44results about "Material breakdown voltage" patented technology

This invention relates to the field of simulation verification device technology, and discloses an environmentally friendly insulating gas simulation verification device, including a housing with an internal cavity, and two shells disposed inside the cavity, each capable of rotating about its own central axis. The invention utilizes the rotation of the shells around their central axes to move a first and second protrusion along the central axis of the shells, causing them to protrude a certain distance from the surface of the shells. This results in an uneven electrode surface formed by the three components. By gradually adjusting the voltage and observing the current change between a pair of electrodes, the device can detect the voltage at which SF6 gas breaks down and loses its insulating properties. This design, which creates an uneven electrode surface, accurately reflects the usage scenario, ensuring the accuracy of the test results and enabling the safe use of SF6 gas.

Disclosed in the present invention are an aging performance influencing factor determination method and apparatus for a solid insulating material, a terminal device, a storage medium and an aging performance evaluation method. The aging performance influencing factor determination method comprises: on the basis of the number of aging performance influencing factors to be selected of a solid insulating material and the number of corresponding factor levels, determining an orthogonal experimental solution; acquiring the breakdown strength of the insulating material under different factor levels of each of said aging performance influencing factors, the breakdown strength being obtained by means of the orthogonal experimental solution; on the basis of the breakdown strength, calculating the significant effect value of each of said aging performance influencing factors; and comparing the significant effect value of each of said aging performance influencing factors with a preset significance level, and determining, as a selected aging performance influencing factor, an influencing factor the corresponding significant effect value of which is lower than the preset significance level. The present invention can be used to effectively reduce the number of factor determination experiments, thereby saving time and resources.

This invention discloses a method for testing the insulation strength of the inner surface of ceramics, belonging to the field of ceramic materials technology. The sealing component consists of a ceramic part and metal cover plates. An inner platform is provided on the inner wall of the ceramic part, and two metal cover plates are sealed to the inner platform with solder. An intermediate cavity is left between the ceramic part and the metal cover plates. During testing, measuring electrodes are first connected to the metal cover plates, and then the sealing component is placed in an insulating medium for power frequency withstand voltage testing. The initial test voltage starts from 30-90 kV, with a stabilization time of 1-2 minutes. The voltage is increased by 1-10 kV each time until the ceramic part breaks down at the surface. The ratio of the breakdown voltage to the height of the inner platform is used to obtain the insulation strength of the inner surface of the ceramic part. Because the distance between the inner and outer surfaces of the ceramic part is much smaller than that between the outer and outer surfaces, and the outer surface is immersed in the insulating medium, the inner surface breaks down preferentially during measurement, thus effectively measuring the insulation strength of the inner surface of the ceramic part.

For non-destructively measuring the yield strength of a metallic member using magnetic incremental permeability, a quasi-static excitation magnetic field is applied to two points of the metallic member, while a small alternating magnetic field generated by a transmitting coil is applied to the metal member. Intensity of the quasi-static excitation magnetic field applied to the metallic member is measured using a Hall sensor. The magnetic field induced by the magnetized metallic member is detected using a sensing coil. Using signals from the Hall sensor and the sensing coil, a reversible permeability (MIP) of the metallic member is obtained. A grain size of the metallic member is obtained from the relationship between the reversible permeability and the grain size of the metallic member, and the yield strength of the metallic member is calculated using the grain size. The grain size and yield strength of the metallic member can be measured non-destructively.

The invention relates to the technical field of cable manufacturing, and provides a multi-core PVC cable splitting and integrating device which comprises a pay-off system, a splitting and integrating system and a winding system. The pay-off system comprises a base, a plurality of pay-off racks and a plurality of driving parts; the pay-off racks are rotationally connected to one side of the base under the driving of the driving parts, and the multiple pay-off racks are arranged at intervals in the length direction and the width direction of the base; the separating and combining system comprises a rack, a first guide assembly, a dispensing assembly and a heating assembly; the first guide assembly is used for guiding core wires led out by the pay-off rack, the dispensing assembly is used for dispensing and fixing all the core wires, and the heating assembly is used for shortening the drying time of glue; and the winding system is used for winding the cable. On the basis, the microwave coaxial performance can be met, and meanwhile the requirement for manufacturing multi-core PVC cables of different lengths can be met. In addition, the invention further provides a manufacturing process of the multi-core PVC cable.

The application discloses a kind of for cable trench waterproof layer integrity electric spark nondestructive testing evaluation method, belong to nondestructive testing technical field, it includes by preset mobile electrode applies multi-frequency electric signal;Real-time acquisition mobile electrode and the initial contact pressure of waterproof layer surface, adjust the pressure of mobile electrode contact position, capture the electric spark signal generated by the multi-frequency electric signal applied by mobile electrode at the defect of cable trench waterproof layer, extract the characteristic parameter of electric spark signal to generate current electric spark characteristic data;Current electric spark characteristic data is used to distinguish defect type, to generate defect evaluation result;According to defect evaluation result, output defect distribution information and trigger sound light alarm.The application adopts multi-frequency electric signal excitation, electric spark signal feature extraction and analysis combined detection mode, can distinguish waterproof layer defect type, evaluate its severity, improve the accuracy of detection.

The invention discloses a hot-pressing defect detection method and system for a multi-layer anti-corrosion composite lining plate, and the method comprises the steps: putting the multi-layer anti-corrosion composite lining plate made of a PTEF plate, a PFA plate and a PET plate into a hot press, and executing a hot-pressing process; carrying out on-line electric spark detection and extracting key features from an on-line electric spark detection result; judging whether the multi-layer composite anti-corrosion lining plate has defects or not and the types of the defects according to the key features; automatically triggering a preset repair strategy or a high-level alarm according to a specific defect type after judging that the defect exists; and after the hot pressing process is finished, the multi-layer composite anti-corrosion lining plate is subjected to pressure maintaining and cooling to be below the preset cooling temperature, the multi-layer composite anti-corrosion lining plate is taken out and subjected to off-line comprehensive detection, and whether defects exist or not is judged again. The online quality monitoring system is integrated in the hot-pressing process, so that real-time quality feedback and process control are realized, zero defect of products is ensured, and the production efficiency is improved.

The invention discloses a ternary mixed insulating oil configuration evaluation device and evaluation method, and belongs to the technical field of transformer insulating oil evaluation. The evaluation device comprises a computer, an oil breakdown voltage detection device, an oil dielectric loss detection device, an oil viscosity measurement device, a device for detecting total hydrocarbon gas in oil and a heating device. The ternary mixed oil storage device is connected with each detection device; characterizing an insulating property state quantity through breakdown voltage, and characterizing a dielectric loss state quantity through dielectric loss; the viscosity state quantity is represented through the oil viscosity; the stable state quantity of the current ternary mixed insulating oil is formed through the total hydrocarbon content in the oil after breakdown; obtaining an evaluation coefficient according to the state quantity; according to the method, the interference of human factors is avoided, the evaluation result can reflect the configuration state of the ternary mixed insulating oil more actually, and the problem that the ternary mixed insulating oil prepared in different proportions cannot be comprehensively and systematically evaluated is solved.

The application discloses a kind of parallel layer electrical strength test methods of fiber reinforced epoxy resin insulating pipe, comprising: obtaining the parallel layer sample of multiple fiber reinforced epoxy resin insulating pipes;On each parallel layer sample, a plurality of equal-diameter circular holes are uniformly opened;The parallel layer sample is placed in transformer oil, the transformer oil is heated to preset temperature, and the voltage is gradually increased to the circular hole of the parallel layer sample Breakdown;The median value of the voltage of the circular hole breakdown of multiple parallel layer samples is used as the value of the electrical strength of the parallel layer of the fiber reinforced epoxy resin insulating pipe.Solve the problem that the electrical strength of the fiber reinforced epoxy resin insulating pipe for ultra-high voltage electrical equipment is higher, and the existing standard specifies that the test method is difficult to effectively determine.

The application relates to the field of electrical performance detection of insulating materials, in particular to a sample preparation method and a test method for crosslinking gel breakdown strength. The sample preparation method and the test method for crosslinking gel breakdown strength comprise the following steps: S1, preparing a vulcanized silicone rubber sheet with a thickness of 2 mm + / - 0.2 mm; S2, opening a round hole or a square hole in the center of the vulcanized silicone rubber sheet; S3, taking a hard smooth flat plate as a bottom plate, spraying a release agent, and placing the hole-opened vulcanized silicone rubber sheet in S2 on the bottom plate; S4, pouring unhardened gel liquid into the hole of the vulcanized silicone rubber sheet, and completing hardening according to the gel liquid hardening condition; S5, after the gel liquid is hardened, the vulcanized silicone rubber sheet and the gel are bonded together, the gel is supported, the vulcanized silicone rubber sheet is slowly taken off from the bottom plate, and the sample preparation is completed. The application can measure the breakdown strength of gels which are difficult to form.

The utility model discloses an accurate detection device for the continuity of a varnished wire paint film, and relates to the technical field of varnished wires. The tester comprises a tester body, one side of the tester body is fixedly embedded with a control panel and a display screen, one side of the tester body is rotatably connected with a plurality of conductive guide wheels, two sides of the tester body are respectively and fixedly provided with a pay-off assembly and a take-up assembly, and the pay-off assembly and the take-up assembly are consistent in structure and are symmetrically arranged. The take-up assembly comprises a mounting plate fixedly arranged on one side of the tester body, a movable seat rotatably penetrates through one side of the mounting plate, a plurality of uniformly distributed sliding grooves are formed in the outer wall of the movable seat, and sliding plates are slidably connected into the sliding grooves. According to the sample wire take-up device, an operator can conveniently and rapidly unload a wound sample wire, the time and energy of the operator are saved, winding drums of various specifications can be used for supporting, the sample wire can be paid off through the winding drums, the winding drums can be installed on the take-up assembly for take-up, and use is flexible and convenient.

The invention provides a line detection system. The line detection system comprises an unmanned aerial vehicle, a cable walking vehicle, a mobile imaging device and a control device, the unmanned aerial vehicle is used for transporting the cable walking vehicle to a to-be-detected line; the cable walking vehicle comprises a driving module, a guiding and supporting module, a hoisting and positioning module and a power supply module. The mobile imaging device comprises an X-ray imaging module and a driving module. And the control device is used for sending instructions to the unmanned aerial vehicle system, the cable walking vehicle and the mobile imaging device and receiving data returned by the unmanned aerial vehicle system, the cable walking vehicle and the mobile imaging device to obtain a detection result. The line detection system can realize overall regulation and control of the unmanned aerial vehicle, the cable walking vehicle and the mobile imaging device through the control device, so that integrated operation of directional delivery, autonomous advancing and accurate detection of the power transmission line is realized, and the detection efficiency of the power transmission line is improved.

This invention belongs to the field of electrolytic capacitor testing technology, specifically relating to a rapid testing device and method for the hydration resistance of low-voltage aluminum electrolytic capacitors. The device includes a reflux device comprising a base, an oil bath, a double-necked flask, and a serpentine condenser. A support rod is fixedly mounted on top of the base. A screw block is threaded onto the outer side of the support rod. A support rod is integrally formed on one side of the screw block, and a tray is integrally formed at one end of the support rod. The serpentine condenser is connected to the top of the double-necked flask, and a limiting block is integrally formed on the outer side of its upper end. The limiting block is in contact with the upper surface of the tray. This invention can simulate the long-term hydration failure process of capacitors in a short time, significantly reducing the testing time. It also precisely controls the shaking amplitude, avoiding problems such as flask cracking, seal failure, and uneven water distribution, thus improving testing safety, stability, and accuracy without changing the original testing and judgment standards, closely conforming to the actual aging and failure mechanism of capacitors.

The invention discloses an insulating material dielectric strength evaluation method and system based on a trap level, belongs to the technical field of electrical equipment and electrical engineering, and is used for accurately evaluating the dielectric strength of an insulating material. The carrier mobility is calculated by collecting depolarization charge quantity attenuation curves of the insulating material after different polarization electric fields, the influence of the electric fields is corrected by adopting a Pole-Frenkel law, and trap level distribution of the insulating material under the different polarization electric fields is obtained. Through exponential decay function fitting, the influence of an electric field on a trap level is extrapolated to a higher electric field range, a corresponding limit trap level under a critical electric field is obtained, and a relation function with direct current breakdown field strength is established, so that the dielectric strength of the insulating material is accurately evaluated through the limit trap level.

The invention discloses a lubricating material electric corrosion test and quantitative analyzer and an analysis method thereof, and relates to the technical field of electric corrosion experiments.The device comprises a needle point electrode, a lubricating oil pool, a displacement driving mechanism and a circuit module, and the needle point of the needle point electrode vertically faces a metal sample. The geometric characteristic that the curvature radius of the tip of the needle tip electrode is extremely small is utilized, the discharge phenomenon is highly localized in a micro area below the needle tip, accurate positioning of the discharge position is achieved, and the problem of random distribution of discharge points on the surface of a ball electrode is solved; the high-precision displacement driving mechanism is used for precisely regulating and maintaining the micron-order gap between the needle point electrode and the metal sample, and the circuit module is combined to apply the pulse voltage with precise and controllable parameters, so that the consistency of the discharge energy and the action range of each time is jointly ensured; therefore, a single electric corrosion pit with determined position and highly repeated geometrical morphology can be prepared on the surface of the metal sample, and the core problems of strong discharge randomness and low morphology repeatability are effectively solved.

The application discloses a kind of deep cold temperature zone solid-liquid-gas three-state combination point insulating material flashover characteristic testing device, including test cavity, sample table, pressurization and current monitoring module, temperature control module, gas pressure control module and low-temperature liquid control module;Wherein, sample table is set in test cavity and connects sample table lifting device control test sample height, test cavity is used to provide low-temperature solid-liquid-gas three-state coexistence test environment, pressurization and current monitoring module is used to apply electric field on test sample surface and monitor current change, record flashover current waveform and protect circuit;Temperature control module is used to heat test sample single point and construct temperature gradient, and test sample different position temperature is monitored;Gas pressure control module is used to adjust gas phase environment gas pressure;Low-temperature liquid control module is used to regulate low-temperature liquid liquid level height.Can be carried out to insulating material in deep cold temperature zone solid-liquid-gas three-state combination point different low-temperature liquid, gas pressure, temperature gradient under insulating material surface direct current, alternating current and pulse flashover test.

The utility model discloses a cable accessory interface breakdown voltage testing device. The cable accessory interface breakdown voltage testing device comprises a conductor, a first shrinkage pipe, a second shrinkage pipe, a first electrode, a second electrode and voltage detection equipment. And the first shrinkage pipe wraps the outer wall of the conductor after being shrunk. And the second shrinkage pipe covers the outer wall of the first shrinkage pipe after being shrunk. The first electrode and the second electrode are arranged between the first shrinkage pipe and the second shrinkage pipe, and the first electrode and the second electrode are arranged at intervals in the axial direction. The voltage detection device is connected with the first electrode and the second electrode. According to the utility model, the interface breakdown voltage of the cable accessory can be rapidly, economically, effectively and accurately detected.

The invention discloses a coal mine roof rock loaded fracture discharge spark testing device and an ignition energy evaluation method. The coal mine roof rock loaded fracture discharge spark testing device comprises a closed explosion reaction box, a mechanical loading system driven by a hydraulic cylinder, a replaceable compression / shearing mold, a silver pole piece, a high-speed camera, a photoelectric detector, a gas environment control assembly, a data acquisition and processing unit and the like. The underground gas concentration environment is simulated through the gas environment control assembly, rock failure mode simulation is achieved through the mechanical loading system, and the multi-source assembly synchronously collects parameters such as the electric charge quantity, the voltage and the spark form. According to the evaluation method, a direct method and an indirect method are fused, effective ignition energy is output after data verification, and the risk is judged by comparing the effective ignition energy with an explosion threshold. The device can simulate the whole process of discharging electric sparks in a gas-containing environment and perform quantitative evaluation, realizes accurate quantification of ignition energy, provides data support for explosion risk evaluation of roof rocks with different lithology, assists coal mine gas explosion early warning, and ensures safe production.

The present application belongs to the technical field of generator stator coil material, and particularly relates to a method and system for evaluating the aging resistance of a generator stator coil in a high-altitude environment. Based on the research on the service characteristics and evolution law of the generator stator coil in a high-altitude environment, the present application proposes, for the first time, to evaluate the aging resistance of the generator stator coil by the following indexes: the breakdown voltage of the stator coil, the concentration of volatile organic compounds detected under the condition of thermal oxidative aging, the thermal conductivity, the specific surface area of solid substances, the porosity and the liquid adsorption performance. The evaluation method of the present application has the advantages of accuracy and rapidness, and has a good application prospect.

The invention discloses a capacitor film breakdown characteristic comprehensive test method and device, and relates to the technical field of power test. The device comprises a control device, and an oil immersion device, a film device, a grounding electrode device, a first power connection electrode device, a second power connection electrode device, a test power supply device and a test recording device which are electrically connected with the control device. Through cooperation of all the devices, the requirement for rapid and efficient testing of a large number of to-be-tested films can be met. Point testing and surface testing functions are achieved, and testing diversity is improved; in addition, the oil immersion device can be selected to enable the to-be-tested film to be in an oil immersion state, so that the test condition is closer to the actual operation condition, and the test accuracy is improved. And the test power supply device has a function of switching power supply output modes, so that a breakdown test under direct current can be carried out, and various voltages of other types can be applied to carry out tests in consideration of actual working conditions.

The invention discloses a contact material electric ablation morphology in-situ extraction system and method, and belongs to the field of contact material electric performance testing and electric contact failure analysis. The device comprises a bottom plate, a Z-axis electric sliding table, a movable contact clamp, a movable contact, a spring, an X-axis electric sliding table, a Y-axis manual sliding table, a static contact clamp, a static contact, a reference ruler, an industrial camera used for shooting the movable contact, a three-dimensional shape measuring instrument used for shooting the movable contact, an industrial camera used for shooting the static contact and a three-dimensional shape measuring instrument used for shooting the static contact. The system comprises a displacement sensor, a power supply, a load, a control switch, an industrial control computer and a single-chip microcomputer. The invention aims to provide a contact material electric ablation morphology in-situ extraction system and a contact state in-situ evaluation method so as to realize in-situ extraction of surface morphology characteristics of a contact material in an electric life experiment process and evaluate a contact state corresponding to a pairing position in the experiment process according to the electric ablation morphology of the contact material.

The utility model provides an electric spark detection device for metal surface detection, and relates to the technical field of electric spark detection, the electric spark detection device comprises a main machine and an installation assembly, one side of the main machine is provided with a button, one side of the main machine is provided with a knob, one side of the main machine is provided with a cable, one side of the cable is provided with a probe rod, and the probe rod is connected with the installation assembly. A probe is arranged on one side of the main machine, a probe brush is arranged on one side of the probe, a grounding wire is arranged on one side of the main machine, an anti-winding device is arranged on one side of the main machine through an installation assembly, and the anti-winding device conducts winding limiting on the unused part of a cable. The situation that when the probe moves, the unused part of the cable is moved and entangled, and then follow-up cable storage and use are affected is avoided, and therefore follow-up storage and use of the electric spark detector can be facilitated, and the use effect of the electric spark detector is improved.

A fluid electrical probe includes a body portion housing a cleaner, a head portion forming a gap, an electrode disposed in the gap, and a temperature sensor disposed in the gap. The cleaner is extendable into the gap to clean the electrode and the temperature sensor. The body portion comprises a handle configured to be gripped by an operator.

The invention provides an air gap breakdown risk calculation and air gap interval design method based on an oscillation attenuation impulse voltage parameter domain, and the method comprises the steps: S1, collecting test data, including a gap length, an attenuation length, an oscillation dominant frequency and a corresponding 50% breakdown voltage; s2, constructing a breakdown probability curve, and extracting parameters; s3, constructing a mapping model of the U% with respect to the gap length and a mapping model of the dispersion parameter t with respect to the gap length; s4, solving a breakdown risk rate; and S5, establishing a statistical insulation cooperation model, and determining a design interval of the air gap. According to the invention, research is carried out based on the probability distribution of the actually measured oscillation attenuation impulse voltage, the breakdown risk rate calculation is more in line with the actual operation condition of the transformer substation, and the problem of design deviation caused by dependence on standard double-exponential waves in the existing method is solved.

The application provides a multi-cavity cable material aging and electrical property in-situ measurement device and method, which comprises a box, a plurality of cavities and a communication area are arranged in the box, and each cavity is independent of each other; a humidity sensor and a temperature sensor are arranged above each cavity; an independent temperature control unit is arranged in each cavity; the communication area is communicated with each cavity respectively, a pressure controller is arranged in the communication area, the pressure controller is connected with each cavity through a pipeline; a humidity controller is further arranged in the communication area, and the humidity controller is used for controlling the humidity in each cavity; an electric current test end, a semi-conductive volume resistivity test end and a breakdown voltage test end are arranged in each cavity respectively; a control device is arranged on the box, and the control device is electrically connected with each sensor and controller. The application can realize the synchronous aging and in-situ measurement test of multiple chambers under the same air pressure and humidity.

The present application belongs to the technical field of vehicle fault prediction, and particularly relates to a new energy vehicle high-voltage cable insulation fault prediction method and system, which comprises the following steps: obtaining a voltage time sequence of a high-voltage bus and a temperature sequence corresponding to the surface of a high-voltage cable synchronously collected; performing nonlinear mapping amplification on the collected overvoltage absolute amplitude; extracting signal local extreme points and performing stress closed loop matching according to material fatigue memory characteristics, and dividing the stress amplitude into multiple discrete stress grade intervals; calculating the insulation cumulative total damage degree after the end of the current calculation period, converting the insulation cumulative total damage degree into an insulation health state retention rate index facing a vehicle controller, and issuing a bottom layer hardware maintenance instruction when the retention rate index decreases to a set safety intervention threshold. The present application can capture transient characteristics and fuse multiple field coupling factors, and realize high-precision pre-prediction of the micro-deterioration process of insulation materials.

The utility model provides a kind of multifunctional electrode and oil oxidation test system for oil oxidation test, multifunctional electrode includes main body frame, electrode plate, metal coil, wiring terminal and mounting component;Main body frame includes upper and lower end cap and multiple posts, and form internal cavity among the three;Wiring terminal includes two first wiring terminal, two second wiring terminal and multiple third wiring terminal;Two first wiring terminal is fixed with the two metal plate of electrode plate;Two second wiring terminal is connected with metal coil;Third wiring terminal connects electronic component;Mounting component is located in internal cavity.The multifunctional electrode in the utility model simulates the oil service condition of complex scene to a large extent, realizes the oxidation and decay test of oil under the coupling effect of multiple physical fields such as electricity, magnetism, heat, oxygen, metal, also realizes the synchronous monitoring of material compatibility, electronic component and oil compatibility, corrosion and electrical performance in oil oxidation process.

The present application relates to the technical fields of electromagnetic variable measurement and analysis, and discloses a method and system for testing the stability of an emulsion explosive oil film. The method comprises: placing an emulsion explosive sample between a first electrode and a second electrode in a test container to obtain a target oil film, and forming an electrical contact for the target oil film; applying an alternating voltage signal to the first electrode and the second electrode to generate a polarization response; collecting dynamic response data of complex impedance with respect to an excitation frequency to obtain an impedance response data set; decoupling a virtual part capacitance component of the target oil film from the impedance response data set, and constructing a virtual part capacitance frequency response map with the change in the excitation frequency as the horizontal axis and the virtual part capacitance component as the vertical axis; identifying a relaxation peak feature of the virtual part capacitance frequency response map to obtain an interface relaxation characteristic value; and comparing the interface relaxation characteristic value with a preset standard characteristic value to determine the stability of the target oil film. The present application can improve the efficiency of testing the stability of an emulsion explosive oil film.

While existing inspection devices can detect the presence of fully penetrating defects such as pinholes, they struggle to detect defects where the metal wire is not exposed. To address this issue, an electrode (8) is provided, which is impregnated with a conductive liquid (7) and formed to make contact with the periphery of the insulating layer of the electromagnetic wire (2). Defects in the insulating coating are detected by measuring the amount of discharge charge generated by the partial discharge between the electromagnetic wire (2) and the conductive liquid (7).

This invention relates to the field of high-voltage insulation and intelligent sensing monitoring in power systems, specifically to a rapid synchronous detection device and method for multiple parameters of insulating oil. The device comprises a fluid drive unit, an acoustic-electrical stratification test pipeline, a breakdown test unit, and a self-healing damping valve. The system utilizes the synergistic effect of ultrasonic standing wave field and dielectric electrophoresis to construct a virtual stratified structure within the pipeline, consisting of a central gas-rich core flow and a peripheral pure circulation flow. Its core component is a hollow, breathable fiber membrane tube for degassing analysis, while simultaneously using an external shielded electrode to measure the dielectric loss of the bubble-free oil. This invention resolves the fluid dynamics contradiction between the highly disturbed fluid environment required for oil-gas separation and the undisturbed steady-state laminar flow environment required for dielectric loss measurement, thus achieving rapid synchronous detection of multiple parameters of insulating oil.