19 results about "Impact angle" patented technology

The present application relates to the field of sports testing equipment, and the dry snow landing buffer slope testing device based on dummy ejection impact test simulates the situation when the free-style skiing aerials athlete lands by a series of devices such as pressure gas output device, ejector, test dummy, roller slide carpet and air cushion device, the main process is to provide impact speed for the dummy by the ejector, to build 1:1 roller slide carpet air cushion buffer area at the terminal position, to simulate the impact process of the athlete landing link by the initial speed and impact angle, to accelerate the dummy to a certain speed and fly horizontally out by a set of ejection operation system to simulate the speed state when the free fall is about to contact the snow slope; the angle between the snowboard and the slope surface is simulated by adjusting the foot bottom height of the test dummy when the athlete lands each time; the inclination angle state of the real snow slope is simulated by laying the roller slide carpet with a certain inclination angle; and the mechanical properties of the snow ground are simulated by the air pressure of the air cushion device below the roller slide carpet.

The utility model relates to the technical field of helmets, in particular to a split type helmet which comprises a helmet shell and a buffering protection structure, the buffering protection structure comprises a plurality of buffering protection blocks, each buffering protection block is detachably connected with the inner wall of the helmet shell through at least one buckle assembly, and every two adjacent buffering protection blocks are arranged at intervals. The buffering protection block can move relative to the helmet shell through the buckle assembly. When the helmet is impacted, the multiple buffer protection blocks can independently displace relative to the inner wall of the helmet shell and unload force, direct impact and violent rotating force are effectively absorbed, the helmet can be adjusted to adapt to various force impact angles and rotation when the helmet is impacted, and the buffer protection blocks are simple in structure and convenient to use. The buffer protection blocks are convenient to produce and manufacture, the production cost is low, disassembly, assembly and maintenance are convenient, when one buffer protection block is damaged or lost, only targeted replacement is needed, and the maintenance cost is reduced.

The invention discloses an ice water impact test box with an adjustable impact angle and a use method thereof, and relates to the field of ice water impact tests.The ice water impact test box comprises an equipment box, a water tank is arranged in the equipment box, a supporting shaft is rotationally connected to the middle of the water tank, a supporting rotary disc is fixedly connected to the top of the supporting shaft, and a clamp assembly is arranged on the supporting rotary disc; a first motor is fixedly connected to the top of the equipment box and is in transmission connection with the supporting shaft. The ice water impact test device has the beneficial effects that the structure is simple, the use is convenient, the direction of the supporting turntable can be adjusted through driving of the first motor, so that ice water impact tests can be performed from different angles according to requirements, and meanwhile, the device can also adjust the position of impacted ice water, so that the impact tests are performed in multiple dimensions; and the comprehensiveness and reliability of test data are ensured. And the device is also provided with a filtrate disc, so that the liquid after the test can be treated so as to be recycled, and the economical efficiency is greatly improved.

The utility model discloses an anti-drop shock-resistant angle grinder protective cover which comprises a cover body, a hoop is arranged at the top of the cover body, a locking mechanism is arranged in the hoop and comprises a screw rod, the screw rod penetrates through the two ends of the hoop, a hexagonal block is fixed to the right end of the screw rod, a nut is connected to the outer side wall of the screw rod in a threaded mode, and the nut is fixed to the outer side wall of the screw rod in a threaded mode. And a fixing cylinder is fixed to the right side of the clamping hoop, two abrasive paper strips are fixed in the fixing cylinder, and a rotating ring is rotationally connected to the outer side wall of the screw rod. According to the anti-falling impact-resistant angle grinder protective cover, the locking mechanism is arranged, a moving cylinder extrudes an ejector block, the ejector block pushes a moving rod, the moving block and an abrasive paper block to move, and the abrasive paper block makes contact with an abrasive paper strip, so that friction force is increased, a rotating ring is prevented from moving rightwards, a screw rotates reversely to drive the rotating ring to move rightwards, movement of the rotating ring is limited, and reverse rotation of the screw is limited; therefore, the locking stability of the clamp is ensured, and the cover body is prevented from falling off due to looseness.

This utility model discloses an impact testing device, including a test support structure. One side of the test support structure supports an impact test piece, and the other side supports an impact mechanism with an adjustable impact angle. The impact mechanism includes a drive mechanism and a rim dummy connected to the drive mechanism. A tire belt is fixed to the rim dummy using a tire belt clamp, with the tire belt exposed on the outer side of the rim dummy. The drive mechanism can drive the rim dummy to rotate, causing the tire belt to impact the impact test piece. This utility model can effectively simulate the impact test environment of a tire rotating at high speed with a tire belt, and the test results are closer to real-world results.

The application discloses a guidance method with field of view angle and impact angle constraints suitable for variable-speed aircrafts and belongs to the technical field of precise guidance of aircrafts. The application realizes the method as follows: the end impact angle γ f of the aircraft under the proportional guidance is predicted, the difference δ between the expected end impact angle γ d and the end impact angle prediction value γ f is defined as the impact angle control error, and when the impact angle control error δ converges to zero, γ f γ d . The expected change rate of the impact angle control error δ is designed to ensure that δ converges to zero before hitting the target and to meet the field of view angle limitation of the guidance head; the feedback structure of the biased proportional guidance is adopted, the biased item is designed, the impact angle control error δ of the aircraft follows the designed expected change rate, and then the aircraft meets the impact angle and field of view angle constraints while precisely hitting the target, thereby realizing the guidance of the aircraft with the field of view angle and impact angle constraints. In the case that the speed of the aircraft is time-varying, the application can still guarantee the impact angle control performance and meet the field of view angle constraints.

The application belongs to the technical field of speed loading, and discloses an impact angle adjusting device of an impact testing machine. The device comprises a pit and an adjustable base, wherein: the pit is a hollow cube, the upper surface of the pit is provided with a support, the support is matched with a rotating shaft on the side of the impact testing machine, on one hand, the support supports the impact testing machine, on the other hand, the impact testing machine rotates around the rotating shaft; the adjustable base is used for adjusting the impact angle of the impact testing machine; the adjustable base comprises a support, a first angle adjusting unit and a second angle adjusting unit, the first angle adjusting unit and the second angle adjusting unit both comprise a circular arc seat and a support frame, the upper surface of the circular arc seat is an arc-shaped track, the lower surface of the support frame is an arc-shaped bottom surface, the arc-shaped bottom surface is matched with the arc-shaped track, the position of the support frame is adjusted by sliding on the arc-shaped track, and the angle of the impact testing machine is adjusted in this way. Through the application, the problem of angle adjustment of the impact testing machine in the impact experiment is solved.

The utility model discloses a kind of impact angle adjusting mechanism of punch pile machine square hammer, including the support of symmetrical arrangement, the vertical plate is installed between the support, two groups of hydraulic rod are symmetrically installed on the one side wall of vertical plate. Advantageous effect lies in: the utility model is adjusted by setting a group of auxiliary positioning mechanism consisting of adjusting shaft, level sensor, servo motor, detection plate and laser positioner, when the impact angle of hammer block is adjusted by hydraulic rod, in the process of vertical plate rotation, level sensor detects the levelness of detection plate and keeps detection plate always horizontal by servo motor driving adjusting shaft rotation, and then laser positioner can make the laser point that it strikes play auxiliary reference role to staff, can adjust the direction and angle of hammer block according to laser point, ensure that hammer block and pile hole are in the same axiality, on the one hand, it can be quickly adjusted in place, and adjustment efficiency is high, on the other hand, improve its use effect.

The invention relates to a method for detecting minor damage to a vehicle (1) using a central control unit (12) in which an internal sensor (14) is arranged, and an evaluation and control unit (20), wherein direction-dependent sensor data are continuously received from the internal sensor (14) and processed and evaluated as required, wherein at least one feature is calculated based on the direction-dependent sensor data or the processed direction-dependent sensor data, wherein an impact zone (AZ) and an impact angle (AW) are estimated based on the at least one calculated feature, and wherein at least one threshold value is specified based on the estimated impact zone (AZ) and the estimated impact angle (AW).wherein the at least one calculated feature and / or the direction-dependent sensor data and / or the processed direction-dependent sensor data are compared with the at least one threshold value, wherein an external influence on the vehicle (1) and a corresponding minor damage are detected if the at least one calculated feature and / or the direction-dependent sensor data and / or the processed direction-dependent sensor data exceed the at least one predetermined threshold value and fall below a trigger threshold of restraint devices of an occupant protection system of the vehicle (1), as well as a control unit arrangement (10) for a vehicle (1).

The utility model discloses an anti-impact angular contact ball bearing, which relates to the technical field of angular contact ball bearings and comprises an outer ring, an inner ring is arranged in the middle of the outer ring, and two symmetrically distributed retainers are slidably clamped between the outer ring and the inner ring. A plurality of mounting holes distributed in an annular array mode are formed in the middles of the two retainers, rolling bodies are slidably clamped in the middles of the mounting holes, elastic connecting pieces are fixedly installed in the middles of the two retainers, two symmetrically-distributed mounting blocks are fixedly installed on one side of one retainer, and the elastic connecting pieces are fixedly installed on the other side of the other retainer. The retainer can be conveniently detached from the position between the inner ring and the outer ring through the arrangement of the inside hexagonal bolts, meanwhile, the retainer is of a sectional structure through the arrangement of the elastic connecting pieces, all the sections are connected through the elastic connecting pieces so as to adapt to deformation under impact loads, and the service life of the retainer is prolonged. The impact resistance and the bearing capacity of the bearing are obviously improved, and the service life is prolonged.

The invention discloses a composite material impact damage simulation modeling method, system and device and a storage medium, and the method comprises the steps: building a three-dimensional geometric model of a composite material according to microscopic characterization; according to the impact angle and the material characteristics, different finite element unit types are adopted for modeling; in the simulation model, endowing each layer with a corresponding material direction according to the layer angle so as to define the orthotropic mechanical property of the layer; performing explicit dynamic analysis on the assembled simulation model, and simulating an impact process by adopting an explicit integral algorithm; simulation data of the simulation impact process are obtained, and damage evaluation is carried out. The method has the remarkable effects that high-precision simulation and effective evaluation of the impact damage behavior of the composite pipe are realized, and the method is suitable for failure mode prediction, dynamic mechanical response analysis and damage evaluation under various impact angles and energy conditions.

The application discloses a kind of composite guidance aircraft guidance control methods considering fly time angle of fall constraint, comprising the following steps: setting guidance law in multiple aircrafts;Desired terminal missile line-of-sight angle and desired flight time of multiple aircrafts are set;For each aircraft, after the aircraft is launched, the condition information of the aircraft is acquired in real time, the condition information is input into the guidance law, and the overload instruction of the aircraft is obtained;The guidance law includes angle of fall control sub-guidance law and fly time control sub-guidance law, angle of fall control sub-guidance law is used to control aircraft to reach target position according to expected angle of fall, and fly time control sub-guidance law is used to control aircraft to reach target position according to expected flight time.The composite guidance aircraft guidance control method considering fly time angle of fall constraint disclosed by the application can realize accurate guidance under the double constraints of fly time and angle of fall, so that the aircraft can realize strong anti-interference high-precision saturated attack.

This utility model relates to a wear-resistant structure suitable for black water buffer tanks, including an isolation layer and a wear-resistant layer welded to the inner end face of a flange cover. The isolation layer is located between the wear-resistant layer and the inner end face of the flange cover. A hemispherical impact zone protruding outwards is provided in the center of the inner end face of the flange cover, and a conical reflection zone is provided around the impact zone. The outer edge of the reflection zone extends to the outer edge of the inner end face of the flange cover, and the height of the outer edge of the reflection zone is not lower than the center height of the impact zone. The inner edge of the reflection zone transitions to the outer edge of the impact zone with a rounded arc. The isolation layer and the wear-resistant layer completely cover the reflection zone and the impact zone. This utility model utilizes the isolation layer welded between the wear-resistant layer and the substrate to absorb the stress released by the wear-resistant layer, protecting the mechanical properties of the substrate from the influence of stress release from the wear-resistant layer. Simultaneously, the impact zone and reflection zone on the inner end face of the flange cover utilize the spherical structure of the impact zone to increase the contact area with the highly abrasive medium, reduce the impact angle, and decrease the degree of wear.

This invention relates to the field of automotive grille testing technology, specifically to a simulated real-world testing device for automotive grille strength. The device includes a base with an impact detection section and a pretreatment section. The pretreatment section extends above the impact detection section, simulating the impact effects of flying stones or other objects at different angles in actual driving conditions. It can also irregularly change the shape of the impact end, allowing the impact detection section to contact the automotive grille in diverse forms for testing, realistically reproducing the impact force brought by foreign object impact. Before the automotive grille is tested, the pretreatment section creates a corrosive environment with high or low temperatures, allowing the grille to be fully exposed to these conditions before testing. This comprehensively simulates the actual working conditions of the automotive grille, effectively ensuring that the impact test results accurately reflect the strength of the automotive grille, i.e., its resistance to foreign object impacts on real roads.

The invention relates to a single silt particle impact test device and a use method thereof, and belongs to the field of silt particle impact dynamics research in the field of hydraulic machinery. The device comprises a power control system, an air gun launching system, a high-speed photographing system and a universal adjusting system, wide-range regulation and control of the particle impact speed are achieved through the power control system, the particle size and trajectory are precisely regulated and controlled through the air gun launching system, the high-speed photographing system captures the particle motion trail and the surface deformation recovery process of a test piece, and precise simulation of particle multi-angle impact is completed through the universal adjusting system. The device can realize the wide range of speed (10-100 m / s), the wide range of particle size (1-5 mm) and the wide range of impact angle (5-90 degrees), and can effectively reproduce the impact damage behavior of multi-scale sediment particles on the wall surface of the device under the working condition of hydraulic machinery. The device can efficiently carry out a single sediment particle impact test, is accurate in regulation and control, is wide in applicability, and has an important application value for related research of hydraulic machinery sediment impact.

The invention discloses aero-engine fan impact vibration testing equipment and method, and belongs to the technical field of aero-engine testing. The equipment comprises a test box, the interior of which is a sealed cavity; the temperature adjusting unit is used for changing the temperature in the sealed cavity; the transmitting unit is used for transmitting compressed air shock waves to enter the sealed cavity through the transmitting tube and impact the rotating fan test piece; the angle adjusting unit is used for changing the inclination angle of the launching tube so as to change the impact angle; and the vibration response pickup unit is used for capturing the vibration state of the fan test piece after being impacted. By integrating the temperature, angle and speed adjusting functions, complex working conditions of different working temperatures and different impact angles and speeds can be simulated, and accurate measurement of the vibration response after the fan blade is impacted by the foreign matter is achieved. According to the invention, an efficient and accurate test platform is provided for evaluating the shock resistance and vibration characteristics of the composite material fan blade in a complex environment.

The utility model relates to the technical field of ship anti-collision, in particular to a drum-type elastic ship navigation tunnel channel anti-collision side wall device which comprises a wall body, a supporting rod, a string rod, a spring sleeve, a damping spring, a pressing plate and an anti-collision drum, the wall body is provided with an installation groove, and the anti-collision drum is made of high-elasticity wear-resisting rubber materials and connected with the string rod through a bearing when used. The friction between the ship and the side wall can be reduced, energy can be absorbed by means of rubber deformation, the supporting rods are connected with the spring sleeves, the pressing plates abut against the damping springs to stretch out and draw back so that impact energy can be reduced, the supporting rods are rigidly connected with the string rods, the impact energy can be dispersed through the multi-stage design, and in this way, the multi-stage spring sleeves are connected to be matched with any channel depth; a roller structure, elastic rubber, a spring sleeve and multi-stage design are combined to achieve comprehensive energy dissipation, interval arrangement is targeted to adapt to the rubbing scene with the length and the small collision angle of a ship, and damage to the side wall of a navigation channel caused by ship deflection rubbing is reduced.

This utility model discloses a dredging device for cofferdam construction, belonging to the field of dredging equipment. The device includes an impact nozzle slidably mounted on the surface of a housing. The impact nozzle is connected to the output end of a high-pressure pump via a connecting pipe. The high-pressure pump and impact nozzle can spray water with a certain impact force to impact the sand layer, disrupting its structure and cutting it into smaller pieces for easier suction by a cutter pump. Simultaneously, it suspends sand particles in the water, forming mud. Because the sand particles in the mud are encapsulated by water, direct contact with the cutter pump surface is reduced, thus lowering the abrasion rate. An adjustment frame and a fixing frame are installed between the impact nozzle and the housing, allowing the impact nozzle to move up and down on the housing surface and change its impact direction and angle. The position of the impact nozzle can be automatically adjusted according to the sand layer at different locations inside the cofferdam, ensuring that the water sprayed by the impact nozzle can disrupt the sand layer structure, thus guaranteeing dredging quality and extending the service life of the cutter pump.

The utility model discloses a kind of automobile bumper collision test bench devices, the device includes installation platform, the upper surface of the installation platform is provided with impact adjustment mechanism, the impact adjustment mechanism includes impact component, adjustment component and positioning component, the inside of the adjustment component is provided with bumper, to adjust the impact angle of bumper, the positioning component clamps the bumper, the impact direction of the impact component is towards bumper, to impact bumper. The present application can guarantee the stable clamping during bumper collision test process, avoid clamping loose to affect test data, can realize the flexible adjustment of bumper impact angle, collect multi-angle collision data, improve the comprehensiveness of test, support diversified collision scene simulation, adapt to different collision needs, facilitate to observe the deformation effect of bumper after collision, improve the convenience of test data acquisition and device practicality.