201results about How to "Improve test results" patented technology

The invention provides a hardware-in-the-loop simulation test method and device for a network construction type energy storage converter, and relates to the technical field of electric power grids. The network construction type energy storage converter is connected with the simulation energy storage system and the power grid simulation device, a hardware-in-the-loop simulation test system is constructed, and control parameters of the simulation energy storage system and the power grid simulation device are adjusted based on the simulation test system in combination with test types. Various types of hardware-in-the-loop tests and semi-physical tests such as fault ride-through tests, electric energy adaptability tests and black start tests are realized, and effective evaluation of the performance of the network-forming type energy storage converter is realized. According to the method, the problem of power grid oscillation caused by the fact that the network construction type energy storage converter is connected into the power grid for testing is avoided, the accuracy of the testing result of the network construction type energy storage converter is guaranteed, accurate capturing of performance parameters of different types of network construction type energy storage converters is achieved, and the testing effect of the network construction type energy storage converter is improved.

The invention discloses an automatic penetration test method, system and device based on deep reinforcement learning, and a medium, and the method comprises the steps: carrying out the vulnerability scanning and baseline verification of a device through employing a vulnerability scanning and baseline verification tool, and obtaining the vulnerability information of a tested system; generating an attack graph according to the obtained vulnerability information, determining a vulnerability utilization probability according to the vulnerability information, and assigning values to edges of the attack graph to obtain a Bayesian attack graph; designing an attacker target node reward value on the generated Bayesian attack graph, simulating a possible attack behavior of an attacker, and calculating an attack strategy of the attacker by using a deep reinforcement learning method; simulating potential attack behaviors of an attacker in the attack graph according to an attack strategy, and generating a penetration attack path which is most likely to be adopted by the attacker; and performing an automatic penetration test to generate a penetration test report. According to the invention, the penetration test scheme can be intelligently generated according to the vulnerability of the system, and the precision and efficiency of network security evaluation are greatly improved.

The invention relates to the technical field of hydraulic engineering, geotechnical mechanics and geological disaster prevention and control engineering, and discloses a landslide surge physical and numerical hybrid model construction method and system and application. Analyzing the landslide instability evolution motion process, the landslide warehousing first wave height and the surge propagation process of the landslide surge; performing a numerical simulation test according to a second result of the landslide surge numerical model test; adjusting the particle size and the kernel function in the landslide surge numerical simulation test, so that the first wave height, the opposite-bank arrival height and the surge pressure distribution in the landslide surge numerical simulation test and the landslide surge physical model test are consistent; and taking the adjusted landslide surge numerical model as the obtained landslide surge hybrid model. The system comprises a first result acquisition module, a second result acquisition module, a test parameter adjustment module and a hybrid model acquisition module. According to the method, different calculation working conditions can be conveniently analyzed.

The invention relates to a composite sensor for acceleration and pressure monitoring and a working method thereof, and belongs to the field of sensors, the composite sensor comprises an upper shell, a middle shell and a lower shell, the upper end of the upper shell is provided with an M6 mounting thread, the lower end of the upper shell is a hexagonal base, and a groove space is reserved in the inner side of the lower end of the hexagonal base; the appearance of the middle shell is a hexagonal base, and M5 mouthpiece installation holes are formed in the left side and the right side of the middle shell. A double-end beam sheet is arranged in the middle of the inner side of the middle shell and is of a sheet-shaped structure, and the two ends of the double-end beam sheet are fixedly connected with the front inner wall and the rear inner wall of the middle shell or integrally formed. The center of the double-end beam sheet is provided with an integrally connected cylindrical screw rod, and the cylindrical screw rod is provided with an acceleration sensor core body structure; the appearance of the lower shell is a hexagonal base, and a mounting groove is formed in the bottom of the lower shell and used for mounting a pressure sensor core structure; the upper shell, the middle shell and the lower shell are connected in a welded mode. The device is simple in structure, can realize synchronous monitoring of acceleration and pressure without mutual interference, and can realize multi-scene application at the same time.

The invention relates to a vehicle in-the-loop test method based on visual augmented reality. Firstly, a positioning and motion information acquisition system of a real vehicle is established, and high-precision motion information of the vehicle can be obtained; then image information and motion information of a vehicle-mounted camera are synchronously collected, and the purpose is to obtain camera output and vehicle motion information under the same timestamp; secondly, calculating the pose of the camera at each moment according to the internal participation initial external parameter information of the camera and the synchronously acquired motion information; synchronously inputting the calculated pose into simulation software, and obtaining virtual camera output consistent with the real camera in time and space; taking a really acquired camera image as a background, taking a traffic participant provided by a virtual simulation camera as a foreground, and obtaining fused image information of an augmented reality view angle through an image fusion algorithm; and finally, the fused image is input to the sensing layer, a sensing result is settled and then input to the decision control layer, a decision instruction is output to an execution mechanism of the vehicle, the vehicle motion information is changed and then is acquired by the high-precision information acquisition system, and thus a round of information circulation is completed.

The invention discloses a fuzz testing method and system for code generation and automatic program repair based on a large model, which are used for solving the problems of high code generation error rate and high testing cost in the running process of an existing large model fuzzer. The method comprises four stages of cue word screening, fuzzy circulation, program repairing and vulnerability detection. A large language model is used as a main generator, an operator selection problem in a fuzzy loop stage is modeled as a multi-arm tiger machine problem, and a Thompson sampling algorithm is used to improve the diversity and effectiveness of program generation. The generated program is cyclically repaired, so that program errors caused by lack of API (Application Program Interface) combination constraints are reduced. According to the method, the effectiveness of the program generated by the fuzz test based on the large model is obviously improved, the problem that the error rate of the program generated by an existing fuzzer based on the large model is high is solved, and the code coverage rate is higher.

The invention provides a core particle and a test method thereof, and the core particle comprises a home terminal generator which is used for generating and sending a test code to a sending channel for transmission; wherein one test code is transmitted through one sending channel, and the number of the test codes is the same as that of the sending channels; the home terminal multiplexer is used for receiving the detection code through the receiving channel; wherein one detection code is received through one receiving channel, and the number of the detection codes is consistent with the number of the receiving channels; and the home terminal checker is used for generating a corresponding check code according to the received detection code and checking the corresponding detection code through the check code, if the check is successful, the transmission channel corresponding to the detection code is unobstructed, otherwise, the transmission channel corresponding to the detection code is transmission fault. According to the core particle and the test method thereof provided by the invention, the requirements of a serial transmission test of a single channel and a parallel transmission test of a plurality of transmission channels can be met.

The invention belongs to the technical field of testing equipment, and particularly discloses a fastener locking effect overhaul testing device which comprises a base, a testing power mechanism is arranged on the outer side of the base, an air pressure stabilizing mechanism is arranged outside the base and used for stabilizing air pressure, and a testing mechanism is arranged in the base and used for testing the locking effect of a fastener. The test power mechanism provides test power for the test mechanism, one side of the test mechanism is provided with a sealing mechanism, the sealing mechanism is used for forming a sealed space with the test mechanism, the test power mechanism comprises a motor, the bottom of the motor is fixedly connected to the interior of one side of the base, and the bottom of the motor is fixedly connected to the interior of the other side of the base. And the output end of the motor is fixedly connected with an eccentric wheel. Through the combination of the test power mechanism, the air pressure stabilizing mechanism and the test mechanism, air pressures in different environments can be simulated while a vibration anti-falling test can be carried out, so that the multifunctionality of the device is realized, and the practicability of the device is further improved.

The invention discloses a multi-orbit and multi-system oriented low-orbit remote sensing satellite inter-satellite communication system, which comprises an inter-satellite medium and low orbit subsystem, an inter-satellite ground subsystem and an inter-satellite high orbit subsystem. The inter-satellite medium and low orbit subsystem is used for establishing a communication link with low orbit satellites and transmitting measurement and control information between the low orbit satellites; the inter-satellite ground subsystem is used for establishing a communication link with a ground station and transmitting measurement and control information between the satellite and the ground; the inter-satellite to-ground subsystem is also used for establishing a communication link with the near-ground aircraft to complete measurement and control information transmission; the inter-satellite high-orbit subsystem is used for establishing a communication link with a high-orbit satellite and transmitting satellite-ground measurement and control information; when a satellite-ground fault occurs, the inter-satellite communication system of the low-orbit remote sensing satellites establishes a satellite-ground fault troubleshooting communication channel to transmit information required by system troubleshooting. According to the method, the problem of simultaneous communication of inter-satellite communication links of the low-orbit remote sensing satellite under various systems in a cross-orbit manner is solved, and a technical foundation is laid for a multi-orbit multi-system inter-satellite communication application scene of the low-orbit remote sensing satellite.

The invention provides a charging robot scheduling method and a storage medium. The charging robot scheduling method aims at a plurality of charging requests in an intelligent parking lot, performs intelligent scheduling on a charging robot according to priorities of the charging requests and prediction of newly added charging requests, and comprises the following steps: constructing a priority potential field of a parking space-charging system based on the plurality of charging requests of a user; based on the constructed priority potential field of the parking space-charging system, modeling a multi-target tracking and priority intelligent scheduling process as a Markov decision process; based on the modeled Markov decision process, a reinforcement learning network based on the model is designed, and the reinforcement learning network comprises a dynamic network, a value-strategy network and a target network; based on the constructed reinforcement learning network, parallel training of a plurality of networks is realized by designing an interaction mode between a model of a dynamic network and a model of a strategy-value network and a collected data set.

The invention discloses a bearing steel ball strength multi-point testing device, and relates to the technical field of strength testing, the bearing steel ball strength multi-point testing device comprises a base, a hydraulic rod fixedly mounted above the base, a connecting plate fixedly connected to the telescopic end of the hydraulic rod, and a dynamic pressurizing mechanism comprising a motor fixedly mounted in the base, a driving shaft of the motor is fixedly connected with an inner bearing table rotationally connected with the base, a pressing plate and a positioning part used for preventing the steel balls from moving are arranged below the connecting plate, the positioning part comprises positioning rings hooped outside the steel balls, and the twelve positioning rings are arranged in a circumferential array around the center point of the inner bearing table; the inner bearing table rotates to drive the steel ball in the pressurized state to roll, the rolling state of the steel ball in the actual bearing operation process is simulated, and compared with an existing static pressurization strength test, the test result is closer to the actual use condition, so that the performance of the steel ball in the actual working environment is evaluated more accurately.

The utility model relates to the technical field of photovoltaic panel detection, and discloses a solar cell module EL test instrument, which comprises a movable base, the upper surface of the movable base is provided with a swing shaft, the top of the swing shaft is fixedly provided with a lifting frame, the surface of the lifting frame is provided with a lifting seat, and a lifting assembly is arranged between the lifting frame and the lifting seat. The surface of the lifting base is rotationally connected with a deflection shaft. According to the utility model, in the test process, the lifting assembly is arranged, the first servo motor is utilized to drive the vertical screw rod to rotate, the lifting seat can be driven to lift and move, the heights of the target plate and the photovoltaic panel can be adjusted, the inclination adjusting assembly is arranged, the second servo motor is utilized to drive the worm to rotate, and the target plate and the photovoltaic panel can be adjusted based on the engagement of the worm and the worm wheel. The target plate and the photovoltaic panel can be driven to incline front and back, and the angle is adjusted, so that the purpose of detecting the photoelectric conversion efficiency of the photovoltaic panel under various illumination angle conditions can be achieved, and the detection result is more comprehensive.

The utility model discloses a paper scratch tester which comprises a working table and a testing tool, a testing table and a supporting frame are arranged on the upper portion of the working table, a first driver is arranged in the working table and can drive the testing table to rotate, the supporting frame comprises a horizontal plate, the horizontal plate is located above the testing table, and the testing tool penetrates through the horizontal plate. The testing tool comprises a scratching head which can abut against the upper portion of the testing table. Paper to be tested is fixed on the test board, the position of the scratch head is kept unchanged, the test board can be driven to rotate through the first driver, and rotary scratch testing is achieved.

The invention belongs to the technical field of semiconductor testing, and discloses a semiconductor device steady-state thermal resistance testing device which comprises a box body, a control device is arranged on one side in the box body, an operation table is arranged on the other side of the box body, a testing plate is arranged on the top of the operation table, and supporting frames are arranged on the two sides of the operation table. A moving structure is arranged in the middle of the supporting frame, a testing sensor is arranged at the bottom of the moving structure, a testing groove is formed in the middle of the testing plate, and a semiconductor device is arranged in the testing groove. A semiconductor device is clamped and fixed through the clamping block and the moving block, meanwhile, the semiconductor device is cleaned through the cleaning structure, dust and impurities are prevented from adhering to the surface, the surface of the semiconductor device is prevented from being uneven, then the surface of the semiconductor device is evenly coated with heat conduction paste through movement of the scraper, gaps are effectively filled, and the heat conduction efficiency is improved. And meanwhile, the heat conduction effect is enhanced, so that contact thermal resistance is prevented from influencing the test effect.

The invention discloses an electrolytic bath pressure test platform and a test method thereof, belongs to the technical field of water electrolysis hydrogen production, and solves the problem of how to design a universal pressure test platform meeting different types of water electrolysis hydrogen production equipment. The electrolytic bath pressure test platform adopts the electrolyte circulation unit, the oxygen pressure control unit and the hydrogen pressure control unit to perform pressure control and electrolyte circulation on the electrolytic bath, is suitable for pressure regulation requirements of different types of electrolytic baths, and can be matched with corresponding pressure test methods according to characteristics of the electrolytic bath; an oxygen / hydrogen side loop is independently arranged, different types of electrolytic bath anode or cathode isobaric and differential pressure control is achieved through a back pressure valve, oxygen / hydrogen is discharged after passing through a separator after being output through the electrolytic bath, the pressure test platform system is high in integration degree, and the comprehensive test capacity is greatly improved.

The utility model belongs to the technical field of antifogging testing devices, and discloses an automobile lamp antifogging testing device which comprises a box body, a testing cavity is formed in the front face of the box body, a box door is rotatably connected to the front face of the box body, a water tank is fixedly connected to the bottom of the box body, and a water pump is fixedly connected to the top of the box body. A water inlet of the water pump is fixedly connected with a water pumping pipe, and a water outlet of the water pump is fixedly connected with a water outlet pipe. Through arrangement of a water pump, a net plate, a fan, a spraying pipe and a spraying head, water can be pumped through a water pumping pipe by starting the water pump and enters the spraying pipe from a water outlet pipe, the spraying head sprays mist, fan blades rotate at a high speed through the fan, then mist has strong airflow, and the scene that the automobile lamp follows an automobile to run at a high speed can be simulated; therefore, the device can test the anti-fog performance of the vehicle lamp facing high-speed airflow, and the test range of the device is expanded.

The utility model provides a magnetic sensor testing device which comprises a testing device base used for supporting and testing and a clamping structure used for clamping a sensor, the sensor clamping structure is arranged in the center of the upper surface of the testing device base, and the left front end of the testing device base is in circuit connection with an electromagnetic display screen. The front end of the testing device base is provided with an electromagnetic control knob, and the right front end of the testing device base is in circuit connection with a sensor display screen. The utility model relates to a magnetic sensor testing device, which is characterized in that through arranging a testing device base, each part is orderly used on the testing device base, the efficiency of the device is increased, through arranging an electromagnetic isolation device, the device can be isolated from other magnetic field influences, and test results are selected. And through the arrangement of the central disc and the sensor clamping structure, the magnetic sensor is firmly fixed, and the situation that the test result is affected due to infirm clamping is prevented.

The utility model discloses a laser paper surface adhesive force testing device which comprises a working table, a pressing roller and an adhesive tape roller are arranged above the working table, the adhesive tape roller is located above the pressing roller, the pressing roller and the adhesive tape roller can synchronously rotate, the rotation directions are consistent, and the pressing roller at least comprises a first extrusion part and a second extrusion part. The distance between the first extrusion part and the upper surface of the workbench is larger than the distance between the second extrusion part and the upper surface of the workbench. According to the laser paper adhesive force testing device, different pressures can be applied to different positions of laser paper during testing by arranging the compression roller with the extrusion parts of different sizes, adhesive force testing under multiple pressures is achieved, adhesive tape uncovering at the same angle and the same force can be achieved by arranging the adhesive tape roller, and the accuracy of a testing result is improved.

The present invention discloses a system testing method, device, equipment and product for adaptively adjusting load, comprising establishing a data set consisting of historical load characteristic data and historical performance characteristic data; using the data set to perform model training to obtain a prediction model; using the prediction model to predict predicted performance characteristic data corresponding to the instantaneous load characteristic data; and adjusting the test data input to the system according to a preset adaptive adjustment strategy based on the predicted performance characteristic data. The present invention discloses a system testing method, device, equipment and product for adaptively adjusting load, which can adaptively adjust the load to test the system, fully simulate the load scenario of actual business, improve the test effect on the system, and protect the stability of the system during the test.

The invention discloses a method and equipment for determining host physiological parameters and a medium. The method comprises the following steps: determining an impedance value of host tissue fluid according to a test current and a test voltage of a host physiological parameter detection device; determining the current body temperature of the host based on the impedance value and a fitting function between the impedance value and the body temperature of the host; and based on a compensation function between the host body temperature and the host physiological parameters, determining the host physiological parameters corresponding to the current host body temperature. According to the scheme, the accuracy of the host physiological parameter measurement result can be improved.

The invention discloses an autonomous evolution type 5G protocol fuzzy test system based on a large language model, and the system comprises a protocol extraction unit which employs the large language model to analyze a 5G protocol specification document, and extracts structured protocol knowledge elements containing a message format, state machine logic and parameter constraints; the vulnerability analysis unit generates a potential vulnerability description list through big language model reasoning based on the knowledge elements; the test strategy generation unit drives a large language model to generate a targeted test case based on protocol knowledge, vulnerability description and historical test knowledge in the dynamic test knowledge base; the test execution unit executes the use case and captures a result; and feeding back an analysis result of the internalization unit, extracting a causal rule, generating new test knowledge and feeding back the new test knowledge to the knowledge base. According to the system disclosed by the invention, test targets and resources can be autonomously scheduled according to continuous updating of the knowledge base, so that the test process has an iterative optimization capability, and full-process automation and intelligentization of 5G protocol fuzzy testing are realized.

The utility model relates to the technical field of concrete pressure testing, in particular to a concrete pressure testing machine with a dust removal function, which comprises a base, a loading box is fixedly connected to the left side of the top of the base, and a cleaning assembly is arranged on the left side in the loading box; the fixing block is fixedly connected to the left side of the interior of the loading box, an air cylinder is fixedly connected to one side of the fixing block, a telescopic rod is movably connected to the end, away from the fixing block, of the air cylinder, a brush rod is fixedly connected to one side of the telescopic rod, and a brush is fixedly connected to the bottom of the brush rod. According to the concrete pressure testing machine with the dust removal function, the piston is pushed to move by utilizing gas expansion in the combustion process through the air cylinder, so that a brush falls on the induction disc to sweep back and forth, residual dust and mud particles on the induction disc are swept into a protection compartment, the dust on the induction disc is swept through the brush, the labor intensity of detection personnel is reduced, and the detection efficiency is improved. And meanwhile, the concrete test is quicker and more effective.

The invention belongs to the technical field of electric power engineering, and discloses a system and method for measuring the grounding resistance of a tower in a grounding looped network, and the system comprises a data obtaining module which is used for obtaining the current values and voltage values of a grounding line in different switching states in different environments; the first data processing module is used for calculating grounding resistance values in different grounding lines according to the current values and the voltage values of the grounding lines in different switching states in different environments; preprocessing the grounding resistance values in the different grounding lines to obtain grounding resistance data sets in the different grounding lines; the resistance change prediction module is used for training according to the grounding resistance data sets in different grounding lines to obtain a line tower grounding resistance prediction model, and predicting the change trend of the line tower grounding resistance through the line tower grounding resistance prediction model; accurate monitoring of the grounding resistance is achieved, potential problems can be found as early as possible, and the fault risk is reduced.

The invention belongs to the technical field of rubber fender performance test, and particularly relates to a rubber fender performance test management system which comprises a server, a test item risk feedback module, a test item importance feedback module, a test supervision intensity comprehensive evaluation module, an operation matching degree detection and analysis module and a performance test evaluation early warning module. According to the invention, the risk analysis and the importance analysis are carried out on the corresponding performance test items, and the supervision intensity is judged based on the risk analysis result and the importance analysis result, so that supervision measures with the corresponding intensity are adapted when the corresponding performance test items are carried out, and safe and efficient completion of the corresponding performance test items is ensured. And matching degree analysis is carried out on corresponding performance test items and corresponding test operators, so that management personnel can carry out test personnel adjustment in time, the smooth and efficient test process is further ensured, and the accuracy of a rubber fender test result is ensured.

The utility model discloses a building exterior wall water seepage testing device, which relates to the technical field of water seepage testing devices and comprises a rectangular frame, a U-shaped frame is arranged at the upper end of the rectangular frame and can do reciprocating rectilinear motion along the horizontal direction, a folding plate is arranged inside the U-shaped frame, a circular plate is arranged on the outer side of the U-shaped frame, and the circular plate and the folding plate rotate synchronously. A water conveying pipe is arranged on the side face of the folding plate, a plurality of nozzles are arranged on the outer side of the water conveying pipe, a hose is arranged at the water inlet end of the water conveying pipe, a water pump is arranged at the water inlet end of the hose, and the water inlet end of the water pump communicates with external clean water; the spray head on one side of the folding plate horizontally reciprocates to spray a large area of the outer wall surface, the test effect is improved, and meanwhile, the folding plate can be folded and stored, is convenient to carry and does not occupy space.

The invention relates to the technical field of sensor detection, in particular to a sensor environment simulation testing device, which comprises a shell part, the clamping part is used for clamping and fixing a sensor to be tested and detected; the environment simulation part is installed in the shell part and generates a simulation environment for detection according to the working environment of the sensor; the system has three different single simulation environments and two different combined simulation environments, environment simulation can be better performed for sensor testing, the simulation environments are more real and comprehensive, and it is ensured that obtained sensor testing data are more accurate; the spray head is automatically opened through water pressure and automatically closed when the water pressure is low, the problem that the spray head is blocked by sandy soil can be avoided, meanwhile, water flow impacts the water rotating strip when passing through the water diversion channel, then the blocking body is driven to rotate, the water flow also has the rotating diversion effect, spraying is more uniform, the environment simulation degree is increased, and the testing effect is improved.

The invention relates to the technical field of wind tunnel testing, and discloses an adjustable open type wind tunnel testing device which comprises a testing upper box body and a first testing lower box body, the testing upper box body and the first testing lower box body are fixedly connected through bolts, and the inner wall of the testing upper box body is fixedly connected with a mounting frame. A plurality of groups of wind tunnel modules are arranged in the mounting frame, each wind tunnel module is composed of a mounting frame and six fans, a driving motor is arranged on one side of each fan, a mounting plate is fixedly connected to one side of the mounting frame, a plurality of clamping holes are formed in one side of the mounting plate, mounting holes are formed in the outer side of the mounting plate, and butt joint holes are formed in one sides of the fans. According to the invention, through the arrangement of the adjustable wind tunnel module and the modular design, the flexible adjustment of the test environment is realized, so that the complex airflow environment in the actual flight of the unmanned aerial vehicle is simulated more accurately, and the wind tunnel test device is more flexible, occupies a smaller area and is more suitable for various test scene requirements.

The invention, which relates to the technical field of the BCI immunity test system, discloses a pre-test system suitable for high-current injection immunity, comprising a signal generator module, a power amplifier module, a current injection probe module, a monitoring and feedback module and a control and processing module. The large current injection immunity pre-test system can help an EMC engineer to quickly establish a large current injection (BCI) pre-test capability at a research and development site in the early development stage, effectively reduces the risk of product design, research and development, and has the advantages that the equipment investment of the site, the power amplifier and the current injection clamp is much smaller than that of a standard laboratory, and meanwhile, control software is not needed, so that the design and development efficiency is greatly improved. Therefore, the overall fixed asset investment of the pre-test system is very low, the research and development investment pressure on the majority of small and medium-sized enterprises is not large, the test result of the pre-test system is highly consistent with that of a standard test laboratory, and the pre-test system can be completely used for development test in the research and development stage.

The invention belongs to the technical field of testing, and particularly relates to an electrical automation automatic adjustment test board which comprises a cabinet body, the top of the cabinet body is connected with a supporting table through bolts, one side of the top of the supporting table is connected with a test frame through bolts, and one side of the test frame is provided with a plurality of testers. A clamping mechanism is arranged at the top of the supporting table, base plates are arranged on the two sides of the top of the clamping mechanism, fixing clamps are connected to the tops of the two base plates through bolts, through openings are formed in the two sides of the tops of the two fixing clamps in a penetrating mode, and fixing mechanisms are arranged between the two through openings and the fixing clamps. Through cooperation between the clamping mechanism and the fixing mechanism, the to-be-tested piece can be effectively fixed, so that the test stability of the to-be-tested piece is improved, and the situation that the position of the to-be-tested piece deviates due to vibration in the test process is prevented; therefore, the lead between the to-be-tested piece and the tester falls off to influence the test of the to-be-tested piece.