203 results about "Temperature cycling" patented technology

The invention discloses an H-bridge key equipment service life and system reliability evaluation method and system for a cascade network construction type energy storage system, and belongs to the technical field of power system automation. The method comprises the following steps: firstly, extracting task profile parameters under multiple time scales, and constructing a time sequence feature model; secondly, estimating a hot spot temperature sequence of the IGBT device and the capacitor based on a multilayer feedforward neural network; then, in combination with a continuous extreme point paired temperature cycle extraction method and a Miner linear cumulative damage criterion, the damage factor and the residual life of the device are evaluated; then, task profile samples are expanded based on a generative adversarial network with gradient penalty, and life distribution and reliability indexes of key devices under different profiles are calculated; and finally, based on H-bridge series structure mapping device level information, constructing a system level reliability model, obtaining system failure rate, average fault-free operation time and a reliability function, and realizing health state perception and reliability quantitative evaluation of the energy storage system.

The invention discloses a fast steering mirror position precision real-time calibration system and method. According to the system, a temperature sensor is arranged on each motor of the fast reflecting mirror, the detection temperature of each motor of the fast reflecting mirror is measured in real time through the temperature sensors, a temperature cycle test is carried out in combination with a high-low temperature box and a theodolite, and the calibration temperature is calculated based on the detection temperature of each motor through a processing assembly; generating a calibration model according to the calibration temperature and the position of the fast steering mirror obtained by multiple tests; and finally, the position precision of the fast steering mirror is calibrated through the calibration temperature and the calibration model which are acquired in real time. Real-time detection and calibration can be realized, and errors can be further eliminated, so that the real-time performance is improved, and the position precision of the fast reflecting mirror is improved. The technical problems that the real-time performance is poor, and the position precision of the fast steering mirror is not high are solved.

The invention relates to the technical field of filter film testing, and discloses filter film thermal deformation testing equipment and a testing method. The method comprises the following steps: based on a test environment, carrying out a temperature cycle test on the filter film, and collecting a triple data set at the same time; performing image preprocessing and displacement field construction on the triple data set, and decomposing a displacement field into a linear combination of a standard deformation mode to obtain a thermal deformation response function; constructing a hierarchical probability graph model based on a thermal deformation response function, and extracting thermal deformation feature structural representation through variational inference; and performing deviation compensation on the structural representation of the thermal deformation characteristics to obtain environment self-adaptive thermal deformation characteristics, and calculating a thermal deformation reliability evaluation result comprising a thermal expansion coefficient matrix, a thermal deformation anisotropy index and thermal ripple strength. And comprehensive evaluation and reliability analysis of the thermal deformation characteristic of the filter film are realized.

The invention relates to a printed circuit board welding spot temperature cycle acceleration test profile design method, which takes welding spots on an aging test board carrying a test device as research objects, and utilizes simulation software to carry out finite element simulation on a target circuit board under multiple groups of temperature cycle stress conditions. A plurality of groups of fatigue life are calculated through an Engelmaier fatigue life model in combination with a simulation result, the fatigue life obtained through calculation is substituted into a Coffin-Manson acceleration model for fitting calculation of an acceleration factor calculation formula, finally, the acceleration factor calculation formula is utilized, required acceleration time is substituted into the formula for calculation to obtain actual condition design acceleration test section parameters, and the acceleration test section parameters are calculated according to the actual condition design acceleration test section parameters. The obtained acceleration test profile can complete the temperature cycle acceleration test of the printed circuit board within a given time, and the process of the method is as shown in Figure 8. The method belongs to the technical field of reliability evaluation of microelectronics and components.

The invention relates to a preparation, regulation and control method of a thermoplastic elastomer encapsulating material in the technical field of new materials, which comprises the following steps: realizing an in-situ reaction process by controlling the concentration and reaction temperature of reactive functional groups in the encapsulating material according to an interface reaction rate constant and active group distribution density; if the reaction conversion rate reaches a preset value, a chemically bonded interface bonding layer is formed; monitoring the stress distribution state in the rubber coating layer by adopting a stress analysis algorithm, and when detecting that local stress concentration exceeds the yield strength of the material, dispersing a stress concentration area by adjusting the length of a flexible chain segment and the density of a rigid cross-linking point in a cross-linking network; and deformation data and a bonding strength change trend of the interface bonding layer in the temperature cycling process are obtained, if the bonding strength attenuation rate exceeds a preset threshold value, a dynamic cross-linking mechanism is activated, and the dynamic equilibrium state of interface bonding is maintained through fracture and recombination of a reversible covalent bond.

The invention provides a preparation method and application of ceramic slurry for high-temperature bonding of aluminum nitride ceramics, and relates to the technical field of high-temperature ceramic materials.The preparation method comprises the following steps that firstly, an organic carrier is prepared, a polymer binder, an organic solvent, a plasticizer and a dispersing agent are weighed according to the weight ratio and stirred at the temperature of 60-70 DEG C till complete dissolution and clarification are achieved for use; 2, an inorganic functional phase is prepared, aluminum nitride powder, yttrium oxide powder and alkaline earth metal oxide powder are weighed according to the weight proportion and placed in a ball milling tank to be evenly mixed, the obtained ceramic slurry serves as a bonding layer, the tolerable temperature can reach 1000 DEG C or above and is far higher than that of metal brazing filler metal, and the ceramic slurry is suitable for severe environments such as aerospace and high-temperature sensors. The main components of the bonding layer are consistent with the base material, and the thermal expansion coefficient is highly matched, so that the thermal stress can be greatly relieved, and the failure of the device caused by thermal fatigue in the temperature cycle is avoided.

The invention provides a photovoltaic power station full power hour deviation prediction method, which belongs to the technical field of photovoltaic power stations, and comprises the following steps: establishing a component nonlinear attenuation model by collecting multi-physical field environmental parameters, identifying temperature cycle and freeze-thaw cycle, and calculating an acceleration factor and a damage index; an attenuation compensation coefficient is introduced according to attenuation rate deviation to correct component power, a total-station subarray topology network model is constructed, a maximum-flow minimum-cut algorithm is applied to identify a power transmission bottleneck, and direct-current side voltage and reactive compensation configuration are optimized to balance power flow between subarrays; a space-time diagram convolutional network and a gating circulation unit are used for extracting space topological characteristics and a time sequence evolution rule, a prediction result is corrected by applying a hysteresis compensation coefficient according to irradiance change characteristics, and the technical problem that the prediction accuracy of the full power generation hours of the photovoltaic power station is insufficient is solved.

The invention discloses an integrated circuit temperature cycle experiment and test data processing method, and the method comprises the steps: carrying out the processing of the data obtained through the temperature cycle experiment and test of a target integrated circuit, and enabling an obtained target test result to reflect the performance of the target integrated circuit under different temperatures and different temperature changes. The method can be used for guiding the further improvement of the design of the target integrated circuit. Besides, in the process of obtaining the target test result, the failure rate of the target integrated circuit obtained through the detection means is compared with the failure rate obtained through the calculation means, so that whether the performance of the target integrated circuit is thoroughly mined or not and whether the robustness is completely utilized or not are determined; and conditions are provided for fully knowing the performance of the integrated circuit and subsequent design improvement.

The invention discloses an automatic testing and screening method for electronic components, which relates to the technical field of electronic engineering and microelectronics and comprises the following steps: generating a multi-dimensional stress field through a temperature control module, a humidity control module and an electromagnetic interference simulation module; calling a preset extreme working condition combination sequence based on the target application scene of the component; under a dynamic coupling environment, dominant parameters and recessive parameters including a dielectric relaxation spectrum, a carrier mobility transient response and a thermoacoustic emission signal are synchronously collected; inputting the hidden parameter time sequence data into physical failure models including an electrochemical corrosion model and a thermal mechanical fatigue model; dynamically adjusting the passing threshold of the test item according to the model output; the step of applying accelerated degradation excitation to the screened component comprises the following steps of: circulating a set temperature for a set number of times; applying a bias voltage-temperature stress; and repeating the step S2 to monitor the implicit parameter drift amount, and eliminating the device with out-of-tolerance drift. The device guarantee is provided for the fields of new energy automobiles, aerospace electronics and the like.

The invention provides a temperature cycle endurance test method, device and equipment and a storage medium, relates to the technical field of vehicles, and is used for accurately calculating the temperature cycle number of a motor controller. The method comprises the following steps: acquiring cooling liquid temperature-time data of motor controllers of a plurality of vehicles; based on the cooling liquid temperature-time data of the motor controller of each vehicle, determining temperature difference-cycle number data of the motor controller of each vehicle; based on the temperature difference-cycle number data of the motor controller of each vehicle, the equivalent temperature cycle number corresponding to each vehicle in the temperature cycle endurance test is determined; determining a target temperature cycle index in the temperature cycle endurance test based on the equivalent temperature cycle index corresponding to each of the plurality of vehicles; and performing a temperature cycle endurance test on the test vehicle based on the target temperature cycle number.

According to embodiments, a modified freeze-drying apparatus and methods of use are provided herein for providing variable power heating for precise control of material temperatures during freeze-drying. The apparatus may provide a vacuum pump and variable current heater trays for receiving the material, freezing the material, creating a vacuum, progressively increasing the heater tray temperature without causing temperature cycling, deactivating the tray heater, repressurizing the apparatus, and removing the freeze-dried material.

The invention discloses an intelligent assembling method of a glass reference mirror, which utilizes an intelligent mechanical arm to complete the assembling of the glass reference mirror, utilizes a set of six-degree-of-freedom intelligent mechanical arm to complete the accurate position control of the glass reference mirror, and utilizes two sets of double-shaft photoelectric autocollimators to measure the orientation of the reference mirror. The position of the mechanical arm is adjusted through a central control closed-loop algorithm, and the glued surface of the reference mirror is aligned with the reference mirror mounting surface of the inertial attitude sensor, so that the reading of a reference collimator is the lowest, namely the precision is the highest, and the actual measurement precision can be within 15 seconds of arc. Meanwhile, by using the system, the thickness of the epoxy adhesive layer can be controlled through a known reference surface, and the temperature cycle of-35 DEG C to 70 DEG C can be resisted when the thickness of the adhesive film is 0.20 mm to 0.60 mm through test verification.

The invention relates to the technical field of structural reliability, in particular to a conformal antenna welding spot thermal vibration coupling fatigue life prediction method based on damage superposition, and the method comprises the steps: constructing a finite element model of a conformal antenna; obtaining a thermal damage value of a conformal antenna structure welding spot under a single temperature cycle; obtaining a vibration damage value of a conformal antenna structure welding spot under a single temperature cycle; obtaining a thermal vibration coupling damage value in a single cycle period; and obtaining the fatigue life of the conformal antenna welding spot under thermal vibration coupling. According to the method, the purpose of evaluating the fatigue life through thermal vibration damage time domain superposition is achieved, and meanwhile the fluctuation influence of vibration load randomness on the fatigue life evaluation result is fully considered.

The invention discloses a concrete cracking performance simulation test device under temperature circulation and an evaluation method, the device comprises a base, a heating part, a concrete test piece, two heat insulation partition plates, a radiation device, a heat insulation cover body and information acquisition equipment, and the heating part is fixed on the base; the concrete test piece is annular, the concrete test piece is placed on the base, and the concrete test piece and the heating component are distributed at intervals inside and outside; the space between the concrete test piece and the heating part is divided into two spaces through two heat insulation partition plates, and the radiation device is installed on the base and located in any space; the heat insulation cover body is placed at the tops of the two heat insulation partition plates and is positioned between the concrete test piece and the heating component; the information acquisition equipment is mounted on the base through a bracket and is aligned to the concrete test piece. The device can truly simulate the cracking conditions of the dark side and the sunny side of the concrete pier in the large-temperature-difference region, and can be used for rapidly evaluating the cracking performance of the concrete under the action of temperature circulation in the large-temperature-difference region indoors.

The invention relates to the field of intelligent sensors, and discloses a method for manufacturing a sensitive core of a six-dimensional pressure sensor of a robot based on glass micro-melting, which comprises the following steps of: calculating the deflection of a flat diaphragm corresponding to a glass micro-melting structure so as to analyze the structural strain characteristic of the sensitive core under the action of pressure; calculating the gas viscosity coefficient of the sensitive core body under the dynamic load condition, and calculating the pressed film damping amount of the sensitive core body; performing a temperature cycle test on the sensitive core, collecting thermal zero drift data in the test process, and analyzing the temperature drift stability of the sensitive core; carrying out calibration test on the sensitive core body to obtain non-linearity data, and evaluating the measurement precision of the sensitive core body; and performing optimization processing on the sensitive core body manufacturing process to obtain an optimization result. The manufacturing process stability of the sensitive core body of the six-dimensional pressure sensor of the robot can be improved.

The invention relates to the technical field of low-temperature environment simulation and material characteristic test, in particular to a high-speed rail traction system fault diagnosis method based on electromagnetic parameter fusion, which is used for solving the problems of material electromagnetic characteristic test distortion and fault diagnosis algorithm verification deficiency in a high and cold environment. The method comprises the following steps: constructing a multi-physical field coupling test environment, simulating temperature cycle and humidity sudden change working conditions from-50 DEG C to + 80 DEG C, and synchronously acquiring dynamic parameters of resistivity, dielectric loss and magnetic conductivity; according to the method, the limitation of a traditional static test is broken through, the real representation of the material performance degradation rule is realized, a closed-loop verification system of laboratory and field data is constructed, and the performance of the material is verified. The accuracy and environmental adaptability of fault diagnosis in a high and cold environment are remarkably improved, and reliable guarantee is provided for safe operation of a traction system under an extreme working condition.

The invention relates to the technical field of data storage, and discloses a high-low temperature intelligent start-stop test method for a solid state disk, which comprises the following steps: acquiring a to-be-tested solid state disk, and preprocessing the to-be-tested solid state disk; performing a high-temperature starting test on the preprocessed solid state disk to be tested, and evaluating according to a test result to obtain the high-temperature starting performance of the solid state disk to be tested; performing a low-temperature starting test on the preprocessed solid state disk to be tested, and evaluating according to a test result to obtain the low-temperature starting performance of the solid state disk to be tested; and setting a temperature circulation curve in the incubator based on the high-temperature starting performance and the low-temperature starting performance, performing high-low-temperature circulation starting and stopping testing on the processed solid state disk to be tested based on the temperature circulation curve, and monitoring and recording a current change waveform of each high-low-temperature circulation starting and stopping testing. According to the invention, the actual use scene of a user in an extreme environment is comprehensively simulated, and the accuracy and reliability of a test result are improved.

Thermal control devices and methods to provide improved control, speed and efficiency in temperature cycling are provided herein. Such thermal control device and methods can include one or more active elements, such a thermoelectric cooler device, that is controlled by an algorithm that regulates a temperature distribution of an adjacent reaction-vessel according to a temperature distribution command trajectory and estimated reaction-vessel temperature distribution. Some embodiments include two active elements that are bilaterally applied to opposing sides of the reaction-vessel. In some embodiments, the estimated reaction-vessel temperature is determined based on a state of power electronics of the element and a temperature output of one or more sensors of a portion of the element and / or an ambient environment of the reaction-vessel. Methods of calibration of such systems utilizing a thermal calibrator as a proxy for the reaction-vessel are also provided herein.

The invention belongs to the technical field of pipeline welding, and particularly discloses a welding prediction method and device suitable for a new energy natural gas pipeline. The method comprises the following steps: acquiring a load spectrum containing pressure fluctuation, temperature cycle and hydrogen partial pressure change; setting a target fatigue life threshold value; calculating a three-dimensional residual stress field through a thermal-mechanical coupling finite element model; the load spectrums are superposed, a critical plane method is combined with a Smith-Watson-Topper damage model to calculate the fatigue crack initiation life, and a hydrogen environment correction factor is introduced to quantify the hydrogen influence; with the standard reaching of the fatigue life as the constraint, welding parameters are optimized through an improved non-dominated sorting genetic algorithm; and outputting the optimal parameters to a welding system. According to the method, the problem that traditional welding parameter design lacks dynamic load and hydrogen environment coupling prediction capacity is solved, reverse design for reversely deducing process parameters from service requirements is achieved, and the reliability of welding quality and process formulation efficiency are remarkably improved.

A double-temperature-zone heat tracing device power stability test device disclosed by the present invention comprises a test box and a heat tracing band, the inner side of the test box is provided with a conveying mechanism, the conveying mechanism is provided with two loading plates capable of lifting and moving, and the tops of the two loading plates are symmetrically provided with overturning clamping assemblies. Correction assemblies are arranged on the two loading plates, each correction assembly comprises a plurality of fixing rings, the multiple fixing rings move in the length direction of the heat tracing band, correction sliding rings are arranged on the inner sides of the fixing rings, and cleaning assemblies used for cleaning the surfaces of the hot plate and the cold plate are arranged at the bottoms of the hot plate and the cold plate. According to the heat tracing band overturning device, efficient and uniform overturning of a soft heat tracing band is achieved, the temperature cycle period needed by pretreatment is remarkably shortened, the contact face of the hot plate and the cold plate is cleaned and maintained through the cleaning assembly, an oxide layer is effectively removed, and the stability of the heat conduction efficiency and the accuracy of a test result in the whole long-period test process of the heat tracing band are guaranteed.

The invention relates to a full-automatic temperature cycle test system, method and equipment for an insulator and a storage medium. The full-automatic temperature cycle test system comprises a partitioned test box body, an integrated temperature control unit, a sample bearing and transferring device and an intelligent control system. The test box body is provided with a high-temperature liquid soaking area, a low-temperature liquid soaking area and a high-temperature gas heating area, and accurate temperature field regulation and control are realized through the circulating water temperature control unit and the heating device; the sample bearing device is provided with a three-dimensional positioning mechanism and is driven by a servo system to automatically transfer in a temperature range; the control system is based on a touch screen and PLC architecture, and integrates the functions of parameter setting, flow execution, real-time monitoring and remote communication. According to the scheme, full-process automation of the insulator temperature test is realized, and the test efficiency and the data reliability are remarkably improved.

This invention discloses a through-silicon via (TSV) capable of suppressing copper extrusion and its fabrication method. The invention utilizes magnetron sputtering to deposit a certain thickness of ZrW at the bottom of the TSV. 2‑x Mo x After depositing an O8 thin film, followed by electroplating a copper layer of a certain thickness, the above steps are repeated to deposit multiple layers of ZrW in the middle of the Cu. 2‑x Mo x O8 thin film; while ZrW 2‑x Mo x O8 is a material with a negative coefficient of thermal expansion, which is -4.3 × 10⁻⁶. ‑6 to -7.7×10 ‑6 K ‑1 This material contracts rather than expands when heated. During heat treatment (e.g., annealing) or temperature cycling of through-silicon vias (TSVs), Cu expands, while ZrW... 2‑x Mo x The O8 material shrinks rather than expands, which can partially offset the thermally induced stress caused by the mismatch in the coefficients of thermal expansion between the constituent materials of the through-silicon via (TSV). Therefore, the TSV fabricated by the method of this invention can improve the reliability of copper-filled TSVs while allowing for optimized device performance (e.g., allowing for higher temperature annealing of copper).

To provide an Al bonding wire that exhibits excellent temperature cycling reliability and favorable bondability. The Al bonding wire contains 3.0 mass% or more and 10.0 mass% or less of Si, and an average diameter of a Si phase in a cross-section (L-section) in a central axis direction including a wire center axis of the Al alloy bonding wire is equal to or greater than 0.8 µm and equal to or less than 5.5 µm.

The invention belongs to the field of adhesive tapes, and particularly relates to a preparation method of an environment-friendly low-VOC (volatile organic compound) low-odor automobile low-voltage wire adhesive tape, which comprises the following steps: pretreatment of base lint, preparation of a middle layer, preparation of modified polyurethane and multi-layer gradient spraying forming. According to the present invention, the thermal expansion coefficient of the polyurethane coating is between the thermal expansion coefficient of the base layer flannelette and the thermal expansion coefficient of the polyurethane coating, such that the internal stress generated by the thermal expansion coefficient difference of the base layer flannelette and the polyurethane is effectively relieved, and the thermal expansion coefficient of the polyurethane coating is further reduced by adding the nanometer titanium dioxide in the polyurethane system; the thermal expansion coefficient of each layer of polyurethane is changed in a gradient mode, thermal stress concentration is further reduced, the bending fatigue life of the adhesive tape is greatly prolonged, due to the fact that internal stress is reduced, the adhesive tape is not prone to being damaged due to thermal stress concentration in the temperature cyclic change process, and the durability and reliability of the adhesive tape are greatly improved.

The application discloses an electronic product temperature cycle life test system based on data analysis and relates to the technical field of electronic product testing, solves the technical problem that the prior art cannot extract a harsh scene and integrate it into a temperature cycle scheme for temperature cycle test in combination with the use scene of an electronic product, and specifically relates to a use scene joint analysis unit which performs life test analysis on an electronic product in combination with the use scene of the electronic product, extracts a harsh scene and integrates it into a temperature cycle scheme for temperature cycle test, and tests the electronic product under a simulated use scene; a material failure analysis unit which performs material failure analysis on the electronic product; a material welding failure risk determination unit which determines the material welding failure risk of the electronic product and controls the material connection of the electronic product in a timely manner; and a micro deformation analysis unit which performs micro deformation analysis on the electronic product and ensures the usability of the connection of the overall material.

This invention relates to a thermal unit for temperature management of a dPCR thermal cycler, and also to a thermal unit for a device for simultaneously thermally cycling multiple biological samples, also known as temperature cycling, such a device itself, and a method for simultaneously thermally cycling multiple biological samples using such a device and thermal unit. The thermal unit has at least one heat block (3) and a cooling structure (2), the heat block (3) comprising at least one thermoelectric transducer (31) and a heat transfer plate (33) attached to the thermoelectric transducer (31) for dissipating heat energy from the thermoelectric transducer (31), and the cooling structure (2) comprising a radiator (21), at least one fan (221), and exhaust pipes (24a, 24b).

The invention discloses a computer part assembly aging test device, and relates to the technical field of aging test cabinets, and the device comprises an aging test cabinet body, one side of the aging test cabinet body is fixedly provided with a numerical control display screen through a hinge, and the interior of the numerical control display screen is rotatably provided with a control panel. Partition plates are fixedly connected in the aging test cabinet body at equal intervals, and the aging test cabinet further comprises a partition assembly arranged in the aging test cabinet body. Through the arrangement of a plurality of groups of support plates I and support plates II, to-be-tested computer parts can be separated, and a large number of to-be-tested computer parts are separated into a plurality of groups, so that the to-be-tested computer parts are prevented from being stacked together in a counter of the aging test cabinet, and when the to-be-tested computer parts are not stacked, the to-be-tested computer parts are not stacked. Air can smoothly circulate in the aging test cabinet body, and heat can be uniformly transmitted to the periphery of each to-be-tested computer part when aging test modes such as temperature circulation or high temperature and high humidity are adopted.

The application discloses a kind of low temperature extremely cold environment under optical fiber coating detection equipment and method, belong to coating detection technical field, comprising: obtaining temperature cycle times, coating thickness, heating gradient and other detection condition data, and coating adhesion, shrinkage, cracking length and other performance data;Construct detection condition evaluation model output detection condition coefficient;Based on detection condition, coating performance analysis model is established to output performance evaluation coefficient;Combined with the content of silicon dioxide nanoparticles and polyether polyurethane data, material analysis model is output material analysis coefficient;If the coefficient exceeds the preset threshold, then determine that the coating is unqualified and generate target formulation parameters.The application solves the technical problems of coating performance quantification evaluation and formulation precise optimization under extreme environment, significantly improves detection efficiency and reliability.

The invention provides a method and a system for testing the reliability of a built-in sensor for active defense of a converter transformer. The method comprises the following steps: performing a performance baseline test on the sensor; performing a sensor temperature cycle test, and checking the to-be-tested sensor and the sealing ring; the sensor is installed on the test tool, preset static pressure and preset high-temperature stress are applied to the sensor, the sensor to be tested is observed, and test signal response information of the sensor to be tested is detected; performing structural integrity detection on the sensor; and testing the equivalent height again to obtain the signal stability of the sensor. According to the invention, a three-in-one reliability evaluation system of ''performance baseline test-high and low temperature alternating test-accelerated aging test'' is constructed to evaluate the sealing performance, the structural stability and the signal consistency of the sensor under long-term operation conditions of high temperature, oil immersion and the like; and the structural integrity, the signal stability and the sealing reliability of the sensor under extreme working conditions such as oil immersion and high temperature are ensured.

The invention provides a programmed capacitance output device which comprises a processor circuit, a driving circuit, a first relay set, a capacitor set, a second relay set and a communication and interface circuit which are connected in sequence, the processor circuit is connected with the communication and interface circuit, and the communication and interface circuit is connected with upper computer software and a product to be tested. The driving circuit is connected with the second relay group; the output end of each capacitor in the capacitor bank can output three capacitance values through on-off setting of the relay, and any capacitance output value of a specified capacitance difference interval within a specified capacitance range can be obtained by adjusting the capacitance value of each capacitor. According to the invention, the multi-group capacitor input capability is provided for the segmented capacitive converters with different measuring ranges, the test requirements in various test scenes such as aging, temperature circulation and vibration when the converters are batched are met, and the test resources and the test cost can be saved to the greatest extent.