1300 results about "Impact testing" patented technology

The invention discloses a valve vibration impact test method and system based on digital twinning, and belongs to the technical field of industrial equipment test and evaluation. The method comprises the following steps: firstly, deploying a multi-source sensor network, constructing a physical entity layer of a valve vibration impact test, collecting and preprocessing various physical monitoring data, and constructing a digital twinborn body layer; secondly, real-time data assimilation with a physical test bed is realized through parameter calibration and updating of a digital twinborn model based on various physical monitoring data and the digital twinborn layer; and finally, executing a virtual vibration impact test, realizing prediction and evaluation of global response and key part information of the physical entity according to a test result, and finally realizing interaction and performance prediction. And the valve vibration impact test is realized through the valve vibration impact test system. According to the method, the fault diagnosis capability, the early damage identification capability and the valve state prediction and evaluation capability can be remarkably improved, and the defect of insufficient field monitoring information is overcome.

This invention relates to the field of battery testing technology and discloses an ice-water impact testing system, comprising: a temperature control unit for regulating the temperature of the testing environment, the temperature control unit including a liquid nitrogen cooling device and an electric heating device, and using a PID algorithm to regulate temperature fluctuations within ±0.5℃; an impact unit for simulating water flow impact and mechanical vibration of battery samples during testing, the impact unit including a high-pressure water pump and a mechanical vibration device, capable of adjusting water flow pressure and vibration acceleration; and a data acquisition and analysis module for real-time acquisition of temperature, humidity, pressure, and battery voltage data during the testing process, and evaluating battery performance through intelligent analysis algorithms. By combining the liquid nitrogen cooling device and the electric heating device, and employing a PID control algorithm, precise adjustment of the temperature control unit is achieved, enabling rapid temperature switching within the range of -40℃ to 80℃, while maintaining temperature fluctuations within ±0.5℃.

The invention relates to the field of detection, in particular to a glass fiber asphalt shingle quality detection device. Traditional detection equipment has significant limitations which are mainly embodied in that only impact at a single position can be simulated or randomness is lacked, and diversified impact conditions possibly encountered by asphalt shingles in actual use cannot be accurately reflected. The glass fiber asphalt shingle quality detection device comprises a shell, and a frame body and the like are arranged in the shell; the frame body is of an open structure, and a placing frame is arranged in the frame body in a sliding mode. According to the invention, the two electric push rods drive the lifting frame, the two push blocks and the two transverse shafts to move synchronously, so that the knocking block can carry out repeated impact test on the asphalt shingle body, and the continuity and consistency of the test are ensured; not only is the efficiency of the knocking test improved, but also the flexibility of force adjustment in the detection process is improved, and the impact resistance requirements of different asphalt shingle bodies can be met; through multiple impact tests, the quality evaluation of the asphalt shingle can be ensured to be more comprehensive and accurate.

The invention relates to the technical field of electric bicycle frame testing, and discloses an electric bicycle frame bearing capacity testing device which is used for testing the bearing capacity of an electric bicycle frame. Comprising an equipment base, a supporting frame arranged above the equipment base, an arc-shaped overturning assembly, a supporting overturning mechanism, a movable downward pressing assembly sliding on the top of the supporting frame, and a control host arranged on one side of the equipment base. A connecting block extends out of the telescopic cylinder in the vertical direction of the connecting groove to be connected with the rotating square block, and the clamping column is moved in the clamping groove to be limited and fixed; when a front end impact resistance test needs to be carried out on the vehicle frame, the connecting block extends out of the telescopic cylinder in the horizontal direction of the connecting groove and is connected with the rotating square block, so that the vehicle frame can be connected with devices with different functions, the vehicle frame can be tested at different angles and postures, and the accuracy and reliability of a test result are improved.

The invention relates to the technical field of pipe detection, in particular to a drop hammer type impact testing machine for building material detection and a testing method.The drop hammer type impact testing machine comprises a containing box, a lifting rotating handle is rotationally connected to the interior of the containing box, a winding rod is connected to one end of the lifting rotating handle in a meshed mode, and a bottom rotating set is movably connected to the bottom of the winding rod; and the surface of the winding rod is in threaded connection with a lifting plate. According to the drop hammer type impact testing machine for building material detection and the testing method, through a movable long rod in a hammer rod of a hammer body, when a collision block at the bottom of a hammer head collides with a pipe, the movable long rod can stretch out and draw back into a hollow part, the stiffness hardness of a rope is increased, and the shaking degree of the hammer body is reduced; a mechanical structure for preventing secondary impact enhances the maintenance and long-term use standard of equipment, and an air suction net rod of the hammer head can form an air suction structure along with impact to correspondingly adsorb fragments and reduce diffusion.

The invention discloses an impact resistance testing device and method for carton production, and relates to the technical field of impact testing devices.The impact resistance testing device comprises a baffle, four supporting frames and sliding rods are arranged at the upper end of the baffle, a top cover is arranged at the upper ends of the four supporting frames, and a transmission chain is arranged between the top cover and the baffle; a carton is arranged in the middle of the upper end of the baffle, a pressure applying mechanism for carrying out impact test on the carton is arranged among the four transmission chains, and an impact mechanism for changing the impact area to carry out impact resistance test on the carton is arranged in the pressure applying mechanism. According to the invention, a plurality of impact testing methods are provided through cooperation of the pressure applying mechanism and the impact mechanism to simulate various pressures and impacts possibly encountered in the actual transportation and storage process of the carton, so that the pressure resistance and the impact resistance of the carton can be evaluated more accurately; and the transmission chain controls the pressing force of the pressing mechanism, so that the bearing capacity of the carton can be quantified, and the deformation degree and the limit value of the carton under different pressures are determined.

The invention provides a mechanical in-situ test experimental device with a multi-working-condition simulation coupling effect, and belongs to the field of mechanical testing. The problems that an existing mechanical property testing device can only simulate single environment characteristics and cannot test various mechanical properties are solved. Wherein the linear sliding table is connected with the mobile platform through the mounting bracket, the upper end of the connecting rod is fixedly connected to the mobile platform, and the lower end is positioned in the box body; any one of one of the stretching and fatigue experiment clamp, the bearing platform and the bending pressing table can be mounted on a bottom plate of the box body, and any one of the other stretching and fatigue experiment clamp, the compression pressing head, the hardness measuring head, the bending pressing head and the impact testing head assembly can be mounted at the lower end of the connecting rod; the environment simulation assembly can simulate the temperature, humidity and salt mist environment of actual working conditions in the box body; the in-situ monitoring assembly can be used for monitoring the to-be-tested sample in the box body in real time. The device can simultaneously simulate a plurality of actual working conditions and coupling working conditions of actual loads, and can complete a plurality of mechanical property tests.

The embodiment of the invention provides an airplane windshield glass service reliability test method and system and a medium, and the method comprises the steps: carrying out the coupling simulation of a test environment based on a plurality of environmental factors, and building a plurality of environmental factor cooperative control test modes; performing an impact test on the aircraft windshield based on the collaborative test mode to generate damage monitoring data; analyzing the damage monitoring data based on the damage mechanical model, and generating damage acceleration state data; inputting the damage monitoring data and the damage acceleration state data into a life prediction model, and outputting residual life prediction data; analyzing the damage acceleration state data and the residual life prediction data based on the reliability standard information to obtain a reliability test result, and transmitting the reliability test result to the terminal in real time; the mode testing environment is carried out through multiple environmental factors, so that impact testing of different environments is carried out on the aircraft windshield glass, the testing diversity is improved, damage monitoring is carried out on the glass, and the reliability testing precision of the glass is improved.

The invention relates to automobile part testing, and relates to the technical field of an automobile door limiter durability testing device, and the device comprises an adjusting mechanism which comprises a first motor, a first rotating disc, a first sliding groove, a threaded rod, a first piston rod, a first sliding block, a second rotating disc, a second sliding groove and a sliding rod. Through cooperation of structures such as the second rotating disc and the arc-shaped plate, simulation testing of the vehicle door limiter is facilitated, the first motor is started to enable the second rotating disc to rotate continuously through transmission, the arc-shaped plate drives the cantilever to swing in a reciprocating mode, and the state of the limiter during door opening and closing is simulated; the durability cycle test, the motion precision verification and the instantaneous impact load evaluation of the vehicle door limiter are realized, the test automation degree and the simulation precision are improved, the negative pressure generates variable damping force, simulates air resistance, spring pre-tightening force and door closing impact, the durability of the limiter under real stress is tested, and the test effect of the device is improved.

The invention relates to the technical field of battery safety testing, in particular to a new energy lithium battery impact testing device which comprises a testing table and a supporting column, the supporting column is fixedly connected to the lower surface of the testing table, a shell is fixedly connected to the upper surface of the testing table, and speed adjusting mechanisms are arranged on the two opposite outer walls of the shell. Butt joint mechanisms are arranged on the two opposite sides of the upper surface of the test board, a firing pin and a collision block are arranged on the two sides of the top of an inner cavity of the shell, a rotating cover is slidably connected to one end of the upper surface of the test board, and a linkage mechanism is arranged in the test board. According to the new energy lithium battery impact test device, tested batteries can be divided into columnar lithium batteries and cuboid lithium batteries, the columnar lithium batteries and the cuboid lithium batteries can be clamped, if impact test types need to be replaced, the impact test types can be replaced through a linkage mechanism, the automation degree is high, and the test efficiency is high. Technicians do not need to manually replace collision objects, and manpower and time are saved.

The utility model discloses a coating impact testing device, which belongs to the field of thermosetting powder coating performance testing, and comprises a bottom plate, limiting mechanisms arranged at the top of the bottom plate, an adjusting mechanism arranged between the limiting mechanisms, an impact mechanism arranged at the top of the adjusting mechanism, a marking mechanism arranged at the top of the impact hammer, and a marking mechanism arranged at the bottom of the marking mechanism. The marking mechanism comprises a material storage box, the bottom of the material storage box is connected with a discharging pipe, the discharging pipe is an elastic pipe, and a stirring assembly is arranged in the material storage box. The device has the beneficial effects that a marking mechanism is arranged, marking pigment in a storage box is conveyed to the bottom of an impact hammer through a discharging pipe, so that an impact site can be marked when the impact hammer impacts a coating, and a place with unobvious deformation can be conveniently observed; and the stirring rod is arranged in the storage box, the stirring rod is driven by the rotating shaft to rotate, the pigment in the storage box is mixed, and layering or solidification of the pigment is avoided.

The invention discloses a chip cold and hot impact testing device and a testing method thereof, relates to the technical field of chip performance detection, and solves the problems that in the prior art, chips cannot be subjected to comprehensive and uniform cold and hot impact due to the fact that the chips are partially covered by a clamp, and the temperature of each chip is difficult to keep consistent when the chips are subjected to batch testing, so that the testing efficiency is improved. Therefore, the technical problem is solved. Comprising a testing cylinder used for providing cold and hot temperatures, a moving part is arranged in the testing cylinder, and a clamping mechanism used for dynamically clamping a chip body is arranged on the moving part; the clamping mechanism comprises a plurality of mounting seats, a first clamping mechanism, a second clamping mechanism and a linkage mechanism; and the mounting seats are uniformly distributed on the moving part. According to the chip testing device, the chips can be dynamically clamped conveniently, so that the chips can be comprehensively and uniformly subjected to hot and cold impact testing, and the temperature of each chip cannot have a large temperature difference when the chips are subjected to batch testing, so that the testing effect can be improved.

The utility model discloses a plastic film pendulum bob type impact testing machine which is characterized in that the plastic film pendulum bob type impact testing machine comprises a base, a plurality of supporting rods are arranged on the base, the supporting rods are all connected with the same driving part, lifting parts are arranged in the supporting rods, the driving part is connected with the lifting parts, and the lifting parts are arranged on the base. The driving part comprises a pendulum bob mechanism rotationally connected to the driving part around a rotating shaft and an electromagnet located at the same horizontal position with the rotating shaft, a fixing device used for fixing a film is arranged on one side of the supporting rod and comprises a lifting device, a control device is arranged below the base, and the control device is connected with the rotating shaft. The utility model has the advantages that the lifting devices are arranged on the driving part and the fixing device, so that the highest point of the pendulum bob and the height position of the fixing part are adjustable, and the impact force of the punch is improved by utilizing the conversion of gravitational potential energy.

The invention belongs to the technical field of photovoltaic panel detection equipment, and particularly relates to photovoltaic panel impact resistance detection equipment which comprises a plurality of detection frames, and turnover mechanisms and displacement mechanisms are arranged in the detection frames; a top cover is arranged at the top of the detection frame, an operation box is installed between the outer walls of the detection frame, an ice hockey storage box is arranged on the outer wall of the top cover, and a limiting piece is arranged on the inner wall of the detection frame. The effect of changing the motion trail of the ice hockey transmitter is achieved by changing the rotating speed of the longitudinal gear, teeth of the second speed change gear are meshed with teeth of the first speed change gear, the circumference of the second speed change gear and the circumference of the first speed change gear differ greatly, and therefore the rotating speed of the first speed change gear is different from that of the second speed change gear. When the first change gear rotates for one circle, the second change gear already rotates for many circles, and the ice hockey transmitter is controlled to move, the transverse moving speed and the longitudinal moving speed are different, and the movement track of the ice hockey transmitter changes accordingly, so that the randomness of the ice hockey transmitting position is improved.

The utility model discloses a cantilever beam impact testing machine, and relates to the technical field of testing machines. The cantilever beam impact testing machine comprises a testing machine base, a cantilever beam body is fixedly connected to the testing machine base, an electric push rod is arranged on the cantilever beam body, an impact head is arranged at the output end of the electric push rod, and a positioning mechanism used for limiting a test sample is arranged above the testing machine base. The positioning mechanism comprises a positioning seat fixedly connected to the testing machine base, and the positioning seat is provided with a clamping assembly and an impact positioning assembly. According to the cantilever beam impact testing machine, through the design of the positioning mechanism, during operation, the position of the impact positioning assembly is firstly adjusted, so that the impact width position of a test sample is quickly clamped to form positioning, then the test sample is clamped and positioned by utilizing the clamping assembly, and the toughness of the test sample is quickly tested; the test sample can be conveniently and quickly positioned, and the operation process is time-saving and labor-saving.

The invention relates to a test bench for an impact test of a superelastic shape memory alloy (SMA) wire and a damper thereof, and aims to comprehensively evaluate the superelastic characteristic of the SMA wire under a dynamic impact load and the vibration reduction performance of the damper thereof. The test bed is mainly composed of an upper bottom plate, a shape memory alloy (SMA) wire clamping test unit, a main body frame unit, a steel wire rope, a pull rope displacement sensor, a lower bottom plate, an optical axis supporting seat, a lead screw sliding table, an adsorption release and stress application unit, an optical axis, an impact stress unit, an anti-collision plate and supporting foot cups. By adjusting the weight and the position of the weight disc and the compression amount of the stress application spring, the test bench can realize loading of different impact energy at different heights so as to simulate actual working conditions. Meanwhile, various sensors arranged on the test bench can capture impact force, displacement, resistance and deformation data in real time, and subsequent analysis and processing are facilitated. The test bench is suitable for the performance test in scientific research and engineering application of the shape memory alloy (SMA) wire and the damper thereof.

The utility model discloses an impact resistance test device for ship sealing rubber parts, which relates to the field of rubber impact detection, including a base, a bracket fixedly connected to the top of the base, an impact detection mechanism arranged on the bracket, the impact detection mechanism including an impact rod, guide rods fixedly connected to both sides of the impact rod, the guide rods slidingly connected to the bracket along the vertical direction, a top plate fixedly connected to the top of the guide rod, a pressure-bearing inclined block fixedly connected to the bottom of the top plate, an elastic mechanism for driving the guide rod to impact downwards arranged on the bracket, and a power mechanism for driving the pressure-bearing inclined block to move upwards arranged on the top of the bracket. The impact detection mechanism is driven to move upwards by the power mechanism, and the impact detection mechanism is actively moved downwards by the elastic mechanism, so that the impact rod can be reciprocated up and down to realize the impact resistance test of the rubber parts, the operation is simple and quick, the use is more convenient, single impact test and continuous impact test can be realized, and the practicality is higher.

The invention discloses an aviation main shaft tester for applying an impact load and a continuous centrifugal load and a centrifugal loading method for simulating an engine bearing test in a blade falling state, and relates to the technical field of impact tests. The problems that an existing aviation main shaft bearing testing device can only apply stable loads and cannot apply impact loads and centrifugal loads at the same time are solved. One end of a spindle is connected with a spindle motor driving shaft through a flexible coupler, the spindle is rotationally connected with a base through a first accompanying test bearing and a tested bearing, a centrifugal loading unit is located on the side, close to the spindle motor, of the tested bearing, a permanent magnet is installed at the upper end of a straight rod, a coil assembly and the permanent magnet are arranged correspondingly, and the lower end of the straight rod is connected with a thrust block. The slopes on the two sides of the thrust block make contact with the two centrifugal blocks correspondingly, and the two centrifugal blocks are connected with the main shaft through the two compression springs correspondingly. The method is used for evaluating the reliability of the engine main shaft bearing which bears the instantaneous impact load and the continuous centrifugal load in the simulated rotor blade falling state.

The invention discloses a rotator cuff injury impact test method based on sensor data analysis, and relates to the technical field of intelligent medical equipment, and the method comprises the steps: inputting a joint contracture data set into a generative adversarial network model, carrying out pressure propagation mode analysis through a three-dimensional convolution layer, carrying out energy hot spot aggregation through an attention mechanism layer, and carrying out pressure propagation mode analysis through a three-dimensional convolution layer; the method comprises the following steps: generating a pressure field comprehensive vector of a contracture joint, extracting gradient amplitude and energy density characteristics in the pressure field comprehensive vector, performing neighborhood smoothing through Gaussian average filtering, obtaining an acoustic impedance value matrix, synchronously performing spatial continuous mapping, obtaining an acoustic impedance distribution diagram, and obtaining an acoustic impedance value of the contracture joint according to the acoustic impedance distribution diagram. And performing dynamic compensation on the pressure field comprehensive vector through an acoustic transmission equation to obtain a corrected pressure field comprehensive vector, and converting the corrected pressure field comprehensive vector into an impact control signal through a PID (Proportion Integration Differentiation) controller. According to the invention, through the generative adversarial network model and the PID controller, the multi-physical field data of the joint contracture area can be integrated, and the frequency and pulse width of the shock wave therapeutic apparatus can be adjusted.

The invention relates to the technical field of mechanical environment test measurement equipment, and particularly discloses a horizontal impact testing machine and a testing method. The testing machine comprises a base, a working table assembly, a tailstock assembly and a hammer head assembly, the base is provided with a driving assembly, a guiding unit, a table top limiting assembly and a tailstock limiting assembly which are arranged at intervals in the working direction. The working table top assembly is movably connected to the table top limiting assembly and can reciprocate in the working direction relative to the table top limiting assembly, and a positive wave generating unit is arranged on the working table top assembly; the tailstock assembly is movably connected to the tailstock limiting assembly, the tailstock limiting assembly selectively fixes the tailstock assembly, and a negative wave generating unit is arranged on the tailstock assembly; the hammerhead assembly is slidably arranged on the guide unit, and the driving assembly is used for pushing the hammerhead assembly to impact the positive wave generation unit so as to drive the working table assembly to impact the negative wave generation unit. The testing machine is used for carrying out a simulation test according to the requirements of a double-wave impact test, so as to complete the detection, evaluation and verification of a to-be-tested product.

The invention discloses a drop impact resistance testing device, which relates to the technical field of impact testing devices and is technically characterized by comprising an electric sliding rail, a temperature and humidity simulation structure is arranged at the top end of the electric sliding rail, and a ground simulation structure is arranged at the bottom end of the electric sliding rail. The temperature and humidity simulation structure comprises a three-fork fixing frame fixedly installed at the top end of the electric sliding rail, a hydraulic cylinder is fixedly installed on the three-fork fixing frame, and a first pressure sensor is fixedly installed at the output end of the hydraulic cylinder. Closed-loop temperature control is constructed through the double-layer simulation box, a thermoelectric semiconductor and an atomizer, and the marine transportation high-humidity, cold-chain low-temperature and high-temperature environment is simulated; a hydraulic cylinder is combined to drive a hollow pressing plate to restore stacking pressure, and the pressed softening state of the carton is monitored in real time. Meanwhile, the ground simulation structure restores falling impact of various landing scenes such as cold chains, sea transportation and trucks. A real transportation scene is simulated in the whole process, and the accuracy and comprehensiveness of carton impact resistance evaluation are remarkably improved.

The invention belongs to the technical field of testing, not only can simply detect the impact resistance of a floor, but also can detect the collapse value of an impact point, even can quickly impact different areas for multiple times, and particularly relates to an impact resistance detection device for an anti-static movable floor and a working method thereof. Comprising an impact test rack, an impact implementation assembly, a multiple detection assembly and an intelligent comprehensive impact resistance test system. The lifting height of the impact heavy hammer is controlled by shaking the hand-cranking wheel, the pulling and clamping mechanism is pulled to release the impact heavy hammer, the operation is simple and rapid, multiple impact and multiple detection assemblies provide more test options, more complex impact resistance test can be carried out, and the test efficiency is improved. Deformation displacement and collapse values in the vertical and horizontal directions after the test board is impacted can be accurately measured, a scientific basis is provided for evaluating the impact resistance of a material, and a remote monitoring and operating system allows an operator to monitor and control the test process beyond a safe distance.

The utility model discloses a plastic impact testing machine, which structurally comprises an upper top cover, a support frame, a guide shaft, a replacement door, a rubber pad, a placement table, a fixed base, a driver, an impact hammer body mechanism and an adjusting replacer, and the lower end of the upper top cover is welded with the upper end of the support frame. Structurally, the guide shaft is connected with the sliding rail groove frame arranged in the outer side of the hammer body shell for lifting and positioning, and a rolling bearing is arranged in the sliding rail groove frame, so that the movement process is smoother, and the unnecessary jamming phenomenon is avoided; furthermore, a connecting shaft is mounted in the hammer body shell, so that the weight of the counterweight thallium can be conveniently replaced and adjusted through a replacement door, and the counterweight thallium can be disassembled and changed more quickly in the impact test process of different bearing forces of different plastic parts according to needs and is fixed through a fixing shaft bolt; and the sliding wheels arranged on the inner sides of the limiting blocks can provide a smoother process in the disassembly, assembly and replacement processes.

The invention discloses an impact resistance test device and method for an energy-absorbing anti-collision structural member, and relates to the technical field of automobile anti-collision members. Comprising a support, a drop hammer mechanism arranged on the support and capable of sliding in the Z direction, a clamp arranged at the bottom of the support and used for clamping a test piece, and a force value sensor arranged below the clamp and used for collecting impact force borne by the test piece. The first displacement detection component is arranged above the test piece and can be used for measuring the concave depth of the upper surface of the test piece, the second displacement detection component is arranged between the test piece and the force value sensor and is used for measuring the convex height of the lower surface of the test piece, and the first displacement detection component can move in the X direction and the Y direction. The first displacement detection component can measure the concave depth of the upper surface of the sample in a multi-point mode, the second displacement detection component can measure the protruding height of the lower surface of the sample, it is ensured that the initial error can be accurately deducted from the displacement variation after impact, and the measurement precision of the upper and lower surface deformation of the sample is improved.

The invention discloses an electromagnetic ejection type impact testing machine device and a testing method, and belongs to the technical field of impact testing. The problem that when an existing impact testing machine needs a high impact speed, the device also needs a large acceleration distance is solved. The first electromagnetic main track and the second electromagnetic main track are fixedly connected to the track support in the length direction, the two electromagnetic auxiliary tracks are fixedly connected to the portions, on the two sides of the first electromagnetic main track, of the track support respectively, and the two electromagnetic auxiliary tracks, the first electromagnetic main track and the second electromagnetic main track each comprise two parallel linear tracks. The linear track is formed by arranging a plurality of stators in the length direction, and each stator is wound with an electromagnetic coil. According to the invention, through the electromagnetic track acceleration device, a large impact speed can be obtained in a small acceleration distance, the automation degree of an impact test is improved to a great extent, and flexible adjustment and accurate control of impact gears are realized.

The invention belongs to the technical field of sports equipment detection, and particularly relates to an impact test device for sports equipment detection. The detection bench is fixedly connected with a pair of symmetrically distributed support blocks. A placement plate is arranged at the top ends of the pair of supporting blocks, and the overlook surface of the placement plate is in a concentric-square shape; a limiting mechanism is arranged on the detection table, and the limiting mechanism is used for limiting the basketball board placed on the placing plate; an inverted-L-shaped fixing plate is fixedly connected to the side wall of the detection table, and a first vortex-shaped column is fixedly connected to the vertical face of the inverted-L-shaped fixing plate through a fixed connecting plate. A second vortex-shaped column is fixedly connected to the bottom face of a horizontal plate of the inverted-L-shaped fixing plate, the first vortex-shaped column and the second vortex-shaped column are the same in size, and the second vortex-shaped column is located over the first vortex-shaped column. Vortex-shaped grooves are formed in the inner arc-shaped surfaces and the outer arc-shaped surfaces of the first vortex-shaped column and the second vortex-shaped column; the problems that an existing device is incomplete in detection and too single in detection impact position are solved.

The utility model discloses an impact testing machine for hub detection, which comprises a workbench and an impact assembly, a support is fixedly mounted at the top of the workbench, the impact assembly comprises a magnetic attraction seat, a guide plate, a guide rod, a mounting plate, a bidirectional screw rod, a fixing rod, a knob, an impact hammer and a fixing plate, and an electric telescopic rod is mounted in the middle of the top of the support. The bottom of the electric telescopic rod penetrates through the support and is fixedly provided with a connecting plate. The two-way lead screw is driven to rotate by screwing the rotary knob clockwise and anticlockwise, then the fixing rods on the two sides can be driven to move towards the outer side at the same time, fixing of the fixing plate is lost, the impact hammer can be conveniently taken down, the impact hammer can be conveniently replaced, and when the impact hammer is installed, the fixing plate is placed in the groove body, so that the impact hammer is installed conveniently. The fixing holes are aligned with the fixing rods, then the knob can be screwed anticlockwise, the fixing rods are driven to move towards the inner side at the same time, and the impact hammer is installed.

The invention discloses a damage identification method and system for a composite material fiber braid layer under a dynamic impact loading condition, and the method comprises the steps: preparing a sample piece with a specific fiber braid layer according to a to-be-monitored composite material structure; applying dynamic impact loading to the sample piece by adopting an impact testing machine at preset impact energy and frequency; in the dynamic impact loading process, a high-sensitivity acoustic emission sensor array is used for monitoring a sample piece, and acoustic emission signals are collected in real time; the collected acoustic emission signals are preprocessed; performing time-frequency feature extraction on the preprocessed acoustic emission signal; and obtaining a damage identification index D based on the extracted time-frequency features. Compared with the prior art, the method not only comprehensively considers multiple factors and performs dynamic response analysis, noise suppression and signal extraction, but also has a time-frequency feature extraction capability and has good applicability and flexibility.

The invention relates to the field of cantilever beam impact testing machines, in particular to a cantilever beam impact testing machine for raw materials for battery jar production, which comprises a buffer mechanism used for buffering and stopping limiting treatment of cantilever beam impact; the impact mechanism is used for carrying out impact resistance detection treatment on the stainless steel or polypropylene material; the clamping mechanism is used for clamping the stainless steel or polypropylene material; according to the cantilever beam impact testing machine for the raw materials for battery jar production, when a side pendulum bob and an impact hammer carry out impact resistance detection on stainless steel or polypropylene materials, if the materials are damaged, the side pendulum bob and the impact hammer continuously swing forwards due to inertia, and the impact resistance of the materials is greatly improved. And then the extending buffer plate can prevent the side pendulum bob and the impact hammer from swinging forwards, so that the effect of reducing the inertia residual force of the side pendulum bob and the impact hammer to the minimum is achieved.

The embodiment of the invention provides drop hammer impact test equipment and a control method and device thereof. The drop hammer impact test equipment comprises a test platform and a drop hammer impact assembly, the drop hammer impact assembly comprises a drop hammer body and a drop hammer ball head, the drop hammer body is arranged on the at least one pair of stand columns in a sliding mode, and the drop hammer ball head is arranged on the lower surface of the drop hammer body and used for impacting a test piece; the telescopic assembly is horizontally arranged in the hollow structure of the drop hammer body; the telescopic assembly is configured to retract towards the center of the drop hammer body in the horizontal direction, so that the drop hammer impact assembly slides up and down in the vertical direction; and the telescopic assembly is configured to extend towards the stand column in the horizontal direction and be clamped with the stand column, so that the drop hammer impact assembly is fixed above the test supporting pedestal. According to the drop hammer impact test equipment and the control method and the control device thereof, the test efficiency of a drop hammer test can be improved.