388results about How to "Reduce collision force" patented technology

The invention relates to methods for preparing graphene or graphene oxide, and belongs to the technical field of preparation of nanometer materials. A wet method comprises the following steps of: putting a carbon material, a magnetic steel needle grinding body and a solvent into a grinding container, and closing; putting the container into a space with a changing magnetic field, and peeling to obtain a mixture of graphite nanometer microchip-graphene; and separating the graphite nanometer microchip-graphene from a steel needle, settling, and performing centrifugal separation to obtain transparent suspension of the graphene. A dry method comprises the following steps of: putting a carbon material and a magnetic steel needle grinding body into a grinding container, and closing; and putting the container into a space with a changing magnetic field, and peeling to obtain mixture dry powder of graphite nanometer microchip-graphene. The methods have the characteristics of high collision frequency and grinding efficiency and short preparation time.

The invention discloses an optimal track planning method for a space robot for capturing a rolling target. The method comprises the steps that a motion equation of the space robot and the rolling target is set up; a solution algorithm of the work space of the space robot and a determining rule of the optimal capturing opportunity are provided; the optimal capturing track of a mechanical arm end effector is obtained, finally, the effectiveness of the method is verified through examples. According to the determining rule of the optimal capturing opportunity, it can be guaranteed that capturing occurs in the path-independent work space of the space robot, and therefore a dynamics singular problem is avoided. According to the optimal capturing track, obtained based on the optimal control theory, of the mechanical arm end effector, it can be guaranteed that the end effector and a capturing point on the target reach the same position at the identical speed, and therefore collision force generated during capturing is minimum.

The invention provides a preparation method of high-purity micro-fine low-oxygen titanium powder, which belongs to the technical field of powder preparation in the powder metallurgy process. The preparation method is characterized by combining hydrogenation and dehydrogenation with a jet milling process, firstly carrying out hydrogenation treatment on a titanium sponge to prepare titanium hydride powder, then utilizing a jet mill to break the titanium hydride, then carrying out vacuum dehydrogenation, and finally utilizing the jet mill to carry out breaking gradation and vacuum package and obtaining a titanium powder product. Compared with the traditional ball milling process, the jet milling process causes no pollution, and iron impurities caused by collision of steel balls in the ball milling process can be avoided; due to jet milling and high-vacuum dehydrogenation treatment, the content of oxygen can be controlled to be lowest, and the powder taking and packaging operations are respectively carried out in a glove box, so that the powder and the air are isolated in the whole process, and further, the prepared high-purity micro-fine low-oxygen titanium powder is prepared.

A system for sensing an impending collision and controlling a safety device such as an airbag in response to the detection of an impending collision target. Deployment characteristics of the safety device are adjusted based on sensor output. One implementation of the system includes a radar sensor and a vision sensor carried by the vehicle. The radar sensor provides a radar output related to the range and relative velocity of the target. The vision sensor provides a vision output related to the bearing and bearing rate of the target. An electronic control module receives the radar output and the vision output and generates control signals for control safety device and adjusting deployment characteristics.

The invention discloses a non-cooperative target satellite acquisition device and an acquisition method, and belongs to the technical field of aerospace. The non-cooperative target satellite acquisition device includes an outer shell, two four-link capturing pawl mechanisms, four horizontal locking mechanisms, a screw rod and a controller; the two four-link capturing pawl mechanisms are arranged in the outer shell face to face, and the lower parts thereof are fixedly connected with an installing bottom plate; the lower end of the screw rod crosses through the installing bottom plate, and the lower end thereof is connected with a driving mechanism; four horizontal locking mechanisms are respectively located at outside of the two four-link capturing pawl mechanisms, and every two horizontal locking mechanisms are installed on the upper part of the outer shell; both sides of the upper part of the four-link capturing pawl mechanisms are respectively equipped with pressure lever mechanisms; when the four-link capturing pawl mechanisms are descended, the pressure lever mechanisms compress the horizontal locking mechanism to horizontally glide towards inside; the top part of the outer shell is equipped with a photoelectric sensor, and the photoelectric sensor and the driving mechanism are electrically connected with the controller. The non-cooperative target satellite acquisition device is widely applied to the acquisition of various space crafts, and the non-cooperative target satellite acquisition device is wide in application range, big in tolerance, quick in response speed, high in reliability, and others.

The invention discloses an automatic assembling line for motors. The automatic assembling line for the motors comprises a frame, an automatic conveying belt, a motor rotor bearing bit synchronization oiling device, an automatic motor rotor bearing press-fitting device, an automatic spring washer distributing and detecting device, a motor end cap press-fitting device, an automatic motor bearing gap detecting device, an automatic motor ageing testing device and an automatic gluing air dryer for the motors, wherein the automatic conveying belt which is electrically connected with a circuit controller is arranged on the frame; and the motor rotor bearing bit synchronization oiling device, the automatic motor rotor bearing press-fitting device, the automatic spring washer distributing and detecting device, the motor end cap press-fitting device, the automatic motor bearing gap detecting device, the automatic motor ageing testing device and the automatic gluing air dryer for the motors are successively connected together by the automatic conveying belt and are electrically connected with the circuit controller. The automatic assembling line for the motors is high in assembling stability and good in assembling quality, and testing automation of components of the motors can be realized.

The invention provides a full-pose-and-position active-passive compliant robot and a valve screwing-twisting method utilizing the robot, and relates to a robot and a valve screwing-twisting method utilizing the robot. The full-pose-and-position active-passive compliant robot and the valve screwing-twisting method utilizing the robot aim to solve the problems that an industrial robot cannot conductlarge overall motion, and the operating range is narrow; rigid collision and radial contact force are generated between an end actuator and a valve handwheel; damage of operating devices is possiblycaused due to the fact that screwing-twisting resistance torques of different valves are different; and the valve handwheel can produce axial displacement while rotating, and axial contact force of the tail end is brought. The full-pose-and-position active-passive compliant robot comprises a wheel type moving platform, a four-degree-of-freedom manipulator and a compliant end actuator, the four-degree-of-freedom manipulator is mounted on the wheel type moving platform, and a six-axis force sensor is mounted between the four-degree-of-freedom manipulator and the wheel type moving platform; the compliant end actuator is mounted at the tail end of the four-degree-of-freedom manipulator, and a six-axis force sensor is mounted between the compliant end actuator and the four-degree-of-freedom manipulator; and through information of the two sensors, impedance control can be conducted on the wheel type moving platform and the four-degree-of-freedom manipulator. The full-pose-and-position active-passive compliant robot and the valve screwing-twisting method utilizing the robot are suitable for robot remote operation, robot compliant control and valve screwing-twisting operation.

The invention discloses a potato grading control method and device based on machine vision technology. The method is characterized in that during image detection, a camera field-of-view is divided into virtual passages with the number corresponding to that of guiding lifting levers according to the number of the guiding lifting levers; a logic value is used for indicating whether to-be-graded potatoes exist on each virtual passage or not; a control and processing unit controls the guiding lifting levers to act according to the detected logic value, and when the logic value is equal to 1, a guiding mechanism corresponding to the guiding lifting levers is upward pushed out by an air cylinder, and potatoes are in contact with the guiding lifting levers, so that the running track of the potatoes is changed, and the potatoes are separated to be thrown into corresponding discharging chutes; and after a camera is used for acquiring images of the potatoes, a virtual circle is drawn by taking the transverse diameters of the potatoes as the diameter according to the image detection result, and whether one or more guide lifting levers are adopted for separating the potatoes is determined according to the areas, occupied by the virtual circle, of the virtual passages. The fast detection of potatoes with various and different quality can be realized, damage to the potatoes can be reduced, and the sorting of the potatoes can be precisely realized.

The invention relates to a bridge anti-collision device of a composite material, which is characterized in that the bridge anti-collision device of the composite material is in a bar-shaped structure or an annular structure which is matched with the shape of a bridge, wherein the bar-shaped or annular structure is at least provided with an anti-collision unit (10) or at least comprises one anti-collision unit (10) and one connecting rod (12). The two adjacent anti-collision units (10) which are mutually connected are connected by a flange (4) and a bolt (5), and the connecting rods (12) are installed at both ends of one anti-collision unit (10) or are installed between the two anti-collision units (10) which are adjacent but not connected with each other so as to form the annular structure; each anti-collision unit (10) comprises a casing (11), a filling material (3) filled in the casing (11) and a canvas bag (7) which is installed at one side of the casing and is filled with a buffering material (6), the canvas bags (7) are connected with the casings (11) by pull ropes (8), anti-collision handrails (9) are also connected on the casings (11), and the casings (11) are also solid casings of the composite material or are in a structure comprising two layers of internal and external composite material surface layers (1) and a sandwich material (2). The invention has low cost, good anti-collision performance, greenness and environmental protection.

An electrical connection terminal structure includes: a main body defining a chamber; a metal leaf spring disposed in the chamber, the metal leaf spring being movable with the motion of a shift member to press a conductive wire into electrical connection or release the conductive wire; and an elastic unit mounted in the chamber. When the metal leaf spring is released from the pressing of the shift member to release the conductive wire from the pressing, the elastic unit normally makes the metal leaf spring and the shift member move toward a position where the conductive wire is released. This improves the shortcoming of the conventional electrical connection terminal that when released, the metal leaf spring is apt to interfere with the conductive wire and make it hard to extract the conductive wire out of the main body.

A docking ring capturing and locking mechanism comprises at least three capturing handles; each capturing handle comprises a movable paw, a motor, a ball screw, a transmission gear, a movable paw switching piece, a linear guide rail and a shell; the motors drive the ball screws to rotate through the transmission gears; the movable paws are mounted on the ball screws through the movable paw switching pieces; the ball screws drive the movable paws to move along the linear guide rails; the ball screws and the linear guide rails are mounted on the shells; and the movable paws are used for capturing and locking external docking rings. The docking ring capturing and locking mechanism can directly cooperate with a control sub system to finish all capturing, docking and locking tasks without othermechanisms such as a mechanical arm to carry out preliminary assisted capturing and connection and is especially suitable for on-orbit and follow-up uncustomized satellites to realize on-orbit services.

The invention discloses an anti-dropping and shock-proof transformer oil tank. The oil tank comprises a shock-absorption spring, a groove and a threaded hole, wherein during use, two pull rods are pulled to squeeze springs in clamping grooves, rotary rods are rotated, so that first door plates are glided, and an opening of a tank body is opened; an oil tank is put on the upper surface of a shock-absorption frame, each nut and the corresponding gliding rod are in threaded tightening, the rotary rods are rotated, each rotary rod between the corresponding pull rod and the tank body is removed, the whole oil tank is fixed through baffles, in the oil tank collision process, the shock-absorption frame is squeezed under the collision force and moves downwards to squeeze the internal shock-absorption springs, the collision force is buffered, and the situation that the shock-absorption springs are out of elasticity due to long-term squeeze can be prevented under the action of rubber pads. A transformer box is convenient to mount, the oil tank is convenient to mount and dismount, anti-dropping and shock-proof, the situation that the oil tank is damaged due to the fact that a transport worker collides the oil tank carelessly in the carrying process can be prevented, the stability and the safety of the oil tank are further protected, and noise produced in the running process of a transformer can be reduced with the adoption of the double-layer tank body.

The invention discloses an anti-blockage, dust suppression and noise reduction coal transport system for a power plant. The coal transport system comprises an upstream conveying device, a coal falling pipe and a downstream conveying device, wherein the discharging end of the upstream conveying device is used for feeding materials into the feeding hole of the coal falling pipe; the discharging hole of the coal falling pipe is used for feeding the materials to the feeding end of the downstream conveying device; the coal falling pipe comprises a throat hopper and a three-arc-segment coal falling pipe. The three-arc-segment coal falling pipe is designed on the basis of discrete element simulation EDEM, and has high coal type adaptability. By adopting a flow channel, the blockage of coal particles can be well prevented; meanwhile, the collision angles of the coal particles and a pipeline are reduced, and the advantage of reducing noise is realized. The three-segment coal falling pipe is spliced by adopting a deflection way, and a hydraulic damping device is arranged on a bend collision point, so that wear of the pipeline can be reduced effectively. Meanwhile, the speed of the coal particles is limited, soft landing of the coal particles and a downstream conveying belt is realized, impact on the conveying belt is reduced, and the production of dust is reduced.

The invention discloses an energy absorption box based on an inner core with a concave polyhedron negative Poisson's ratio three-dimensional structure. The energy absorption box includes a front mounting plate fixedly connected to an automobile anti-collision beam, a rear mounting plate fixedly connected to an automobile longitudinal beam, an energy absorption box body and the inner core with theconcave polyhedron negative Poisson's ratio three-dimensional structure filling the cavity of the box body. The inner core is form by multiple concave polyhedron negative Poisson's ratio unit cell structures arranged in a three-dimensional array. The energy absorption box of the invention has a negative Poisson's ratio and a stiffness enhancement characteristic in a direction of impact by combining the negative Poisson's ratio three-dimensional structure, and so the energy absorption box can improve the energy absorbing effect under a plurality of working conditions and improve the collision safety performance of vehicles.

The invention relates to an intelligent early warning height limiting system and a work method. The intelligent early warning height limiting system comprises front detecting devices connected with acontrol device, a height limiting mechanism and a snapshotting mechanism. The front detecting devices comprise a first detecting device, a second detecting device and a third detecting device, the height limiting mechanism is used for limiting passing of an ultrahigh vehicle detected by the front detecting devices, the height limiting mechanism is provided with a warning system connected with thecontrol device, the warning system is used for sending warning information to a vehicle driver, and the snapshotting mechanism is used for snapshotting a vehicle which exceeds the height and forcing to pass through the height limiting mechanism and transmitting the snapshot to a traffic administrative department database. The height limiting system can effectively warn the driver whether the vehicle can pass through the height limiting mechanism or not, the warning effect is good, and management of a traffic administrative department is convenient.

In a damped closing mechanism for automatic shutting pull door, a door closing mechanism includes a screw wheel to store restoring force, a change over device and a brake gear to produce a damping effect is integrally combined and equipped on the frame of a moving door panel. The brake gear is to alleviate the actuating force and moving speed of the door panel provided by the screw wheel. The change over device is capable of changing the damping effect of the brake gear to generate nearby the closing position of the door so as to alleviate colliding speed and impulse of the moving door panel with the door post when shutting without affecting the pulling of the door panel before closing.

The invention relates to a non-cooperative target satellite-rocket docking ring capturing mechanism and a capture method thereof. The invention solves the problems of low integration, large volume, heavy weight and low tolerance, and long capture time of the existing non-cooperative target docking ring capturing mechanism. The non-cooperative target satellite-rocket docking ring capturing mechanism adopts a motor to directly drive the ball screw shaft to drive the screw nut fixed on the adapter to carry out linear motion. A low end of that adapter and the capture fin forms a swivel pair through the needle bearing assembly. An upper support housing needle roller bearing assembly is placed in the middle of the positioning groove of the capture finger. The upward and downward motion of the adapter makes the capturing finger to complete the opening and closing motion, and accomplish the capture of the non-cooperative target. The stroke switch and the stroke switch signal acquisition boardare used to control the opening and closing of the capture finger. The invention is applicable to the capture of the satellite-arrow butt joint ring, and has the advantages of small volume, large tolerance, high connection rigidity, short capture time and the like.

An anti-collision guardrail, comprising a guardrail foundation (1), a column (2), a beam (3) and an energy-absorbing threaded part (4), the guardrail foundation (1) is F-shaped, placed horizontally in the roadbed, and the guardrail foundation (1 ) on the foundation beam (11) on the rear section to open a guide groove (12), in the foundation beam (11) at the front end of the guide groove (12), a hole (13) is provided along the longitudinal direction, and a hole (13) is set in the hole (13). The energy-absorbing threaded part (4), the column (2) is arranged in the guide groove (12) and connected with the energy-absorbing threaded part (4), the beam (3) is arranged in front of the column (2) and connected with the column (2) . The invention has the characteristics of firm foundation, no encroachment on the effective driving road surface, buffering and energy absorbing effect when the vehicle collides with the guardrail, reduced collision intensity and good guiding ability, and can minimize the damage to the vehicle and passengers caused by the collision. It is especially suitable for highway anti-collision barriers and bridge anti-collision barriers on cliffs.

The invention relates to a device for recovering unmanned airborne vehicles comprising support means connected to the ground and retention means connected to the support means, it being possible for the device to occupy a non-operational position and an operational position in which the retention means are interposed in the path of the unmanned airborne vehicle. The support means consist of at least one inflatable element (1) comprising a part which, in the inflated position, has two vertical branches, and the retention means (5) are joined to the mentioned part of the at least one inflatable element (1) by sliding means (2), (4), (6), (7), such that the retention means (5), by the thrust of the unmanned airborne vehicle, move and at least partially surround the mentioned airborne vehicle, which is confined in the mentioned retention means.

The invention discloses a catamaran for an ocean engineering, which comprises two floating bodies which are relatively arranged, wherein a space is arranged between the floating bodies; the two floating bodies are connected with each other through at least one box body, and the box body is fixedly arranged on the top parts of the floating bodies; and a slideway is arranged between the box body on the top parts of the floating bodies and the tail end of the catamaran. The catamaran has a fender protection function, so the impact between the catamaran and a platform is greatly reduced; and the catamaran adopts a conventional hull mode, has a simple structure, and is convenient and practical. The catamaran provided in the invention is applicable to the installation and dismantling operations of platform modules of various types, and can be widely applied for offshore oil exploitation, so a new ship resource is particularly provided for deepwater oil-field development.

The invention discloses a piston type oscillating cylinder which comprises a cylinder body, rack-shaped piston rods, adjusting screw rods and an output shaft. The cylinder body is provided with two cylinder chambers and two end covers. The two rack-shaped piston rods are arranged in the two cylinder chambers respectively. The two adjusting screw rods are arranged on one end cover. The output shaft is fixedly provided with a gear which is in meshed connection with the two rack-shaped piston rods. The output shaft is connected with a rotary disk. The end cover where the adjusting screw rods are placed is a gas inlet end cover, and the other end cover is a gas outlet end cover. Each adjusting screw rod is provided with a gas inlet hole and a gas inlet adjusting mechanism. Each rack-shaped piston rod is provided with a vent hole. The gas outlet end cover is provided with two exhaust holes and two exhaust adjusting mechanisms which correspond to the two cylinder chambers respectively. According to the piston type oscillating cylinder, the rack-shaped piston rods are provided with the vent holes so that gas can flow to the other end from one end of each cylinder chamber, a buffer effect is achieved on the movement of the rack-shaped piston rods, the movement of the rack-shaped piston rods is stable and collision force is reduced.

The invention discloses an elevator intelligent brake control method and device. The control method includes: a brake control system which outputs voltage to a brake coil to allow a brake shoe to be separated form a brake wheel is started, and target floor information is input to the brake control system to allow an elevator car to operate; when the distance between the elevator car and the target floor reaches the preset distance, the brake control system slowly reduces voltage output, magnetic force generated by the brake coil reduces gradually, and a compression spring on the brake arm gradually reduces the distance between the brake shoe and the brake wheel; when the elevator car reaches the target floor, voltage output by the brake control system is cut off, the brake shoe tightly holds the brake wheel, and the elevator car stops operating. By the method, brake time during elevator stopping is reduced, and safety hazards such as sliding when the elevator control system fails. Due to the fact that the distance between the brake shoe and the brake wheel is reduced, noise caused by collision of the brake shoe and the brake wheel is reduced. The invention further provides an elevator intelligent brake control device.

The invention discloses a four-legged robot leg structure and a robot. The four-legged robot leg structure comprises: side swing assemblies, hip joint assemblies, thigh assemblies and shank assemblies; the side swing assemblies are arranged at the ends of the thigh assemblies, are positioned on the inner sides of the thigh assemblies and are used to drive the thigh assemblies to swing back and forth, and the other ends of the thigh assemblies are movably connected with the shank assemblies; the hip joint assemblies are arranged on the side swing assemblies, and the hip joint assemblies are used to drive the thigh assemblies to swing left and right through the side swing assemblies. According to the technical scheme, the technical scheme is simple, the back and forth swinging and the left and right swinging of the robot legs can be realized, and the flexibility of the robot legs can be improved, and user experience can be improved.

The invention discloses a passenger car rollover buffer and a passenger car anti-rollover system. The passenger car rollover buffer comprises a rollover buffer support and a rollover buffer assembly. The rollover buffer assembly comprises an outer barrel, an inner barrel, a spring, a piston, a piston rod, a collided head and an inflating device. The outer barrel is provided with an accommodating cavity. One end of the accommodating cavity is communicated with the inflating device through an air flue. The inner barrel is a sealed barrel body and is movably arranged in the accommodating cavity of the outer barrel in an accommodated mode. The outer wall of the inner barrel and the inner wall of the outer barrel are tightly attached to each other so as to divide the accommodating cavity into two parts which are not communicated with each other. The spring abuts against a position between the bottom inside the inner barrel and the piston. The piston is connected with the piston rod, wherein the piston rod penetrates through the outer barrel and is connected with the collided head. The passenger car anti-rollover system further comprises an ECU controller. The ECU controller comprises an angle sensor which is used for measuring the rollover angle of a passenger car. The passenger car rollover buffer and the passenger car anti-rollover system keep a body frame structure unchanged, also reduce the striking force and impact energy at the time of rollover, and improve the rollover safety performance.

The invention relates to a method for preparing high-purity superfine low-oxygen titanium hydride powder and dehydrogenated titanium powder and belongs to the technical field of powder producing in the powder metallurgy process. The method is characterized in that hydrogenation-dehydrogenation is combined with the closed-loop airflow milling process, titanium sponge is hydrogenated and broken to obtain coarse-particle titanium hydride powder, a closed-loop airflow milling system is used to break the titanium hydride powder again, and automatic grading and vacuum packaging are performed to obtain the titanium hydride powder; the titanium hydride powder is dehydrogenated, the closed-loop airflow milling system is used for refining, and automatic grading and vacuum packaging are performed to obtain the dehydrogenated titanium powder. The method has the advantages that the whole process is free of pollution and low in oxidation, continuous production can be achieved, and the prepared titanium hydride powder and dehydrogenated titanium powder are high in purity, even in particle size and low in oxygen content.

The invention discloses an automobile parking auxiliary device, and belongs to the technical field of automobile auxiliary devices. The automobile parking auxiliary device comprises a shell arranged on the wall body, and further comprises three-stage buffering mechanisms and an alarm mechanism arranged in an inner cavity of the shell, the three-stage buffering mechanism is movably connected with atriggering mechanism which extends out of the outside, the triggering mechanism is connected with the alarm mechanism, a first-stage buffering mechanism is arranged between the triggering mechanism and the shell, a secondary buffering mechanism is arranged on the side, facing the first-stage buffering mechanism, of the shell, the triggering mechanism comprises a guide groove formed in the bottomof the inner cavity of the shell and communicated with the outside, a sliding rod capable of sliding in the guiding direction of the guide groove is arranged in the guide groove, one end of the sliding rod extends out of the outside, and the top surface of the sliding rod is higher than the top of the guide groove. According to the automobile parking auxiliary device, buffering and alarming are achieved in a pure mechanical transmission mode, the service time is long, maintenance is facilitated, the price is low, the impact force is reduced through multiple buffering, and the automobile is protected.

The invention discloses a yarn tensioning mechanism for spinning. The mechanism comprises a mounting support and a guide roller. Multiple hollow sleeves annularly and evenly distributed at intervals are radially welded to an inner cavity of the guide roller, connection shafts are fixedly welded between the tip ends of the hollow sleeves, and the guide roller is rotatably connected with the top ends of the front and rear side walls of the inner side of the mounting support through two connection rods. The end, away from a connection shaft, of each hollow sleeve extends to the inner side of theinner circle of the guide roller, the radial side wall of the guide roller is provided with multiple slidable insertion holes annularly and evenly distributed at intervals, an extension rod is slidingly inserted in an inner cavity of each slidable insertion hole, each extension rod extends into an inner cavity of the corresponding hollow sleeve, and the tip end of each extension rod is provided with an I-shaped yarn guide wheel freely rotating on a corresponding mounting rack through the corresponding mounting rack. According to the yarn tensioning mechanism for spinning, the situations are avoided that due to weak tensioning strength, yarn is loose and is wound in disorder, and due to high tensioning strength, the yarn is extremely easily broken off in the guide process.