488 results about "Mechanical abrasion" patented technology

A solar cell that is readily manufactured using processing techniques which are less expensive than microelectronic circuit processing. In preferred embodiments, printing techniques are utilized in selectively forming masks for use in etching of silicon oxide and diffusing dopants and in forming metal contacts to diffused regions. In a preferred embodiment, p-doped regions and n-doped regions are alternately formed in a surface of the wafer in offset levels through use of masking and etching techniques. Metal contacts are made to the p-regions and n-regions by first forming a seed layer stack that comprises a first layer such as aluminum that contacts silicon and functions as an infrared reflector, second layer such titanium tungsten that acts as diffusion barrier, and a third layer functions as a plating base. A thick conductive layer such as copper is then plated over the seed layer, and the seed layer between plated lines is removed. A front surface of the wafer is preferably textured by etching or mechanical abrasion with an antireflection layer provided over the textured surface. A field layer can be provided in the textured surface with the combined effect being a very low surface recombination velocity.

The invention discloses a double-layer membranous tissue repair material and a preparation method thereof, wherein, a cell-free membranous biological derivative material is used as a surface layer, and a fibroblast is compounded in the interior of a biological support material to form a substrate, and then the surface layer and the substrate are combined in a chimeric way to form the double-layer membranous tissue repair material; a compact surface layer structure can effectively reduce the loss of water, electrolytes and protein from surface of wound, avoid the invading and the reproduction of bacteria to the impaired surface of wound as well as prevent the infection of the surface of wound, thus being beneficial to epitheliosis and epithelial growth; the substrate can directly repair the surface of wound, promote the ingrowth of cells around the surface of wound and the angiogenesis, induce the differentiation from stem cells to skin cells and quicken wound healing; compared with the existing products, the tissue repair material has the advantages of being capable of promoting the regeneration of skin, improving the elasticity, the flexibility and the mechanical abrasion resistance of skin after the surface of wound is healed, reducing hyperplasia of scar tissues, controlling the contracture, having excellent biocompatibility, increasing the success rate of transplant and improving the quality of healing; the invention has wide material resources and simple production method; the double-layer membranous tissue repair material prepared is applicable to the clinical treatment of skin defect caused by inflammation, ulcer, thermal burns, iatrogenicity and the like.

The invention discloses a control device for a PTZ camera with an altitude self-calibration function. The control device comprises a rail, a rail platform, a rail motor, the PTZ camera, a PTZ motor, a first sensor, a second sensor and an embedded microcontroller, wherein the rail platform is arranged on the rail and can slide along the rail; the rail motor is connected with the rail platform and provides power for motion of the rail platform; the PTZ camera is installed on the rail platform and can move along with the rail platform; the PTZ motor is connected with the PTZ camera and provides power for pitching and deflection of the PTZ camera; the first sensor is arranged on the rail platform and can move along with the rail platform; the second sensor is arranged on the PTZ camera and can pitch and deflect along with the PTZ camera; the first sensor and the second sensor are connected with the signal input end of the embedded microcontroller respectively, and the rail motor and the PTZ motor are connected with the output end of the embedded microcontroller respectively. The invention further discloses a control method. According to the control device and method, travel distance errors and deflection and pitching angle errors caused by mechanical abrasion, thermal expansion and cold contraction and other factors can be compensated, and altitude self-calibration is achieved.

Beginning with a smooth ground aluminum blank with a relatively thin layer of leveled Ni—P, circumferential electropolishing/texturing is carried out to achieve a smooth oriented surface. A conductive slurry is provided between the disc and a porous texturing tape which is in contact with a conducting plate or equivalent conductor. The disc serves as the anode, and the conducting plate as the cathode, while the slurry, being conductive, functions as an electrolyte. In the presence of current, a reverse electroplating occurs so that the Ni—P dissolves to form Ni²⁺, or nickel ions which are carried away by the conductive slurry. The conductive slurry further supports or carries therein abrasive material so that by moving the porous texturing tape past the disc surface, the texturing tape picks up the abrasive material in the slurry and simultaneously with the reverse electroplating, provides the desired mechanical abrasion to achieve texturing of the disc surface. The abrasive material comprises diamond particles. The circumferential electropolishing/texturing polish is achieved by spinning the disc while applying the mechanical-chemical action through the slurry system to the disc surface with electric current passing through the electrically conducting interface during processing.

The invention discloses a two-dimensional quick control reflecting mirror. The two-dimensional quick control reflecting mirror comprises a reflecting lens, a first support, a second support, a first flexible hinge, a first piezoelectric actuator, a second piezoelectric actuator, a third piezoelectric actuator, a first-level inclined platform, a base seat and a control drive system. The two supports are symmetrically fixed on a central axis of the base seat, the first piezoelectric actuator is arranged below the position between the two supports, and the three piezoelectric actuators are sequentially arranged in a space formed by enclosure of the first-level inclined platform, the first support and the second support. The actuators are connected with the top of the first-level inclined platform through the first flexible hinge, and the reflecting lens is fixed on the first flexible hinge. The control drive system is used for achieving closed-loop control on deflection angles of the reflecting lens. The two-dimensional quick control reflecting mirror has the advantages of being fast in drive speed, high in control accuracy, free of mechanical abrasion, compact in mechanism, high in space utilization rate, free of interferences between shafts, good in stability, small in size, light in weight, high in rigidity and capable of achieving single-mirror-face two-dimensional scanning.

The invention discloses a pipeline safety pre-warning and leakage monitoring alarm method. The alarm method can carry out pre-warning timely in the cases of external pipeline damaging events, external pipeline corrosion, internal corrosion, local stray current corrosion, anticorrosive coating strip-off corrosion and pipe stock mechanical abrasion reduction. Once a sudden event changes too fast, pre-warning is not carried out in time, and thus pipeline leakage is caused, the alarm method also can discover the situation and send an alarm, as core algorithm software runs in an upper host and a lower host and is used for processing real-time and static data, the pipeline safety pre-warning and leakage alarm are realized. The core algorithms include data acquisition requirements, an exception identifier, a simple equivalent circuit analytical method, a pipeline external damage and corrosion pre-warning positioning method, a pipeline internal corrosion pre-warning and positioning method, a local stray current corrosion pre-warning and positioning method, a pipe stock mechanical abrasion reduction pre-warning and positioning method, and a pipeline leakage monitoring alarm positioning method, the methods are realized by using the exception identifier.

In an underground exploitation process of a coal mine, the coal recovery rate needs improving, and a roller bit of a coal mining machine is prevented from cutting roof strata as far as possible so as not to damage equipment or even cause accidents, so an interface of a coal layer and a rock layer needs on-line identification. The invention provides a coal-rock interface identification method, a coal-rock interface identification system and a coal-rock interface identification probe. A specific energy-level high-pressure water jet which can penetrate the coal layer but cannot penetrate the rock layer is jetted to the coal layer above a tunnel, different acting forces of reflected flow reflected by the coal layer or the rock layer on a nozzle are sensed in real time, and a controller judges the distance between the upper end of the roller bit of the coal mining machine and the coal-rock interface to realize automatic heightening control of a rocker arm of the coal mining machine so that the coal exploitation process realizes the goals of high recovery rate, low mechanical abrasion rate, automatic operation and the like. The coal-rock interface identification method, the coal-rock interface identification system and the coal-rock interface identification probe provided by the invention have the advantages of low cost, high adaptability, high reliability, intrinsic safety and the like.

The present invention relates to ink-jet inks in combination with a clear, dry toner to produce a permanent ink-jet image. In particular, this invention relates to an ink system that utilizes the addition of specific toner/developers, typically found in the laser printer field, with aqueous based in-jet inks. These dual systems produce a permanent image that is resistant to image degradation factors such as mechanical abrasion, light, water, and solvents such as the ones used in highlighter markers.

The invention discloses a vehicle parking braking system, which comprises a signal acquisition unit for acquiring a vehicle state signal and a signal input unit for inputting a driver operation instruction, wherein the signal acquisition unit and the signal input unit output signals to a control unit; the control unit analyzes and processes the signals, and controls an execution unit to enable a vehicle brake caliper to clamp or release a brake disc. According to the system, required optimal braking force can be provided for parking, and the mechanical abrasion of the brake caliper is effectively reduced; in addition, the system can function in emergency braking after a travel braking system fails, so that a vehicle can be safety parked, and the safety of the vehicle is ensured.

The invention discloses a double-layer artificial skin and a preparation method thereof, wherein, cell-free membranous biological derivative material is used as a surface layer, and a fibroblast, extracellular matrix synthesized and secreted by the fibroblast and a cell growth factor are compounded in the interior of biological support material to form a dermis, and then the surface layer and the dermis are combined to form the double-layer artificial skin; a compact surface layer structure can effectively reduce the loss of water, electrolytes and protein from surface of wound, avoid the invading and the reproduction of bacteria to the impaired surface of wound as well as the infection of the surface of wound, and be beneficial to epitheliosis and epithelial growth; the dermis can directly repair the surface of wound, promote the ingrowth of cells around the surface of wound and the angiogenesis, induce the differentiation from stem cells to skin cells and quicken wound healing; the artificial skin has the advantages of being capable of promoting the regeneration of skin, improving the elasticity, the flexibility and the mechanical abrasion resistance of skin after the surface of wound is healed, reducing excess scar tissues, controlling the contracture, having excellent biocompatibility, increasing the success rate of transplant and improving the quality of healing; the double-layer artificial skin has wide material resources and simple production method, and is applicable to the clinical treatment of skin defect caused by inflammation, ulcer, thermal burns, iatrogenicity and the like.

The invention discloses an ultraphonic elliptical vibration and extrusion processing device based on a double-excitation longitudinal bending elliptical energy converter, comprising a shell assembly, a vibration assembly, a sliding assembly and a pressure assembly, wherein the sliding assembly is sleeved on the excircle surface of the vibration assembly; the pressure assembly is arranged on the tail part of the vibration assembly; and the assembled vibration assembly, the sliding assembly and the pressure assembly are arranged in the shell assembly. The structure of the ultraphonic elliptical vibration and extrusion processing device is designed by combining a flexible extrusion requirement with a langevin energy converter principle, when the ultraphonic elliptical vibration and extrusion processing device is adopted to carry out extrusion processing, the double-excitation longitudinal bending elliptical energy converter of the ultraphonic elliptical vibration and extrusion processing device can drive a cutter to cautiously take longitudinal bending elliptical vibration, tracks of the longitudinal bending elliptical vibration are tangent with tracks of the turning motion of a workpiece and is reverse to the turning direction of the workpiece, when the turning speed of the longitudinal bending elliptical vibration is equal or approximately equal to the turning speed of the workpiece, the cutter is equivalent to make pure rolling on the surface of the workpiece so that relative sliding between the cutter and the processing surface disappears, and the mechanical abrasion caused by sliding friction is effectively prevented, and the purpose of prolonging the service life of the cutter is achieved.

The invention relates to a universal servocontrol platform device for a motor-operating mechanism of a high-voltage switch apparatus and a control method; the device comprises an operating mechanism, a main loop and a control loop, wherein, the input terminal of a signal pretreatment circuit in the control loop is connected with a voltage mutual inductor and a current mutual inductor, for measuring the voltage and the current of a power network. The control method for the device comprises the step of calculating optimal contact speed via values of the voltage and the current acquired by the power network to control the operation of the contact. The invention has the advantage that the values of the voltage and the current of the power network are used for calculating an optical speed curve in a DSP chip, a switch on/off speed is compared with the optical speed curve while being regulated and controlled in order to regulate the on/off speed for minimizing an impact on the switch, optimizing the speed, reducing the generation of electric arcs, decreasing mechanical abrasion, promoting the switching effect and saving electric power. Meanwhile, a variety of operating mechanisms can be replaced mutually on the inventive operating platform, thus saving the manufacturing cost, simplifying the operation and saving labor force and material resource.

The invention provides a control system and pre-start method of a blade electric vehicle. The method comprises the steps that 1, the vehicle state information is collected; and 2, whether to take the pre-start strategy or not is determined according to the vehicle state information. A motor gives out a small calibrated torque before the vehicle starts, so that gears of a transmission system of the vehicle are all in an engaged state, various start patterns start according to the intention of a driver, and shaking caused by impact to the transmission system of the vehicle is reduced; and meanwhile, mechanical abrasion can be reduced, and start noise can be lowered. There is no need to change the structure of an existing vehicle or additionally arranging hardware equipment like sensors, and implementation is easy. Through the control method, the vehicle can start quickly and stably, and meanwhile, coasting during starting of the vehicle can also be avoided.

The invention discloses a method for adaptively controlling neutral positions of steering wheels of electric power-assisted steering systems. The method includes detecting current turning angles of each steering wheel, the rotational speeds of the steering wheel, torque of the steering wheel, vehicle speeds and wheel speeds of four wheels in real time when the corresponding vehicle run straightly; correcting offset of the neutral positions of each steering wheel if difference values of the turning angles of the steering wheel, the rotational speeds of the steering wheel, the torque of the steering wheel and the wheel speeds of the four wheels are respectively smaller than respective preset thresholds, the vehicle speeds are larger than preset thresholds and the current turning angles of the steering wheel are not zero in preset time ranges. The method has the advantages that the offset of the neutral points of the steering wheels due to mechanical abrasion of gears and racks of steering engines in usage procedures of the vehicle can be corrected, and accordingly the neutral positions of turning angles of the steering wheels can be assuredly matched with current real turning angles of vehicles; processes for calibrating the neutral positions of the steering wheels can be replaced, and accordingly users can learn the accurate neutral positions of the steering wheels without the processes for calibrating the neutral positions of the steering wheels of the integral vehicles after the integral vehicles are used for a period of time.

Various embodiments of a capsule polishing device include a resistive-heating element including an electrically resistive, superelastic wire forming a loop between first and second ends of the superelastic wire. The first and second ends of the loop may at least partially extend from a planar face defined by the loop, to an insulating portion. In some embodiments, the capsule polishing device may be configured to perform active capsule polishing through a combination of hyperthermia of LECs and mechanical abrasion of the capsule surface. In some embodiments, at least a side and end portion of the loop of the capsule polishing device may be shaped to follow a contour of the capsule bag. The loop may be heated to approximately 40 to 47 degrees Celsius to destroy LECs (other temperatures are also possible). In some embodiments, the loop may include a roughened surface to increase mechanical abrasion.

The invention relates to a special axial flow pump, in particular to a heart auxiliary device of an axial magnetic force unloading type axial flow pump in the field of biomedical engineering. The heart auxiliary device is implanted into the human body. The auxiliary device is a pump-machine combination body and is composed of a pump system and a motor system. The heart auxiliary device is characterized in that an impeller position control soft magnet is installed at the rear end of a stator core, when an impeller moves forwards or backwards due to external force in a pump cylinder, the impeller position control soft magnet and the stator core generate magnetic constraining force on a permanent magnet rotor in an impeller hub, and the direction of force is opposite to the axial moving direction of the impeller. When the axial flow pump works, the magnetic constraining force can form partial and even whole axial magnetic force unloading on axial force loads of the impeller and a shaft, and axial magnetic levitation of the impeller is achieved. According to the heart auxiliary device of the axial magnetic force unloading device, mechanical abrasion and the friction heat effect can be reduced, the thrombus in the pump is prevented from being formed, complications are reduced, the service life of the axial flow pump is prolonged, and stability of continuous work is improved.

The invention relates to an outer-rotor composite permanent-magnetic brushless in-wheel motor of an electric vehicle, which comprises an outer rotor (1), a back shaft (7) connected with the outer rotor (1), an outer-rotor yoke (2) arranged on the inner wall of the outer rotor (1), a permanent magnet (3) circumferentially and evenly inlaid on the outer-rotor yoke (2), a magnet adjusting ring (4) connected with the permanent magnet (3) and fixed on the back shaft (7), a stator (5) arranged between the magnet adjusting ring (4) and the back shaft (7) and fixed on the back shaft (7), a winding (6) wound around the stator (5), and a bearing (8) and a rotary shaft (12) arranged on the back shaft (7), wherein the rotary shaft (12) is rotatablely connected with the back shaft (7) through the bearing (8), the back shaft (7) is simultaneously connected with the outer rotor (1) through the bearing (8), and the central axis of the rotary shaft (12) is coincident with the central axis of the outer rotor (1). The invention solves the problems of low power density, mechanical abrasion, noise production and the like of a mechanical speed increasing gear box in the traditional transmission mechanism.

The invention relates to a tensioning floating type flexible joint and a design method thereof. The flexible joint comprises a foundation platform, a driven platform and a plurality of tension elementsets. The upper face structure of the foundation platform is connected with the lower face structure of the driven platform by the horizontal tension element sets. The upper face structure of the foundation platform is connected with the upper face structure of the driven platform by the axial-directional tension element sets. In this way, the driven platform can be supported in a suspension mode. The axial-directional tension element sets provide pulling force vertical downwards. The horizontal tension element sets provide tension force vertical upwards for confronting, and therefore the driven platform can rotate around the foundation platform in a suspension mode without direct mechanical contact. The design method comprises degree of freedom decoupling and uniform dimensionalization stiffness anisotropic design index. The joint can reduce or even eliminate mechanical abrasion and friction caused by mechanical contact, can improve the stress state of the structure, and can reduce driving force demands.

The invention discloses a method for synthesizing N-benzyl maleimide from an immobilized supported acid catalyst and belongs to the synthesis technical field. The method comprises the following steps: soaking silica gel, a molecular sieve, aluminum trioxide and acidic resin or an active carbon carrier in an acid solution in equal volume, drying the mixture to obtain a supported catalyst and putting the supported catalyst into a stainless steel net; adding aniline and maleic anhydride into a benzene, toluene or xylene solvent and acidylating, stirring and heating the mixture to obtain the N-benzyl maleimide acid solution; then adding the N-benzyl maleimide acid solution, a polymerization inhibitor and the supported catalyst into a dehydration reactor for dehydration cyclization, reducing the pressure to remove the solvent and obtain the N-benzyl maleimide crude product, and recrystallizing in the solvent to obtain the N-benzyl maleimide. The invention has the advantages of high yield of N-benzyl maleimide, low content of waste acid, few production flows, low cost and little discharge of acid-containing waste water; moreover, as the catalyst is immobilized, the invention simplifies the replacement of the catalyst, reduces the mechanical abrasion of the catalyst and prolongs the service life of the catalyst.