53 results about "Core test" patented technology

The invention belongs to the technical field of high-power microwave effect tests in laboratories, and relates to a built-in conformal optical fiber electric field sensor array test system and method, and the method comprises the following steps: S1, preparing before implementation; s2, quick assembly and disassembly are carried out; s3, real-time measurement and closed loop are carried out; s4, a step of result confirmation and log uploading; s5, a step of preparing a next round of experiment; the technical scheme of the invention is mainly used for carrying out internal electric field distributed measurement on a fixed test body or a slide rail supported test body in a shielding cabin, a compact range or a GTEM room and other experimental environments; the system is composed of a conformal optical fiber electric field sensor array, an optical fiber link unit, a photoelectric integration module, a self-calibration unit, an energy source and an interface, can be assembled and disassembled within 5 min, can be repeatedly used for more than 100 times, remarkably reduces the operation cost of a laboratory, and provides a core test means for a high-precision, high-efficiency and low-cost anti-missile weapon HPM effect test.

The invention discloses a device for testing the sealing performance of a full-size sleeve-cement sheath-stratum combination of a hydrogen storage bank. Relates to the technical field of petroleum and natural gas drilling and production engineering, and is characterized in that the device comprises a sleeve-cement sheath-simulated stratum maintenance device for preparing the simulated stratum, an alternating load applying device and a sealing performance testing device; the method comprises the following steps: preparing a full-size simulated stratum through a maintenance device, constructing a'sleeve-cement sheath-simulated stratum 'integrated assembly by taking the full-size simulated stratum as a carrier, completing maintenance, and detecting the sealing integrity of the cement sheath after simulating the actual underground working condition; the simulation stratum capable of being used for testing the sealing performance of the cement sheath is prepared, the full-size simulation stratum serves as a core testing carrier, and quantitative evaluation of the sealing performance of the full-size cement sheath is achieved.

The invention provides a combined pressure core test fixture, and belongs to the technical field of pressure sensors, the combined pressure core test fixture comprises a pressing plate, a fixed seat, a shaping module, a signal transmission plate and a signal acquisition plate, the pressing plate is provided with a plurality of air outlets; the fixed seat is provided with a plurality of mounting grooves for mounting the pressure core bodies; the shaping module is installed in the fixed seat and located below the installation groove, the shaping module is used for being in butt joint with the bottom of the pressure core body, and the shaping module is provided with a penetrating-out hole for a pin on the pressure core body to pass through and a conical guide hole located in the end, close to the pressure core body, of the penetrating-out hole; a spring needle connected with a pin on the pressure core body is arranged on the signal transmission plate; and the signal acquisition board is conductively connected with the spring needles. The combined type pressure core body test clamp can avoid pin damage, guarantees sealing reliability and test data accuracy, and is suitable for synchronous test of pressure core bodies of multiple specifications.

The utility model relates to the field of battery cell testing, and discloses battery cell charging and discharging testing equipment which comprises a supporting plate, a testing frame, a testing head, a heat dissipation frame and a heat dissipation assembly. The testing frame is fixedly arranged above the supporting plate, the testing heads are symmetrically arranged at the left end and the right end of the testing frame, the two testing heads can move close to or away from each other, and the heat dissipation frame is slidably installed at the bottom end of the testing frame. The utility model has the following advantages and effects: the battery is quickly mounted in the frame body through the mounting groove, a tester can quickly contact or separate the test electrode with or from the battery cell through the pressing plate, so as to realize the charge and discharge test on the battery cell, and after the charge and discharge test is finished, the heat dissipation cylinder can be driven to move through the pulling plate to quickly take out the battery cell, and meanwhile, the test efficiency is greatly improved. And the temperature generated by the battery cell can be quickly concentrated through the heat dissipation barrel, and is quickly cooled by the fan, so that relative normal temperature in the frame body can be kept in multi-batch measurement, and shutdown or influence on test data caused by over-high temperature is avoided.

The utility model discloses a hollow composite insulator for an ultrahigh-voltage large-capacity iron core test reactor, which comprises an insulating tube and an umbrella cover, the umbrella cover is of a sectional structure and is integrally formed on the insulating tube, annular grooves which are arranged at intervals are arranged on the outer wall of the insulating tube, tooth-shaped grooves are arranged on the groove walls of the annular grooves, and the tooth-shaped grooves are communicated with the umbrella cover. The two adjacent umbrella covers are arranged in the annular groove after being formed and spliced, and the two umbrella covers and the tooth-shaped grooves in the groove walls of the corresponding sides of the annular groove are solidified into a whole. According to the utility model, the outer wall of the insulating tube is provided with the annular groove, and when the umbrella cover is subjected to injection molding, part of silicone rubber flows into the annular groove and is solidified with the tooth-shaped groove to form a whole, so that the combination effect between the umbrella cover and the adjacent umbrella cover and between the umbrella cover and the insulating tube can be effectively ensured, and the sealing is ensured; and matched step surfaces are arranged at the joint of two adjacent umbrella covers, so that the combination effect is further ensured.

The utility model relates to the technical field of fixing devices, and discloses a fixing device for testing the magnetic performance of a transformer iron core, which solves the problems that the existing fixing device for testing the transformer iron core generally adopts an opposite-side clamping mode for fixing, the number of opposite-side clamping fixing points is small, and the positioning stability is poor. Supporting legs are fixedly installed at the four corners of the bottom of the workbench, a work frame is fixedly installed on one side of the workbench, an iron core body is arranged in the middle of the top of the workbench, two positioning rods are arranged on each of the four sides of the iron core body, and a supporting plate is arranged in the middle of the lower portion of the workbench. The four corners of the top of the supporting plate are fixedly connected with the bottom of the workbench through supporting rods, a driving motor is fixedly installed in the middle of the top of the supporting plate, and a transmission assembly is arranged at the output end of the driving motor. The transformer iron core test fixing device can position the four sides of the iron core, the number of clamping fixing points is large, and the positioning stability is improved.

The invention provides a method and a system for predicting the productivity of a mud pattern type shale horizontal well, and the method comprises the steps: firstly, obtaining nuclear magnetic logging data, core experiment analysis data, conventional logging data and test oil well data of target mud pattern type shale; then, geological dessert parameters and engineering dessert parameters are determined according to nuclear magnetic logging data and core experiment analysis data; wherein the geological dessert parameters comprise free hydrocarbon S1 of the target mud pattern type shale and the porosity corresponding to the condition that the nuclear magnetic transverse relaxation time is greater than 8ms; the engineering dessert parameters comprise the strength brittleness of the target mud pattern type shale. Thirdly, constructing a productivity index model according to the geological dessert parameters and the engineering dessert parameters; and finally, constructing a productivity prediction model for predicting the productivity of the target mud pattern type shale horizontal well according to the productivity index model and the test oil well data. By means of the method, the accuracy of productivity prediction of the mud pattern type shale horizontal well can be effectively improved, and therefore accurate prediction of the productivity of the mud pattern type shale horizontal well is achieved.

The utility model discloses an emergency escape testing device relates to escape protection technical field, and this testing device includes test platform, test platform, the top of test platform is provided with the impact block main part, and the outer peripheral surface of impact block main part is provided with respectively first impact surface, second impact surface and third impact surface. This emergency escape testing device adopts rotatable multi -faceted impact block as core testing assembly, and its different surfaces are designed as plane, cambered surface, sharp surface and multiple forms, can accurate simulation emergency escape scene possibly encountered sharp rock, reinforced concrete block and other irregular obstacles, through the transmission and positioning of worm wheel and worm, can realize impact block rotation to switch different impact surface to can imitate the various sudden impact situation that may face in the escape process, such as the object impact that building collapse produces, escape passage obstruction object collision etc.

The application relates to a filter core high-temperature durability test device and relates to the technical field of filter core tests, which comprises an operation table, the surface of the operation table is provided with a steam pretreatment assembly and a filter core test assembly; the steam pretreatment assembly comprises a supporting table fixedly connected to the upper surface of the operation table, the upper surface of the supporting table is fixedly connected with a pretreatment cylinder, the inside of the pretreatment cylinder is provided with a filter screen cylinder, and a steam input pipe is fixedly embedded on the left side of the pretreatment cylinder; the filter core test assembly comprises a fixing seat fixed to the upper surface of the operation table, and the upper surface of the fixing seat is fixedly installed with a limiting shell through bolts. The steam pretreatment assembly and the filter core test assembly are integrated, the two are communicated through a steam guide pipe, the steam can be directly introduced into the filter core test structure after being pretreated, the actual use environment of the filter core under high-temperature working conditions can be simulated, precise and stable test conditions are provided for the filter core high-temperature durability test, and the reliability and reference value of test data are improved.

The invention belongs to the technical field of aerodynamic test equipment, and discloses an opening and closing device for ventilation and heat dissipation, and the opening and closing device is installed at the downstream of a core test area of the equipment. The ventilation door body is hinged and fixed to the door frame through a door body hinge, and the fixed door frame is fixed to an equipment backflow section wall plate. The output end of the driving system rod body is hinged and fixed to the ventilation valve body through a swing hinge, the fixed end of the driving system rod body is hinged and fixed to the fixing support through an installation hinged support, and the fixing support is fixed to an equipment wall plate. The opening and closing device controls the air exchange amount through continuous opening degree change to achieve air exchange heat dissipation and temperature regulation and control of the low-speed aerodynamic test equipment, and meanwhile cold air and hot air are fully mixed at the downstream of a core test area of the equipment, so that it is guaranteed that the uniformity of a core test airflow temperature field is prevented from being affected while airflow heat dissipation is guaranteed. The opening and closing device for ventilation and heat dissipation is simple in structure, safe, reliable and low in manufacturing cost and has engineering practical value.

The application discloses a transformer winding deformation tester and relates to the technical field of intelligent sensors. The transformer winding deformation tester comprises a storage box, and a winding voltage detection mechanism is fixedly connected to the top of the storage box. The transformer winding deformation tester is characterized in that, through the synergistic effect of an airflow mechanism and a cooling assembly, an electric sliding block pushes airflow in embodiment one, sand particles circulate and absorb heat in embodiment two, and water cooling circulation is implemented in embodiment three, a heat exchange channel is established between a ventilation pipe and a test component, heat generated in the detection process is directly led out, the continuous temperature rise of a core test area is significantly reduced, the active heat dissipation mechanism is utilized to solve the problem of precision attenuation caused by long-time operation, airflow circulation, sand particles and water flow carry heat, the internal temperature of the test component is maintained balanced, the electronic components are prevented from drifting due to overheating, the long-term reliability of winding deformation analysis results is ensured, and multiple-mode heat dissipation schemes are provided.

The embodiment of the application provides a kind of blade torsional rigidity and shear core test method, adjusting clamp, blade torsional rigidity test method includes: the blade root is fixed, and blade is in suspended state;Fixed clamp is set in the first position and the second position of blade, adjusting clamp is set in the loading position of blade, first position, second position and loading position are spaced apart along the length direction of blade, and loading position is located on the side of first position and second position away from blade root;Test load is applied to loading position by adjusting clamp;Test load and the rotation angle of loading position under test load are obtained;The torsional rigidity of blade is determined according to test load and rotation angle.In the test method provided in the application, not only the torsional rigidity of blade can be determined, but also the accuracy of test result can be ensured due to the setting of two fixed positions.

This invention provides a method and apparatus for generating test panels for simulation models, relating to the technical field of test tool generation. The method includes: acquiring information about the simulation model to be tested from a visual simulation modeling platform and verifying its editable state; calling the module retrieval interface of the visual simulation modeling platform, and, in conjunction with a user-defined search depth, retrieving all valid constant parameter modules and full-dimensional structured information from the model; constructing core test logic and generating script code based on a preset panel template, automatically converting it to an application designer-compatible format, and simultaneously generating a test architecture file; finally generating a visual interface containing a control panel, data observation area, and status information panel. This addresses many drawbacks of manually creating panels, improves development efficiency, adapts to different versions of application designers, and enhances the quality of model development and testing on the visual simulation modeling platform.

The invention provides an intelligent generation method and system for a test case of a power grid business management system, and the method comprises the steps: obtaining power grid business knowledge from a knowledge service pedestal of the power grid business management system through a knowledge retrieval module in an intelligent agent based on a test demand document; based on the power grid business knowledge and the test requirement document, a business rule analysis module of the intelligent agent is used for analysis to generate a core test point and a generation instruction; driving a large language model to generate an initial test case based on the core test point and the generation instruction; and sending a trigger event in the initial test case to a fault deduction engine for fault deduction, generating a potential fault chain, inputting the fault chain into a large language model to generate a derivative test case, and obtaining a target test case in combination with the initial test case. Professional knowledge and industry specifications in the power grid field can be deeply integrated, and the industry conformity of the test case is improved.

The invention provides a reactor core test piece, and relates to the field of nuclear power. The reactor core test piece comprises a simulation shell corresponding to the real shell; the simulation hanging basket shroud assembly corresponds to the real hanging basket shroud assembly and comprises a simulation hanging basket barrel body and a simulation shroud assembly, the simulation hanging basket barrel body and the simulation shroud assembly are located in the simulation shell and are fixedly connected with the simulation shell, the simulation hanging basket barrel body comprises a first hanging basket end, the simulation shroud assembly comprises a first shroud end, and the simulation shroud assembly comprises a second shroud end. The end part of the first shroud is sleeved with the end part of the first hanging basket; the simulation fuel assembly corresponds to the real fuel assembly, and at least part of the simulation fuel assembly is located in the simulation shroud assembly.

The application discloses a built-in three-dimensional bond-slip testing device and a mounting testing method thereof, which is used for testing the bond-slip and vertical peeling at the interface of a steel plate-concrete composite structure, is mounted on the inner side of the steel plate before pouring the concrete, and comprises a steel shell and a core testing element located in the steel shell, wherein the steel shell is sealed with the bottom of the steel plate; the core testing element comprises a hollow conduit, a sliding head, a pre-tightening spring and six string strain gauges; two of the six string strain gauges are arranged along three directions of X, Y and Z respectively, and are used for testing the slip amount along the X and Y directions and the peeling amount along the Z direction between the steel plate and the concrete. The application is based on a novel internal structure, breaks through the defects of single testing direction and low dimension of the existing bond-slip testing, can realize the repetitive and intermittent non-continuous testing of the interface slip damage, and significantly improves the feasibility of long-term monitoring of the interface damage of the composite structure.

The embodiment of the present application discloses a kind of method for quickly determining tab spacing size, device and battery production system, for solving the technical problem of low efficiency and waste material in prior art, which needs to carry out core test paper and observe tab alignment condition multiple times to confirm the distance between tabs.The embodiment of the present application includes the following steps: S1, obtain the cross-sectional view of the winding core formed by the diaphragm and the tab of the full tab winding;S2, mark the preset tab position on the cross-sectional view of the winding core, then measure the cross-sectional view to obtain the distance between every two adjacent preset tab positions in the length direction of the tab.

The application discloses a handheld intelligent comprehensive tester for detecting a substation secondary circuit, which comprises a handheld shell, a display screen, a test connecting line, a wiring terminal area and an intelligent comprehensive test circuit. The display screen is arranged above the handheld shell. The wiring terminal area is arranged on the handheld shell and below the display screen. The test connecting line is used for connecting the substation secondary circuit to be detected and the handheld intelligent comprehensive tester. The intelligent comprehensive test circuit is arranged in the handheld shell and connected with the display screen and the wiring terminal area. The comprehensive tester integrates the core test functions of the substation secondary circuit into the intelligent comprehensive test circuit, realizes the rapid detection of the parameters of the substation secondary circuit by cooperating with the selection of the wiring terminal area, solves the pain points of the dispersion and complexity of the traditional test methods, improves the accuracy and safety of the test of the substation secondary circuit, reduces the operation and maintenance cost and guarantees the stable operation of the power system.

The application provides a new energy automobile electric core heat insulation buffering performance test method, and belongs to the heat insulation buffering performance test technical field. The method comprises the following steps: collecting electric core structure, test environment and dynamic response data, identifying failure risk sequence through thermal-mechanical coupling characteristic decoding, extracting characteristic identification to generate electric core test data set; extracting risk characteristics by using historical data, combining risk intensity distribution and anti-failure response curve to calculate heat insulation buffering safety benchmark value; generating initial failure judgment atlas, combining related parameters to construct dynamic compensation matrix to obtain dynamic failure judgment atlas; comparing the feature similarity of real-time test data and dynamic atlas, analyzing actual risk average, and completing performance diagnosis. The application improves test accuracy through dynamic compensation, realizes accurate identification and tracing of failure risk, solves the problems of fixed threshold and weak anti-interference of traditional methods, and guarantees the test precision of electric core heat buffering performance.

The application belongs to the technical field of high-power microwave effect test in laboratory, and relates to a built-in conformal optical fiber electric field sensor array test system and method. The method comprises the following steps: step S1, a step of implementing previous preparation; step S2, a step of quick assembly and disassembly; step S3, a step of real-time measurement and closed loop; step S4, a step of result confirmation and log uploading; and step S5, a step of preparation for the next round of experiment. The technical scheme is mainly used for distributed measurement of internal electric field of a test body fixed or supported by a sliding rail in a shielding cabin, a tight field or a GTEM chamber and the like. The system is composed of a conformal optical fiber electric field sensor array, an optical fiber link unit, an optoelectronic integrated module, a self-calibration unit and energy and an interface, can be assembled and disassembled within 5 minutes, can be repeatedly used more than 100 times, significantly reduces the operation cost of a laboratory, and provides a core test means for high-precision, high-efficiency and low-cost HPM effect test of anti-missile weapons.

The application discloses a kind of reservoir permeability prediction model construction method and medium include: S1 obtains core test data and is divided into several kinds of reservoir types, and each reservoir type is assigned permeability calculation model;S2 analyzes the well logging curve value of each core, obtains original well logging response sample point;S3 is formed according to well logging curve value analysis cognitive database, according to the well logging response sample point of cognitive database supplement reservoir type;And / or, according to original well logging response sample point adds gaussian noise and supplements well logging response sample point;S4 is trained by the permeability calculation model of reservoir type corresponding original well logging response sample point and supplemented well logging response sample point, whether training result meets preset condition is judged, yes, model construction is completed;Otherwise, execute S3.The application adds well logging response sample point supplement step in reservoir permeability prediction model construction, increases the training data of reservoir permeability prediction model, improves the accuracy of permeability prediction result.

The invention provides a multi-phase wire core testing method, system and device, a medium and a product, and relates to the technical field of electric power safety. The method comprises the following steps: executing a loop parasitic test on each phase of wire core in multiple phases of wire cores connected to a wire core test device to obtain a voltage value of the corresponding wire core; determining whether a target voltage value less than or equal to a voltage threshold exists in the plurality of voltage values; if yes, determining the wire core corresponding to the target voltage value as a target wire core; performing an insulation test on the target wire core to obtain an insulation resistance value of the target wire core; and determining the target wire core of which the insulation resistance value is smaller than the resistance value threshold value as a qualified wire core. According to the invention, the efficiency and accuracy of multi-phase wire core testing are improved.

The invention relates to the technical field of insulation testing, in particular to a secondary cable insulation testing instrument with an automatic recording function. Comprising a shell, a sealing cover is rotatably connected to the surface of the shell, a panel is inserted into the inner surface of the shell, a touch screen is fixedly connected to the upper surface of the panel, a cable switching plate is fixedly connected to the bottom end of the panel, a cable detection plate is fixedly connected to the bottom end of the cable switching plate, and a plurality of aviation connectors are fixedly connected to the upper surface of the cable switching plate. Through the design that the cable switching board is matched with the aviation joints, the core wire switching test of the multi-core secondary cable can be automatically completed, and frequent manual wire dismounting and wiring are not needed, so that the problems of single-core test and flow breakage of a traditional instrument are solved, the continuity and the overall efficiency of the insulation test of the multi-core cable are improved, and the test efficiency is improved. The touch screen is combined with a built-in network manager and a pluggable USB flash disk, automatic collection, processing, storage and export of test data are achieved, and a manual recording mode is replaced.

The present application relates to the technical field of wire copper foil, especially to a terminal pull-back assembly tool, which comprises a core test component, an electrical component box and a state indicating device, and the left and right sides of a main cavity block are respectively provided with locking mechanisms; the motion component part comprises a moving mechanism group and a fixed mechanism group, the moving mechanism group comprises a sliding plate and a cylinder connecting plate, the cylinder connecting plate is arranged above the sliding plate in parallel, the sliding plate and the cylinder connecting plate are connected through a sliding table cylinder, a probe fixing plate is arranged above the cylinder connecting plate, a transition plate is arranged in front of the cylinder connecting plate, a fine probe is arranged on the probe fixing plate, a probe piece is arranged on the front surface of the transition plate, and the tail of the probe piece is connected with a connecting screw through a probe piece channel arranged on the transition plate; the head of the probe piece is adapted to the position of the connector plastic shell; the effect that whether the terminal is inserted in place can be accurately detected through the device is achieved.

The application provides a method for local shock elimination and pre-control of long borehole directional fracturing in a mine, which comprises the following steps: taking core test of target coal seams and roof and floor strata; establishing a numerical simulation model of the target coal seam mining, and obtaining stress concentration characteristics of strata within a range of 50m normal distance of the target coal seam; recording the normal distance of the stratum with the highest stress concentration coefficient from the target coal seam and the dip angle of the target coal seam; arranging fracturing holes in the strata to be fractured at certain intervals along the strata dip direction; and drilling and fracturing according to the positions of the fracturing holes. The application obtains the stress concentration characteristics of the coal seam through numerical simulation, determines the stratum with the highest stress concentration coefficient, records the normal distance of the stratum from the coal seam and the dip angle of the coal seam, then arranges fracturing holes in the strata to be fractured at certain intervals, and finally drills and fractures according to the design, so that the coal seam shock is eliminated, and the safety production of the mine is ensured.

A core test method, for testing a processing circuit with multi cores, comprising: (a) testing defects of the cores to determine at least one failed core; (b) recording the failed core; (c) performing a performance test to all of the cores to generate performance data; and (d) filtering the performance data based on the failed core recorded in the step (b).

The invention discloses an in-situ testing method for a deep-buried soft rock tunnel, and relates to the technical field of geological exploration of deep-buried tunnel engineering. The method comprises a test early-stage preparation stage, a core test stage and a post-processing stage, the core innovation lies in that a three-dimensional point cloud technology is fused to realize full-process energizing of the test, and an unloading path is dynamically planned through an integrated design of three-dimensional point cloud fine exploration, graded unloading, multi-field coupling dynamic monitoring, anisotropic parameter inversion and rheological calibration verification. Seepage-stress-wave velocity-deformation multi-field data are synchronously monitored, and an improved genetic-particle swarm algorithm is combined to invert anisotropic parameters. According to the method, stress release interference can be effectively avoided, the testing precision and stability are improved, the defects of insufficient geological description, discrete deformation monitoring and the like of a traditional method are overcome, and reliable parameter support is provided for design and construction of the deep-buried soft rock tunnel.

The utility model discloses a soundproof room for amorphous alloy body roll iron core testing, which comprises a base, a soundproof room body and a placing door, one side of a first feeding mechanism is fixed with the base, and a second feeding mechanism and the first feeding mechanism which are convenient for material movement are arranged between the top of the base and the top of a transportation mechanism. Two sets of fixing frames are fixedly installed at the top of the base, and a hoisting mechanism facilitating material hoisting is arranged at the tops of the fixing frames. The amorphous alloy roll iron core can be conveyed to the position of the placing frame through the conveying mechanism and the first feeding mechanism, then the conveying mechanism can be fixed to one side of the base, and then the amorphous alloy roll iron core can be pushed to be conveyed into the sound insulation chamber body along the first feeding mechanism and the second feeding mechanism. And the hoisting mechanism arranged subsequently can hoist the amorphous alloy body roll iron core for detection, so that the resonance condition in the detection process can be prevented, and the accuracy of a test result is ensured.

The invention discloses a USB PD 3.1 test tool, which comprises a Type-C interface used for being connected with tested equipment and carrying out protocol communication and power transmission; the power transmission microcontroller is used for managing protocol communication, safety protection and system control of the USB PD 3.1; the buck-boost circuit is connected with the power transmission microcontroller and is controlled to generate an output voltage up to 48V; the load pulling change-over switch is used for intelligently guiding the received power to a built-in load pulling port or an external load pulling port; the microcontroller unit is connected with the power transmission microcontroller and is used for a user to set a working mode and parameters and monitor a state; according to the invention, two core test modes of Sink and Source are integrated in a single device, and a tester does not need to frequently switch connection among a plurality of discrete devices, so that the construction process of the test platform is greatly simplified, and the requirements for complex wiring and cooperative operation of a plurality of devices are reduced.

The utility model relates to a kind of electric core test compression devices, belong to electric core test technical field, to overcome the structure of electric core test compression device in relevant technology is more complex, the problem of higher manufacturing cost.The electric core test compression device includes first compression structure and second compression structure, first compression structure includes first compression piece and second compression piece and first adjusting piece, first compression piece and second compression piece form the accommodation space of the electric core to be measured, and first adjusting piece is used to adjust the interval of first compression piece and second compression piece.Second compression structure includes third compression piece, pressure test unit and second adjusting piece connected between first compression piece and third compression piece, third compression piece is located in the side of second compression piece away from first compression piece, pressure test unit is arranged between second compression piece and third compression piece, and second adjusting piece is used to adjust the interval of first compression piece and third compression piece, so that third compression piece is compressed by pressure test unit and second compression piece.