152results about "Material breakdown voltage" patented technology

The invention discloses a laboratory instrument data automatic acquisition and analysis method and system, and relates to the technical field of laboratory instrument acquisition and analysis, and the method comprises the steps: obtaining sample identification information, automatically sorting and distributing the sample identification information to different analyzers, uploading detection data to a central database in real time, and associating a sample number, a detection timestamp and an instrument number; the method comprises the following steps: constructing a multi-dimensional feature space based on historical detection data, performing sub-cluster division by adopting a density clustering algorithm, establishing a cross-index logic constraint relationship in combination with an expert rule base, mapping real-time detection data to the multi-dimensional feature space, judging a data exception type according to sub-cluster affiliation and the logic constraint relationship, and when judging that the data is exceptional, judging that the data is abnormal. And triggering a secondary detection process, automatically dispatching a mechanical arm to send the sample back to a specified instrument to execute differentiated reinspection operation, and generating a comprehensive report containing detection process tracing. According to the invention, the automation level of detection is improved, the labor cost is reduced, the detection quality and efficiency are improved, and the laboratory detection work efficiency is improved.

A variety of methods, apparatuses, and systems are disclosed, involving, in one example, a method including traversing the length of a conductive substrate with a holiday detector, inducing an arc voltage at a defect of a coating disposed on the conductive substrate, detecting the arc voltage with sensors, and recording an electrode voltage with electronics disposed at the holiday detector.

The invention relates to a continuous production process of a wrapping preforming and squaring integrated film-covered wire, and belongs to the technical field of composite material forming. Comprising a pay-off machine, a coating machine, a squaring machine, a first lead assembly, a first pressing assembly and a curing assembly, and the production process comprises the following steps that S10, raw materials are paid off; step S20, coating with an adhesive tape; step S30, carrying out pre-pressing treatment; and S40, winding output and wire rod squaring treatment are carried out. The technical problems that in the prior art, wire rods need to be wound and output through a wire winding machine between the wire rod coating process and the die pressing process, multiple times of wire arrangement are needed, production is not continuous enough, and consequently the production efficiency is reduced are solved.

The invention belongs to the field of battery short circuit detection, relates to a data analysis technology, and aims to solve the problem that a short circuit detection result cannot be verified in combination with risk analysis in the prior art, in particular to a lithium battery short circuit diagnosis detection method and system. The diagnosis detection platform is in communication connection with a short circuit detection module, a risk assessment module, a factor checking module, an optimization analysis module and a storage module; the short-circuit detection module is used for performing short-circuit detection analysis on the lithium battery: generating a detection period, dividing the detection period into a plurality of detection time periods, marking the lithium battery as a detection object, and marking the detection time periods as short-circuit normal time periods or short-circuit abnormal time periods through a short-circuit coefficient DL; according to the invention, short-circuit detection analysis can be carried out on the lithium battery, the operation parameters of the lithium battery in each detection time period are collected and calculated to obtain the short-circuit coefficient, the short-circuit probability of the lithium battery is fed back through the short-circuit coefficient, and then differential marking is carried out on the detection time periods.

The invention discloses an electric spark nondestructive testing evaluation method for the integrity of a waterproof layer of a cable trench, and belongs to the technical field of nondestructive testing, and the method comprises the following steps: applying a multi-frequency electric signal through a preset moving electrode; the initial contact pressure of the moving electrode and the surface of the waterproof layer is obtained in real time, the pressure of the contact position of the moving electrode is adjusted, an electric spark signal generated at the defect position of the cable trench waterproof layer by a multi-frequency electric signal applied by the moving electrode is captured, and characteristic parameters of the electric spark signal are extracted to generate current electric spark characteristic data; utilizing the current electric spark characteristic data to distinguish defect types so as to generate a defect evaluation result; and outputting defect distribution information and triggering an acousto-optic alarm according to a defect evaluation result. According to the method, a detection mode of combining multi-frequency electric signal excitation and electric spark signal feature extraction and analysis is adopted, waterproof layer defect types can be distinguished, the severity of the waterproof layer defects can be evaluated, and the detection accuracy is improved.

The invention discloses a method for calculating static pressure generated by arc discharge in a transformer oil tank, and the method comprises the steps: obtaining an expansion coefficient c of the transformer oil tank; electric arc time-varying power P (t) and energy W (t) of electric arc discharge in the transformer oil tank are obtained through calculation; the arc discharge product temperature T of arc discharge in the transformer oil tank is obtained; a gas space V0 existing in the transformer oil tank is measured, and the amount Vg of gas dissolved in oil is calculated according to the solubility kh of characteristic gas generated by the electric arc in the oil; and calculating static pressure p generated by arc discharge in the transformer oil tank according to a static pressure calculation formula.

The invention discloses a cable accessory interface breakdown voltage testing device and method. 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 invention, the interface breakdown voltage of the cable accessory can be detected quickly, economically, effectively and accurately.

The invention discloses a visual quantitative measurement and analysis device and method for detecting the surface discharge degree of an insulating material, and relates to the field of visual quantitative detection of the surface discharge degree of the insulating material. By constructing an electrostatic discharge system, the pulse discharge process of the insulating surface under the actual operation condition is simulated, and then the surface of the insulating material is induced to discharge. A visual processing device is built, through the polarization effect between dust and charges, the surface charge distribution condition is rapidly reproduced through the dust, and equipment recording is shot. A gray-scale map working principle is applied, a gray-scale conversion and binarization processing program is written, the program is started to convert a recorded picture into a binary image only containing black and white pixel points, the number of the pixel points is counted, and the charge distribution density in an effective discharge radius is calculated through formula conversion, so that the electrostatic discharge degree is quantitatively represented. By changing environmental conditions such as humidity and air pressure, service life state evaluation of the insulation equipment and insulation detection and structure optimization work of the novel insulation equipment in a complex environment are researched.

The invention relates to the technical field of electrical performance testing, and discloses a multi-class nonferrous metal breakdown voltage testing device, system and method. The testing device comprises a testing groove provided with a plurality of independent clamping grooves, a temperature and humidity regulation and control system, an electrode module, a power module and a data acquisition module, and high-precision breakdown voltage testing of multiple samples in a constant environment is achieved through multi-channel synchronous testing, temperature and liquid level dynamic control, symmetrical electrode layout and high-speed data acquisition. The system is integrated with a central control unit, the boosting rate is automatically set according to sample parameters, multiple channels independently boost and synchronously collect breakdown data, and a double-threshold algorithm is adopted to judge breakdown events in real time. The method comprises the whole process of solution preparation, sample installation, electric field optimization, boost control and data judgment. Compared with the prior art, the testing efficiency and the measuring precision are improved, the environmental interference is reduced, and the method is suitable for batch detection and quality control of tantalum, niobium and oxide materials of the tantalum, the niobium and the oxide materials of the tantalum and the niobium.

The invention discloses an automatic oil injection device and method for insulating oil breakdown voltage detection, and relates to the technical field of insulating oil detection.The automatic oil injection device comprises an oil injection assembly, a breakdown voltage detection assembly, a temperature measurement and control module and an automatic oil injection module, and the oil injection assembly comprises an oil injection module, an oil cup and an insulating oil liquid level control module; the breakdown voltage detection assembly comprises a to-be-detected oil sample volumetric flask, a filtering module, a first peristaltic pump and a breakdown voltage tester; the temperature measurement and control assembly comprises an oil temperature measurement module and a temperature control module; according to the invention, the traditional manual removal time is shortened, the injector is not easy to damage, the risk of cutting a detector is also avoided, and dangerous factors are reduced in the detection process.

The invention discloses a method and system for calculating the average temperature of arc discharge products in a transformer oil tank, and the method comprises the steps: carrying out an arc discharge experiment in a sealed oil-filled tank body of transformer oil, and measuring the arc discharge voltage, current and pressure waveform, the volume of the arc discharge products at room temperature, and the corresponding pressure in the oil tank; the time-varying temperature T (t) of the discharge product during arcing is obtained by calculating the discharge static pressure pL (t) obtained by measurement; calculating the temperature of a discharge product after arc quenching; and obtaining an average temperature change curve of the discharge product at different time stages based on the time-varying temperature of the discharge product during arcing and the average temperature of the discharge product after arc quenching.

The invention provides a test system and method for simulating in-situ reservoir electric detonation fracturing through gas-liquid coupling pressure application. The test system comprises a pressure chamber used for installing a test piece, a stress loading device, a gas-liquid coupling device and a high-voltage electric detonation fracturing device with a discharge electrode. A detonation hole is formed in the top of the test piece; the stress loading device is connected with the pressure chamber and is used for applying axial pressure and confining pressure to the test piece in the pressure chamber to simulate ground stress; the gas-liquid coupling device can inject water, gas, water and gas into the pressure chamber; and a discharge electrode of the high-voltage electric detonation cracking device can be arranged in a detonation hole of the test piece to crack the test piece. The device has the characteristic of being capable of applying axial pressure and confining pressure, controllable explosion energy can be achieved, coupling of multiple physical fields and high accuracy of energy output are guaranteed, and self-water injection, self-gas injection and up-down water pumping and draining are achieved through the gas-liquid coupling device; and accurate and in-depth research on the hole fracture development law, gas migration, permeability and the like after the in-situ reservoir high-voltage electric pulse technology is realized is facilitated.

The utility model discloses a Teflon pipe rapid electric spark detection device, and relates to the Teflon pipe technology field, the Teflon pipe rapid electric spark detection device comprises a base plate, protection shells, and feeding ports, the protection shells are fixedly connected to the top of the base plate, and the feeding ports are arranged on two sides of the two protection shells; the teflon pipe rapid electric spark detection device comprises a bottom plate, the middle of the top of the bottom plate is provided with a detection structure, the detection structure is provided with a fixing ring, the fixing ring is fixedly connected to the top of the bottom plate, and one end of the fixing ring is hinged to a rotating ring. The electric spark detection equipment can generate electromagnetic radiation during high-voltage working, electromagnetic shielding can protect operators from being damaged by the electromagnetic radiation, meanwhile, external electromagnetic interference is prevented from damaging electronic elements of the equipment, electromagnetic interference sources in an industrial field environment are more, the electromagnetic shielding provides a relatively clean electromagnetic environment, and the electromagnetic shielding can be used for protecting the operators from being damaged by the electromagnetic radiation. And stable operation of equipment is ensured.

The invention relates to the technical field of production and detection of high-insulation magnesium oxide powder, in particular to a production and detection method and system of high-insulation magnesium oxide powder, which are used for solving the problems that multiple performance indexes are difficult to cooperatively detect and the regulation and control response of process parameters is lagged. Key performance indexes such as particle uniformity, insulating strength and material density are collected in real time through a sensor array, and operation state information is constructed. And calculating a priority coefficient of each index based on a dynamic weight distribution algorithm, wherein the priority coefficient is used for dividing production line detection segments. And constructing a time sequence model for each segment, introducing an ARIMA method to predict a performance trend, and generating a deviation evaluation index in combination with an ideal process curve. And identifying a performance abnormal region according to an evaluation result, constructing a PID closed-loop control mechanism based on a dominant index, adjusting key process parameters in real time, and realizing dynamic optimization regulation and control on the target segmented region.

The utility model relates to a glass-lined pressure vessel inspection device which comprises a telescopic rod and a multifunctional detection unit, one end of the telescopic rod is a detection end, and the other end of the telescopic rod is a handheld end; the multifunctional detection unit is fixed on the two sides of the detection end of the telescopic rod and comprises a glass lining coating thickness meter, an oxygen and explosion meter and a direct-current high-voltage detection probe rod electric brush; one side of the detection end is provided with the direct-current high-voltage detection feeler lever electric brush, and the other side of the detection end is provided with a glass lining coating thickness meter and an oxygen and explosion measuring instrument. Compared with the prior art, the device can detect various problems at the same time, improves the detection efficiency, and is simple in structure and convenient to carry.

The invention discloses a defect detection device and method for nitride ceramic substrates, and relates to the technical field of detection devices.The defect detection device comprises a workbench, three substrate placement assemblies are arranged on the upper end face of the workbench, a transfer plate is arranged on the workbench, a mounting plate is movably arranged on the workbench, and an air cylinder is fixed to one side of the mounting plate; a first connecting plate is fixed to the tail end of the telescopic end of the air cylinder, a first feeding adsorption assembly and a first discharging adsorption assembly are symmetrically arranged on the lower end face of the first connecting plate, two detection assemblies are arranged on the workbench, a multi-axis mechanical arm is further arranged on the workbench, and a steering motor is fixed to the tail end of the multi-axis mechanical arm. A carrying electric push rod is fixedly arranged at the working end of the steering motor, a second connecting plate is fixed to the tail end of the telescopic end of the carrying electric push rod, and a second feeding adsorption assembly and a second discharging adsorption assembly are symmetrically arranged on the lower end face of the second connecting plate. When the device is used, feeding and discharging of the ceramic substrate body are facilitated, and therefore the detection efficiency of the detection method is high.

The present invention provides a true triaxial loading mechanism for simulating the dynamics of ultra-deep drilling cores, comprising a reaction loading frame, a first principal stress loading assembly, a second principal stress loading assembly and a third principal stress loading assembly, wherein a high-pressure fluid loading chamber extending along the third principal stress direction is constructed inside the reaction loading frame, and a core sample is arranged in the high-pressure fluid loading chamber, wherein the first principal stress loading assembly, the second principal stress loading assembly and the third principal stress loading assembly provide principal stress loading for the core sample in three principal stress directions, and the third principal stress loading assembly is integrated in the reaction loading frame, and the third principal stress loading assembly blocks the high-pressure fluid loading chamber, so that the high-pressure fluid loading chamber is formed into an ultra-high pressure chamber. The present invention can simulate the dynamic true triaxial loading conditions of ultra-deep drilling cores in deep geological environments during the true triaxial loading process of the core sample, so as to obtain stress-strain information of the dynamic disturbance full destruction process.

The invention belongs to the technical field of generator stator coil materials, and particularly relates to a method and a system for evaluating aging resistance of a generator stator coil in a high-altitude environment. The method is based on research on service characteristics and evolution laws of a generator stator coil in a high-altitude environment; the aging resistance of the generator stator coil is evaluated through the following indexes for the first time: testing the breakdown voltage of the stator coil, the concentration of volatile organic compounds detected under the thermo-oxidative aging condition, the heat conductivity coefficient, the specific surface area of solid substances, the porosity and the liquid adsorption performance. The evaluation method provided by the invention has the advantages of accuracy and rapidness, and has a good application prospect.

The invention relates to an arc contact multi-factor coupling test device and method and a service performance evaluation method, and the arc contact multi-factor coupling test device comprises a multi-environment coupling test box body which simulates the use environment of an arc contact; the contact arc extinguishing test platform is arranged in the multi-environment coupling test box body and is used for fixing the arc contact so as to simulate the large-current arc breaking process of the contact; the electrical parameter control system is arranged on one side or multiple sides of the multi-environment coupling test box body and used for controlling electrical parameters in the test process; and the control and data acquisition module is respectively connected with the multi-environment coupling test box body, the contact arc extinguishing test platform and the electrical parameter control system and is used for setting test parameters and acquiring test data. According to the test equipment, an electric, thermal, mechanical and environmental multi-field coupling technology is adopted, a highly-simulated test platform is constructed, and the operation state of the contact under the actual working condition can be comprehensively and accurately evaluated.

The invention provides a multifunctional electrode for an oil oxidation test, and an oil oxidation test system and method. The multifunctional electrode comprises a main body frame, an electrode plate, a metal coil, a wiring terminal and a mounting assembly, the main body frame comprises an upper end cover, a lower end cover and a plurality of stand columns, and an internal cavity is formed among the three; the wiring terminals comprise two first wiring terminals, two second wiring terminals and a plurality of third wiring terminals; the two first wiring terminals are fixed with the two metal plates of the electrode plate; the two second wiring terminals are connected with the metal coil; the third wiring terminal is connected with an electronic component; the mounting assembly is located in the internal cavity. The multifunctional electrode provided by the invention simulates the oil service condition in a complex scene to a great extent, realizes the oxidation decay test of oil under the coupling action of multiple physical fields such as electricity, magnetism, heat, oxygen and metal, and also realizes the synchronous monitoring of material compatibility, compatibility of electronic components and oil, corrosion and electrical performance in the oil oxidation process.

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.

The invention discloses a compatibility evaluation method and device of a transformer structure material and an insulating liquid, electronic equipment and a storage medium, and belongs to the technical field of electrical insulation detection.The method comprises the steps that compatibility evaluation indexes of the transformer structure material and the insulating liquid are obtained; index characteristics corresponding to the compatibility evaluation indexes are calculated; wherein the index characteristics comprise trend intensity, fluctuation characteristics and mutation characteristics; according to the index characteristics, calculating a weight coefficient corresponding to each compatibility evaluation index, according to the index value of each compatibility evaluation index and the corresponding weight coefficient, calculating a compatibility comprehensive score of the transformer structure material and the insulating liquid, and then according to the compatibility comprehensive score, determining the compatibility of the transformer structure material and the insulating liquid. Therefore, by implementing the method, the problem that the compatibility of the transformer structure material and the insulating liquid cannot be evaluated in the prior art can be solved.

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.

The invention discloses an insulator impact breakdown voltage measurement system and method, and belongs to the field of electrical measurement. The system comprises an upper computer, a plurality of cameras, a high-voltage power supply and an insulator testing device, the insulator testing device comprises a closed cavity, a disc platform used for placing a plurality of insulators to be tested, a high-voltage electrode and an ionic wind module. The upper computer is used for controlling the ion wind module according to preset ion current parameters after the closed cavity is filled with the insulating gas, so that the ion wind module releases positive and negative ion current; the upper computer is also used for controlling the high-voltage power supply to supply power to the high-voltage electrode which forms a measuring loop with each insulator to be measured, so that the high-voltage electrode applies impact breakdown voltage to each insulator to be measured; and the upper computer is also used for obtaining an impact breakdown voltage measurement result of the insulator to be tested according to the number of the discharge channels corresponding to the discharge images of the cameras around the insulator testing device. According to the invention, the efficiency and accuracy of insulator impact breakdown voltage measurement are improved.

The utility model discloses an electric spark tetrafluoro material detection device, relates to electric spark detection field, including base and top plate, the bottom of base is provided with drive assembly, and the output end of drive assembly is provided with the sliding plate, the sliding plate is symmetrically provided with the clamping plate in sliding mode, the inside of clamping plate is rotatingly provided with the placing plate, the placing plate is provided with the clamping plate. A clamping plate is arranged on the base, a containing groove is formed in the clamping plate, a clamping sleeve is arranged on the clamping plate, an inserting rod is connected to the inner side of the clamping sleeve, a toothed rod is arranged in an interlayer of the clamping plate in a sliding mode, and an inserting hole matched with the inserting rod is formed in the toothed rod. The PTFE material is driven to slide upwards under the action of the air cylinder, the clamping plates clamp the two ends of the PTFE material in the process, and then the toothed bar is driven to slide downwards under the action of the insertion rod and the insertion hole, so that the bottom end of the PTFE material is completely exposed at the top of the detection assembly; and in the process, the PTFE material is quickly clamped.

The application discloses a lightning stroke event online guided wave monitoring method and device for a composite material structure, and comprises the following steps: arranging a plurality of piezoelectric sheets in a composite material structure to be monitored to form a sparse piezoelectric array; when the outer surface of the composite material structure to be monitored is struck by lightning, lightning impact force guided wave response mechanical quantities are excited, and the generated mechanical quantities are conducted to the piezoelectric sheets; the lightning impact force guided wave response mechanical quantities are converted into lightning impact force guided wave response signals; the lightning impact force guided wave response signals are transmitted to a data acquisition module through an online sensing mode; the lightning impact force guided wave response signals are subjected to direct current component removal and filtering pretreatment; and through a lightning impact force guided wave response signal imaging monitoring mode of the sparse piezoelectric array, lightning attachment point impact force passive imaging results are constructed. The lightning stroke event online guided wave monitoring method and device can not only improve the quality of lightning piezoelectric guided wave response signals, but also can perform high-precision positioning and imaging on lightning attachment points.

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 discloses a monopole wire ion flow field altitude correction method, device and equipment, and relates to the field of direct current transmission, and the method comprises the steps: obtaining the structure parameters and altitudes of a reference wire and a target wire; determining corona onset voltages at the two altitudes, and calculating synthetic electric field intensity of different corona discharge degree factors at the first altitude and nominal electric fields at the moment of corona onset at the two altitudes; according to the corona onset voltage at the second altitude and the applied voltage, determining a corona discharge degree factor at the second altitude; and according to the corona onset voltages at the two altitudes, the nominal electric field at the moment of corona onset at the two altitudes, the synthetic electric field intensity of different corona discharge degree factors at the first altitude and the corona discharge degree factor at the second altitude, determining the synthetic electric field intensity at the second altitude so as to correct the altitude of the ion flow field. The calculation efficiency of the synthetic electric field intensity at different altitudes is improved, and the method is suitable for all electrode structures of a monopole wire.

A method of forming an integrated circuit on a substrate is described herein. The method includes forming a first doped region of a detection structure on the substrate, the first doped region comprises a first doped conductivity type. The method forming a capacitor of the detection structure, which includes forming a second doped region of a second conductivity type opposite the first doped conductivity type, the second doped region surrounded by the first doped region. The second doped well comprises a top surface area smaller than a top surface area of the first doped region. The method includes performing parametric testing on the capacitor over a plurality of breakdown voltages. The method includes determining the gate oxide integrity of the capacitor based on the parametric testing over the plurality of breakdown voltages.