28 results about "Liquid dielectric" patented technology

A metal automatic processing machine tool operation state prediction system of the present invention belongs to the technical field of automatic processing, and comprises a data acquisition module used for acquiring multi-scale physical parameters representing the machine tool operation state in real time, the multi-scale physical parameters comprise a structure thermal gradient tensor, a kurtosis change rate of a tool interface signal, a relative fluctuation value of a cooling liquid dielectric constant and an environment low-frequency seismic noise spectrum; the dynamic instability risk coupling module is used for determining a harmonic locking risk index based on the multi-scale physical parameters acquired by the data acquisition module; and the risk level evaluation module is used for determining a current system operation risk level based on the harmonic locking risk index determined by the dynamic instability risk coupling module and generating a normalized risk evaluation index.

The invention discloses a modeling method for a streamer discharge process in natural ester insulating oil by considering ionization in bubbles. The modeling method comprises the following steps: 1) constructing a two-dimensional non-axisymmetric model for simulating discharge of bubbles to streamers in the natural ester insulating oil under lightning impulse voltage; 2) introducing a plasma chemical reaction, and constructing a natural ester insulating oil stream discharge electrohydrodynamic model coupled with an ionization process of gas molecules in bubbles; and after a set voltage is applied to the two-dimensional non-axisymmetric model, the natural ester insulating oil streamer discharge electro-hydrodynamic model simulates a natural ester insulating oil streamer morphology evolution process. According to the method, the drift-diffusion-reaction process of the plasma in the bubble and the Poisson equation are subjected to self-consistent solution, and the plasma generation process in the bubble under the strong electric field is integrated into the existing streamer discharge model, so that the method is beneficial to understanding the liquid dielectric breakdown theory.

The present invention relates to a specific combination of esters, a composition comprising it, and its uses as a lubricant and / or liquid dielectric coolant.

The invention discloses a method and device for treating garbage malodorous gas through gas-liquid dielectric barrier discharge coupled catalysis, and the device comprises a low-voltage electrode which is cylindrical and is vertically arranged, the lower part of the low-voltage electrode is provided with a gas inlet and an absorption liquid outlet, and the upper part of the low-voltage electrode is provided with an absorption liquid inlet and a gas outlet; the high-voltage electrode is located at the axis of the low-voltage electrode; the blocking medium is attached to the inner wall of the low-voltage electrode; the absorption liquid distributors are annular and located at different heights of the inner wall of the blocking medium, alkaline absorption liquid is introduced into the absorption liquid distributor at the top layer through an absorption liquid inlet, and a flowing liquid film from top to bottom is formed on the inner wall of the blocking medium under redistribution of the absorption liquid distributors; and the catalyst bed layers are arranged between the barrier medium and the high-voltage electrode and are distributed at intervals along the axial direction of the high-voltage electrode. Chemical absorption, plasma and heterogeneous catalysis are coupled in the same space, the malodorous gas degradation efficiency is improved, meanwhile, the treatment cost of dielectric barrier discharge plasma is reduced, and secondary pollution caused by ozone is reduced.

The present invention provides an actuator that can easily adjust the electrostatic stress acting between electrodes. [Solution] The actuator comprises an insulating flexible bag that forms a housing, a liquid dielectric filled inside the flexible bag, a plurality of electrodes arranged on the inner circumferential surface of the flexible bag whose separation distance changes according to the applied voltage, an expansion section in which the liquid dielectric present between the electrodes flows in and expands in volume when the separation distance between the electrodes decreases, and a separator inserted between the electrodes. The separator is in the form of a film with its front and back surfaces facing the electrodes and has through holes that penetrate in the thickness direction. As a result, the applied voltage is directly applied to the capacitor portion where only liquid dielectric is filled between the electrodes, and by adjusting the relative permittivity of the liquid dielectric, the amount of charge induced between the electrodes can be adjusted accordingly.

The application discloses a kind of embedded patterned resistive film's laminated transparent stealth superstructure and preparation method, belong to transparent electromagnetic stealth structure technical field.Embedded patterned resistive film's laminated transparent stealth superstructure, including patterned wave-absorbing layer, dielectric layer, frame, frame sealing plate and reflective back plate.Patterned wave-absorbing layer includes N layer patterned conductive film and N layer support substrate.Support substrate is placed below patterned conductive film.Patterned conductive film includes patterned conductive material and substrate.Conductive material is patterned on the surface of substrate.Forming.By customizing N layer optically transparent frequency selective surface conductive film geometric pattern, realize laminated multi-frequency point resonance, adopt multi-layer frequency selective surface laminated interface resonance loss wave absorption.Dielectric layer includes N+1 layer transparent dielectric, by transparent liquid material solidification forming.Preparation method uses embedded patterned resistive film and liquid dielectric layer frame mold solidification manufacturing process, so that transparent stealth superstructure is not easy to delaminate, and mechanical reliability is high.

Methods and techniques are provided for using a conductive epoxy to create interconnects across a gap between an embedded integrated circuit chip and a dielectric substrate. The chosen epoxy is adhesive and thixotropic so that it sticks well and won't lose its volume after a drying process. Further, a liquid dielectric ink is used as an underfill material to not only cover and protect the interconnects but also act as a dielectric layer. This allows as for additional dielectric layers with corresponding interconnects and vias to form a multilayer structure with additional embedded chips. The disclosed methods and techniques can be implemented using direct print additive manufacturing processes.

The present application belongs to the field of insulation test, and relates to a plant oil paper composite insulation electrical performance test device and method. The test device comprises an upper section test oil tank and a lower section oil storage oil tank. A support frame is fixedly installed inside the upper section test oil tank, and an electrode device is fixedly installed on the support frame. The electrode device comprises a windowed insulation paper board, two voltage grading rings and an electrode. The electrode is a copper conductor with insulation, which is bent into a T-shaped hanger shape. The test method comprises the following steps: press the plant insulation liquid dielectric from the lower section oil storage oil tank into the upper section test oil tank through a connecting pipe until the electrode device is covered; simulate the change of the electrode gap, i.e. the oil gap, by adjusting the distance between the long oval circles of the electrode; simulate the change of the turn insulation specification by changing the thickness of the insulation paper of the electrode; and realize the test under different operating conditions. The test device is convenient to disassemble and oil injection, strictly controls a single variable, and reduces the influence of the oxidation degree of the insulation oil and impurities on the test.

The application discloses application of an active double-mode microwave micro-flow sensor to liquid dielectric constant detection. The double-mode resonant unit is formed by a microstrip line and a split ring resonator, and has high and low resonant frequency points. The low-frequency resonant frequency point moves to a low frequency with the increase of the dielectric constant, and the high-frequency frequency point moves to a high frequency with the increase of the dielectric constant, thereby effectively increasing the sensitivity of the passive resonant unit. A negative impedance circuit is embedded at the rear end of the microwave passive sensor to form an oscillator, namely a microwave passive resonator and a radio frequency amplifier, and the oscillation frequency changes with the change of the dielectric constant of the material to be detected, and the change of the dielectric constant is mapped to the change of the oscillation frequency. The relationship between the dielectric constant and the resonant frequency is converted to the relationship between the dielectric constant and the direct current voltage through a demodulation circuit. The application has the advantages of high sensitivity, low price, convenience for carrying, etc., and is a high-performance and low-cost system-level detection device which will play an important role in the detection field of liquid materials.

The embodiment of the application relates to the measurement technical field for diagnostic purposes, in particular to an intracranial hemorrhage detection device, which comprises a containing part, a base, a flexible headgear and a signal emission and collection assembly. The containing part is arranged on the base; the containing part forms a containing space for containing a patient's cranium; the flexible headgear is arranged in the containing space and is arranged to be capable of filling liquid dielectric and capable of being deformed after being pressurized; the signal emission and collection assembly is used for emitting microwave signals to the flexible headgear and receiving microwave signals from the flexible headgear; wherein the base is arranged to be capable of discharging the leaked liquid outward when the liquid dielectric leaks. The embodiment of the application is arranged to have the flexible headgear, which is beneficial to improving the transmission efficiency of the microwave signals; and when the liquid dielectric leaks, the leaked liquid can be discharged outward, so that the leaked liquid dielectric cannot cause mildew or cause pollution to the signal emission and collection assembly.

Nanoparticle compositions with enhancing dispersibility and long-term stability that can increase thermal conductivity of a dielectric fluid and improving insulation material lifetime, methods of manufacturing the nanoparticle compositions, and dielectric nanofluid compositions with the nanoparticles are provided herein. The nanoparticle compositions may include a metal oxide core and an organofunctional silane shell covering the TiO2 core, wherein the organofunctional silane shell is a structure represented by R1—Si(OR2)3.

This application relates to the technical field of reactive power compensation, disclosing a reactive power compensation method, system, and storage medium based on an asynchronous motor and a capacitor. The method involves placing a liquid dielectric capacitor next to the asynchronous motor, connecting it to the starting circuit during startup, opening the injection and return solenoid valves, and adjusting the dielectric injection speed in a positive correlation with the motor speed. Once the injection volume reaches the target or startup is complete, injection stops and the state is switched. Injection can be adjusted by cooperating with a hydraulic coupler and a dielectric pump, or the motor can be reversed / linked with an air pump to recover the dielectric during shutdown. Alternatively, the opening and closing degree of the solenoid valve can be adjusted in a positive correlation with the target flow rate, and the return gas pipe pressure can be adjusted in a negative correlation with the target gas flow rate, or the coupling degree of the hydraulic coupler, the opening and closing degree of the solenoid valve, and the height of the return gas pipe inlet can be adjusted in a negative correlation. This method achieves harmonic-free soft start, power factor compensation to 1, avoids the risk of self-excitation during shutdown, simplifies the structure, and has low energy consumption.

The invention relates to the technical field of reactive compensation, and discloses a reactive compensation method and system based on an asynchronous motor and a capacitor and a storage medium, and the method comprises the steps: arranging a liquid dielectric capacitor beside the asynchronous motor, connecting a starting loop during starting, opening an injection and air return solenoid valve, and adjusting the dielectric injection speed according to the positive correlation of the rotating speed of the motor; after the injection amount reaches the standard or starting is completed, injection is stopped, and the state is switched. Injection can be adjusted through cooperation of the hydraulic coupler and the dielectric medium pump, or the motor is controlled to rotate reversely or the inflation pump is linked to recycle the dielectric medium during shutdown; the opening degree of the electromagnetic valve can be adjusted according to positive correlation of the target flow speed, the compression degree of the gas return pipe can be adjusted according to negative correlation of the target gas flow speed, or the coupling degree of the hydraulic coupler, the opening degree of the electromagnetic valve and the gas inlet height of the gas return pipe can be adjusted according to negative correlation. According to the method, non-harmonic soft start is realized, the power factor is compensated to 1, the shutdown self-excitation risk is avoided, the structure is simplified, and the energy consumption is low.

Liquefied natural gas has brought about energy hegemonism and environmental destruction. This liquefied natural gas is, however, a liquid dielectric which can be liquefied easily by applying pressure at room temperature, expands in volume by more than 250 times when vaporized, and has a relatively high dielectric constant and a relatively low withstand voltage. As a capacitor, this liquid dielectric is regarded; the energy of the liquid dielectric capacitor is consumed inside the capacitor for use in engines, welding, or producing buoyancy gas, or consumed outside the capacitor for use as an on-board capacitor for a vehicle. The liquid dielectric capacitor is considered to be a dielectric breakdown-inducing igniter as an alternative to the conventional spark plug. In order to utilize the principle of this igniter as an energy source for an engine, a welding device or a gas production device for a buoyancy bag used to lift off seabed resources, an electric charge is applied to a liquid dielectric thin layer, then the thickness of the liquid dielectric thin layer is brought close to zero to cause dielectric breakdown, or the thickness of the liquid dielectric thin layer is increased to create a high voltage source for an on-board capacitor for a vehicle. Thus, a world without environmental destruction is achieved.

The invention relates to the technical field of underwater bionic mechanical equipment, in particular to a sensing underwater bionic mechanical gripper and a manufacturing method thereof. The grabbing hand comprises a supporting assembly and three grabbing assemblies connected in parallel. Each grabbing assembly is composed of a supporting module, a driving module, a sensing module and a power supply control module. The supporting module is used for hinging the three hardened layers into a double-joint linkage structure through a pre-stretching elastic hinge layer; the driving module comprises two self-healing electrostatic hydraulic drivers which are both of elastic bag-shaped structures, liquid dielectric insulating oil is injected into the drivers, silver electrodes are arranged on the surfaces of the drivers, and the drivers are fixed to the elastic hinge sides between the hardened layers respectively. The sensing module is a customized porous conductive sponge sensor and is used for monitoring contact force; the power supply control module achieves power supply and cooperative control, and the supporting assembly fixes the grabbing assemblies and the power supply control module. According to the robot, rigid driving equipment is not needed, the self-repairing capacity and the real-time sensing function are achieved, the robot can adapt to the complex underwater environment, the grabbing stability is improved, and the cost is low.

An electro-hydraulic actuator includes a deformable shell defining an enclosed internal cavity and containing a liquid dielectric, first and second electrodes on first and second sides, respectively, of the enclosed internal cavity. An electrostatic force between the first and second electrodes upon application of a voltage to one of the electrodes draws the electrodes towards each other to displace the liquid dielectric within the enclosed internal cavity. The shell includes active and inactive areas such that the electrostatic forces between the first and second electrodes displaces the liquid dielectric within the enclosed internal cavity from the active area of the shell to the inactive area of the shell. The first and second electrodes, the deformable shell, and the liquid dielectric cooperate to form a self-healing capacitor, and the liquid dielectric is configured for automatically filling breaches in the liquid dielectric resulting from dielectric breakdown.

The invention discloses a liquid dielectric constant scalar measurement system based on a short-circuit transmission line, which comprises a controller, the controller is sequentially connected with a signal generator, a coupler and a measurement probe through transmission lines, the coupler is further connected with a detector a and a detector b through transmission lines, and the detector a and the detector b are further connected with the controller through transmission lines. The problems that in the prior art, a capacitance method is limited by the non-ideal diffusion characteristic of an actual polar plate edge electric field, the measured value is high, and the high-precision measurement requirement is difficult to meet are solved. The invention further discloses a liquid dielectric constant scalar measurement method based on the short-circuit transmission line.

An electro-hydraulic actuator includes a deformable shell defining an enclosed internal cavity and containing a liquid dielectric, first and second electrodes on first and second sides, respectively, of the enclosed internal cavity. An electrostatic force between the first and second electrodes upon application of a voltage to one of the electrodes draws the electrodes towards each other to displace the liquid dielectric within the enclosed internal cavity. The shell includes active and inactive areas such that the electrostatic forces between the first and second electrodes displaces the liquid dielectric within the enclosed internal cavity from the active area of the shell to the inactive area of the shell. The first and second electrodes, the deformable shell, and the liquid dielectric cooperate to form a self-healing capacitor, and the liquid dielectric is configured for automatically filling breaches in the liquid dielectric resulting from dielectric breakdown.

A flexible membrane container for thermal management of an electronic object, the flexible membrane container comprising a first flexible membrane defining a bag-like container having a first interior volume, the container having an opening for removably receiving an electronic object. At least one outflow conduit is disposed in fluid communication with the first interior volume, and at least one inflow conduit is disposed in fluid communication with the first interior volume, thereby enabling a liquid dielectric coolant from a source external to the flexible membrane container to enter into the first interior volume. An insert frame member having a header is configured for releasably attaching to the electronic object. The header provides controls and power connectivity for electronic communication with the electronic object.

This invention relates to the use of a combination of monohydric alcohol fatty acid esters and diesters as a liquid dielectric coolant.

A flexible membrane container for thermal management of an electronic object, the flexible membrane container comprising a first flexible membrane defining a bag-like container having a first interior volume, the container having an opening for removably receiving an electronic object. At least one outflow conduit is disposed in fluid communication with the first interior volume, and at least one inflow conduit is disposed in fluid communication with the first interior volume, thereby enabling a liquid dielectric coolant from a source external to the flexible membrane container to enter into the first interior volume. An insert frame member having a header is configured for releasably attaching to the electronic object. The header provides controls and power connectivity for electronic communication with the electronic object.

A device and a method to accurately measure a dielectric constant of a dielectric are disclosed. The method may include immersing a part of the device, the part including a micro-channel, in a container containing a liquid dielectric and waiting for a set time, curing the liquid dielectric that entered the micro-channel, and measuring the dielectric constant of the dielectric inside the micro-channel.

This invention discloses a liquid dielectric rod antenna with reconfigurable polarization, comprising an antenna housing, a metal waveguide, a loading container, an RF coaxial probe, and a metal cylinder. The antenna housing is mounted on the metal waveguide, with helical first to third channels arranged along its axis. The loading container has excitation channels passing through its two sides and sealed to the container. The metal waveguide encloses the loading container and has mounting holes communicating with the excitation channels. The inner conductor of the RF coaxial probe extends into the excitation channels and connects to the metal cylinder. The loading container is filled with dimethyl silicone oil. When tetrahydrofuran is injected into the first channel, the dielectric rod antenna operates in circular polarization mode; when tetrahydrofuran is injected into the first to third channels simultaneously, the dielectric rod antenna operates in linear polarization mode. This invention solves the problem that traditional dielectric rod antennas can only operate in a single polarization mode, and has great potential in future wireless communications.

The invention belongs to the technical field of electronic measurement, and particularly relates to a liquid dielectric constant measuring system and method based on an RC transient state. The measuring system comprises a liquid storage container, a measuring circuit, a signal processor and a display terminal, the measuring circuit comprises a parallel-plate capacitor, two polar plates of the parallel-plate capacitor are respectively fixed on opposite inner walls of the liquid storage container, the parallel-plate capacitor is connected with the signal processor, and the signal processor is connected with the display terminal; to-be-detected liquid is injected into the liquid storage container, the parallel plate capacitor is controlled to be charged, the signal processor collects transient voltage-time original data in the charging process of the parallel plate capacitor and transmits the collected data to the display terminal, the display terminal processes the transient voltage-time original data based on an RC zero-state response algorithm, and the display terminal displays the processed transient voltage-time original data. And obtaining and displaying the dielectric constant of the to-be-measured liquid. According to the invention, high-precision, rapid and low-cost liquid dielectric constant measurement can be realized.

The application discloses a double-sided attached liquid dielectric constant detection microwave sensor and belongs to the technical field of microwave sensors. The sensor mainly comprises a thin-wall container 3, a metal defect-free film 1 closely attached to the inner wall of the thin-wall container 3, and a metal microstrip line film 2 attached to the outer wall of the thin-wall container 3; the metal defect-free film 1 and the metal microstrip line film 2 are attached to the inner and outer walls of the same part of the thin-wall container 3, and the lower edges of the two films are flush; the metal defect-free film 1 is composed of a flexible dielectric substrate 5 and a metal reference ground 4 printed on the flexible dielectric substrate 5, the metal reference ground 4 is etched with a nested complementary split ring resonator (NCSRR) 10, and the NCSRR 10 is a dumbbell-shaped CSRR 21 internally nested with a dumbbell-shaped split ring resonator (SRR) 22 which is the same in shape. The microwave sensor is not limited to a rigid flat plate structure, can be used on some substrates with arc shapes, and makes the selection of the substrate more flexible; the new resonance structure NCSRR is proposed, so that the sensitivity is significantly improved, and the quality factor is also improved correspondingly.

This invention provides a high-voltage variable capacitor and its method of use, comprising: a sealable housing assembly with ports; an electrode assembly mounted within the cavity of the housing assembly, the capacitance value of which is adjusted by changing the effective overlap area between the electrodes; and an insulating fluid dielectric filling the cavity to immerse the electrode assembly; the fluid dielectric is a liquid dielectric. This invention also provides a method for operating the capacitor, comprising draining the original first fluid dielectric from the cavity and injecting a second fluid dielectric with a different dielectric constant. Through this structure and method, the user can replace different types of fluid dielectrics, thereby changing the overall capacitance adjustment range and voltage rating of the capacitor. The capacitor of this invention has the advantages of high voltage resistance, small size, high power carrying capacity, flexible application, and relatively low cost.

The invention discloses a wireless sensing method and system for an intelligent dexterous hand with a body, is used for identifying a container containing target liquid from a group of same transparent containers, and belongs to the technical field of robots and intelligent systems with bodies. And a liquid dielectric-optical fingerprint database of the liquid is established in combination with robot visual identification and a trained dielectric constant prediction model, so that the robot can judge whether the type of the liquid in the grasping container is a target type or not according to an instruction. The method is suitable for scenes such as home nursing and liquid carrying, and can be widely applied to application environments such as industrial quality inspection, medical assistance and smart home. Compared with a traditional robot, the recognition efficiency and accuracy are improved through the integrated design, and the intelligent requirements for real-time liquid attribute recognition and carrying grabbing in different scenes are met.

Embodiments of the present application provide a display device and a display apparatus. The display device comprises: a first substrate; a second substrate forming a containing space, comprising a display area and a camera area; a black matrix layer, the black matrix layer having a plurality of first openings; a first surface electrode layer; a slope structure; a second surface electrode layer, covering at least one side of the slope structure close to the first substrate; a liquid dielectric layer comprising a plurality of light-shielding ions; and an imaging element. Embodiments of the present application effectively simplify the volume and complexity of the display device by integrating the camera area and the display area on the display device. The small aperture imaging method is adopted to reduce the camera spacing and the shooting angle interval. A plurality of first openings correspond to one imaging element, and the first openings are selectively opened by time sharing or on demand to reduce the production cost of the device. The slope structure forms a light waveguide light path design, so that the camera area and the display area are integrated, and the light and thin requirements of the display device are met.