42results about How to "Reduce test preparation time" patented technology

The invention relates to the technical field of software testing, and discloses an agent-based multi-dimensional test sample automatic generation method and system.The agent-based multi-dimensional test sample automatic generation method comprises the steps that code changes are captured, interface definitions are extracted, and multi-source data are fused for consistency verification; constructing a multi-dimensional dependency graph and analyzing the change influence to obtain an associated interface list; generating a multi-dimensional test scene; performing parameter traceability and consistency derivation, and initializing test data and environment to obtain a complete test data set; generating a use case code, and performing hierarchical optimization and executable verification; test arrangement optimization and automatic execution are carried out, and faults are monitored and diagnosed in real time; carrying out multi-dimensional analysis and defect identification, dynamically evaluating the value of a test case and optimizing a test strategy to obtain a comprehensive test report; according to the invention, full-process automation of test case generation is realized, the test efficiency and quality are improved, and the test maintenance cost is reduced.

The invention relates to the technical field of pressure testing, in particular to a pressure testing device for a chemical liquid container. Comprising a shell, a mounting base, a placement base, a first inflator pump, a connecting pipe, a connector and the like, the mounting base is connected to the side face of the shell, the placement base is connected to the bottom in the shell, a container body can be placed at the top of the placement base, and the first inflator pump is mounted at the top of the mounting base; the connector is connected to the other end of the connecting pipe and used for being connected with the connector of the container body. The camera can shoot a leakage part and transmit an image to the external displayer, an operator can confirm the specific leakage position through the displayer, then a leakage point is automatically marked through the marking pen, and therefore the leakage point of the container body can be automatically positioned and marked; the tedious process of manually checking connection points and welding seams one by one can be avoided, and the detection efficiency and precision are improved.

The invention belongs to the related technical field of integrated circuit testing, and discloses a power semiconductor dynamic parameter alternating test system, which comprises a plurality of groups of test fixtures, a protection device, a switching matrix and a limiting trigger circuit, and is characterized in that the test fixtures are independently and controllably used for clamping and fixing each test object; the protection device is designed to be capable of being switched among a plurality of groups of test clamps, and after the protection device is switched to a certain group of test clamps and completely covers the test clamps, the protection device immediately triggers the limiting trigger circuit installed at the test clamps. And the limiting trigger circuit is used for activating the switching matrix after being triggered, then distributing the test resources to the current test fixture, and executing an alternate dynamic parameter test. The invention further discloses a corresponding testing method. According to the invention, the test process is optimized, the test preparation time is reduced, the test efficiency of the power semiconductor can be significantly improved, and the safety and reliability of the test process are enhanced.

The invention discloses a universal power supply and distribution equivalent device for satellites. When power supply and distribution ground equipment is verified, the industrial personal computer generates a control instruction through a liquid crystal screen or an external device and transmits the instruction to the single-chip microcomputer on the mother board, the single-chip microcomputer on the mother board receives the instruction and then generates an access selection instruction and a function selection instruction and sends the access selection instruction to the switch matrix daughter board, and the switch matrix daughter board sends the function selection instruction to the switch matrix daughter board. Sending the function selection instruction to the function equivalent daughter board; the switch matrix daughter board switches on or switches off the corresponding optical isolation FETs to realize the access selection function after receiving the access selection instruction, and the function equivalent daughter board drives the optical isolation FETs to switch on or switch off to select the corresponding equivalent modules after receiving the function selection instruction. Therefore, the functional equivalent daughter board can simulate a satellite to receive a wired instruction, monitor the correctness of the instruction, simulate the transmission of wired telemetry signals on the satellite, and monitor the power supply voltage of sub-array power supply or centralized power supply so as to detect whether the functional performance of ground equipment is normal or not.

This invention relates to the field of glass production testing technology, specifically disclosing a glass cold bending ultimate failure test device and method. The device includes a worktable and four identical cold bending loading units. Each unit integrates a planar displacement structure with horizontal displacement capability, a liftable and directional adjustable support structure, and a pressure head connected by a ball joint. During testing, the planar displacement structure of each unit is first adjusted to accommodate glass specimens of different sizes. Then, the support structures of three units form an L-shaped support surface, and their pressure heads press against corresponding corner points on the upper part of the specimen to establish stable constraints. Finally, the pressure head of the fourth unit applies a concentrated load to the unconstrained corner points, while automatically monitoring the load and displacement until the specimen fails. This invention, through modular and automated design, achieves high versatility of the device, high testing accuracy, and high operational safety, effectively improving testing efficiency and data reliability.

This invention discloses a universal cryogenic valve heat leakage performance testing device and method, belonging to the field of valve testing technology. It includes: a cryogenic valve to be tested installed on the upper end of a cryogenic thermostat; the valve seat of the cryogenic valve to be tested connected to a valve heat exchanger via a pipe clamp; a first cold shield surrounding the valve seat; a valve support including a first flange adapted to different cryogenic valves to be tested; two cold shields installed inside the cryogenic thermostat, both with modular sidewall designs, flexibly adaptable to different cryogenic valves to be tested; two heaters connected to a temperature controller respectively installed on the heat sink and the pipe clamp; a GM refrigeration unit installed inside the cryogenic thermostat, including two-stage cold heads; a second cold shield surrounding the two-stage cold heads; a secondary cold head with a secondary heat exchanger connected to the valve heat exchanger; a helium supply device connected to the primary heat exchanger on the primary cold head; a helium recovery device connected to the valve heat exchanger; and a vacuum pump unit connected to the cryogenic thermostat. This invention improves testing efficiency and device utilization.

This utility model discloses a foldable quick-release triaxial apparatus pressure chamber, including an axial pressure rod. Four pressure chamber sector plates are arranged at the bottom of the axial pressure rod, with two pressure chamber sector plates forming a group. Two pressure chamber sector plates in the same group are connected by three hinges. The bottom of all four pressure chamber sector plates is provided with a common base. Limiting blocks are fixedly connected to the outer walls of the top and bottom ends of the pressure chamber sector plates. Two limiting blocks at the same end have stops on their adjacent sides. A square plate is fixedly connected to one side of the stop, and two round rods are fixedly connected to the square plate on the side away from the stop. This utility model, through its foldable structure design, reduces the volume of the equipment during transportation or storage, making it easy to carry. The modular quick-release structure allows key components to be assembled or disassembled without manual operation via snaps and magnetic interfaces, lowering the barrier to entry and optimizing the complex installation steps of traditional triaxial testing instruments, thus shortening test preparation time.

This utility model relates to the field of lithium battery testing equipment and discloses an aluminum-cased battery cell OCV testing fixture. Its features include: a base with a positioning component for fixing the battery cell; a guide post vertically mounted on the base; a fixing plate fixedly mounted on the guide post; a push plate slidably mounted on the guide post; a positive electrode probe group and a negative electrode probe group mounted on the push plate; and a pusher component on the fixing plate for controlling the push plate's up-and-down movement along the guide post. This utility model features improved testing efficiency and strong versatility. Furthermore, the test is completed by pressing the probes down using a cylinder, ensuring good contact and stable operation.

A test device of a plunger pump comprises an adapter, a liquid outlet pipeline, a liquid return pipeline, a direction control valve, a data collector, a hydraulic pressure regulator and a controller. The adapter is sealingly connected to a liquid inlet end of the plunger pump. One end of the liquid outlet pipeline is connected to the adapter, and the other end of the liquid outlet pipeline extends into an external test liquid. One end of the liquid return pipeline is connected to the adapter, and the other end of the liquid return pipeline extends into the external test liquid. The direction control valve is arranged at the connection between the liquid return pipeline and the adapter. The data collector is arranged in the liquid outlet pipeline to collect the hydraulic pressure value in the liquid outlet pipeline. The hydraulic pressure regulator is arranged in the liquid outlet pipeline to regulate the hydraulic pressure value in the liquid outlet pipeline. The controller is electrically connected to the plunger pump to control the liquid inlet and the liquid return of the plunger pump, and is electrically connected to the hydraulic pressure regulator and the data collector to receive a preset test hydraulic pressure value input by a user to control the hydraulic pressure regulator to regulate the hydraulic pressure value in the liquid outlet pipeline to the preset test hydraulic pressure value. The application realizes automatic testing of the plunger pump under different hydraulic pressures, and improves the testing efficiency.

The application discloses a kind of test simulation equipment for simulating throwing anchor, dragging anchor in ship movement.The equipment includes water tank and track system, tow control system, anchor operating mechanism and data acquisition and processing system;Water tank and track system provide test water environment and the height of trailer (for simulating ship) from water surface, tow control system drives trailer to move along track, anchor operating mechanism controls anchor dropping position by receiving signal, realizes throwing anchor simulation, data acquisition and processing system monitors anchor chain stress in real time, captures anchor body into water and dragging process by high-speed camera, all data are integrated transmission to control computer by synchronizer, and after processing, output anchor dropping speed curve, anchor chain dragging force peak value and drag anchor trajectory and other parameters.The all test simulation elements of the application are controllable and known, easy to use, can play the role of improving the accuracy and test efficiency of ship throwing anchor, dragging anchor test simulation.

The utility model discloses an automobile spoiler detection device, which relates to the technical field of aerodynamics, and comprises a support frame, the top of the support frame is fixedly connected with a connecting shell, the connecting shell is provided with an adjusting mechanism, the connecting shell is provided with a placing mechanism, the adjusting mechanism comprises a control console, and the control console is connected with the connecting shell. According to the spoiler detection device, the sliding rod is arranged, the fan blows air to the surface of the spoiler, the rotating speed of the fan can be adjusted through the console, then the detector can detect the surface of the spoiler, and during detection, the sliding rod can slide in the guide disc and drives the rotating strip to move at the moment, so that the angle of the air blown to the spoiler is changed, and the spoiler detection device is convenient to use. By means of the sliding rod capable of sliding in the guide disc, the angle of wind blowing on the spoiler can be changed, the influence of the spoiler on air flow at different angles can be evaluated more accurately, and the effect that the spoiler optimizes the performance of an automobile under various conditions can be known easily.

The invention discloses a generator core loss test system and method for reducing test impact current, comprising a power supply unit, a switch control unit, a current measuring unit, a voltage measuring unit, a multifunctional power measuring unit, an excitation coil unit, a measuring coil unit and an iron core unit to be tested; the excitation coil unit and the measuring coil unit are wound on the iron core unit to be tested, the power supply unit is connected to the excitation coil unit via the switch control unit, the excitation coil unit is connected to the multifunctional power measuring unit via the current measuring unit, and the measuring coil unit is connected to the multifunctional power measuring unit via the voltage measuring unit. The system and method can effectively reduce the impact current when the switch is closed while saving test costs, reducing workload and shortening test preparation time, thereby greatly improving the economy and safety of the iron loss test.

The invention provides a hardware-in-the-loop test interface management method and system and computer equipment, and the method comprises the steps: obtaining first interface information which comprises interface information provided by hardware equipment on a hardware-in-the-loop rack; analyzing a test requirement input by a user, searching in the first interface information based on an analysis result, and recording the searched interface information as second interface information; and performing interface allocation on the second interface information according to an interface allocation strategy determined in advance or in real time, and performing interface connection on the to-be-tested equipment according to an interface allocation result. According to the method and the device, the interface resources of the hardware on the ring rack can be automatically identified, distributed and connected, manual intervention is reduced, the test efficiency of the to-be-tested equipment in the test process is improved, and risks caused by manual misoperation are reduced. Through automatic interface allocation and connection, required interface resources can be quickly prepared for the to-be-tested equipment, and the test preparation time is shortened.

The invention discloses a satellite storage test system, method, device and medium, and relates to the technical field of spaceflight testing, and the system comprises a DC stabilized power supply and a portable terminal in which test software is stored; the direct-current stabilized power supply is used for supplying power to the portable terminal and a satellite to be tested; and the portable terminal is used for testing the to-be-tested satellite according to the test items of the to-be-tested satellite, and generating and storing a test result. According to the invention, the defect that the test system needs to be rebuilt and configured and debugged after being transported and transferred can be avoided, and the test preparation time is shortened.

The invention relates to the technical field of vacuum switches, and discloses an automatic control system and method for an X-ray test of a vacuum arc-extinguishing chamber, and the system comprises a fluorinated liquid adding and recycling unit, a data collection and control system, a test tool unit, a mechanical power unit, and a measurement unit. The test tool unit comprises a test groove, a vacuum arc-extinguishing chamber and an insulating support assembly. An observation window is formed in the side wall of the test tank; two ends of the insulation support assembly are connected with power ends. The liquid level sensor is arranged in the test tank; the measuring unit is located outside the test tank, and the measuring end of the measuring unit is aligned with the observation window of the test tank; the control end of the data acquisition and control system is respectively connected with the fluorinated liquid storage unit, the liquid level sensor, the mechanical power unit, the measuring unit and the power supply end. According to the invention, integration and intellectualization of an automatic control system are realized, automatic opening of the vacuum arc-extinguishing chamber, automatic measurement of the opening distance and automatic adding and recycling of the fluoride liquid are achieved, and the working efficiency is improved.

The invention discloses a special power supply module for a modularized transformer test, relates to the technical field of distribution network test equipment, and aims to solve the problems that the existing test equipment is dispersed, the power supply adaptability is poor, the safety protection is insufficient and the environment adaptability is weak. The system comprises a core power supply module, a gear adjustment module, an intelligent adaptation module, a safety protection module, an emergency stop module and an integrated installation structure. The core power supply module supplies power to each module, and the integrated installation structure reserves a standard interface and supports rapid replacement of various test modules. The core power supply module realizes integrated movement of test equipment and a power supply, the gear adjustment module accurately regulates and controls output parameters, the intelligent adaptation module automatically matches test parameters, the safety protection and emergency stop module constructs a whole-process safety guarantee, and the whole device has strong environment adaptability. The method can improve the test efficiency and accuracy, reduces the safety risk, and is suitable for various test scenes of the distribution network transformer.

The invention relates to a low-frequency high-electric-field radiation testing device, system and method, and the device comprises an input end which is used for transmitting an electromagnetic signal; the load end is used for receiving an electromagnetic signal; the bracket is arranged between the input end and the load end; two ends of the transmission line group are respectively connected with the input end and the load end, the middle part of the transmission line group is erected on the bracket, and the transmission line group is used for generating an electromagnetic field below when an electromagnetic signal is introduced and taking the electromagnetic field as a test area; the transmission line group is provided with a plurality of transmission lines, one end of each transmission line is radially erected on the support with the input end or the load end as the center, and the middle of each transmission line is erected on the same horizontal plane at a preset interval. According to the low-frequency high-electric-field radiation testing device, system and method provided by the invention, the problems of non-uniform field intensity, low test efficiency and high cost of a traditional antenna radiation mode in an HIRF test can be solved, a more uniform radiation field is realized, the test efficiency is improved, and the test cost is reduced.

The application provides a water tank capable of simulating a decompression environment and a multi-degree-of-freedom underwater launching device and a use method thereof, and belongs to the technical field of ocean engineering test. The application solves the problems of insufficient flexibility, complex structure and poor environmental adaptability of a traditional underwater launching device, and provides a test method for researching the multi-degree-of-freedom motion characteristics of a cross-medium water-exiting underwater multi-degree-of-freedom motion. The application comprises a decompression water tank, a lifting platform structure, a two-degree-of-freedom holder device and a horizontal sliding platform device. The application can realize the simulation of the multi-degree-of-freedom motion conditions of an environmental pressure, an attack angle, a pitch angle, a roll angle and a heave motion single-degree-of-freedom or multi-degree-of-freedom superposition of a carrying platform, and can meet the inclined launching test of a water-exiting vehicle. The application is mainly applied to the simulation of the underwater multi-degree-of-freedom motion of a cross-medium vehicle under a scale model ejection condition.

This utility model relates to the field of pulse testing technology, specifically disclosing a portable dual-pulse testing device, including a top cover, a housing, and module fasteners. The top cover houses a wiring panel, a dual-pulse controller, a dual-pulse emulator, and an HPD driver board. The dual-pulse controller is connected to both the HPD driver board and the wiring panel, and the dual-pulse emulator is connected to the wiring panel. The housing includes a support base, a DC filter capacitor, a DC busbar, an absorption capacitor, and a dual-pulse testing platform. The DC filter capacitor and the dual-pulse testing platform are both fixed to the support base. The absorption capacitor is soldered to the output end of the DC busbar. The DC busbar has six inductor wires and is fixed to the DC filter capacitor. Module fasteners are located on the top of the dual-pulse testing platform. The power input line, six inductor wires, and AC output terminal inductor wires of the DC busbar are all connected to the wiring panel. This design solves the problems of high cost, poor adaptability, and insufficient portability of existing testing equipment.

This utility model relates to the field of PCB board testing technology and discloses a PCB board that can replace the bed-of-pipe wiring of test fixtures. It includes: a PCB support base plate, a PCB encapsulation cover plate, and a PCB board body. The PCB encapsulation cover plate is fixedly connected to the top surface of the PCB support base plate, and the PCB board body is slidably connected to the inner side of the PCB encapsulation cover plate. A buffer guide assembly is disposed between the PCB support base plate and the PCB board body. A pin connection adjustment assembly is disposed on the side of the PCB board body. This utility model improves stability and reliability through buffer guidance, enhances flexibility and shortens test preparation time through pin adjustment, reduces maintenance and customization costs and test errors by replacing traditional probes with a PCB board, and also reduces contact pressure to protect the circuit board under test. It solves the problems of complex process, high cost, poor flexibility and adaptability, and easy damage to test points associated with traditional bed-of-pipe wiring.

The invention relates to an automatic regression test method and device, computer equipment and a storage medium. The method comprises the following steps: determining services and development branches related to the project submission test based on project submission test information, and recording the services and development branches as target services and target development branches; determining a change method in the target development branch through Jgit static analysis; the changing method is a newly added or changed method; determining an influence range of the change according to a change method in the target service and the target development branch; screening matched flow data in a flow pool through the change influence range, and assembling a test task according to the screened flow data; and executing the test task. According to the method, the test case can be automatically configured in the regression test, and the test range can be accurately and dynamically adjusted according to the changed code.

The present invention discloses a short rotor auxiliary starting device, comprising: a centering chassis, a through hole for positioning an auxiliary support rod is formed in the middle, a connecting boss is formed in the middle of the top, a threaded hole with the same diameter and axis as the through hole and in communication is formed in the middle of the connecting boss; an auxiliary support rod passes through the through hole and the threaded hole of the centering chassis, and an external thread is formed on the outside of the upper end thereof to match the threaded hole; a support head is arranged at the bottom end of the auxiliary support rod. The use of the present invention completes the auxiliary starting of a single pin-type lower support-constrained short rotor, shortens the test preparation time, reduces the difficulty of operation, improves the safety of the test of this type of rotor, and can adapt to single pin-type lower support-constrained short rotor systems of various sizes.

The invention discloses a wear resistance detection device for wire and cable production and a method for using the device, relates to the technical field of wear resistance testing, and aims to solve the technical problem of low efficiency of existing wire and cable wear resistance testing devices. The invention comprises a detection base. The invention fixes the two ends of the wire and cable by symmetrically arranging cable fixing mechanisms on the detection base, arranges a reciprocating screw mechanism at a position of the detection base close to the back of the cable fixing mechanism, arranges an omnidirectional wear testing mechanism on the reciprocating screw mechanism, drives a rotating component, a size adjustment component and a synchronous displacement component of the omnidirectional wear testing mechanism to reciprocate and perform friction testing on the cable surface through the reciprocating screw mechanism, and the synchronous displacement component in the invention can perform wear resistance testing on the cable from multiple sides at the same time, greatly shortens the test time, improves the test efficiency, and obtains the test result more quickly, thereby accelerating the product development and production progress and reducing the test cost.

The invention relates to the technical field of obstacle avoidance mechanism load simulation testing, in particular to a hydraulic obstacle avoidance mechanism multi-degree-of-freedom load simulation testing machine which comprises a load simulation mechanism and a snow removal shovel arranged at the upper end of the load simulation mechanism. A driving mechanism is fixedly connected to the inner side end face of the upper end of the load simulation mechanism, and a clamping mechanism is fixedly connected to the upper end of the driving mechanism and used for clamping and fixing the two sides of the snow removal shovel; the driving mechanism comprises transmission assemblies which are symmetrically arranged and a driving part which is fixedly connected with one transmission side; the driving piece synchronously drives the two transmission assemblies to achieve double-side clamping and fixing of the snow removal shovel, meanwhile, any one transmission assembly can be independently driven to complete releasing and fixing of single-side clamping, repeated manual disassembly with the help of tools is not needed, operation is efficient and convenient, the test preparation time is greatly saved, and the test efficiency is improved. And the potential safety hazard that the obstacle avoidance assembly rebounds to accidentally injure operators during manual operation in the prior art is avoided.

The utility model discloses a kind of hydrogen fuel cell test platforms, including platform bottom plate, the top of platform bottom plate is provided with test assembly, the side of platform bottom plate is provided with protection assembly, test assembly includes lifting frame, lifting frame is connected in the top of platform bottom plate, the top of lifting frame is connected with lifting motor, the transmission end of lifting motor is connected with lifting screw rod, the side surface of lifting screw rod is connected with lifting platform, the side of lifting platform is connected with extension rod, extension rod rotatably has bearing plate, lifting platform is provided with telescopic block for limiting bearing plate rotation, the telescopic free end of telescopic block is below bearing plate, and the upper surface of this telescopic free end can be contacted with bearing plate;The utility model does not need to use jaw to hold battery and promote, using the utility model can be suitable for battery of multiple models or sizes to carry out drop test, to reduce test preparation time, while also reduce the negative influence to the accuracy and reliability of test.

The application discloses a kind of continuous transport type semiconductor electrical test device under low temperature inert atmosphere, it is related to the technical field of electrical performance test equipment of semiconductor material, including in turn through's sample sealing cabin, test cabin and sampling sealing cabin, and the conductive conveying belt through three cabin bodies;Test cabin is equipped with liquid nitrogen inlet, inert gas inlet, vacuum valve, electrode lead-out end, irradiation window, movable baffle and probe test part. Conductive conveying belt drives sample to move continuously between three cabin bodies, realizes the automatic test and closed sampling of batch loading, low temperature or inert atmosphere of sample;Test cabin small cavity design can be quickly evacuated and cooling, reduce liquid nitrogen consumption and avoid mechanical vibration noise interference;Probe and conductive groove on conveying belt are automatically contacted, without manual wiring;The application can efficiently and accurately complete electrical performance test, such as mobility, energy spectrum and current-voltage characteristic of semiconductor material under protective atmosphere or low temperature condition.

The utility model relates to the field of testing of tire testing machines, in particular to a multi-angle obstacle strip mounting device for a tire clean test. Comprising a fixing frame, a first connecting disc, a pressing block and at least one fixing bolt. The whole fixing frame is of a [-shaped structure. The lower plate is provided with a plurality of round holes, the fixing bolts are in one-to-one correspondence with the round holes, and the fixing bolts are inserted into the round holes; the fixing bolt is sleeved with a nut, and tensioning adjustment is conducted on the fixing bolt by rotating the nut. The pressing block is detachably connected with the first connecting disc, a fixing groove for containing a barrier strip is formed in the lower surface of the pressing block, and the lower surface of the pressing block is in an arc shape. A rubber strip fixing groove is formed in the lower surface of the barrier strip and used for containing a rubber strip. According to the rotary drum punching device, the rotary drum punching link is abandoned, the manpower and material resource cost needed by rotary drum punching is saved, and damage to the integrity of the rotary drum due to punching is avoided.

The present application relates to the field of hypersonic ground test, disclose a kind of pure air regenerative heater for hypersonic wind tunnel, inner shell is equipped with heat accumulator, several heating channels and air channels are equipped on heat accumulator, several heating rods are correspondingly assembled in several heating channels, and the free space of stop sheet is all capped on several heating channels, so that temperature distribution of heat accumulator is uniform in heating process, while reducing the internal thermal stress of heat accumulator, the temperature uniformity of heated gas is increased, one end of several air channels is communicated with the air inlet of inlet end cover, the other end is communicated with the air outlet of outlet end cover, several heating channels and air channels are independent channels, high-temperature metal is closed using heat accumulator, the contact between airflow and high-temperature metal is reduced in heating process, prolongs the service life of heater. By extending into the shell and contacting with the wire through terminal post, inductive heating mode is adopted, and the working efficiency of the heater is improved.

This invention relates to the field of solid-state battery testing equipment, specifically to a solid-state battery testing device. The device includes a testing body, comprising a horizontally arranged mounting cylinder with openings at both ends. An opening is formed in the middle of the mounting cylinder, and an arc-shaped sealing cap is hinged to the opening for sealing it. A mounting bracket is located within the mounting cylinder at the arc-shaped sealing cap, and a puncture mechanism for puncturing the solid-state battery is provided at the mounting bracket. A main sliding plate and a secondary sliding plate are slidably arranged within the mounting cylinder, forming a sealed testing chamber together with the inner wall of the mounting cylinder. This invention effectively confines toxic and harmful gases such as hydrogen fluoride and carbon monoxide generated during the puncture process within the testing chamber, significantly reducing the diffusion of toxic gases into the testing environment and lowering the risk of inhalation of harmful gases by testing personnel.

The utility model belongs to test device technical field especially a circuit board testing device, aim at when carrying out salt mist test, circuit board is inconvenient to fix, the problem that horizontal placement is easy to influence back test effect, present and propose following scheme, including sealed cabinet, the cabinet mouth place of sealed cabinet one side is rotatably installed with two sealed cabinet doors, the inner wall of sealed cabinet is fixed with two horizontal poles symmetrically, be provided with the hanging component for vertical circuit board on the horizontal pole, the top of sealed cabinet inner wall is fixed with liquid injection pipe through bolt. The utility model discloses through setting up hanging component to realize circuit board vertical fixation, avoid horizontal placement back and cabinet contact to cause the salt mist deposition uneven, ensure that test surface is exposed to salt mist environment completely, improve the accuracy of corrosion evaluation, and the clamping structure of U type card frame and the setting of holding rod, facilitate the batch installation and taking out of circuit board, shorten test preparation time.