1835 results about "Impact test" patented technology

The present invention provides an impact resistant sheet material that helps provide exterior walls of a building with resistance to impacts so that the building structure can meet building standards, such as the Miami-Dade County Large Missile Impact Test, for resisting impacts in high wind areas. In one embodiment, sheet material comprises an impact resistant layer that attached to fibrous substrate. The impact resistant layer provides impact resistance to the sheet material so that a wall structure employing the sheet material is able to successfully withstand an impact from a projectile comprising a 9 pound, 7 foot two-by-four (“2×4”) traveling at a speed of at least 34 miles per hour. The impact resistant sheet material may comprise a moisture vapor permeable, water-impermeable barrier layer having a hydrohead of at least 55 cm and a moisture vapor transmission rate of at least 35 g / m2 / day. Such a sheet material is particularly useful in barrier applications, such as a house wrap.

The invention discloses a falling multifunctional measuring device for an impact test of soft composite materials, comprising an impact test unit. The device is also provided with a transient force and displacement testing unit which comprises a sensor supporting sleeve, a piezoelectric force sensor, a grating bar, a photoelectric sensor, a stabilized voltage supply, a charge amplifier and a signal amplifier. The testing unit can be arranged in the impact test unit in a detachable way; the piezoelectric force transducer is positioned in the sensor supporting sleeve, and the input end thereof is connected with the charge amplifier; the sensor supporting sleeve is arranged at the upper end of a hammer head; the grating bar and the sensor supporting sleeve are positioned at the same horizontal line; the grating bar can move synchronously with the hammer head and a base thereof is provided with the photoelectric sensor; the photoelectric sensor is positioned below the grating bar and the excitation voltage thereof is provided by the stabilized voltage supply; and the signal output end of the photoelectric sensor is connected with the signal amplifier. The device has simple structure, high integration level and low cost, and can provide testing data of composite materials in a small energy test.

An External Insulated And Fixed System (EIFS) and method for making the same. The method provides a cost effective procedure for constructing an EIFS that can meet current hurricane high impact test protocol, especially for non-combustible EIFS “Systems”. A reinforcing high impact layer of fiber glass mesh is eliminated, and a high-density compression molded expandable polystyrene board is provided that yields significantly improved impact resistance.

The invention relates to the field of rail welding and discloses a method for post-weld heat processing of a rail welded joint. The method comprises the steps that first cooling is conducted to the to-be-cooled rail welded joint obtained through welding till the temperature is lower than 400 DEG C; then, the rail welded joint obtained after the first cooling is heated to a temperature between 860 DEG C and 930 DEG C; and second cooling is then conducted to the rail welded joint till a tread face temperature of the joint is between 410 DEG C and 450 DEG C, wherein the rail welded joint is a welded joint of a 75kg / m hypereutectoid steel rail and a pearlite steel rail. The method disclosed by the invention is used for the post-weld heat processing of the welded joint of the hypereutectoid steel rail and the PG4 heat-processing steel rail; and the heterogeneous rail joint has fewer internal defects and stable welding quality, and can satisfy requirements for passing tests such as a fatigue test, a stretching and impact test and a static bending test.

Weather resistant composite articles which have a smooth, bubble-free surface and are sufficiently puncture resistant to pass the DynaTup Instrument Impact Test are produced by an open pour process. These composites include a polyurethane, unreinforced barrier coat and a fiber-reinforced polyurethane layer. These composite articles are particularly useful for the production of doors and panels.

A deployable interior door trim for an automotive vehicle that separates in the middle section to separate the lower door trim portion from the armrest. The separating door trim permits a pelvis pusher block to engage the occupant of the vehicle during side impact situations without pushing the armrest into the abdomen region of the occupant. An alternative embodiment has the separation area formed as a line extending around a deployable portion of the door trim corresponding to the pelvis pusher block so that the pusher block can pass through the door trim to engage the occupant pelvis area. Preventing excessive abdomen rib deflections on crash dummies will improve performance ratings in IIHS side impact tests without requiring a structural change in the energy absorbing door structure of the vehicle.

The invention discloses an automobile impact test device used for automobile passive safety detection, composed of fixed wall, railway, buffer, release mechanism, guide mechanism and sliding vehicle. The sliding vehicle is connected with the release mechanism and the guide mechanism, and the test vehicle is controlled in the middle of the guide mechanism. The main idler wheel, side shaft idler wheel and vertical idler wheel of the guide mechanism limit the guide idler wheel to move in the vertical and side directions of the guide rail, and at the same time, the movement has considerably small friction resistance. The space adjusting mechanism can implement stepless adjustment of space between guide members. The test vehicle has very strong adaptability and is uneasy to damage structure. The release mechanism works stably, easy to operate and accurately locates. It combines the impact test of the whole vehicle with the automobile simulated impact test in a test table, successfully implementing 'a test table for two uses'.

The invention discloses a multi-objective optimization design method for a wheel, relates to the technical field of vehicle engineering and aims at solving the problems that the optimization space is limited and automatic optimization design is not carried out through joint transferring of calculation software with various properties due to the fact that only limited performance of the vehicle is analyzed and optimized and parametric modeling is lost at present. The method comprises the steps of topological optimization of a wheel fatigue test, combined topological optimization modeling, fatigue performance analysis, impact performance analysis, aerodynamic performance analysis and multi-objective optimization. Five working conditions of a dynamic bending fatigue test of the wheel, a dynamic radial fatigue test, an impact test of an impact hammer opposite to a spoke, an impact test of the impact hammer opposite to a window and air dynamics analysis of the wheel are set; the properties, such as the strength, the rigidity, the vibration characteristic, the fatigue life, the fatigue life security coefficient, the impact performance, the air dynamic property and the lightweight performance of the wheel are comprehensively considered; various performance parameters are calculated through finite element software emulation; and optimization design is carried out on the wheel by setting the performance parameters to be constraint conditions or objective functions.

The invention discloses a capacitive high-voltage equipment insulation aging diagnostic test system and a working method thereof. Double-frequency time-varying signals are used in the system for carrying out an overlaying impact test, two independent DDS signal generators, a power amplifier with white noise control, an amplitude overlaying unit and a controllable inductive load which is in output connection with the amplitude overlaying unit in series or in parallel form a composite aliasing waveform output loop, a set of information processing analysis method is combined, and insulation aging of tested high-voltage equipment is subjected to test diagnosis. Compared with the prior art, the insulation aging diagnosis test can be completed by exerting a test signal which is lower than a nominal voltage on the tested high-voltage equipment, insulation damage cannot be caused on the high-voltage equipment, the test can be carried out at any time, on-site testing is convenient, testing efficiency is high, compared with an existing diagnosis test signal which is single in waveform, the overlaying impact test signals can obtain abundant testing parameters, and potential fault of the high-voltage equipment can be easily found.

The invention provides a vertical dropping impact test system which comprises a weight-adjustable load, a suspension assembly, a monitoring subsystem, a support frame and a failure protective device. The weight-adjustable load is used for impacting a tested device, the suspension assembly is used for controlling the dropping height of the weight-adjustable load, and the monitoring subsystem is used for monitoring impact procedures; the weight-adjustable load is arranged on the support frame and can move up and down along the support frame, the tested device is arranged right below the weight-adjustable load, the suspension assembly is arranged on the support frame and can adjust the dropping height of the weight-adjustable load, the failure protective device is arranged on the support frame, can move up and down along the support frame and can be locked with the support frame so that the weight-adjustable load can stop dropping, and the suspension assembly and the failure protective device can act under the control of the monitoring subsystem. The vertical dropping impact test system has the advantages that integral procedures of impact or vibration tests and test parameters can be completely recorded, test results are accurate, and the vertical dropping impact test system is high in reliability.

The invention discloses a plate clamper platform for a falling weight impact test, and an impact speed measurement method. The plate clamper platform comprises a clamper structure, a supporting lifting structure and a laser sensor, wherein the clamper structure comprises a plate clamping device, a multi-angle rotation device and a clamper bottom plate, the multi-angle rotation device comprises wall plates, wall plate bolts and a bottom plate bolt, each wall plate is provided with a central hole and two arc-shaped grooves, the two arc-shaped grooves are symmetrically arranged relative to the central hole, clamping plates can rotate along the arc-shaped grooves after the wall plate bolts are completely loosened, the supporting lifting structure comprises a platform and a lifting driving device, the clamper bottom plate can rotate by adopting the bottom plate bolt as the center and can slidably move along a straight strip hole, and the laser sensor is arranged below the weight tray positioned on the periphery of a hammer head. With the plate clamper platform and the impact speed measurement method of the present invention, the composite material plate specimen can be tightly clamped, the multi-angle impact on the specimen can be achieved, and the speed change during the drop hammer falling and impact process can be real-timely measured.

An apparatus 10 for measuring and / or analyzing the rollover characteristics of a vehicle 12. Apparatus 10 includes a controller 14, a selectively movable test fixture assembly 16, a truck or towing vehicle 18 which is coupled to trailer assembly 16 and which selectively tows or drives assembly 16, several cameras 22, 24, 26 and 28, and a user interface 30. Vehicle 12 is attached to test fixture 16, and user interface 30 is used to activate motor assembly 36 which selectively rotates vehicle 12 to a desired roll angle 90 relative to the ground surface 43. Once vehicle 12 is correctly positioned, an operator drives truck 18 at a predetermined and desired speed. Controller 14 generates release signals to exploding bolts 86, 88, which simultaneously explode, thereby releasing vehicle 12 from frame 32. In this manner, apparatus 10 allows the drop height and the translational and vertical velocity of a vehicle to be selectively controlled, adjusted and repeated from test to test, and provides controllable and predictable roof-to-ground impacts.

An impact test apparatus includes a holding device for holding a test piece at an arbitrary holding force, an impact applying device for applying an impact force to the test piece held by the holding device, a force sensor for sensing the impact force applied to the test piece by the impact applying device, a high-speed camera for detecting a displacement of the test piece when applied with the impact force by the impact applying device, and an output device for synchronizing a signal from the force sensor with a signal from the high-speed camera and outputting an impact stress-strain characteristic curve when the impact force is applied to the test piece.

A mesh system for protecting structural openings, such as windows and doors, from storm damage or intrusion is made of a special cable having an aramid core and a twine twisted steel jacket made of a plurality of steel wires spun onto a bundled aramid fiber core. The mesh includes a substantially straight warp and a woven weft. A mesh system designed for limiting the deflection of the mesh under impact and wind load conditions imposed by a hurricane securely fixes and tensions the mesh along at least the direction of the substantially straight warp. A cable construction, cable diameter, mesh weaving loads and percent open area of the mesh are selected such that the mesh system passes a large missile impact test. Security features including periodic use of a plurality of cables and / or sensors may be added to the mesh.

The invention relates to a test bed, which comprises a frame and a first test part for impact test of an automobile door. The first test part comprises a first rope pay-off and take-up mechanism, a pull cable mechanism, an elastic mechanism and a first monitoring mechanism, wherein the first rope pay-off and take-up mechanism is sued for opening an automobile door, the pull cable mechanism is used for unlocking the automobile door, the elastic mechanism is used for applying elastic force to the automobile door to close the same, the first monitoring mechanism is used for monitoring impact of the automobile door in closing, the first rope pay-off and take-up mechanism, the pull cable mechanism, the elastic mechanism and the first monitoring mechanism are respectively disposed on the frame, and the first monitoring system comprises a first angular speed sensor disposed on the edge of the automobile door. The test bed can be used for precisely controlling impact speed, so that accuracy of data testing is improved, and reliability of the test bed is improved.

The invention discloses a strong laser driven explosion and impact effect test platform which comprises a drive system, testing environments, a measurement system and a control system, wherein the control system is respectively connected with the drive system, the test environments and the measurement system. Through an integrated design and development of different test environments, the test platform realizes multiple laser driven explosion and impact functions and has openness; and meanwhile, through coordination and cooperation of multiple high-speed and high-resolution rate testing means, a plurality of physical fields (speed, pressure and image) are measured in real time, and a laser drive explosion and impact test process can be more completely characterized.

The invention discloses a synthesis loop for the running test of a converter valve for a direct current power transmission project. The loop comprises a high-voltage power distribution system, a current source subsystem, a voltages source subsystem, an impact test subsystem, a short-circuit test subsystem, an alternating current filtering subsystem, a control protection system and an auxiliary system, wherein the auxiliary system comprises a low-voltage power distribution system, a water cooling system and a test parameter measuring system. The subsystems are integrated into one loop through reasonable circuit design, so the subsystems can be matched with one another to perform the running test of the converter valve; the loop has a simple structure and runs stably; and due to the control protection system, the running safety of the whole synthesis loop can be ensured, the service life of equipment is prolonged and failure rate is reduced. The synthesis loop can meet the requirement of the running test of the converter valve for the direct current power transmission project of + / -800kV / 5000A and below; and tests prove that the synthesis loop can completely meet the requirement of all running test projects of a high-voltage direct current power transmission thyristor valve in the IEC60700-1:1998 / GB / T 20990.1-2007 standard.

A method for outputting alert messages of a driver assistance system in a vehicle in which data for moving the vehicle and data regarding accident risks in the surroundings of the vehicle are detected, the detected data is evaluated and attributed to a specific accident risk category and an alert message is output subject to the attributed accident risk category. The method according to the invention is characterized in that from the captured movement of the vehicle a planned movement of the vehicle is derived and it is tested whether without modification of the planned movement of the vehicle a collision of the vehicle with another object will occur, and the manner of outputting the alert message is carried out in dependence on the result of said collision testing. The invention further relates to an associated driver assistance system and to a vehicle having such a driver assistance system.

The present invention provides an impact test device and an impact test method which can easily reproduce impact. The impact test device of the invention is provided with the following components: a test member (1) which carries dummies (11) for simulating passengers, a driving device (2) which causes the test member (1) to advance, and a speed reduction device (3) which causes the impact of the test member (1) for reducing speed. The speed reduction device (3) is provided with the following components: a buffer part (31) which impacts with the test member (1), a shaft part (32) which is provided with the buffer part (31) at the front end and extends along the advancing direction of the test member (1), a body part (33) which supports the shaft part (32), a brake device (34) which is configured at the body part (33) and applies the load in a direction which is approximately same with the advancing direction of the test member (1) on an external surface of the shaft part (32), and a control device (35) which controls the load that is applied by the brake device (34).

The invention discloses a multifunctional environmental test box, which comprises a first heating box internally provided with an electric heating element used for heating air, a second heating box and a test box. The second heating box is connected with the first heating box through a blocking device capable of achieving air communication or closing functions, an electric heating element and a fan are arranged in the second heating box to heat the air and generate hot air. The test box is communicated with the second heating box through an air channel capable of achieving opening and closing functions, and a fan and a liquid nitrogen distributor are arranged in the test box. The environmental test box is capable of achieving quick heating and quick cooling through the liquid nitrogen cooling mode due to the fact that a heating system of the environmental test box adopts the two heating boxes and a plurality of electric heating elements. The environmental test box is capable of achieving functions of different environment tests such as temperature impact tests, high low temperature quick temperature change tests and high low temperature circulation tests, correspondingly improves convenience for operators and reduces equipment purchase cost.

The invention relates to a low-temperature resistant and anti-crack cabtyre flexible cable for the wind power generation and is characterized in that a plasticiser inside a rubber insulation and sheath is a low-temperature resistant plasticizer and is added with 2 to 5 portions of pine tar oil and / or cylinder oil and 3 to 8 portions of coupling agent; the pitch of flexible conductor strands is intertwisted by 8 to 14 times; in the situation of a multiple-core cable, the cable pitch of insulating core is 8 to 10 times. Compared with the prior art, the invention improves the flexility at a low temperature, the anti-crack performance, the mechanical performance at a low temperature and the torsibility of the cable of the rubber insulation and sheath and can satisfy the torsibility requirements of a wind energy cable. The cable of the invention is not cracked in an impact test at a low temperature of 40 DEG C below zero and a flexion test, can maintain the flexility at a very low temperature, satisfies the requirement of the cable used at a low temperature or a maritime climate environment, and can be applicable to the use in the environmental conditions of big difference in environmental temperature, salt mist, moist heat, mould fungus, etc. In addition, an environment-friendly auxiliary material is used and the cable insulation as well as the sheath environment are good; therefore, the invention can satisfy the environment-friendly requirements of PAH such as ROHS and RAHS of the EU.

The invention provides a seabed pipeline simulation impact test system. The test system comprises a door-shaped support frame across an earth pond, a pipeline for simulating a seabed pipeline is arranged in the earth pond, a crossbeam of the door-shaped support frame is provided with a moving seat capable of performing translation along the crossbeam, a slide guide rail is vertically arranged below the crossbeam from the moving seat in an extending manner, the moving seat is provided with a lifting winch, the lower end of the lifting winch is suspended with a simulation impact object arranged along the slide guide rail in a sliding manner, the seabed pipeline is positioned right below the crossbeam of the door-shaped support frame, one end of the seabed pipeline is connected with a fixed support frame, the other end of the seabed pipeline is connected with a loading axial load device and a translation support frame in sequence, the seabed pipeline is a sealed pipe body, and one end of the seabed pipeline is connected with a loading internal pressure device. According to the simulation test system, impact test simulation of falling objects for the pipeline can be realized in the conditions of pre-added axial load and internal pressure of the pipeline, and simulation impact tests of the pipelines in the conditions of different lengths, embedding depths, impact positions, and impact contact surface shapes can be conducted.

The invention discloses a large-scale high-magnitude horizontal impact test stand based on a pneumatic type. The test stand comprises a cylinder assembly, an impact assembly, a table surface assembly, an impact assembly reset cylinder and an impact table substrate. The cylinder assembly comprises an impact cylinder and an air reservoir. A front end of a piston push rod of the impact cylinder is integrally and fixedly connected with an impact push board. The impact cylinder and the air reservoir are fixedly connected to the impact table substrate through a rear support. The impact cylinder is acted on the impact push board through the piston push rod and pushes the impact push board to hit the impact assembly arranged on a slide rail. The impact assembly comprises an impact head and an impact hammer body. Two side surfaces of the impact assembly are slidingly arranged in the slide rail. An ability of a test apparatus is the same with an ability of a pendulum bob impact test machine on aspects of a response frequency scope and an impact response spectrum inflection point frequency, but the ability of the test apparatus exceeds the ability of a pendulum bob impact test stand on aspects of important indexes, such as a load capability, an impact response spectrum peak value, a size of the table surface and the like.

The invention discloses an airbag linear impact test platform and a test method thereof. The airbag linear impact test platform comprises a pneumatic device module, an airbag linear impact module, an airbag installation module, an airbag to be tested, a coordinate plate and a test bench, and is characterized in that a photoelectric speed sensor and two high-speed cameras are further installed on the test bench. The test method comprises the steps of 1) adjusting the test platform to an initial state; 2) installing the airbag to be tested on an airbag installation mold; 3) adjusting a pressure adjusting valve to the set pressure; 4) starting a pneumatic pump; 5) pushing an impact block by a piston cylinder; 6) recording the whole unfolding process of the airbag; 7) detecting a contact force between the impact block and the airbag to be tested through an acceleration sensor; 8) carrying out analysis and signal processing on recorded data; and 9) finally, acquiring dynamic characteristic parameters of the airbag to be tested. According to the invention, dynamic characteristics of the airbag in the impact process can be measured effectively, thereby improving the test accuracy.

An ultra-high strength steel having excellent ultra-low temperature toughness, a tensile strength of at least about 930 MPa (135 ksi), and a microstructure comprising predominantly fine-grained lower bainite, fine-grained lath martensite, or mixtures thereof, transformed from substantially unrecrystallized austenite grains and comprising iron and specified weight percentages of the additives: carbon, silicon, manganese, copper, nickel, niobium, vanadium, molybdenum, chromium, titanium, aluminum, calcium, Rare Earth Metals, and magnesium, is prepared by heating a steel slab to a suitable temperature; reducing the slab to form plate in one or more hot rolling passes in a first temperature range in which austenite recrystallizes; further reducing said plate in one or more hot rolling passes in a second temperature range below said first temperature range and above the temperature at which austenite begins to transform to ferrite during cooling; quenching said plate to a suitable Quench Stop Temperature; and stopping said quenching and allowing said plate to air cool to ambient temperature.

An adjustable-type trolley for an impact test comprises a trolley frame (1) and wheels (3), and further comprises a front wheel track adjusting mechanism (8), a rear wheel track adjusting mechanism, a trolley axle track adjusting mechanism (12) and a bottom plate height adjusting mechanism (10), wherein the rear wheel track adjusting mechanism is integrated with the trolley axle track adjusting mechanism (12). The adjustable-type trolley for the impact test disclosed by the invention can adjust the wheel track of the wheels and an axle track, and correspondingly adjust the height of a trolley bottom plate, so as to realize good combination with varisized trolley bodies. Moreover, the adjustable-type trolley for the impact test is simple in structure, convenient in adjustment, and low in cost.

The invention relates to the technical field of high polymer composite materials and particularly relates to a novel heat conduction nylon composite material and a preparation method thereof. The heat conduction nylon composite material is prepared from the following raw materials in percentage by mass: 20-40% of PA6 resin, 15-40% of heat conduction filler, 10-20% of reinforcing filler, 20-40% of a halogen-free flame retardant, 1-3% of flexibilizer, 0.1-0.5% of a coupling agent, 0.4-1.0% of a surface modifier, 0.4-1.0% of a lubricant, 0.1-0.5% of an antioxidant and 0.1-5% of toner, based on 100% in total. Through a hot and cold impact test for over 1000 hours at (-)40 DEG C-120 DEG C, the color of the heat conduction material disclosed by the invention can be regulated to be black, white, self-colored, grey, red, green, and the like without causing incomplete curing of addition type heat conduction silica gel, and thus, the novel heat conduction nylon composite material is halogen-free, flame retardant, and relatively low in carbon footprint.

The invention discloses low temperature resistant H-shaped steel and a production method thereof. The low temperature resistant H-shaped steel comprises the following chemical components in percentage by weight: 0.05-0.11% of C, 0.25-0.50% of Si, 1.40-1.60% of Mn, less than or equal to 0.020% of P, less than or equal to 0.010% of S, 0.025-0.035% of Nb, 0.015-0.030% of Ti, 0.015-0.030% of Alt and the balance of Fe and inevitable impurities. The production method of the low temperature resistant H-shaped steel comprises a molten iron pre-desulphurization step, a converter smelting step, an LF (Ladle Furnace) refining step, a continuous casting step by virtue of a billet caster and a rolling step. A Charpy V-notch impact test is adopted for measuring the low temperature resistant mechanical property of H-shaped steel, impact energy at the temperature of minus 20 DEG C is more than or equal to 144J, and impact energy at the temperature of minus 45 DEG C is more than or equal to 98J.

The invention relates to a comprehensive relay test stand for simulating the operating environments of railways and subways, comprising a temperature box working area, a vibration impact test stand, a test host, an electric tester, a power amplifier of the vibration impact test stand and a cooling fan; the temperature box working area and the vibration impact test stand adopt sealed soft connection; the temperature of the temperature box working area is controlled by a temperature box and a controller thereof; the relay to be tested is arranged in the temperature box working area, and the relay is connected with the electric tester by a testing signal cable; the electric tester is connected with the host of the test stand by a communication cable and is connected with the power amplifier of the vibration impact test stand by a control cable; the power amplifier of the vibration impact test stand is connected with the vibration impact test stand by the control cable; and the vibration impact test stand adopts an air cooling mode and is connected with the cooling fan and a silencer by an air pipe. The test stand can reduce the accidents caused by faults of the relay in the running process of the electric locomotives and subway cars.