14 results about "Homogeneous electric field" patented technology

The application discloses a DNA molecule manipulation chip based on electric field and bending micro-channel coupling driving, which comprises a glass substrate and a structure layer, the structure layer is arranged on the glass substrate, at least one group of micro-fluid systems are arranged in the structure layer, two ends of the micro-fluid system are respectively communicated with a liquid inlet hole and a liquid outlet hole, the liquid inlet hole and the liquid outlet hole are vertically arranged through the structure layer, electrodes are respectively inserted into the liquid inlet hole and the liquid outlet hole, and the electrodes are used for applying direct current voltage to generate a spatial non-uniform electric field; a control method applied to the chip comprises the following steps: chip pretreatment, application of driving electric field, DNA molecule acceleration and polarization, DNA molecule positive dielectrophoresis focusing and migration; the application realizes high-efficiency mechanical-free focusing of the DNA molecules, and greatly improves the precision of subsequent optical detection and separation.

The application discloses a motor anti-corona material corona resistance performance test device, system and method, relates to the high-voltage motor insulation technical field, and the test device comprises a plate electrode assembly and a blade electrode, the plate electrode assembly is used for bearing a sample to be tested, and a grounding electrode is fixed to the lower surface of the plate electrode assembly; the bottom of the blade electrode has a straight line blade with a length of 50 mm+ / -0.1 mm, the main body curvature radius of the blade cross-section profile is 0.22 mm+ / -0.008 mm, the straight line blade is formed by the intersection of two inclined sides, the blade included angle is 53.14 DEG, and the corner at the length direction end has a roundness with a diameter of 3 mm+ / -0.2 mm; during the test, a uniform and spacing-adjustable discharge gap is formed between the surface of the straight line blade and the surface of the sample to be tested on the upper surface of the plate electrode assembly. The application solves the problems that the existing test device cannot simulate a real non-uniform electric field and is difficult to produce standardized corona erosion, and realizes efficient and repeatable quantitative evaluation of the corona resistance performance of the anti-corona material.

The application discloses a liquid metal injection type annular micro-particle fractionation micro-fluidic device and method, relates to the technical field of micro-fluidics and biological particle separation, and comprises a micro-fluidic chip main body which is internally provided with a sample channel, positive and negative electrode channels which are arranged in the micro-fluidic chip main body and are parallelly distributed on the two sides of the sample channel respectively, a liquid metal electrode array which is composed of liquid metal filled and solidified in the electrode channels, and the liquid metal electrode array for generating a non-uniform electric field in the sample channel, wherein the electrode channels are in a meandering and returning structure, so that the liquid metal electrode array forms thick-wall side electrodes in the micro-fluidic chip main body; and the device realizes high-throughput, high-purity and low-damage label-free biological particle separation.

The application provides an oil bubble discharge experiment platform comprising an optical diagnosis system, realizes quantitative research on bubble discharge characteristics of transformer oil under different parameters, and can observe clear images in a bubble discharge process, and the experiment platform comprises: a power supply system for power supply, wherein the power supply system comprises a test transformer, a protection resistor and a fast protection module; an experiment cavity for containing transformer oil; an electrode system installed in the experiment cavity and used for constructing a uniform electric field oil gap or a non-uniform electric field oil gap; a bubble generating system used for adding bubbles to the oil gap; a partial discharge detection system used for collecting partial discharge signals and analysis; and an optical diagnosis system used for observing the bubble discharge process of the oil gap in the experiment cavity; wherein the partial discharge detection system is further connected with the fast protection module, and is used for outputting signals to the fast protection module when a discharge or breakdown event occurs, so that the power supply system is cut off by the fast protection module.

The application provides a spherical metal particle suppression structure, a GIS terminal and a GIS cable outlet system, and relates to the technical field of high-voltage electrical equipment. The spherical metal particle suppression structure is arranged in a metal shell (as a ground electrode) of a GIS terminal, and comprises a gradient electrode and a particle trap. The gradient electrode is sleeved on a conductive rod in the metal shell (both are coaxial with the GIS terminal), and the particle trap is arranged on the inner side wall of the metal shell and close to a power output end (connected to a high-voltage cable) of the GIS terminal. The outer diameter of the gradient electrode gradually decreases along the axial direction from a power input end (connected to a GIS device) to the power output end of the GIS terminal, and is coupled with the conductive rod and the ground electrode to form a directional non-uniform electric field, which can guide the spherical metal particles entering from the power input end to move to the power output end and fall into the particle trap to be captured. In this way, the spherical metal particles can be prevented from contacting the epoxy sheath of the power output end, and electric field distortion and discharge failure can be effectively avoided.

The application discloses a SPAD detector based on an epitaxial structure design and a preparation method thereof. 0.53 Ga 0.47 As / In 0.52 Al 0.48 As superlattice transition layer, i-In 0.53 Ga 0.47 As absorption layer, AlAsSb / InAlAs composite barrier layer, InAlAs band transition layer, InAlAs charge layer, InAlAs multiplication layer and InGaAs cap layer, after epitaxial structure growth is completed, a guard ring and an active area step diffusion region are formed through process design and semiconductor technology, and then a uniform electric field can be formed in the center of the SPAD through one-time diffusion; the application can promote efficient and low-loss transmission of electrons, effectively inhibit trap-assisted tunneling TAT and SRH recombination to generate dark counts, and the uniform electric field formed can inhibit edge breakdown; and the single-photon detector based on the above epitaxial structure has low dark counts and after-pulses at room temperature.

The present invention provides a thin film deposition apparatus comprising: a processing cavity for depositing thin films; a gas supply assembly provided on the top wall of the processing cavity for supplying process gas into the processing cavity; a heating tray provided below the gas supply assembly for supporting and heating the substrate; an upper electrode and a lower electrode for forming a uniform electric field within the processing cavity; and a radio frequency source connected to the upper electrode and the lower electrode for supplying radio frequency power, exciting the process gas inside the processing cavity to dissociate it into plasma gas, and allowing the plasma gas to deposit a thin film on the substrate. The upper electrode and the lower electrode are the same size or have a difference of ±10 mm, and the diameter of the lower electrode is smaller than that of the substrate, so that a uniform electric field is generated between the upper electrode and the lower electrode. The present invention can guarantee a uniform distribution of the electric field within the process cavity, resulting in good uniformity of the deposited thin film, and can particularly guarantee uniformity of the thin film even in continuous stacking of 300 layers or more to 1000 layers or more.

The utility model provides a kind of cell well plate, from bottom to top sequentially include substrate, middle layer, hydrophobic layer, the middle layer is equipped with a plurality of sample wells, the sample well is communicated with the substrate, electrode is provided on the substrate, and the electrode is located the sample well below;The electrode is used to generate uneven electric field, so that cell or bacteria is inclined to the side movement of uneven electric field and is settled in the bottom of the sample well;The middle layer is used to clean sample liquid;The hydrophobic layer is used to keep sample in the sample well and sample well between not connected and flows in series.The utility model adds electric field below well plate, improves cell settling velocity by dielectrophoresis force effect, and cell (or bacteria) is not easy to lose under the action of dielectrophoresis force after settling, and has better retention rate in laminar flow cleaning process.

The utility model provides a novel welding formula polyethylene cable y type seamless crosslinking structure, including connecting sleeve, through shielding layer, even conductor surface electric field, avoid partial discharge, through insulating layer, high temperature (90°C~130°C) resistance, high dielectric strength, environmental stress cracking resistance, through insulating shielding layer, with insulating layer close adhesion, even electric field distribution, reduce the risk of partial discharge at insulating interface, through metal shielding layer, short -circuit current conduction passage, electromagnetic shield, reduce the outside interference, mechanical protection, through outer sheath, waterproof, prevent chemical corrosion, prevent ultraviolet, mechanical protection, resist wear and tear in the laying or operation, through filling layer, fill multicore cable gap, keep structure round, prevent longitudinal water seepage, add peroxide crosslinking agent when extruding polyethylene insulating layer, make polyethylene molecular chain crosslinking into three -dimensional net structure through high temperature (such as three layer co -extrusion process), insulating layer is continuously formed in the production line, no subsection joint.

This utility model relates to the field of electrostatic precipitator technology, and its purpose is to provide a dust collection structure for the final stage electric field of an electrostatic precipitator, including a composite cathode wire and a dust collection plate. The composite cathode wire is a novel herringbone wire or a novel wide-body cathode wire. This utility model uses a novel herringbone wire or a novel wide-body cathode wire as the discharge zone of the final stage electric field of the electrostatic precipitator, resulting in a small corona current. It forms a uniform line-to-plate electric field with high and uniform electric field strength, which is beneficial for collecting dust with high resistivity and fine dust. It also helps prevent back corona phenomena, increasing the applicable range of dust resistivity for the electrostatic precipitator and significantly improving the dust removal efficiency and operational stability of the electrostatic precipitator.

This application discloses a voltage equalization enclosure and a gas insulation device for conductor connection in the field of power equipment technology. The voltage equalization enclosure is used for the interconnection of busbars and includes an end face and a smooth outer surface formed by a side face with rotational symmetry. The outer surface is a conductor. The side face and the end face are smoothly transitioned. The end face has more than one slot, and all slots are connected at the geometric center of the side face. The slot is used for the insertion and overlapping of busbar connectors. The side face has fastener mounting holes in a direction perpendicular to the overlapping surface of the busbar connectors. After fastening, the fasteners are submerged in the side face. The outline of the slot on the end face is a smooth curve. This solution solves the problem that the insulation performance of the existing conductor connection structure is not suitable for environmentally friendly insulating gases with weak insulation performance. It achieves the beneficial effects of uniform electric field, improved insulation performance between parts, and the use of multiple conductor structures.

The application discloses a non-uniform electric field measurement correction method and device, and relates to the technical field of electric field measurement, wherein the method comprises the following steps: collecting a measured electric field value of an electric field sensor in a to-be-measured electric field, and simultaneously determining inherent parameters of the sensor, such as geometric dimensions and dielectric constant; then, in combination with inter-plate gap related parameters, a first correction coefficient for compensating for volume invasion of the sensor into electric field distortion is calculated; subsequently, according to electric field gradients of the to-be-measured electric field in the sensitive axis and the vertical direction of the sensor, and in combination with the geometric dimension parameters, a second correction coefficient representing the deviation of electric field non-uniformity is obtained; finally, the two correction coefficients are comprehensively used to obtain a total correction coefficient, the measured electric field value is corrected, a real electric field value is obtained, and the non-uniform electric field measurement correction is completed. The application realizes multi-scene low-cost application by being compatible with various electric field sensors, solves the problems of poor adaptability and high application cost, and widens the application range.

The application discloses a mixture material dielectric property nonlinear mapping sorting method of high-dimensional manifold learning, and belongs to the technical field of intelligent sorting of regenerated plastics. Real-time scanning is performed on mixed plastic particles on a conveying channel to obtain real part and imaginary part data of complex dielectric constant at multiple characteristic frequencies, and a high-dimensional original characteristic vector is constructed. After white pre-processing, a local linear embedding algorithm is used to nonlinearly map the high-dimensional characteristics to a low-dimensional manifold space, and the essential dielectric characteristics of the material are retained. In the low-dimensional space, a nonlinear classification hyperplane is constructed based on a support vector machine to realize accurate identification of ABS plastics and impurity plastics. According to the identification result, the electrode voltage amplitude and polarity of a high-voltage electrostatic sorting machine are dynamically adjusted, a non-uniform electric field is constructed, and the motion trajectory of the particles is separated by using the coupling action of differential electrostatic force and gravity to make the target material and impurities fall into corresponding collecting hoppers. The application effectively distinguishes mixed plastics with similar dielectric properties, and improves the sorting precision and working condition adaptability.

The application discloses a preparation method of a micro drill with an extremely small diameter, relates to the technical field of micro drill preparation, and utilizes a high-pressure dielectrophoresis field to perform non-uniform electric field sorting on an intermediate III, promotes directional aggregation of a high-crystalline hard tungsten carbide region, performs dynamic flow state screening through a butyl / octyl functionalized porous ceramic medium bed, selectively adsorbs and removes a weakened region and a defect zone at a coating-substrate interface, guides microstructure ordered recombination of a drill tip region, obtains an intermediate IV, carves out a micro drill structure with an extremely small diameter from the intermediate IV, supplements electrolytic polishing treatment in a non-rake surface region, obtains a finished micro drill, performs annealing on the finished micro drill, and adopts oxygen plasma to perform passivation treatment on the surface of the finished micro drill, so that the finished micro drill with an extremely small diameter is obtained through a post-processing procedure. The preparation method significantly improves the comprehensive mechanical properties and service life of the micro drill with an extremely small diameter.