32 results about "Puncture tests" patented technology

In a prior-art nail puncture test, it has been difficult to measure the temperature at a short-circuiting portion, which is closely related to the scale of an accident which occurs. As a solution, A nail puncture test device having a temperature measurement function, a sheath thermocouple, and a fixing portion 6 of the sheath thermocouple, wherein a bottomed hole through which the sheath thermocouple is inserted is bored in the axial direction from a head portion to the vicinity of the distal end at the center part of the outer frame, and the sheath thermocouple is fixed to the outer frame by the fixing portion 6 in a state where the sheath thermocouple is inserted into the bottomed hole and the distal end thereof having a temperature measurement point is in contact with the bottom of the hole is provided.

The invention discloses an electric vehicle battery safety monitoring system, which comprises a first detection unit, a second detection unit, and a third detection unit. The first detection unit is used to carry out electrical performance tests: short-circuit test, overcharge test, and over-discharge test. The second detection unit is used to carry out mechanical performance tests: impact test, falling test, puncture test, rolling test, immersion test, and crushing test. The third detection unit is used to carry out thermal tests: high temperature test, thermal stability test, heat-free management circulating test, thermal impact circulating test, and passive propagation resistance test. The provided system solves the problems that in the prior art, the safety detection of electric vehicle battery is mainly carried out by humans, and the detection efficiency and accuracy are low. The design of the monitoring system is reasonable, the detection efficiency is high, and the detection result is accurate.

The invention relates to an integrated terminal device used for a power cable step-by-step puncture test. The integrated terminal device comprises a cable connection clamp, a high-voltage leading-out rod, a shell and a cable heating assembly, wherein the cable connection clamp comprises two clamping heads used for clamping the two ends of a cable respectively; the high-voltage leading-out rod is connected with the cable connection clamp and used for applying test voltage on the two ends of the cable; the shell is internally provided with an insulation assembly and comprises a high-voltage bushing used for containing the high-voltage leading-out rod and a metal tank used for containing the cable connection clamp and allowing the cable to penetrate through; the cable heating assembly is connected with the cable and used for heating the cable. Compared with the prior art, the mode that the cable connection clamp clamps the two ends of the cable respectively is adopted, so that a cable conductor is closed in the terminal, the equipment is simplified, and connection for heating and voltage application is convenient and reliable.

The invention relates to a special detection device for a milk bottle, and the detection device is used in a test for detecting the pull resistance and puncture performance of a nipple on the milk bottle. The detection device comprises a worktable, wherein a bevel gear I and a bevel gear II which are engaged with each other are arranged on the lower side of the worktable, the bevel gear I is horizontally arranged, the input end of the bevel gear I is connected with a torque motor, the bevel gear II is vertically arranged, and a screw rod shaft extending upwards is fixed at the gear shaft end part of the bevel gear II; a vertical guide rail is arranged on the upper side of the worktable, a horizontal lifting arm is glidingly connected to the vertical guide rail, an inner threaded hole in threaded fit with the screw rod shaft is arranged in the lifting arm, a force measurement sensor and a test head connected with the force measurement sensor are connected to the lower side of the lifting arm, the test head comprises a puncture head which is connected with the force measurement sensor through a standard threaded joint and is used in the puncture test, and a clip used for clamping the nipple in the pull-resistant test; the force measurement sensor is connected with a controller; the controller is connected with the torque motor; a special tool used for clamping the milk bottle is arranged on the worktable on the lower side of the test head.

The invention discloses a puncture testing device for a packaging material for an edge tool. The puncture testing device comprises a rack; the top part of the rack is provided with a control device and a testing device; the testing device comprises a sample support, a testing needle and a driving device, wherein the testing needle is arranged over the sample support and can vertically move, and the driving device is used for driving the testing needle to move vertically; the top part of the sample support is provided with a sample testing platform; a penetration avoiding hole is formed in the center of the surface of the sample testing platform; the central axis of the penetration avoiding hole is aligned with that of the testing needle; the surface of the sample testing platform is provided with a sample positioning structure; a sensor used for inducing a penetration force to which the testing needle is subjected is arranged between the driving device and the testing needle; and the sensor and the driving device are separately connected with the control device. The puncture testing device can meet the penetration testing requirement of the packaging material for packaging the edge tool, is high in reliability and convenient to operate.

A film structure puncture testing tool for testing the resistance to puncturing of a film structure for a product package and a method for analyzing film structures resistance to puncturing.

The invention discloses a method for detecting the texture of yellow peach crisp chips, and belongs to the field of food texture research. According to the method, a puncture test is carried out on ayellow peach crisp chip sample to obtain a sample stress-time curve, the maximum force Fm (g) and the slope G (g / s) at the maximum force are calculated and can represent the hardness and crispness ofthe yellow peach crisp chip respectively, and texture grading is carried out on the hardness and crispness of the yellow peach crisp chip through sensory scoring. The method can quickly and accuratelydetect the texture characteristics of the yellow peach crisp chips, optimizes the probe combination, and avoids the tedious, time-consuming and labor-consuming probe selection.

The invention relates to the technical field of lithium battery tests, particularly to a special fixture for a puncture test of a lithium battery diaphragm. The special fixture includes a B type solder tip and a bottom base, an upper compression ring is arranged on the bottom base, and the B type solder tip is arranged on the upper compression ring through a fixing structure; and a holder is clamped at an outer side of the bottom base, and a compression spring is connected between the holder and the fixing structure. After adoption of the abovementioned structure, the special test fixture is used in a puncture test of a diaphragm, a vertically downward motion requirement, testing of a limited range within precise height of 2mm and effective fixing of the diaphragm can be effectively and rapidly realized. At the same time, operation instability existing in a test by an inspector is reduced, test misoperation and repeatability are reduced, and accuracy of testing is achieved.

The invention relates to an anti-puncturing test machine for stab-resistant garment. The anti-puncturing test machine comprises a rack, wherein a control box and a detection device are arranged in therack; a detection support plate is arranged on the detection device; a barbed roller is arranged above the detection support plate; manual telescopic rods are arranged at two ends of the barbed roller; bottom ends of the manual telescopic rods are pivotally connected with the barbed roller; top ends of the manual telescopic rods are sleeved with a movable rod; the two ends of the movable rod areembedded in guide grooves; the guide grooves are formed in guide rails; the guide rails are fixedly connected with the rack; a metal plate is embedded in the detection support plate; an electrode of direct current on the barbed roller is different from that on the metal plate; chains are arranged in the guide grooves; gears are arranged at embedded positions of two ends of the barbed roller and the guide grooves; the gears are meshed with the chains; and the chains is driven by a motor for transmission. The invention provides the anti-puncturing test machine for stab-resistant garment, which can detect anti-puncturing performance by stabbing the stab-resistant garment from a plurality of angles.

The invention relates to an insulation cover for high-voltage cable line puncture tests and a test method. The insulation cover is installed at a high-voltage cable terminal pile head of a cable cabin and is used for isolating the cable terminal pile head from surrounding ground potential when a puncture test is performed on a high-voltage cable line. The insulation cover is L-shaped and is composed of a sleeve connection part and a lead-out part, wherein the sleeve connection part and the lead-out part are both of a cylindrical structure; a metal electric conduction body is arranged in the L-shaped insulation cover; the sleeve connection part directly sleeves the high-voltage cable terminal pile head; and the lead-out part is used for leading the cable terminal pile head from the interior of the insulation cover to the external side of the cable cabin. With the insulation cover adopted, the cable terminal pile head can be effectively isolated from the surrounding ground potential, the problems of damage to a cable body and generation of a pungent gas when a traditional method is adopted and the distance between an indoor cable terminal pile head and surrounding ground potential is insufficient can be solved.

The invention relates to an IGBT layout, in particular to an IGBT layout capable of carrying out terminal transverse puncture tests, and belongs to the technical field of IGBT devices. According to the technical scheme, the IGBT layout capable of carrying out the terminal transverse puncture tests includes a semiconductor substrate, a cellular area and a terminal area which is located at the outerring of the cellular area are arranged at the center area of the semiconductor substrate, and source electrode metal and a source electrode press welding spot which is electrically connected to the source electrode metal are arranged above the cellular area; the IGBT layout further includes an auxiliary press welding spot for leading out a terminal area base region, and the auxiliary press welding spot is located above a terminal area. The IGBT layout is compact in structure, can effectively carry out the terminal transverse puncture tests and is conducive to determining the condition that anIGBT is insufficient in pressure resistance.

The invention relates to a puncture test-used insulation cover suitable for a cable cabin embedded condition. The insulation cover comprises three individual-phase insulation covers; each phase of a three-phase cable is correspondingly provided with one individual-phase insulation cover; the individual-phase insulation covers are of cylinder-shaped structures; the external sides of the individual-phase insulation covers are provided with umbrella skirt structures used for increasing creepage distances; the individual-phase insulation covers directly sleeve high-voltage cable terminal pile heads so as to be used for shading the cable terminal pile heads and isolating the cable terminal pile heads from ground potential at the tops of the insulation covers when a puncture test is performed on a high-voltage cable line; a high-voltage lead for the puncture test is led into the inner side of each individual-phase insulation cover; and the individual-phase insulation covers sleeve corresponding cable terminal pile heads, and then the puncture test is performed. With the insulation cover adopted, the problems of damage to a cable body and generation of a pungent gas when a traditional method used for avoiding the insufficiency of the distance between indoor cable terminal pile heads and surrounding ground potential in a cable line puncture test in a novel transformer and distribution power station cabin is adopted, can be solved.

The invention relates to a rubber hammer, in particular to a multifunctional rubber hammer for the neurology department. The multifunctional rubber hammer for the neurology department can simultaneously carry out knock and puncture tests on patients, and can improve practicability. The multifunctional rubber hammer for the neurology department comprises a handle, a first fixed pulley, a puncture mechanism, a mounting frame, a knocking mechanism, a pull wire, a first slide rail and a first slide block. The mounting frame is fixedly connected to one end portion of the handle, the knocking mechanism is fixedly connected to one side portion of the mounting frame, the puncture mechanism is fixedly connected to one side portion, far away from the knocking mechanism, of the inner portion of the mounting frame, the first slide rail is fixedly connected to one side portion of the handle, and the first slide block is slidably connected with the first slide rail. The multifunctional rubber hammerachieves the effect of carrying out various nerve detections on the patients and reducing the times of a doctor to search for test tools.

The invention relates to the field of design and inspection of reinforced thermoplastic pipes (RTP) and aims at providing a method for inspecting the reinforced thermoplastic pipe based on the designed life. The method comprises the following steps of: performing bursting test on the RTP; performing puncture test on the RTP; performing tensile test on a reinforcement material of the RTP and a base body material of the RTP; obtaining a long-time burning pressure Plife of the RTP based on the designed life; and finally comparing a relation between the long-time burning pressure Plife and a designed pressure Pdesign, if Plife is greater than or equal to K'Pdesign, determining that the product is qualified. By the method, the burning pressure under long-time service life of the RTP can be forecast and inspected by short-time test, so the working procedure of performing a large amount of long-time hydrostatic test in the conventional long-time hydrostatic intensity measurement method basedon an extrapolation method, so the RTP production cost is saved, the production period is shortened, and the reliability and the product competitiveness of the RTP are enhanced.

A medical examination puncture specimen collection and fixation device solves the problems of maintaining a fixed shape in a container after specimen collection and perfusing formalin to produce splashes and volatilization to pollute the environment. Technical solution: A device for collecting and fixing medical examination puncture specimens, including a storage box, a box cover, and a specimen fixing plate. A pair of solution chamber opening control pins are provided at the bottom of the box, and a solution chamber is provided in the box cover. The storage box and the box cover There is a sealing and locking mechanism at the joint; a set of grooves are set at intervals along the width direction on the fixed plate, and the size corresponds to the puncture specimen. A set of hanging grooves are set on both sides of the length direction, and a pair of grooves are set at both ends of the plate. The mounting holes are correspondingly matched with the control pins in the storage box to form an assembly structure in which the specimen fixing plate is assembled in the storage box and sealed and engaged by the box cover. Beneficial effects: simple structure, convenient use and operation, no contact with formalin solution when collecting and making specimens, preventing its volatilization from harming medical personnel who collect and make specimens.

The invention discloses a voltage control box used for a breaker puncture test. The voltage control box comprises a voltage regulation circuit, a boosting circuit, a near-end sound and light circuit, a far-end sound and light circuit and a voltage regulation control circuit. The voltage regulation circuit is connected with the boosting circuit and the near-end sound and light circuit respectively. The voltage regulation circuit is connected with the voltage regulation control circuit through an external voltage regulation and limiting motor. Communication between the near-end sound and light circuit and the far-end sound and light circuit is carried out through a Bluetooth device. The near-end sound and light circuit is connected with the input end of the voltage regulation circuit in parallel. The voltage control box can effectively avoid potential safety hazards and personal risks of people, especially other workers not within electric connection ranges not capable of being seen by operators, surrounding the spot due to shouting negligence and lack of monitoring before manual operation. Meanwhile, the voltage control box can carry out constant-speed boosting and constant-speed step-down, thereby eliminating the limitation that operators rich in experience are needed to carry out manual operation and control in the traditional voltage control box boosting process and reducing test difficulty.

The present invention relates to the technical field of medical devices, especially to a motion control system for collection of puncture test data information. The system comprises a power supply controller, a computer, a motor drive module, an electric control displacement bench, a puncture needle, a B-mode ultrasound instrument, a B-mode ultrasound probe, a force sensor and a camera. The powersupply controller is configured to supply a power supply to the computer and the motor drive module, an output end of the computer is connected with an input end of the motor drive module, an output end of the motor drive module is connected with the electric control displacement bench, the puncture needle, the B-mode ultrasound probe and the force sensor are installed on the electric control displacement bench, the force sensor is installed at the tail portion of the puncture needle, the motor drive module is configured to drive the motion of the puncture needle and the B-mode ultrasound probe, and the force sensor, the camera and an output end of the B-mode ultrasound instrument are connected with a computer control module to transmit collected information to the computer. The motion control system is high in precision, simple in operation and high in computer automation operation degree, and can be widely applied to teaching work.

The invention discloses a voltage control box used for a breaker puncture test. The voltage control box comprises a voltage regulation circuit, a boosting circuit, a near-end sound and light circuit, a far-end sound and light circuit and a voltage regulation control circuit. The voltage regulation circuit is connected with the boosting circuit and the near-end sound and light circuit respectively. The voltage regulation circuit is connected with the voltage regulation control circuit through an external voltage regulation and limiting motor. Communication between the near-end sound and light circuit and the far-end sound and light circuit is carried out through a Bluetooth device. The near-end sound and light circuit is connected with the input end of the voltage regulation circuit in parallel. The voltage control box can effectively avoid potential safety hazards and personal risks of people, especially other workers not within electric connection ranges not capable of being seen by operators, surrounding the spot due to shouting negligence and lack of monitoring before manual operation. Meanwhile, the voltage control box can carry out constant-speed boosting and constant-speed step-down, thereby eliminating the limitation that operators rich in experience are needed to carry out manual operation and control in the traditional voltage control box boosting process and reducing test difficulty.

The invention discloses a punch for fabric puncture test, which is connected with a drop hammer of a drop hammer type impact testing machine, a rod body is arranged at the bottom end of the drop hammer, and the punch comprises a connecting base and a cutter. The connecting base is provided with a first end and a second end which are opposite in the first direction, the first end is provided with a mounting hole for mounting the rod body, and the second end is provided with a mounting groove. The cutter is provided with a cutter handle end and a puncturing end in the first direction, the cutter handle end is installed in the installation groove, and the puncturing end is provided with a sharp part. A first screw hole communicated with the mounting hole is formed in the side wall of the connecting base in the second direction, and a first screw is arranged in the first screw hole. A second screw hole communicated with the mounting groove is formed in the side wall of the connecting base in the second direction, and a second screw is arranged in the second screw hole. By means of the punch, the drop hammer type impact testing machine can be suitable for tool puncture resistance detection of fabric, and the limitation that in the prior art, a drop hammer type impact testing machine cannot conduct a puncture test is eliminated.

The invention relates to a battery, and in particular to a puncture-test flame-retardant battery. The puncture-test flame-retardant battery comprises a naked battery core and an outer-layer copper foil, wherein a metal protection layer is arranged between the naked battery core and the outer-layer copper foil, an accommodating cavity is arranged between the metal protection layer and the outer-layer copper foil, a partition bar is arranged in the accommodating cavity and is an insulation body, the inner surface of the outer-layer copper foil is provided with an insulation film, one side of the partition bar is in contact with the insulation film, the other side of the partition bar is in contact with the outer surface of the metal protection layer, one-way valves are arranged on the metal protection layer, the accommodating cavity is communicated with the naked battery core by the one-way valves, the direction of the one-way valve faces the accommodating cavity from the naked battery core, and the interior of the accommodating cavity is filled with a flame-retardant substance and a low-pressure gas with atmospheric pressure lower than one standard atmospheric pressure. The puncture-test flame-retardant battery has the advantages that the external structure of the battery can be improved, the battery deformation is avoided, a combustion-supporting gas is prevented from entering when the battery is punctured, the current increase is relieved, the heat in the battery is reduced, and the battery burning and explosion are prevented.

The invention discloses a lithium battery anode material and a preparation method thereof. The lithium battery anode material is prepared from the following main raw materials in parts by weight: 8-12 parts of polypyrrole, 20-30 parts of lithium iron phosphate, 4-10 parts of polyaniline, 1-3 parts of polyvinyl imidazol, 1-3 parts of sodium ethylenesulphonate, and 1-3 parts of N,N'-Bis(4-chlorophenyl)-N,N'-diphenyl-1,4-phenylenediamine. A prepared lithium battery achieves excellent cycle performance, and the capacity remains at above 95% after 1C charge and discharge for 2,000 cycles at a room temperature; a 6C discharge capacity is above 98% of a 1C discharge capacity; the battery doesn't catch fire or explode in a 3C / 10V overcharge test; the high-temperature cycle performance is excellent, and the capacity remains at above 93% after 1C charge and discharge for 1,000 cycles at a temperature of 60 DEG C; and good safety performance is achieved, and the battery doesn't explode or catch fire in a puncture test, an extrusion test, an overcharge test, an over-discharge test and other tests.

The invention discloses a rapid detection device for pesticide residue. The rapid detection device comprises an insertion pipe, a pushing rod and a pushing block, wherein the pushing rod is cooperatively inserted into the insertion pipe, the pushing block is cooperatively inserted into the pushing rod, a main body of the insertion pipe is columnar cylinder-structured insertion cylinder, and columnar hole-shaped detection holes are uniformly arrayed in the wall body of the insertion cylinder from top to bottom in a left-right symmetric manner; the insertion pipe is directly inserted into fruitsand vegetables, the pushing rod and the pushing block are pressed down, a puncture cone penetrates out of the detection holes and directly penetrate into pulps of the fruits and the vegetables, a reagent in a measuring cup is in direct contact with the pulps, and after the pushing block rebounds, the tested reagent is brought back to the measuring cup, so that a testing result is directly observed, the testing process is relatively rapid, and the testing efficiency is improved; and a measuring block I penetrates out of the detection holes at different height positions from two sides of a guide column I, the puncture testing is carried out on the pulps at different depth positions under the skins of the fruits, and the pesticide residue conditions at different depth positions in the fruitsand the vegetables can be relatively accurately measured by the whole device.

The invention discloses doll pendant production equipment with a puncture test function, and relates to the technical field of ornament processing and detection, in particular to a base, a trapezoidal clamping plate, an adjustable puncture test mechanism, a turbine turning mechanism and a quick dismounting and replacing mechanism, a conveying rail is arranged at the top end of the base, and guide wheels are arranged at the surface end of the trapezoidal clamping plate; according to the doll pendant production equipment with the puncture test function, through the arrangement of the adjustable puncture test mechanism, the guide rails arranged on the frames on the two sides of the adjustable puncture test mechanism and the through groove formed in the middle end of the adjustable puncture test mechanism, accurate guidance is provided for a directional puncture experiment of a turbine steering mechanism, a mounting and moving space is provided for the turbine turning mechanism, and the resource integration rate is increased; the adjustable puncture test mechanism achieves the purpose of changing the longitudinal stroke of the turbine steering mechanism connected with the connecting rod by changing the position of the sliding pin at the bottom end of the lead screw track, more variables are created for a puncture experiment of pea pod doll pendant materials, and the reliability of an experiment result is improved.

A film structure puncture testing tool for testing the resistance to puncturing of a film structure for a product package and a method for analyzing film structures resistance to puncturing.

The invention relates to the field of detection, and provides a waterproof roll anti-puncture testing device which comprises an execution part, the execution part comprises a puncture assembly and a testing table, the testing table is used for fixing a sample piece of a waterproof roll, the puncture assembly is used for executing a puncture action on the sample piece, and at least one of the puncture assembly and the testing table is provided with a force sensor; the force sensor is used for measuring the interaction force between the puncture assembly and the measuring table in the puncture action execution process of the puncture assembly; the control part comprises a power source, a controller and a driver, the power source is used for supplying power to the controller and the driver, the driver is used for providing driving force for the puncture assembly to execute the puncture action, and the controller is used for controlling the working state of the driver; and the execution part and the control part are integrally mounted. According to the technical scheme provided by the invention, the puncture resistance of the waterproof coiled material can be instantly and efficiently tested on the construction site.

The invention relates to a special detection device for a feeding bottle used for testing the pulling resistance performance test and the puncture performance test of a pacifier on a feeding bottle. It is installed horizontally and the input end is connected to the torque motor. The second bevel gear is arranged vertically. The end of the gear shaft of the second bevel gear is fixed with an upwardly extending screw shaft; the upper side of the workbench is provided with a vertical guide rail, which slides Connect the lifting arm with a horizontal setting. There is an internal threaded hole in the lifting arm that matches the thread of the screw shaft. The lower side of the lifting arm is connected with a side force transmission sense and a test head connected to the load cell. The test head includes a load cell that passes the standard. The threaded joint used to connect the piercing head for the puncture test and the clip for clamping the teat for the tensile test, the load cell is connected to the controller, the controller is connected to the torque motor, and the lower side of the test head There is a special tooling for clamping feeding bottles on the working table.

The invention provides a safety helmet quality detection system and detection method based on time-domain transient analysis. The detection system comprises a main control module, a pressure signal acquisition and conversion module, an A / D converter, a memory and a liquid crystal display screen. The detection method is characterized in that, by recording force values of all force process, and carrying out differential algorithm analysis on stress waveform thereof, a slope change process of the whole waveform is obtained, and if the slope change value is large, there is a sudden change in the force value, so that products, which seem qualified but are actually not qualified, are analyzed. According to the scheme, in the process of safety helmet puncture test, rapid and accurate detection and judgment can be realized, misdiagnosis can be prevented, and waveform and judgment parameters are displayed visually on a liquid crystal screen; and the detection method is stable and reliable and high in accuracy, overcomes limit of traditional thinking and has a wide popularization and practical value.

The invention discloses a puncture test device and a puncture test method. The device comprises a rack fixedly mounted on one side of a pit, and a winding machine; a sandpit used for placing an experimental device is formed in the pit; a lifting device is arranged on the sandpit; the lifting device penetrates through a guide wheel set installed at the top end of the rack through a steel wire andis connected with the winding machine; a breakable puncture mechanism is installed at the end of the lifting device, and the puncture mechanism is located over the experimental device; a detection device for detecting the lifting distance of the puncture mechanism is arranged on the lifting device; the device for simulating aircraft crash to receive puncture impact is arranged; after the experimental device is arranged in the sandpit and the pit, the lifting device with the preset height is controlled to lift the puncture mechanism to carry out free falling motion; a puncture simulation experiment is conducted on the experimental device; and therefore the puncture experiment can be safely and reliably conducted in an experiment laboratory, and data are real and effective.

The invention discloses a qualitative analysis method for unknown gas decomposition components of environment-friendly insulating medium. The qualitative analysis method comprises the following steps:step 1, decomposition paths of C6F12O molecules are established; step 2, the energies required by the C-C bond breakage of the C6F12O molecules are respectively calculated; step 3, the energies required by the bond breakage of free radicals CF3, C2F5 and C3F7 in free radical reaction for generating F atoms or atomic bonds which are used for forming stable fluorocarbons CF4, C2F6, C3F8, C3F6, C4F10 and C5F12 are respectively calculated; step 4, standard gas is selected based on decomposition gases which are obtained in steps 1-3; and step 5, a gas insulating performance test platform is utilized for carrying out puncture test to the mixed gas of C6F120 and CO2 and analyzing the decomposition components. The invention solves the technical problems in the prior art that the gas decompositioncomponents of the environment-friendly insulating medium C6F120 are effectively analyzed after puncture; the basis for the tracking detection in subsequent hidden faults can not be provided; and thelike.

The invention relates to a safety helmet impact puncture resistance testing device, and belongs to the field of safety helmet testing equipment. The device comprises a box frame; a cover plate is fixed at the top of the box frame; an electromagnet is fixedly arranged on the side wall, facing the interior of the box frame, of the cover plate; an impact hammer is adsorbed on the electromagnet; a bottom plate is fixed at the bottom of the box frame; the bottom plate is horizontally arranged; a guide rail plate is arranged on the box frame; the guide rail plate is arranged uprightly; a mechanical sensor is arranged on the top face of the bottom plate in a sliding mode, the mechanical sensor horizontally slides in the direction of the connecting line of the center of the bottom plate and the guide rail plate; a head mold is fixedly arranged on the mechanical sensor; the bottom of the guide rail plate is hinged to the bottom of the box frame; a hinge shaft is horizontally arranged; the guide rail plate is in a horizontal state after rotating by 90 degrees with the hinge shaft as a rotating shaft, and at the moment, the top surface of the guide rail plate is flush with the top surface of the bottom plate, and the mechanical sensor slides on the guide rail plate and the bottom plate. According to the device, the test scene of a safety helmet is improved, and the test result of the safety helmet is more real.