60 results about "Electromagnetic field coupling" patented technology

The invention discloses an embankment hidden danger detection and early warning method and system based on electric field and electromagnetic field coupling, and the method comprises the following steps: obtaining and processing the resistivity and dielectric constant of an embankment dam body, constructing a joint inversion objective function based on a processing result, and carrying out the detection and early warning of the embankment hidden danger. A joint inversion model is established, a minimum joint inversion objective function is used for solving, a multi-physics field joint inversion result is obtained and used for delineating an abnormal area, a time-shifting resistivity monitoring network is arranged in the area for detection, the seepage velocity is obtained, soil mass mechanical parameters are defined, and the seepage velocity is calculated. And constructing an embankment hidden danger numerical model, using seepage velocities as boundary condition input, simulating embankment dam body stability safety coefficients under different seepage velocities, setting an early warning threshold value, and giving an alarm when the embankment dam body stability safety coefficients reach the early warning threshold value. Through coupling analysis of the earth electric field, the seepage velocity and the like, data multiplicity is effectively eliminated, the defect resolution is remarkably improved, and the misjudgment risk is greatly reduced.

The invention relates to the technical field of power cables, and discloses a parallel power cable current sharing optimization method and device based on a magnetic ring current equalizer, and the method comprises the steps: carrying out the simulation of a three-dimensional finite element model, and determining first simulation impedance; obtaining an equivalent circuit model, determining theoretical impedance according to the equivalent circuit model, and determining current impedance according to the theoretical impedance and the first simulation impedance; obtaining an electromagnetic field coupling model, determining a magnetic ring compensation parameter, and simulating the electromagnetic field coupling model according to the magnetic ring compensation parameter and the current impedance to determine an impedance compensation mapping relation; and determining an impedance compensation sensitivity matrix according to the impedance compensation mapping relation, and setting values of magnetic ring compensation parameters so as to perform current sharing optimization on the parallel power cables. According to the invention, the mapping relation between the magnetic ring compensation parameter and impedance compensation of the magnetic ring current equalizer can be quantified, thereby accurately generating an optimal compensation scheme, greatly improving the reliability of the parallel power cable, and facilitating the realization of power transmission safety.

The invention relates to the field of wireless charging, and discloses a portable wireless charging electronic system and method, and the method comprises the steps: obtaining the electric quantity of a battery and the inclination or movement state data of equipment through an input system of the wireless charging equipment, and carrying out the analysis through combining with an electromagnetic field intensity algorithm, and constructing a battery charging environment data set of the equipment; performing dynamic feature extraction on the battery charging environment data set, and constructing an equipment charging state model based on a real-time electromagnetic field simulation algorithm; whether the charging process is stable or not is judged based on the charging efficiency change condition, if yes, the periodic change result of the charging efficiency is recorded, dynamic adjustment is conducted in combination with equipment position information, and the electromagnetic field coupling effect is optimized; according to the adjusted electromagnetic field coupling effect, applying a multi-dimensional real-time feedback algorithm to carry out environmental adaptability correction on the charging efficiency; and on the basis of the optimized charging strategy, the charging process is monitored in real time in combination with an equipment state detection system. The method has the advantage of improving the charging efficiency.

The invention provides a partial discharge detection system based on a Rydberg atom quantum coherence effect, and the system comprises an optical excitation module which is used for transmitting two-photon laser to excite hot atoms to enter a Rydberg state; the atomic gas chamber is used for accommodating hot atoms and is coupled with an electromagnetic field generated by the partial discharge signal, so that the hot atoms generate energy level response change under the action of the electromagnetic field; the detection light path module is used for detecting a change signal of light signal intensity in the atomic gas chamber and converting the change signal into an electromagnetic response characteristic of an electromagnetic field; the signal acquisition and processing module is used for receiving the electromagnetic response characteristics, demodulating and analyzing the electromagnetic response characteristics and extracting characteristic parameters of the partial discharge signals; and the control and calibration module is used for receiving the characteristic parameters of the partial discharge signal, performing calibration based on an energy level frequency shift rule of Rydberg atoms, and outputting electric field intensity subjected to quantization calibration. The system can realize high-sensitivity, anti-interference and traceable detection of weak partial discharge signals.

The invention provides a paper-based SERS (Surface Enhanced Raman Scattering) substrate based on ultrahigh-activity silver nanowires as well as a preparation method and application of the paper-based SERS substrate, and belongs to the technical field of surface enhanced Raman spectrum detection. Silver nanowires which are arranged in order are fixed on the surface of hydrophobic filter paper to regulate and control gaps of the silver nanowires so as to enhance the local electromagnetic field coupling effect, target molecules are induced to be enriched in situ by utilizing the hydrophobic characteristic of the hydrophobic filter paper, and a high-density Au / Ag heterogeneous interface is constructed on the surface of the etched silver nanowires in combination with aqua regia etching and AuNPs self-assembly technologies. The SERS signal intensity is further improved through the synergistic effect of bimetallic plasma resonance, the repeatability of the substrate is improved through neat arrangement of the silver nanowires, the stability is improved by wrapping the silver nanowires with the gold nanoparticles, the detection sensitivity of the paper-based SERS substrate is further improved, and the paper-based SERS substrate is low in preparation raw material price, can be manufactured in a large scale and is suitable for industrial production. The trace substances are very convenient to detect and can be taken at any time when being used.

Provided is a power distributor / combiner 1 that outputs an input microwave power after distributed or combined; the power distributor / combiner 1 including: a main body 10 that defines a radial waveguide 101 as a substantially cylindrical cavity; a center terminal 11 as an electromagnetic field coupling terminal, arranged in the radial waveguide 101 of the main body 10 while aligned with the center axis C of the radial waveguide 101; and a plurality of peripheral terminals 12 as electromagnetic field coupling terminals, arranged in the radial waveguide 101 radially away from the center terminal 11, and the radial waveguide 101 having a radius R smaller than a quotient of a free-space wavelength at a frequency of the microwave power, divided by 2.619.

This invention discloses a method and system for detecting partial discharge in the main transformer of a new energy power plant step-up substation, belonging to the field of power equipment testing technology. The method includes: establishing an electromagnetic field coupling model of the main transformer's operating conditions; acquiring real-time operating condition data, characteristic gas concentration signals, and multi-mode detection signals of the main transformer in the step-up substation; constructing a multi-mode signal feature vector; determining the first probability of partial discharge in the main transformer; determining the second probability of partial discharge in the main transformer; performing deep partial discharge diagnosis under operating condition fluctuation-sensitive fusion; and obtaining the diagnostic results of the main transformer's partial discharge. This invention solves the technical problems of existing technologies where the detection of partial discharge in the main transformer of a new energy power plant step-up substation is easily affected by operating condition fluctuations and has a single detection dimension, resulting in insufficient accuracy and stability of diagnostic results. It achieves accurate detection and multi-dimensional diagnosis of partial discharge in the main transformer of a new energy power plant step-up substation, improving the accuracy and stability of partial discharge detection.

The utility model discloses a microstrip patch antenna which comprises a dielectric substrate and a radiation patch. The radiation patch is arranged on the dielectric substrate, the radiation patch is E-shaped, the parallel edge of the E-shaped radiation patch is defined as a first sub-radiation patch, the vertical edge of the E-shaped radiation patch is defined as a second sub-radiation patch, and the length of the first sub-radiation patch is larger than or equal to 2.1 mm and smaller than or equal to 2.5 mm. The E-shaped structure enables the current to bypass between the first sub radiation patch and the second sub radiation patch, which is equivalent to increasing the electrical length of the radiation patch and reducing the resonant frequency of a fundamental mode, so that the low-frequency band bandwidth is broadened; the edges of the first sub-radiation patch and the second sub-radiation patch can generate strong electromagnetic field coupling to excite an additional parasitic resonance mode, so that the frequency band is further widened, and the bandwidth of the microstrip patch antenna is effectively widened. Wherein the first sub radiation patch of 2.1 mm to 2.5 mm enables the resonant frequency of the microstrip patch antenna to range from 43.7 Ghz to 55.1 Ghz, the relative bandwidth is 23%, and high bandwidth is achieved.

The application discloses a variable magnetic flux type magnetic coupler capable of realizing air cooling and liquid cooling heat dissipation, comprising a driving unit, a driven unit and a cooling liquid injection unit; the driving unit is connected with a power input end, the driven unit is connected with a power output end, the driving unit and the driven unit are respectively provided with corresponding conductors and permanent magnets, electromagnetic field coupling transmission is realized by using the conductors and the permanent magnets, and the adjustment of the magnetic flux is realized by adjusting the position of the permanent magnet; the cooling liquid injection unit comprises a cam transmission mechanism, a plunger pump and an injection mechanism; the cam transmission mechanism is connected with the power input end and moves synchronously with the power input end; the cam transmission mechanism is movably connected with plungers of the plunger pump, and the rotation is converted into the linear motion of the plungers by the cam transmission mechanism; the plunger pump is connected with the injection mechanism through a pipeline, and the cooling liquid is injected to the driving unit and the driven unit by the injection mechanism to cool the driving unit and the driven unit.

A wireless power transfer apparatus for providing wireless power; it has an array of resonators; a powered resonator for providing power through electromagnetic resonance to said array of resonators; wherein said resonators transfer power from said powered resonator to any one of said array of resonators for delivering wireless power to said device by a modified connection between said array of resonators except the powered resonator; and / or wireless weak electromagnetic field coupling between neighboring resonators of said array of resonators each having a tuning frequency of resonance wherein said array of resonators has at least two distinct tuning frequencies from all the resonators constituting said array of resonators; wherein said modified connection is one of or a combination of: a wired connection; and a strong electromagnetic field coupling.

An antenna device includes first and second radiating elements, a first coil coupled to the first radiating element or a feeding circuit, a second coil coupled to the second radiating element and coupled to the first coil via an electromagnetic field, and an inductor. The first and second radiating elements are coupled to each other via an electric field. The harmonic resonant frequency of a resonance circuit defined by a transformer defined by the first coil and the second coil, the inductor, and the second radiating element exists within a communication frequency range. The harmonic resonant frequency is a (2n+1)th harmonic frequency, where n is an integer equal to or greater than 1.

This application discloses a solid-state microwave source output power testing device, relating to the field of electrical variable testing. The device includes a power supply module, a mechanical adjustment component, and a light-emitting indicator component. The power supply module supplies power to the solid-state microwave source; the mechanical adjustment component adjusts the output power of the solid-state microwave source; and the light-emitting indicator component detects the output power of the solid-state microwave source. This application uses a mechanical method to adjust the output power of the solid-state microwave source and employs electromagnetic field coupling + light emission to detect the output power. This enables intuitive qualitative detection of the solid-state microwave source output power, has a simple structure and low cost, and the mechanical adjustment component and the light-emitting indicator component have low requirements for the testing environment.

The application discloses a kind of three-frequency co-aperture multi-beam antenna design method, device and system, and the forbidden area of three-frequency band radiator and lamination constraint are extracted by electromagnetic field coupling simulation, and initial layout condition is established;Subsequently, space topology optimization is carried out to determine the radiator layout and feed network structure, then polarization direction and excitation phase are jointly optimized to realize frequency band matching, finally, beamforming parameters are generated by multi-objective optimization, and finally, a three-dimensional model of co-aperture integration is constructed, so as to realize the collaborative design and optimization of three-frequency band antenna in limited space.The application can realize the collaborative improvement of multi-band high isolation, low coupling interference and multi-beam dynamic shaping capability.

To provide a contactless data transmitter / receiver that can have a low-profile.SOLUTION: An RFID tag 10 comprises a substrate 1 having an IC chip 11 and a first antenna 12 formed on a first main surface 1a, a second antenna 2 having an electromagnetic field coupling part 21 that is electromagnetically coupled to the first antenna 12, and a plate-shaped support 3 for supporting the substrate 1 and the second antenna 2. A holding part 43 for holding the substrate 1 is formed on the support 3. A container recess part 37 for containing the electromagnetic field coupling part 21 is formed on a bottom surface 43a of the holding part 43. The electromagnetic field coupling part 21 contained in a container groove 34 faces the first antenna 12.SELECTED DRAWING: Figure 3

The application discloses a terahertz ultra-wideband single-pole single-throw high-speed switch, and relates to a waveguide transmission line technology. The scheme is proposed for the high insertion loss and other problems in the prior art. A coupling line module is arranged for coupling connection between a signal input end and a signal output end; a switch module is arranged for turning on or turning off the coupling line module; the coupling line module is provided with a folded coupling line structure and a folded pseudo virtual line structure; the folded coupling line structure is used for signal coupling transmission; the folded pseudo virtual line structure is symmetrically arranged with the folded coupling line structure and is used for assisting electromagnetic coupling to improve the working frequency of the switch. The pseudo virtual line technology introduced can additionally participate in electromagnetic field coupling and change pole distribution and frequency response of a circuit, so that the working frequency of the circuit is improved. In addition, the structure itself has the characteristics of low insertion loss, and a control transistor gate does not need to be additionally applied with a large bias resistor, so that the switching speed of the switch is significantly improved.

An antenna device includes a metal layer for forming an antenna element in a predetermined planar shape and a ground arranged on a lower side of the metal layer. The metal layer forms a first metal forming the planar shape, a notch portion formed at the first metal, and cutting out a part of an edge of the planar shape, a second metal being an electromagnetic field coupling element arranged with a predetermined distance spaced from the first metal inside the notch portion, and a feeder line formed outside the planar shape, and to be connected with the second metal via an opening portion of the notch portion. For the second metal, a width at the opening portion is smaller than a maximum width at a portion more inside the notch portion than the opening portion.

The application discloses a method, device, equipment, medium and product for predicting radio frequency heating of a medical implant in magnetic resonance, and relates to the field of medical instruments and equipment. The device comprises an electromagnetic field model, a phantom model, a plurality of to-be-tested medical implant models with different configuration parameters, and a host computer module. By simulating a magnetic resonance scanning environment, combining the physical characteristics of the phantom model and the to-be-tested medical implant, and coupling the electromagnetic field to the temperature field by using the host computer module and performing data processing, the temperature prediction of the radio frequency heating effect of the medical implant in the magnetic resonance examination is realized. The application considers that the implant is in different parts of the medium, and the temperature of the radio frequency heating effect of the medical implant in the magnetic resonance examination is predicted, so that the radio frequency heating safety evaluation can be performed in advance, potential safety risks can be effectively avoided, and the detection efficiency is improved.

This disclosure provides an antenna device and electronic device capable of miniaturization and achieving the desired radiation efficiency. The antenna device (100) of this disclosure includes: a substrate (20); and a first antenna and a second antenna formed on the substrate (20). A grounding region (20b) includes: a region (20b1) having a length (D2) in the Y direction orthogonal to the X direction; and a region (20b2) having a length (D3) longer than the length (D2). In the case where the substrate (20) is divided in the X direction by an electromagnetic field coupling element (10) into a first side (20c) for the formation of the first antenna element (41) and the second antenna element (42) and a second side (20d) opposite to the first side (20c), the region (20b2) is provided on the second side (20d) of the substrate (20), and a cable (40) connecting the power supply circuit (30) to the first antenna or the second antenna is fixed to the region (20b2).

The invention belongs to the technical field of ionosphere total electron content prediction, and particularly discloses an ionosphere total electron content prediction method based on physical parameter enhancement. The data set comprises ionosphere TEC observation data, space environment data and two-dimensional physical parameter data output by a thermal layer-ionosphere electrodynamic circulation model, and the thermal layer-ionosphere electrodynamic circulation model is based on a first principle; the evolution of a thermal layer and an ionized layer is calculated by adopting thermodynamics, momentum conservation, electromagnetic field coupling and plasma kinetic equations; the data set is preprocessed, so that the TEC observation data and the physical parameter data are matched on the spatial scale; inputting the preprocessed data set into a pre-established ConvLSTM deep learning model for training; and using the trained ConvLSTM model to predict the future ionosphere TEC distribution. According to the invention, the prediction precision of the ionized layer TEC in an extreme space weather state can be effectively improved.

Provided is a laminated electronic component capable of suppressing electromagnetic field coupling between a plurality of inductors and capable of being miniaturized. The laminated electronic component includes a laminate and first to third inductors. An area of a region obtained by vertically projecting a first space including a first axis and surrounded by the first inductor to an XZ plane is larger than an area of a region obtained by vertically projecting a second space including a second axis and surrounded by the second inductor to a YZ plane. The third inductor is disposed such that a third axis does not cross the first space and crosses the second space.

The invention discloses a three-frequency common-caliber multi-beam antenna design method, device and system, and the method comprises the steps: extracting a distribution forbidding region and lamination constraint of a three-frequency-band radiator through electromagnetic field coupling simulation, and building an initial layout condition; the method comprises the following steps of: performing spatial topology optimization to determine a radiator layout and a feed network structure, jointly optimizing a polarization direction and an excitation phase to realize inter-band matching, generating a beam forming parameter through multi-objective optimization, and finally constructing a common-caliber integrated three-dimensional model, thereby realizing collaborative design and optimization of a three-band antenna in a limited space. According to the invention, collaborative improvement of multi-band high isolation, low coupling interference and multi-beam dynamic shaping capability can be realized.

The present application relates to the technical field of electronic harnesses, and specifically provides a method for processing anti-interference electronic harnesses, comprising: generating an impedance distribution curve through time domain waveform analysis, wherein the accuracy of the impedance distribution curve reaches the ohm level, identifying the reflection peak of the discontinuous point and the waveform baseline noise level, and determining the specific location of the impedance mutation; adjusting the connector size and via spacing in the bus structure according to the reflection peak of the discontinuous point in the impedance distribution curve, optimizing the path length for the signal propagation delay time, and reducing the attenuation rate of the reflected signal; constructing a virtual model of the bus structure using three-dimensional modeling software, importing the adjusted connector size and via spacing, setting the geometric parameter grid density to thousands of points per millimeter, and generating a digital twin; and using a frequency domain analysis method to calculate the input signal amplitude range and vibration mode frequency range of the optimized bus structure, and verifying whether the electromagnetic field coupling strength meets the matching requirements.

The present invention discloses a radio frequency plasma comprehensive testing device and method for an ion process system, and relates to the field of plasma testing technology. The device comprises a host and a coupling probe; the coupling probe is placed on the radio frequency transmission line of the ion process system, and is used to couple and sample radio frequency energy through capacitance or induction coupling according to the electromagnetic field coupling principle, obtain current and voltage signals through coupling, and is also used to sense and obtain real-time temperature data inside the probe; the host comprises a main body shell and a shielding frame arranged in the main body shell, and a data processing and analysis unit is provided inside the shielding frame, which is used to process the received voltage, current and temperature signals, calculate and generate radio frequency power supply power, radio frequency power supply spectrum, impedance of a matcher and a vacuum reaction chamber, and other ion process system parameter values, and at the same time output clutter capture in radio frequency transmission and radio frequency transmission harmonic test results, thereby realizing comprehensive testing of the ion process system.

The invention discloses a terahertz ultra-wideband single-pole single-throw high-speed switch, relates to a waveguide transmission line technology, and aims to solve the problems of high insertion loss and the like in the prior art. A coupling line module is arranged for coupling connection between the signal input end and the signal output end; the switch module is used for switching on or switching off the coupling line module; the coupling line module is provided with a folding coupling line structure and a folding pseudo virtual line structure; the folding coupling line structure is used for signal coupling transmission; and the folding pseudo virtual line structure and the folding coupling line structure are symmetrically arranged and are used for assisting electromagnetic coupling so as to improve the working frequency of the switch. The method has the advantages that the introduced pseudo virtual line technology can additionally participate in electromagnetic field coupling, pole distribution and frequency response of the circuit are changed, and therefore the working frequency of the circuit is improved. Besides, the structure has the characteristic of lower insertion loss, and a large bias resistor does not need to be additionally applied to the grid electrode of the control transistor, so that the switching speed of the switch is remarkably improved.

The invention belongs to the technical field of transcranial magnetic stimulation, and particularly provides a coupling control method and system of a multi-coil transcranial magnetic stimulation system.The method comprises the steps that a transient change formula of capacitor voltage and coil current in a coupling state is deduced based on the Kirchhoff's law, a circuit-electromagnetic field coupling model is established, and a current waveform accurate expression is given; capacitance values and accurate voltages in different modes are determined through the expression, and high synchronism of current waveforms is realized by combining capacitor switching and voltage regulation. According to the invention, the multi-coil current synchronism in a coupling state is improved, and effective stimulation and target switching of deep and shallow double targets are realized.

The present invention belongs to the technical field of photochemical sensors and relates to a tunable hydrogen sensor and its preparation process, which includes a hydrogen-sensitive metal film and a piezoelectric sheet; the hydrogen-sensitive metal film is a structural layer formed by multiple hydrogen-sensitive metal bodies in an array manner, the hydrogen-sensitive metal body is a nanoscale bowl-shaped structure, two of the hydrogen-sensitive metal films are pressed together with the bowl tops of the hydrogen-sensitive metal bodies facing each other, two of the hydrogen-sensitive metal films are respectively connected to one of the piezoelectric sheets, and the two piezoelectric sheets adjust the distance between the two hydrogen-sensitive metal films through deformation. The present invention can achieve precise control of the nanoscale distance between the hydrogen-sensitive metal films through the piezoelectric sheet, enhance the electromagnetic field coupling at low concentrations, amplify weak signals, and achieve highly sensitive detection of low-concentration hydrogen. At high concentrations, the coupling is weakened to avoid signal saturation, and it can meet the hydrogen detection requirements from as low as 100 ppm to high concentrations, and is suitable for various application scenarios such as fuel cells and industrial gas detection.

The present invention expands the maximum frequency of radio waves that can be transmitted or received. A laminate (101) comprises a first dielectric sheet, a planar antenna (20) that is provided to the first dielectric sheet, and a substrate (40) for supplying power for the antenna (20). The antenna (20) has a flat first conductor (25) in which a first slot (30) is formed. The first conductor (25) includes a first conductor pattern (21) and a second conductor pattern (22) that sandwich the first slot (30) in plan view. The substrate (40) has a flat second conductor (45) in which a second slot (48) is formed. The second conductor (45) includes a first conductor pad (41) and a second conductor pad (42) that sandwich the second slot (48) in plan view. The first conductor pad (41) overlaps a first region (23), which is a section of the first conductor pattern (21), in plan view in a manner allowing electromagnetic field coupling, and the second conductor pad (42) overlaps a second region (24), which is a section of the second conductor pattern (22), in plan view in a manner allowing electromagnetic field coupling.

A receiving device receives a signal through electromagnetic field coupling with another communication apparatus, and the receiving device includes a coupled conductor including two electrodes, a circuit element section that is disposed between the two electrodes and includes a high-pass filter and a resistor, and a receiving circuit, wherein a cut-off frequency of the high-pass filter is lower than a self-resonance frequency of the coupled conductor.

The application discloses a non-metallic electric energy metering box with one-code dual-purpose anti-theft electricity verification, which comprises a non-metallic box body, a one-code dual-purpose verification module, a passive external monitoring unit, a physical locking isolation unit and an active reverse verification unit. The box body is made of insulating composite material, and a distributed electromagnetic coupling array is pre-embedded in the wall. The unique identity code of the verification module is used as a legal authentication certificate of the equipment in the first mode, and is used as an anti-theft electricity situation awareness key after being transformed by an algorithm in the second mode. The passive external monitoring unit passively collects running state characteristics through non-contact electromagnetic field coupling in the independent domain outside the box body. The physical locking isolation unit triggers irreversible locking when the characteristics deviate from the threshold. The active reverse verification unit sends a time-varying sequence challenge from the metering end to the power consumption end after locking. The application solves the technical problem of anti-theft electricity of the non-metallic electric energy metering box.

The invention provides a wireless communication automatic gain control method, which comprises the following steps that: by controlling a part of amplifiers in a multi-stage analog amplifier to be closed, a signal enters a post-stage amplifier in an electromagnetic field coupling manner; the dynamic regulator determines and regulates the signal gain by calculating the gain value, regulates the gear and calculates the gain value after the gear is regulated when the regulated signal gain meets the preset gear adjustable range, configures the register value through the lookup table, and regulates the multi-stage analog amplifier through the register; in response to the situation that the adjusted signal gain does not meet the preset gear adjustable range, whether the current gear is the gear limit or not is judged, and according to the state of the partial amplifier, it is determined that the gear is adjusted, and the partial amplifier is controlled to act. By closing part of amplifiers and inputting signals in an electromagnetic field coupling manner, the gain range can be enlarged, so that the range of transmission distance is enlarged, extremely close-range communication is realized, and the performance requirement of the system is met.