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309 results about "Drop tests" patented technology
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A drop test is a test designed to examine the structural integrity of a product. Drop tests usually involve an object being dropped from a predefined height onto a second object or surface.
Disposable wearable absorbent articles with anchoring systems
Owner:PROCTER & GAMBLE CO
Multilayer printed wiring board and manufacturing method of the multilayer printed wiring board
ActiveUS20060102384A1Improve buffering effectMore reliabilitySemiconductor/solid-state device detailsSolid-state devicesElectricityDrop tests
This invention provides a multilayer printed wiring board in which electric connectivity and functionality are obtained by improving reliability and particularly, reliability to the drop test can be improved. No corrosion resistant layer is formed on a solder pad 60B on which a component is to be mounted so as to obtain flexibility. Thus, if an impact is received from outside when a related product is dropped, the impact can be buffered so as to protect any mounted component from being removed. On the other hand, land 60A in which the corrosion resistant layer is formed is unlikely to occur contact failure even if a carbon pillar constituting an operation key makes repeated contacts.
Owner:IBIDEN CO LTD
A silicon based mems microphone, a system and a package with the same
ActiveCN103347808AReduce shockAvoid enteringDecorative surface effectsSemiconductor electrostatic transducersDrop testsNetwork structure
A silicon based MEMS microphone comprises a silicon substrate (100) and an acoustic sensing part (11) supported on the silicon substrate, wherein a mesh-structured back hole (140) is formed in the substrate and aligned with the acoustic sensing part, the mesh-structured back hole includes a plurality of mesh beams (141) which are interconnected with each other and supported on the sidewall (142) of the mesh-structure back hole, the plurality of mesh beams and the side wall define a plurality of mesh holes (143) which all have a tapered profile and merge into one hole in the vicinity of the acoustic sensing part at the top side of the silicon substrate. The mesh-structured back hole can help to streamline the air pressure pulse caused, for example, in a drop test and thus reduce the impact on the acoustic sensing part of the microphone, and also serve as a protection filter to prevent alien substances such as particles entering the microphone.
Owner:WEIFANG GOERTEK MICROELECTRONICS CO LTD
Multilayer printed wiring board and manufacturing method of the multilayer printed wiring board
ActiveUS7626829B2Improve buffering effectMore reliabilitySemiconductor/solid-state device detailsSolid-state devicesElectricityDrop tests
Owner:IBIDEN CO LTD
Drop test device for movable impact platform
A drop test device for a movable impact platform can be used in the fields of spin-up drop tests of an aircraft landing gear, rolling property tests, tire static property tests and tire dynamic property tests. The drop test device for the movable impact platform comprises a portal frame, a ground fixing mechanism, a retraction jack, a hanging basket, a landing gear, a hanging basket guide mechanism, a clearance regulation mechanism, a movable impact platform, a hydraulic driving system and a ground guide mechanism. The movable impact platform of the invention consists of a truss-frame structure and high-speed guide rails, wherein the high-speed guide rails are connected with the truss-frame structure by blots through guide rail mounting holes. The hydraulic driving system is a high-speed servo proportional hydraulic system and is fixed on the ground through the ground fixing mechanism. The ground guide mechanism is two rows of guide sliding blocks which pass through the portal frame and are arranged parallelly. The movable impact platform is connected with the hydraulic driving system and is placed on the ground guide mechanism. The drop test device for the movable impact platform provided by the invention has the advantages of compact and simple structure and high strength and rigidity.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Turf test apparatus
InactiveUS6925858B2Reduce resistanceEarth material testingTesting manufactured objectsAccelerometerDrop tests
Owner:TESTING SERVICES
Drop test machine
InactiveCN103257025AImprove efficiencyHigh precisionElectrical measurement instrument detailsElectrical testingElectricityDrop tests
The invention discloses a drop test machine which is used for testing impact-resisting performance of an article to be tested. The drop test machine comprises a ball falling device, a load-bearing assembly and an electric cabinet electrically connected to the ball dropping device and the load-bearing assembly. The load-bearing assembly is used for bearing the article to be tested. The ball falling device is used for allowing an impact ball with the certain weight to fall on the article to be tested and offering preset impact force to test points of the article to be tested. The electric cabinet controls the ball falling device to adjust the falling vertical height of the impact ball and controls the load-bearing assembly to adjust the horizontal position of the article to be tested. Therefore, the impact ball falls down and is aligned with various test points of the article to be tested in sequence so that an impact-resisting performance test can be carried out on the various test points in sequence.
Owner:HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
Dual BGA alloy structure for improved board-level reliability performance
InactiveUS20070023910A1Improve performanceSemiconductor/solid-state device detailsSolid-state devicesDrop testsSolder ball
A method of improving the performance of a ball grid array package under temperature cycling and drop tests is disclosed. The method comprises forming a ball grid array with two types of solder balls. The first type of ball has a composition that improves performance under temperature cycling and the second set of solder balls has a composition that improves performance under drop testing. Preferably, the first set of balls is under the die near its perimeter and the second set of balls is located near the package perimeter, particularly at corners. A related concept pertains to a semiconductor device comprising a printed circuit board and a ball grid array package attached to the printed circuit board by an array of solder balls. The solder ball array comprises first and second sets of solder balls, the two sets having distinctly different compositions.
Owner:TEXAS INSTR INC
Drop-hammer impact tension-compression integrated load test conversion device
PendingCN107228792AEasy to design and manufactureSimple structureStrength propertiesTension compressionDrop tests
The invention discloses a drop-hammer impact tension-compression integrated load test conversion device, and belongs to the technical field of test equipment. The device mainly comprises a drop-hammer test loader, a tension-compression integrated loading mechanism and a base, wherein the tension-compression integrated loading mechanism comprises an impact platform, a connecting guide rod, a fixed platform and a sliding platform. A compression loading mechanism and a tension loading mechanism are connected integrally to form the conversion device through the connecting guide rod, and drop-hammer impact load can be converted into compression or tension load; the test device is simple in structure construction and processing and manufacturing and convenient to assemble and mount, and compression and tension load requirements can be met simultaneously; compression tests, tension tests and shearing tests of engineering structure materials can be realized by adjusting local devices in pressed and tensile test areas, and dynamic mechanical property during impact load of actual engineering structure material can be simulated and tested.
Owner:HUNAN UNIV
Image measuring method for compression quantity of tyre and axle displacement in drop test
ActiveCN102121821AAvoid shockAvoid installation difficultiesUsing optical meansShock testingMeasurement deviceDrop tests
The invention discloses an image measuring method for compression quantity of a tyre and an axle displacement in a drop test. The axle displacement is obtained by the steps of arranging a mark pattern on an axle, acquiring high-speed photographic images of a wheel during moving, and tracking and positioning marks in each frame image, and the compression quantity of the tyre is obtained by simple calculation. In the image measuring method, the marks arranged on the axle are used as measuring objects, high-speed photographic digital images of the machine wheel and the marks are captured by a high-speed camera in the drop test, and impact of the motion of the machine wheel on a measuring device and difficulty in installation are avoided due to non-contact measuring.
Owner:JIANGXI HONGDU AVIATION IND GRP
Drop test apparatus
InactiveUS20090031783A1Avoid influenceEasy to holdUsing mechanical meansStrength propertiesFree fallingDrop impact
Drop test apparatus, for performing a drop impact test by dropping an article to be tested on a landing surface in a free fall state and by colliding the article with the landing surface, is equipped with a holder for holding the article and an acceleration means for accelerating the holder. The holder with the article is accelerated in the dropping direction of the article by the acceleration means, and the article is released from the holder at the point when the holder is accelerated to a predetermined speed and is dropped to the landing surface. The reproducibility of the test can be enhanced due to an elimination of an unstable factor such as frictional resistance when the holder is dropped, and a higher test in a dropping height without scaling-up the apparatus can be achieved.
Owner:HITACHI TECH & SERVICES
Crack initiation steel pipe for full-scale gas bursting test of large-diameter high-grade steel gas pipeline and preparation method thereof
The invention discloses a crack initiation steel pipe for a full-scale gas bursting test of a large-diameter high-grade steel gas pipeline and a preparation method thereof, belonging to the field of a petroleum pipeline breakage control test. The steel pipe comprises the following components by weight percent: 0.07%-0.12% of C, 1.50%-1.75% of Mn, 0.15%-0.35% of Si, less than or equal to 0.015% of P, 0.010%-0.020% of S, 0.005%-0.030% of Al, less than or equal to 0.002% of O, less than or equal to 0.00015% of H, less than or equal to 0.005% of N and the balance of Fe; and carbon equivalent is less than or equal to 0.55%, and the cold cracking sensitive coefficient is less than or equal to 0.28%. The preparation method comprises the following steps: smelting and continuously casting the raw materials so as to form a thick slab; carrying out rough rolling and precise rolling so as to obtain a hot rolled steel plate; and forming the hot rolled steel plate, then welding, and then expanding diameter so as to prepare the steel pipe, wherein the yield strength of the steel pipe is 550MPa-840MPa, the tensile strength of the steel pipe is 625MPa-990MPa, the charpy impact toughness of the steel pipe at the temperature of 0 DEG C is controlled between 100J-200J, and the fracture shearing area in a drop test is larger than or equal to 85%. The prepared steel pipe is used as the crack initiation steel pipe for the full-scale gas bursting test; and after crack initiation is carried out, the fracture is of ductile fracture topography and has no obvious fracture separation.
Owner:BC P INC CHINA NAT PETROLEUM CORP +1
Drop test table
The invention provides a drop test table, and belongs to the technical field of shock test equipment. The drop test table is composed of a supporting system, a lifting drop system and a secondary-shock-preventing drop system. The supporting system comprises guide rails (1) and a shock pad (2). The four guide rails (1), an upper drop table surface (21) and a lower drop table surface (22) form a cube to support the whole test table and guarantee the stability and guidance performance. The shock pad (2) is arranged on the bottom of the test table. The lifting drop system comprises a rigid base (3) and a collision plane (4). The top end of the rigid base (3) is of a half-round shape. The collision plane (4) is fixed below a drop table surface (18). The drop test table is good in stability and repeatability. Different shock accelerated speeds can be obtained by adjusting the elevation height of the drop table surface, the test requirements under different conditions can be met, secondary shock is avoided, operation is simple, and a man-made influence factor is small.
Owner:深圳市唯特偶新材料股份有限公司
A drop test device
The invention discloses a drop test device, which comprises a support beam and a base. A clamp is arranged on the support beam and comprises a clamping part. The clamping part is used for clamping an object to be tested and provided with a control module which is used for controlling the action of the clamping part. A base is positioned below the clamp so that the tested object drops on the base after falling from the clamp. The drop test device is characterized in that the support beam is provided with a slide rail vertically, the clamp is provided with a slide seat matched with a slide rail. The support beam is further provided with a fixture for fixing the clamp at a special position of the slide rail in the initial test state. The support beam is further provided with a sensitive switch for sensing the position of the clamp on the slide rail and outputting a position signal to the control module. The drop test device of the invention can guarantee the object to be tested not to shift in most process of the dropping, can enhance the test accuracy, and is suitable for the drop test of finished hard disks during the manufacturing of the mobile hard disks.
Owner:YITUO SCI & TECH CO LTD SHENZHEN
Electrochemical energy storage device
InactiveCN105742712AAvoid the problem of difficult entry into the shellImprove long-term cycle performanceNatural rubber adhesivesFinal product manufactureHigh rateDrop tests
The invention provides an electrochemical energy storage device. The electrochemical energy storage device comprises a battery core, an electrolyte and a package shell and also comprises a glue material, wherein the glue material is arranged between the battery core and the package shell and comprises a viscous layer and a protection layer, the viscous layer is directly or indirectly pasted on the outer surface of the battery core, one surface, far away from the battery core, of the viscous layer is an adhesive surface, the protection layer is arranged on the adhesive surface of the viscous layer and is completely or partially dissolved or swelled and dispersed in the electrolyte so that the adhesive surface of the viscous layer is exposed and the battery core and the package shell are bonded by the viscous layer, the protection layer is a polar molecule, and the polar molecule comprises one or more of -F, -CO-NH-, -NH-CO-NH- and -NH-CO-O-. By the electrochemical energy storage device, the battery core and the package shell can be fixedly connected, the various problems during the drop test process are solved, the problem that the battery core is difficult to enter the shell due to viscosity of the two surfaces of the glue material also can be prevented, and meanwhile, the electrochemical energy storage device has high cycle performance and high-rate charging-discharging performance.
Owner:DONGGUAN AMPEREX TECH +1
Fall impact apparatus
InactiveUS6892564B2Easy to separateAcceleration measurementUsing mechanical meansDrop testsImmobilization test
Owner:UNIDEN
Fall impact apparatus
InactiveUS20050016256A1Easy to separateAcceleration measurementStrength propertiesDrop testsEngineering
An object of the present invention is to provide a fall impact apparatus, namely a fall impact apparatus, which is capable of fixing the attitudinal angle of a test subject during a drop test until the moment at which the test subject collides with a dropping subject surface. The fall impact apparatus comprises a test subject fixing member for fixing a test subject which is to be tested for impact strength at a desired attitudinal angle, a hoisting and dropping member for raising and dropping the test subject fixing member to which the test subject is fixed along the falling direction of the test subject, and a dropping subject surface structured so as to collide only with the test subject at the terminal end of the falling direction without interfering with the hoisting and dropping member when the hoisting and dropping member is dropped together with the test subject fixing member. The test subject fixing member is supported by the hoisting and dropping member without being affixed thereto such that when the test subject collides with the dropping subject surface, the fixing member separates freely from the hoisting and dropping member.
Owner:UNIDEN
Rotational speed image measurement technology of landing gear drop test aircraft wheel
ActiveCN102141573ASimple structureImprove dynamic responsivenessDevices using optical meansShock testingDrop testsWheel and axle
The invention discloses a rotational speed image measurement technology which comprises the following steps of acquiring a high-speed photographing image in a running process of an aircraft wheel with setting of mark patterns on a wheel axle and an aircraft wheel hub; locating a mark in each frame of image so that a coordinate of the center of the wheel axle is acquired, thereby displacement of arotary angle of the wheel is acquired; acquiring an aircraft wheel rotational speed through simple calculation; and finishing rotational speed image measurement of the landing gear drop test aircraftwheel.
Owner:JIANGXI HONGDU AVIATION IND GRP
Drop tester bench
The invention discloses a dropping tester table, which comprises a support, a cylinder with an up-down telescopic core bar, an air claw and a control circuit. The core bar can be directly fixed with the air claw, and can be fixed with the air claw after the core bar is connected with connecting piece; the support comprises an adjusting part the height of which can be adjusted; the cylinder is provided with the adjusting part; the air claw comprises a clamping part for clamping a work piece to be detected; the control circuit is electrically connected with the cylinder and the air claw, and is used for controlling automatic inflation and deflation of the cylinder and the air claw so as to realize up-down movement of the core bar and clamp or loosen the work piece to be detected by the clamping part of the air claw. The air claw is driven by the cylinder to move so as to throw the work piece to be detected, which can automatically carry out a dropping test. Meanwhile, the dropping test of the work piece to be detected with different heights is realized by adjusting the height of the adjusting part of the support.
Owner:HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
Electronic product packaging box with corrugated paper buffering cushion
ActiveCN102975982AImprove buffering effectMeet environmental protection requirementsPackaging vehiclesContainers for machinesDrop testsThree dimensional shape
An electronic product packaging box with a corrugated paper buffering cushion comprises an inner box (300), an outer box (200), and the buffering cushion (100), wherein the inner box and the outer box are in snap fit with each other, the buffering cushion is arranged in a hollow area which is formed by the inner box and the outer box being in snap fit, the buffering cushion (100) is folded to a three-dimensional shape through a piece of corrugated paper. The buffering cushion comprises a power supply part storage area (10), an accessory storage area (20) and a product placing area (30) which are separated out after the corrugated paper is folded. By the adoption of exquisite structural design, the electronic product packaging box with the corrugated paper buffering cushion is capable of lowering cost, fully satisfying requirements of buffering and drop tests, and fully guaranteeing safety of product packaging. The electronic product packaging box is very applicable for packages of small and medium sized electronic products like an MP4, a mobile phone, a player, a router and a camera.
Owner:高胜良
Three-dimensional force measuring platform device
InactiveCN103308233ASimple structureEasy to useApparatus for force/torque/work measurementDrop testsEngineering
Owner:CHINA AIRPLANT STRENGTH RES INST
Rigid prediction method of mangoes after impact damage based on hyper-spectrum
ActiveCN107543801AReduce distractionsGood for deep diggingMaterial analysis by optical meansPretreatment methodDrop tests
The invention discloses a rigid prediction method of mangoes after impact damage based on hyper-spectrum. The rigid prediction method comprises the steps that firstly, mango samples are divided into acomparison group (undamaged) and an experimental group (damaged), and the samples of the experimental group are placed at three different heights of a drop test machine respectively and fall free togenerate impact damage; then a hyper-spectrum imaging system is adopted for collecting spectrum images of the samples, and meanwhile a physical property analyzer is adopted for measuring and analyzingthe rigid value of sample pulp; finally a spectrum pre-treatment method, a characteristic wavelength extraction method and a statistical method are combined to build a pulp rigid prediction model, and the pulp rigid prediction model is applied to rigid prediction of the mangoes after impact damage. The rigid prediction method of mangoes effectively detects the change of rigid value of the mangoesafter impact damage based on a hyper-spectrum imaging technology and a mathematical modeling technology, has the advantages of no damage, quickness, accuracy and the like and can provide an importantmeans for revealing of fruit damage mechanism and no-damage evaluation of mechanical fruit damage.
Owner:TIANJIN UNIV OF COMMERCE
Drop test bed with speed controllable rotation driving mechanism
The invention discloses a drop test bed with a speed controllable rotation driving mechanism, which comprises a test bed rack, a hanging bracket and an undercarriage, wherein the hanging bracket is arranged in the test bed rack and can creep down along sliding ways of the test bed rack; and the undercarriage is fixed at the lower end of the hanging bracket. An electromotor is also arranged at the lower end of the hanging bracket. An electromotor belt pulley is connected to an output shaft of the electromotor. An airplane wheel belt pulley synchronous with an airplane wheel is arranged on the airplane wheel of the undercarriage, and is in transmission with the electromotor belt pulley through a belt. A travel switch is also arranged on the sliding way of the test bed rack, and controls the electromotor to stop when the airplane wheel is landed. The drop test bed with the speed controllable rotation driving mechanism has a light and compact structure, simple layout and reliable performance, and is convenient to operate.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Drop test device based on e-commerce product packaging box
InactiveCN111829744AImprove practicalityIncrease flexibilityWork holdersShock testingDrop testsElectric machinery
The invention provides a drop test device based on an e-commerce product packaging box, which belongs to the technical field of drop test devices, and aims to solve the problem that when a box body isfixed on a test piece fixing frame of an existing drop test device, the box body is fixed very strenuously due to the fact that the box body is fixed through a fixing support. The device comprises abottom plate, and a sliding support member is fixedly connected with the middle part of the rear side of the upper end face of the bottom plate. Aclamping mechanism drives two clamping discs to clampthe box body,then the box body is moved upwards to a required height through the lifting mechanism,an external controller is used for controlling a rotating shaft of the clamping motor to reversely rotate, the clamping screws are rotated in opposite directions, so that the two clamping plates move in opposite directions, the box body loses the clamping effect, then the drop test is carried out, the box body does not need to be carried manually when the box body is fixed, more labor is saved when the box body is fixed, and the practicability of the drop test device is further improved.
Owner:刘桂花
Multilayer printed wiring board and manufacturing method of the multilayer printed wiring board
ActiveUS20100000087A1Improve buffering effectMore reliabilityPrinted circuit assemblingContact member manufacturingDrop testsContact failure
This invention provides a multilayer printed wiring board in which electric connectivity and functionality are obtained by improving reliability and particularly, reliability to the drop test can be improved. No corrosion resistant layer is formed on a solder pad 60B on which a component is to be mounted so as to obtain flexibility. Thus, if an impact is received from outside when a related product is dropped, the impact can be buffered so as to protect any mounted component from being removed. On the other hand, land 60A in which the corrosion resistant layer is formed is unlikely to occur contact failure even if a carbon pillar constituting an operation key makes repeated contacts.
Owner:IBIDEN CO LTD
Analog calculating method for landing buffering process of equipment air drop
InactiveCN102789526AAccurately reflect dynamic response characteristicsReflects dynamic response characteristicsSpecial data processing applicationsElement modelDrop tests
The invention relates to the technical field of simulation evaluation of an air drop technology, in particular to an analog calculating method for the landing buffering process of the equipment air drop. The analog calculating method comprises the following three implementing steps of: establishing a finite element model of an equipment-airbag system by a computer; carrying out analog calculation on the landing buffering process of the equipment air drop on the basis of a nonlinear finite element; and generating an analog result of the landing buffering process of the equipment air drop. The analog calculating method implements the simulation on the landing buffering process of the equipment air drop on the basis of a nonlinear finite element method and also acquires a simulation calculation method for the airbag buffering characteristic of the equipment-airbag system and the equipment impact response characteristic, provides an effective measure for the demonstration, design and development work of air drop equipment, and solves the problems of high risk, high cost and long period of the equipment air drop test.
Owner:ACADEMY OF ARMORED FORCES ENG PLA
Apparatus for drop testing and method utilizing the same
InactiveUS20100162789A1Deterioration of testGood repeatabilityUsing mechanical meansStrength propertiesEngineeringTest object
An apparatus for drop testing is disclosed. The apparatus has a drop angle setting jig that horizontally moves on a support frame and positions a test object at a predetermined angle by clamping with a fixture. The jig provides a second datum plane and is connected to a moveable holding frame, with the holding frame providing a first datum plane. After the fixture clamps the testing object, the jig can be pulled back without touching the testing object, and the testing object stays still. Therefore, the testing object can be precisely positioned. Furthermore, with the sliding track and the stopping block, the jig is able to quickly return back to the reference position.
Owner:POWERTECH TECHNOLOGY
High-accuracy airplane wheel pre-rotating mechanism for drop test of airplane landing gear
ActiveCN102072804ASolve the problem that the ground contact speed is difficult to control accuratelySimple structureMeasurement devicesJet aeroplaneDrop tests
The invention discloses a high-accuracy airplane wheel pre-rotating mechanism for a drop test of an airplane landing gear. The mechanism comprises a hanging basket and a landing gear, wherein the landing gear is fixed at the lower end of the hanging basket; the lower end of the hanging basket is provided with a swing frame; the upper end of the swing frame is rotationally connected with the hanging basket; the lower end of the swing frame is provided with a friction wheel; the swing frame is provided with a motor; an output shaft of the motor is in transmission connection with the friction wheel; a first positioning device for positioning the swing frame at a first position is arranged between the swing frame and the landing gear; and at the first position, the friction wheel is in close contact with an airplane wheel of the landing gear and drives the airplane wheel to rotate. The mechanism has a simple and compact structure, stable performance and high accuracy, and is convenient to operate.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Top coal gangue interface recognition test system
ActiveCN108534975AStrong expandabilitySave spaceVibration testingShock testingDrop impactPilot system
The invention relates to a top coal gangue interface recognition test system comprising a base, a coal gangue particle impact vibration test device, a simulating coal flow coal gangue drop impact testdevice. The coal gangue particle impact vibration test device comprises a vibration table device, a bracket assembly, a coal release device and a high-speed camera component. The coal release devicereleases the coal gangue particles to the vibration table device. The high-speed camera component obtains instantaneous image information that the coal gangue particles drop on the vibration table device. The simulating coal flow coal gangue drop impact test device includes a simulating coal flow drop device, a coal gangue transport device, a coal shovel device and a top coal hydraulic support working group. Subsequently, a simulating coal pressure loading device and coal flow buckle device perform a simulating coal flow coal gangue drop impact test on the top coal hydraulic support working group. The test system can realize the vibration plate test of single-particle, multi-particle, group-particle coal gangue impact simulation, can also simulate the actual drop of the top coal, and can effectively obtain the data of the top coal drop test.
Owner:SHANDONG UNIV OF SCI & TECH
Drop test device
The invention relates to a drop test device and belongs to the technical field of the technological equipment. The drop test device is mainly characterized by comprising a base, a fastening bolt, a contact plate mechanism, a support, a reinforcing cross beam, guide rails, a top beam, a lifting hook, a pulley, a clamp, a limiting plate, a ladder, a bottom beam, a nylon rope and a winch; the contact plate mechanism comprises a pin seat, a shaft pin, a contact plate seat, a base, a groove, a contact plate and a supporting rod; the winch is used for controlling different heights, the contact plate mechanism is used for controlling different dropping angles, and the guide rails and the limiting plate are used for guaranteeing a vertical drop trajectory; the pulley is located in the same vertical plane with the two guide rails. The drop test device is good in test result consistency, wide in application range, safe for people to operate, quick and simple in retesting, convenient to adjust and maintain, and the like.
Owner:江南工业集团有限公司
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