28 results about "Electric potential" patented technology

The utility model relates to electric potential measurement technical field especially is a kind of Zeta electric potential measuring device, including carousel, the upper clamping mechanism is fixed with the lower end of carousel, the lower clamping mechanism is correspondingly arranged in the lower end of upper clamping mechanism, and the upper clamping mechanism and the lower clamping mechanism are connected by thread sleeve, and the installation hole of upper clamping mechanism and lower clamping mechanism is placed to the sample to be measured. By rotating thread sleeve, since the thread direction of thread side ring is opposite, the upper clamping mechanism and the lower clamping mechanism will move oppositely. At this time, extrusion plate will pass through the triangular block of extrusion limiting mechanism in the moving process, so as to drive metal sheet deflection extrusion to sample and apply uniform pressure, firmly clamp sample between upper and lower clamping mechanism, and it is convenient to operate for different size samples.

This invention discloses a phase-field method for multi-topological domain cyclic transformation in lead titanate (PTO) ferroelectric thin films. A computational model of the PTO ferroelectric thin film is established, defining polarization, potential, displacement, and oxygen vacancy concentration as field variables. Based on Ginzburg-Landau theory, a total free energy expression for the PTO ferroelectric thin film is established, incorporating oxygen vacancy transport processes and the coupling between oxygen vacancies and the electrostatic field. Combining time-correlated Ginzburg-Landau kinetic equations, mechanical equilibrium equations, electrostatic equilibrium equations, and Nernst-Planck equations, a phase-field model of the PTO ferroelectric thin film coupled with multiple physics fields is established. A stable initial skyrmion domain structure is constructed, and a preset uniform electric field sequence is applied to simulate the cyclic transformation process between skyrmions and flux-closed domains and / or stripe domains. This method can analyze the evolution path, transformation threshold, oxygen vacancy distribution, and cyclic stability of topological domains in PTO ferroelectric thin films under the synergistic effect of an applied electric field and oxygen vacancies, providing a theoretical basis for the design of ferroelectric topological domain multi-state storage devices.

An electro-absorption modulator 100 including a quantum well 102 configured to provide a variable electromagnetic absorption spectrum in response to an applied electric field, wherein the quantum well is a type-II quantum well comprising two material layers, each material layer having a graded material composition, such that the potential in each material layer varies as a function of position.

Apparatus for use in determining an electrical admittivity of a subject of interest has a first electrode and a second electrode configured to apply electric excitation to the subject of interest and one or more electric potential sensors provided about the subject of interest, each sensor configured to simultaneously measure an electric potential at a surface of the subject of interest and / or one or more magnetic field sensors configured to simultaneously measure a magnetic field close to a surface of the subject of interest. A controller o simultaneously monitors current or voltage at the electrodes and the sensors to determine an electrical admittivity of the subject.

The application discloses a high-precision hexagonal spiral silicon drift detector and relates to the technical field of semiconductor detection. The application obtains a second-order approximate formula of radius by combining a first-order approximate formula of radius to calculate point coordinates, so that the last number of turns is more accurately obtained to obtain the structure, and therefore, the potential electric field distribution is closer to the design requirement. The actual number of turns is more accurate on the basis of the first-order approximation, and the problem of the accuracy calculation of the number of turns of the spiral ring of the spiral silicon drift detector in the prior art, i.e., the problem of the accurate calculation of the radius of the spiral ring, is solved.

The application provides a rod-shaped multilayer structure electric field quantitative analysis method and system based on layer potential technology, and relates to the technical field of object detection. A multilayer structure geometric model is established, including an internal rod-shaped content, a middle layer region and an outer layer region; an electric potential control equation and a boundary transmission condition of the multilayer structure under a background electric field are constructed, an electric field boundary value problem is converted into an integral equation system on the multilayer boundary based on layer potential theory; layer potential operators in the integral equation system are subjected to asymptotic analysis, and a quantitative expression of a perturbation electric field is derived; according to the quantitative expression, geometric parameters and position information of the internal rod-shaped content are uniquely determined through one-time boundary electric field measurement data. Therefore, the perturbation electric field of the rod-shaped three-layer structure is accurately described, and a uniqueness theory that uniquely reverses and restores the rod-shaped content only by one-time boundary measurement is established.

The application provides a method, device, equipment, medium and program product for predicting the magnetic field response of a neighboring well. The method comprises: obtaining well site working condition data; determining the shape factor of an end-insulated finite-length electrode according to the well site working condition data; establishing an excitation model of the end-insulated finite-length electrode according to the well site working condition data; modulating the excitation model according to the shape factor to obtain a drilling fluid modal source coefficient of a drilling well; establishing a four-layer layered response model of a target well according to the well site working condition data; calculating the background potential and the background electric field of the drilling well according to the drilling fluid modal source coefficient; and predicting the magnetic field response of the four-layer layered response model of the target well according to the background potential and the background electric field to obtain the active magnetic field intensity and the radial electric field profile of the target well. The accuracy of predicting the magnetic field response of a neighboring well is improved.

The application discloses a method for improving simulation speed of physical quantity of cross-field diode, relates to simulation technology of vacuum electronic device, and is proposed in view of the long simulation time in the prior art. Before solving the electric field force corresponding to each electron particle, the numbering is sorted in sequence from the cathode to the anode according to the positions of all the electron particles at the current time, the numbering is corresponding to the positions of the electron particles, and then the electric field force corresponding to each electron particle is solved according to the partial solution of the diode potential. The method has the advantages that the solving step of the electric field force corresponding to the partial solution of the diode potential in the cross-field diode is improved, the fast sorting algorithm is combined, the simulation speed is greatly improved compared with the general meshless numerical algorithm, and the method is suitable for the vacuum space of the cross-field diode in which the electron particles are injected from the cathode to the space with an arbitrary initial speed and an arbitrary magnetic field value.

The application provides a regional cathode protection power supply test system and a test method, and relates to the technical field of corrosion control of oil and gas field stations. The regional cathode protection power supply test system is used for performing a power supply test on a test region for regional cathode protection. A temporary ground bed is arranged on the ground of the test region. A power supply equipment is arranged between the temporary ground bed and a metal pipeline of the test region to form a power supply loop. The power supply test system comprises a control host and a test tool for testing an electric potential. The test tool is arranged at a test point in the test region. The control host is in communication with the test tool and the power supply equipment. The control host is used for controlling the on-off of the power supply equipment, one-key control of the test tool for collecting the electric potential (including a natural electric potential, a power-on electric potential and a power-off electric potential) of the corresponding test point, and real-time acquisition of the collected electric potential. The application is used for quickly and accurately determining the power supply test of the cathode protection current.

In a photoelectric conversion device, the potential control unit controls electric potentials applied to the meta-surface. The meta-surface includes a plurality of patterns which are space away from each other. The plurality of patterns include an antenna portion and at least one bias portion. The antenna portion extends in a predetermined direction and emits the electron in response to incidence of the electromagnetic wave. The potential control unit switches a first state and a second state by controlling the electric potentials applied to the plurality of patterns. In the first state, a component of an electric field from the bias portion toward the antenna portion in a predetermined direction is positive. In the second state, a component of an electric field from the bias portion toward the antenna portion in the predetermined direction is negative.

The application discloses a 4D-STEM DPC electric field direction calibration method, and relates to the technical field of electron microscopy. The method comprises the following steps: obtaining original 4D-STEM data, generating an ADF image and calculating an electric field vector field; extracting a set of atomic column center positions from the ADF image; constructing a candidate set of discrete coordinate transformations, selecting an optimal flip transformation based on the radial consistency of the electric field near the atoms; performing a coarse-to-fine search on the rotation angle through a target function to determine an optimal rotation angle; eliminating the 180-degree direction ambiguity by calculating the sign of the weighted charge density indicator in the atomic neighborhood; and calibrating the original centroid shift field by applying the optimal flip transformation and the final rotation angle, and outputting the calibrated electric field, charge density and potential distribution. The application can automatically identify and correct the coordinate axis flip and mirror transformation, eliminate the 180-degree direction ambiguity, output the unique and correct electric field direction, and be suitable for the general 4D-STEM DPC analysis process.

The application discloses a resistance testing method, and relates to the technical field of intelligent testing, and comprises the following steps: step S100, testing any resistance model of resistance, independently analyzing the testing result, and obtaining self characteristics; step S200, performing positive testing and reverse testing on the resistance to be tested according to the testing method, and obtaining positive result and reverse result; and step S300, dividing the grade of the resistance to be tested according to the positive result, the reverse result and the self characteristics. Through screening of effective historical data, the application improves the scientificity of subsequent analysis and the rationality of testing parameters, avoids irreversible damage to the resistance, improves the economy of testing, eliminates one-way system errors such as contact resistance, lead resistance and thermoelectric potential through mean value taking of positive and reverse testing and difference value analysis.

A method for removing outliers of three-dimensional high-density electrical data, comprising: arranging high-density original data in columns, respectively, coordinates of electrodes A, B, M and N, natural electric potential SP, voltage VP, current IP and resistivity RO; calculating electrode AB distance AB, electrode AB midpoint distance XAB, electrode MN distance MN, electrode MN midpoint distance XMN, normalized electric potential LOGUI and normalized electric potential and distance ratio LOGUIMNAB according to the high-density original data; establishing a mapping relationship between the spatial positions of data points and each measurement value according to the calculated values of electrode AB distance AB, electrode AB midpoint distance XAB, electrode MN distance MN, electrode MN midpoint distance XMN, normalized electric potential LOGUI and normalized electric potential and distance ratio LOGUIMNAB, and drawing scatter plots of different dimensions; removing outlier data in the scatter plots according to the drawn scatter plots of different dimensions, and saving the data after removing outliers. The present application considers the spatial relationship of each data point and the physical relationship of each measurement value, and has the advantages of high efficiency and high precision.

The invention relates to a device (100) for determining a physiological or psychic state of a mammal, the device (100) comprising at least one earpiece comprising: - a main body (102) comprising a rotary body (110) having an axis of rotation (108); and - an end piece (104) configured to be inserted into an ear canal, said end piece (104) having a cylindrical channel (112) intended to receive a rotary body (110) for detachably mounting the end piece (104) on the main body (102), the end piece (104) being arranged so as to rotationally move about the axis of rotation (108) in order to allow at least one electrode (106) to be oriented towards a zone of the brain of the mammal, and said end piece (104) comprising a plurality of electrodes (106) arranged on an outer surface of the end piece (104), each electrode (106) being configured to capture an electric signal in the ear canal of the mammal.

The present invention provides a potential corrector unit for use in a charged particle beam assessment apparatus (41) for assessing a sample (208). The potential corrector unit comprises a potential corrector (300) configured to influence an electric potential at a peripheral region of a surface of the sample. The potential corrector is disposed upbeam of the sample.

This invention provides a method for inverting the charge quantity of abnormal charged particles in the gas path of a gas turbine, applicable to the field of early fault diagnosis in gas turbines. The method includes: determining a parameter set; constructing a forward model function based on the parameter set to map the mapping relationship between point charges within a closed conductive cavity and the potential at any point on the inner wall; constructing an objective function based on the potential measurement vector output by an electrostatic sensor and the forward model function; iteratively solving the objective function using a nonlinear optimization algorithm, and finding the optimal parameter vector that best matches the measured value with the theoretical value by minimizing the objective function; and substituting the optimal parameter vector into the forward model function to obtain the charge quantity. This invention achieves quantitative monitoring and location of charged particles in the gas path of a gas turbine, and has advantages such as high inversion accuracy, strong anti-interference ability, and suitability for online real-time fault early warning.

This invention relates to the field of insulator optimization technology, specifically providing an insulator optimization method based on dielectric constant gradient modulation of the spatial electric field. The method includes: establishing a geometric model of the GIS equipment's cavity, central conductor, grounding tank, and insulator working together in a two-dimensional axisymmetric coordinate system; constructing a gradient power function of the dielectric constant varying radially based on the insulator's geometric and material parameters; defining the electric field calculation region; solving the electric field equations using this function and preset boundary conditions to obtain potential and electric field intensity distribution data; optimizing the dielectric constant gradient parameters with electric field coverage and average tangential field strength as dual optimization objectives and maximum field strength along the surface as a constraint, thus completing the insulator optimization. This invention provides an insulator optimization method based on dielectric constant gradient modulation of the spatial electric field, which solves the problem that insulator optimization methods fail to actively modulate the spatial electric field, making it difficult to fundamentally eliminate insulation faults caused by metal particles.

According to the present disclosure, there is provided a technique capable of performing a substrate processing more uniformly. According to one aspect thereof, there is provided an electrode structure capable of generating a plasma, including: a first electrode group constituted by: at least one first electrode to which an electric potential is applied; at least one second electrode whose length is different from that of the first electrode and to which an electric potential is applied; and at least one third electrode to which a reference potential is applied; and a second electrode group constituted by: at least one fourth electrode to which an electric potential is applied; at least one fifth electrode whose length is different from that of the fourth electrode and to which an electric potential is applied; and at least one sixth electrode to which the reference potential is applied.

This invention discloses a hybrid prediction method for the lightning strike probability of offshore wind turbines: 1. Constructing a parameterized static potential and electric field background library; 2. Setting up an n-level virtual envelope surface, with a sparse electrode grid on the outermost layer to solve the electrostatic field and construct the background library, obtaining the virtual attachment points of the next-level envelope surface as new electrodes, and repeating the solution and path prediction step by step; 3. Starting from the nth-level electrode grid point, using a path search with decreasing potential constraints and end-point field strength rewards, obtaining the attachment points of the next-level virtual surface in the region formed by the virtual envelope surface, and recording the path points between the start and end points as the leading development path; 4. Weighted fusion of multiple simulation results from each starting point of the multi-electrode grid to form a lightning strike probability distribution cloud map. This invention also discloses a hybrid prediction system for the lightning strike probability of offshore wind turbines. The hybrid prediction method for the lightning strike probability of offshore wind turbines in this invention solves the problems of excessive computation and long time consumption of fractal methods, achieving a balance between high accuracy and high efficiency.

A combined column of a scanning electron microscope located in a device (1) with at least one beam of charged particles with at least one column (2) containing a source (7) of charged particles producing the charged particles, elements for shaping and directing the charged particles, an objective (13) at a potential forming an objective lens (15) formed by a magnetic field emanating onto the sample, and further a potential tube (18) at a potential different from the potential of the objective (13) positioned along the optical axis of the column (2), wherein the upper end of the potential tube (18) is located behind the source (7) of charged particles in the direction of the current of charged particles, and the lower end of the potential tube (18) is located in the column (2) behind the source (7) of charged particles in the direction of the current of charged particles and simultaneously in front of the objective lens (15) in the direction of the current of charged particles, wherein a deceleration electrostatic field generated as a result of the difference in electric potential between the potential tube (18) and the objective (13) is located between the lower end of the potential tube (18) and the objective lens (15).

There are provided an artificial object control method and an artificial object control apparatus. The artificial object control method is a control method of controlling an artificial object near any of planets including the earth or near a satellite in outer space. The control method includes: accelerating and ejecting electrons to increase a potential of the artificial object as compared with a state where no electron is emitted; promoting capture of electrons present near the artificial object as compared with the state where no electron is emitted; accelerating and ejecting the captured electrons; and changing momentum or / and angular momentum of the artificial object by reaction caused in response to momentum applied to the accelerated and ejected electrons.

The present invention provides a discharge damage mitigation unit for use in a charged particle beam assessment apparatus for projecting a beam of charged particles towards a sample. The discharge damage mitigation unit is configured for use in a high electric field environment. The discharge damage mitigation unit comprises one or more extension elements configured to receive a discharge from a high voltageelement at a different electrical potential in the high electric field environment. Each extension element is arranged outside of a beam path region encompassing a beam path of the beam of charged particles. Each extension element is supported on a component of the charged particle beam assessment apparatus, wherein a distal region of the extension element is configured to protrude from a surface of the component.

The application discloses a space target direction identification algorithm based on an array type electrostatic detector and belongs to the technical field of space target detection. The application detects space potential by deploying an electrostatic detector electrode array on the surface of a spacecraft, obtains local electric field distribution through a space interpolation method, obtains an equipotential line by connecting a point with the same potential as the potential of a center point of the electrode array region, solves the equation of an equipotential circle where the center point is located according to the coordinates of each point on the equipotential line, determines the direction of the charge center of a target charged body, and realizes non-contact detection of space targets such as micro space debris in the environment of the spacecraft.

The application discloses a vacuum surface flashover simulation method based on a non-uniform triangular mesh and a related device, and belongs to the field of finite element simulation. The method comprises the following steps: constructing and initializing an electric field simulation domain, and dividing a non-uniform triangular mesh which is dense near a dielectric surface and sparse far from the dielectric surface; injecting seed electrons at a cathode three-combination position and updating particle positions; simulating an electron collision process by using a Monte Carlo method, and determining the number and speed of various particles; distributing the particles to the triangular mesh, calculating a weight coefficient and a charge density, and updating a potential and an electric field intensity; and iterating the above steps until a simulation condition is met. The method breaks through the limitation of a traditional rectangular mesh, can be adapted to complex boundaries such as grooves and roughening, can comprehensively simulate all stages of flashover such as field emission, secondary electron emission, gas desorption and ionization, can reduce numerical errors and improve simulation reliability, can provide theoretical guidance for new insulation design and protection, and can make up for the limitation of the prior art which only focuses on the initial stage of flashover.

The application discloses a gilding conductive layer bending electrical failure prediction method, and belongs to the technical field of flexible electronic reliability simulation and gilding process. The method comprises the following steps: grid modeling, spatial discretization of the gilding conductive layer on the flexible substrate on a D2Q9 discrete velocity lattice; electric conduction lattice Boltzmann solving, iterative solving of the electric potential field distribution through a collision-migration evolution equation; damage evolution, updating of damage variables of each grid point based on the bending mechanics of laminated plates and the cumulative damage criterion; crack dynamic introduction, changing the grid point reaching the critical damage into an insulating boundary and applying a rebound boundary condition; resistance extraction and life prediction, extracting the equivalent resistance between two electrodes, and when the equivalent resistance exceeds the failure threshold, the corresponding bending cycle number is the bending fatigue life. The application can quantitatively evaluate the bending reliability of the gilding conductive layer in the design stage without additional experiments.