flux. Figure for the abstract: Fig 3

The invention relates to an operating device (110) for a household appliance (130) that can be operated using an induction field (115). The operating device (110) comprises a configurable control element (120) and a control knob box (125). The control element (120) is configured to provide, in response to an identification signal (135) indicating that the household appliance (130) is coupled with the induction field (115), a setting option adapted to the household appliance (130) for adjusting different operating parameters of the household appliance (130) by a user through different actuations of the control element (120). The control knob box (125) is coupled to the control element (120) and configured to detect an actuation of the control element (120) and to output a control signal (140) for operating the household appliance (130) with one of the operating parameters assigned to the actuation.

A current measurement system includes a multiphase open-loop current sensor for measuring phase currents (I1, I2, I3) flowing in a plurality of (n) primary conductors in a multiphase electrical system. The sensor includes: a housing (2); a magnetic core (3) including a first core component (3a) and a second core component (3b); and a plurality of (n+1) magnetic field detectors (4) mounted in the housing (2) between the first core component and the second core component, on a portion of the primary conductors traversing the housing of the current sensor. The system further includes a non-volatile memory and a computing unit storing at least one coupling matrix (K) predefined during calibration, the at least one coupling matrix linking the phase currents (I1, I2, I3) flowing in the primary currents with magnetic induction fields (B1, B2, B3, B4) detected by the magnetic field detectors, the computing unit being configured to use the coupling matrix to calculate the values ​​of the n phase currents using the outputs of the n+1 magnetic field detectors. The computing unit is also configured to use n+1 reduced-order mode coupling matrices to estimate n phase currents in a reduced-order mode, thereby allowing the detection of faults, leakage currents or overcurrents in the magnetic field detector.

The invention relates to a device for charging a cordless hair trimmer, the device comprising a power connector (5) intended to be connected to a charging connector of the trimmer and an electrical circuit for supplying electricity to the trimmer via the power connector (5), wherein an elastic sleeve (1) is intended to surround a grip handle of the trimmer and comprises the power connector (5), at least one induction charging receiver coil (2), and a signal processing region in the form of a converter circuit (3) connected to the receiver coils (2) in order to supply the electricity generated in the receiver coils (2) to the power connector (5). The invention also relates to a system comprising the charging device and a mat for generating an induction field.

The present invention provides an apparatus for indirectly measuring the critical current of a superconducting wire, the apparatus comprising: a temperature control stage (210) in which a tape-shaped high temperature superconducting (HTS) wire (10) is positioned and which can heat the superconducting wire (10) in order to indirectly measure, without a power supply, a critical current equal to or greater than the capacity of the power supply, for the superconducting wire; a temperature sensor (250) and a magnetic field sensor (240), which are provided in the temperature control stage (210); a cryogenic vacuum chamber (170) including therein the temperature control stage (210) and a cooling device (180); an external magnetic field generating coil (140) which is positioned around the cryogenic vacuum chamber (170) and is capable of applying an external magnetic field to the superconducting wire (10); a simulation unit which calculates a distribution of a critical current (Jc) area of a wire cross-section (15) of the superconducting wire (10) on the basis of output signals of the temperature sensor (250) and the magnetic field sensor (240); and a control unit (270) for comparing whether the calculated current (I'c), which is capable of being conducted and is calculated by integrating the distribution of the critical current (Jc) area, matches an actual conduction current (I), and outputting the matched current value as the critical current (Jc), wherein the conduction current (I) is a current generated from the difference between an external magnetic field and a screening current-induced field (SCIF) of the superconducting wire (10).

The invention relates to a table-top device (106) for an induction device (100), wherein the table-top device (106) has a support surface (112) for placing a cooking vessel (110) on the table-top device (106), at least one induction coil (200, 202) which is designed to generate an output-side magnetic field, using an input-side magnetic field of an induction field of the induction device (100), in order to heat the support surface (112), and a sensor device (114) having at least one force sensor for detecting a pressure acting on the table-top device (106), the sensor device (114) being designed to provide a pressure signal which represents the pressure.

The present invention relates to a transponder (12) for determining a passing time upon passing an RFID loop antenna (18), comprising: three inductive coils (26) for measuring three field strength values of an activation signal transmitted by the RFID loop antenna upon passing the RFID loop antenna; a processing unit (28) for determining an effective value of the three field strength values indicating an inductive field strength based on the three field strength values; an accumulation unit (30) for collecting effective values for multiple activation signals over time and determining a time series of effective values; and a symmetry unit (32) for determining a transponder passing time corresponding to a point in time (P) within the time series at which effective values before and after the point in time have a maximum level of symmetry. The present invention further relates to a method and a system (14) for determining a passing time of a transponder (12).

A packed bed photochemical reactor ensures consistent and effective irradiation of light to a reactant volume passing through the reactor. The reactor arranges miniaturized lighting elements, such as LEDs, in a packed bed arrangement with predetermined gaps or passages between the miniaturized lighting elements. Fluid in communication with the packed bed flows between these gaps, ensuring a minimum distance to the irradiation source defined by the LEDs. Each LED is wirelessly powered by an induction field in the reactor through an adjacent coil or power source. The inductive field powers each of the lighting elements in a wirelessly powered manner to ensure that a reactant in the flowing fluid stream receives a consistent amount of irradiation energy at a wavelength specified by the LED. In this manner, based on the flow through the reactor, it can be ensured that large volume reactants obtain beneficial treatment rates.

According to the invention, the device (4) for continuously magnetically detecting at least one defect in a moving metal reinforcing element (1) comprises a first and a second magnetisation coil (5, 6) and a detection coil (7) that jointly delimit an inner passage (9) of longitudinal axis (X-X1). The first magnetisation coil (5) is configured to generate a continuous first magnetic induction field oriented towards the detection coil (7), the second magnetisation coil (6) being configured to generate a continuous second magnetic induction field oriented towards the detection coil (7). The detection coil (7) is configured to detect a magnetic-flux variation generated by the occurrence of a defect in the metal reinforcing element (1) moving longitudinally through the inner passage (9), the defect in the metal reinforcing element being detected based on the magnetic-flux variation.

The invention belongs to the technical field of wireless communication, and particularly relates to a magnetoelectric antenna low-frequency emission performance test method and system, and the method comprises the steps: obtaining the magnetic field intensity of a plurality of distance points in a deep near field environment of an electromagnetic shielding room, and calculating a spatial attenuation gradient through a logarithmic difference method; constructing a nonlinear weighting factor based on the deviation between the gradient and a theoretical attenuation rate, stripping an invalid induction field from the mixed field by combining an induction field offset item based on a distance quadratic ratio, and obtaining equivalent radiation source intensity only containing a radiation item; and finally deducing the far-field effective magnetic field intensity and radiation efficiency by using an inverse proportion model. According to the method, the problem of virtual high evaluation caused by physical space limitation and induction field interference of low-frequency antenna testing is solved, and the prediction accuracy of the remote communication capability in the limited space is improved.

A rotating electric machine (40) includes a stator (50) having a stator coil (52) and a rotor (60) having a rotor core (61) and a field coil (70). The rotating electric machine is configured to have harmonic current flowing through the stator coil to induce field current in the field coil. The rotor further has a circuit module (102) provided around a rotating shaft (32) and connected with the field coil to form a resonant circuit together with the field coil, and a coil end cover (103, 104) covering a coil end part (CE) of the field coil which is located axially outside the rotor core. Moreover, the coil end cover is a balance adjustment member that adjusts weight balance of the rotor in the circumferential direction; and at least part of the coil end cover in the circumferential direction constitutes an adjustment portion where weight of the coil end cover has been reduced or increased.

The invention relates to a transponder (12) for determining the elapsed time when passing through an RFID loop antenna (18), comprising: three induction coils (26) for measuring three field intensity values of an activation signal transmitted by the RFID loop antenna when passing through the RFID loop antenna; a processing unit (28) for determining an effective value of the three field intensity values based on the three field intensity values, the effective value of the three field intensity values being indicative of the inductive field intensity; an accumulation unit (30) for collecting the effective values of the plurality of activation signals over time and determining a time sequence of the effective values; and a symmetry unit (32) for determining a transponder elapsed time corresponding to a point in time (P) within the time sequence, the effective value before and after which point in time has a maximum level of symmetry. The invention further relates to a method and a system (14) for determining an elapsed time of a transponder (12).