1200results about How to "No impact" patented technology

A prosthesis for transluminal implantation consists of a flexible tubular three-dimensionally braided structure of metal or polymeric monofilaments, and polymeric multifilament yarns. The prosthesis can be elastically deformed to reduce its diameter through axial elongation. The monofilaments and multifilament yarns are arranged in axially spaced apart helices, concentric on a common central axis of the prosthesis. The monofilaments are selectively shaped before their interbraiding with the multifilament yarns, either by an age-hardening or other heat-setting stage, or a cold-working stage that controllably plastically deforms the strands. The shaped structural strands cooperate to impart to the prosthesis its nominal shape and resilience. The textile strands cooperate to provide one or more layers of sheeting that reduce permeability and thereby enhance the utility of the prosthesis as a vascular graft. An alternative embodiment prosthesis includes elastically and plastically deformable structural strands, selectively plastically deformed by cold working, then three-dimensionally braided to form the prosthesis.

A method and apparatus for establishing preference settings for a computer during a user session. The apparatus includes the computer coupled to a smart card reader configured to wirelessly detect and access a smart card located within a predetermined zone of the smart card reader. The smart card carries personalized preference settings and unique identification information such that the preference settings are temporarily assigned to the computer when the smart card is within the predetermined zone. The preference settings are updated and stored on the smart card upon departure from the predetermined zone.

This invention presents a noise cancellation device for improved personal face-to-face and radio communications in high noise environments. The device comprises speech acquisition components, an audio signal processing module, a loudspeaker, and a radio interface. With the noise cancellation device, the signal-to-noise ratio can be improved by as much as 30 dB.

An electronic cigarette capable of temperature control and a temperature control method therefor, the electronic cigarette comprises a casing (10), a liquid storage device (101) within the casing (10), an atomizing assembly, a power supply (102), and a circuit control board (103) having a smoking switch SW, the atomizing assembly comprises a heating unit and leads thereof made from thermo-sensitive material whose resistance varies along with the temperature in certain proportion, the circuit control board (103) comprises a power supply managing module (104) which determines temperature of the heating unit and leads thereof by continuously detecting their resistance when the smoking switch SW on, and sends corresponding control signal to make the heating unit and leads thereof connect to/disconnect from the power supply (102) to achieve temperature control, pernicious gas and burnt matter produced by heating unit dry-burn caused by lack of e-liquid threatening users' health is prevented.

The invention relates to a converter-based low voltage ride through control system of a wind generating set, comprising a converter, a converter controller and a low voltage ride through main controller, wherein the converter and an auxiliary circuit breaker are connected in series to form a controlled branch circuit; a main circuit breaker between the wind generating set and a grid is connected in parallel with the controlled branch circuit; a direct current positive electrode bus bar and a direct current negative electrode bus bar are arranged between a rectifier and an inverter; a capacitor and an unloading resistor are connected between the direct current positive electrode bus bar and the direct current negative electrode bus bar; the unloading resistor and the capacitor are connected in parallel; the unloading resistor and a controlled valve are connected in series; the controlled valve is connected with the converter controller; a grid end is connected to an alternating current voltage detector; a direct current voltage detector is connected between the direct current positive electrode bus bar and the direct current negative electrode bus bar; the alternating current voltage detector and the direct current voltage detector are both connected with the low voltage ride through main controller; and the low voltage ride through main controller is connected with the converter controller, the main circuit breaker and the auxiliary circuit breaker. The invention is effectively adapted to occasions where the depth voltage dips and has favorable stability.

The invention discloses a dual-head 3D printer capable of rotatably switching printing heads. The dual-head 3D printer is characterized by comprising a fixing plate, an installation plate which is arranged on the fixing plate, a first printing head and a second printing head, wherein the first printing head and the second printing head are installed on the installation plate in parallel; the fixing plate is provided with a fixed rotating shaft, and the installation plate is connected to the fixed rotating shaft in a way of rotating around the axis of the fixed rotating shaft; the first printing head is arranged below the fixed rotating shaft to the left side, and the second printing head is arranged below the fixed rotating shaft to the right side; and the dual-head 3D printer also comprises a drive mechanism for driving the installation plate to rotate along the fixed rotating shaft. The installation plate is driven by the drive mechanism to rotate, so that the structure that the heights of the two printing heads can be adjusted up and down relatively in the vertical direction, the working printing head is always maintained at a relatively low position, and the non-working printing head is maintained at a relatively high position; thus, the non-working printing head does not influence the surface of a molded workpiece, and the printing quality is improved.

The invention provides a satellite and launch vehicle connection and separation mechanism, comprising a guide rail, a rear end cover, a front end frame, a separation spring, a push plate, a cabin door and a connection unlocking device, wherein the rear end cover is connected to the rear end of the guide rail; the separation spring is arranged in the guide rail and can stretch and retract along the direction of the rail; the push plate is arranged at the front end of the separation spring and is driven by the separation spring to move frontward or backward; the front end frame is connected to the front end of the guide rail; the cabin door is hinged to one side edge of the front end frame; when the front end frame is covered, a satellite is tightly pressed on the push plate and the separation spring, so that satellite and launch vehicle connection is realized; when the front end frame is opened, the separation spring and the push plate are released to frontward push out the satellite, so that satellite and launch vehicle separation is realized; the connection unlocking device is used for locking or unlocking the cabin door in a non-pyrotechnic door. The satellite and launch vehicle connection and separation mechanism has the advantages of low impact, simple structure, light weight, high separation precision, convenience in installation, low cost, high reliability and the like.

The invention relates to a wind collecting vertical type wind power generating system which comprises a wind power system, a vertical type speed increaser, a vertical type generator and an excitation grid-connected control system, wherein the wind power system is connected with the speed increaser and the generator by a chain coupling; the generator is controlled by the excitation grid-connected control system; the wind power system is in a box frame structure and comprises a fan blade system and a wind collecting and protecting system; the upper end and the lower end of a box frame are respectively provided with an upper shed top and a lower shed plate; the wind collecting and protecting system comprises a plurality of wind collecting plates which are distributed at four sides of the box frame and hydraulic drive equipment; the upper shed top, the lower shed plate and the wind collecting plates are connected to form a wind tunnel box type wind collecting body; the generator works in a multi-winding pole-changing control way; and the generator and the speed increaser are installed on the ground. The invention has the advantages of small size, low installation, maintenance and transportation cost, high wind power utilization ratio and wind field land utilization ratio, stable performance, high storm wind resistance and favorable power generating quality and grid-connected performance, can form a high-power wind power generator unit system and is suitable for various weather and geographic environments.

The invention provides a method for backing up data in real time based on a snapshot function of a storage array. The method comprises the following steps of: A, loading a source book of the storage array to an application server for storing a data file of the application server; B, generating a snapshot book of the source book by using the storage array; and C, establishing a mapping relation between the snapshot book and a backup server, and loading the snapshot book to the backup server. The invention also provides a system for backing up the data in real time based on the snapshot function of the storage array. By adoption of the scheme of the invention, a zero-backup window can be realized, resources of the application server can be greatly saved, and impact on the performance of the application server in a backup process cannot be caused.

The invention discloses a start-stop method for a unified power flow controller. A start process comprises the steps of placing a parallel-side transformer into a parallel-side converter for charging and then unlocking the parallel-side converter to control the direct current voltage to be stable; unlocking a serial-side converter, and controlling the current of a by-pass switch of the serial-side converter to be close to zero; disconnecting the by-pass switch to connect a serial-side transformer to a line in series, wherein the serial-side converter enters a normal operation mode when the line stably runs; and during stop, switching the control mode of the serial-side converter firstly to enable the by-pass switch to be switched on in vicinity of zero current, controlling the current of the serial-side transformer to be gradually reduced into zero and stop the serial-side transformer, and then locking the serial-side converter and the parallel-side converter and stopping the parallel-side transformer. By the start-stop method for the unified power flow controller, the direct current overvoltage and overcurrent of the converter can be effectively inhibited when the serial-side transformer is switched off, the compact of current oscillation of an alternating current line to the serial-side transformer is reduced, and stable start and stop of the unified power flow controller are realized.

The invention discloses a high-energy X-ray radiographic film changing robot, and relates to the technical field of high-energy X-ray nondestructive testing. The high-energy X-ray radiographic film changing robot comprises a movable vehicle, an openable screen film library, a mechanical gripper, movement mechanisms of the mechanical gripper and an electric control cabinet, and mechanical transmission, electric control, hydraulic control, pneumatic control and PLC (programmable logic control) functions are integrated in a system. Film holders are remotely and automatically switched by the system via a manual teaching technology, a remote control technology, an automatic zero calibration technology, a film library ray screen structure optimization design technology and an industrial robot technology. A plurality of industrial X-ray film holders can be stored at one step by the aid of the robot, films in the film holders can be effectively screened, and a series of automatic film changing actions such as grabbing the film holders and spatially positioning the film holders can be automatically completed under remote instruction operation actions according to an artificially taught movement track. The high-energy X-ray radiographic film changing robot has the advantages that the robot can replace operators to reliably and automatically switch the films under a high-energy X-ray condition, and the work efficiency is greatly improved.

Space linkage pressing the release mechanism, through a rope linkage link mechanism to achieve locking and unlocking the tightening rod.Under the premise of maintaining the unchanged mechanical interface of the original rod type, the lock -up and unlocking the original firework cutter with the rope link mechanism to achieve the unlocking function.The agency overcomes the traditional pressure release agency at each pressure point to use a firework cutter (or other release power sources) to achieve the unlocking function, so it can reduce a large number of spacecraft firework cutters (or other power source unlocking unlockingThe number of devices) reduces costs. At the same time, the agency has a low impact load when unlocked, does not generate excess objects, and can achieve multiple tightening points and unlocking function.

The invention relates to a piezoelectric hydraulic linear motor which pertains to the field of mechanical-electrical-hydraulic integration. An inlet of a piezoelectric pump is connected with an accumulator by a pipeline; the accumulator is also connected with a reversing valve by the pipeline; the reversing valve is connected with an outlet of the piezoelectric pump by the pipeline; the reversing valve is also connected with a cavity body of a hydraulic cylinder. The piezoelectric hydraulic linear motor has the advantages of novel structure, being capable of effectively converting the micro-amplitude reciprocating vibration of piezoelectric ceramic to the micro liner motion of a piston of the hydraulic cylinder by utilizing fluid media to transmit power, obtaining relatively large driving power and motion displacement and realizing precise driving and control by a method of accumulating a liquid drop for one time; meanwhile, the piezoelectric hydraulic motor has simple structure and control, small volume and good sealing property and can be applied to marking parts.

The invention discloses a hollow series-connection mechanical arm. The hollow series-connection mechanical arm comprises a plurality of modularized joints and a base, wherein the rotating end of the first modularized joint is vertically and rotationally connected with the base, the fixed end of the first modularized joint is fixedly connected with the rotating end of the second modularized joint, the fixed end of the second modularized joint is fixedly connected with one end of a first connecting arm, the other end of the first connecting arm is fixedly connected with the fixed end of the third modularized joint, the rotating end of the third modularized joint is fixedly connected with the fixed end of the fourth modularized joint, the rotating end of the fourth modularized joint is fixedly connected with one end of a second connecting arm, the other end of the second connecting arm is fixedly connected with the fixed end of the fifth modularized joint, and the rotating end of the fifth modularized joint is fixedly connected with the fixed end of the sixth modularized joint. The hollow series-connection mechanical arm of the structure is low in self weight, large in weight-power ratio, lower in energy consumption and simple in structure, and the self weight can be reduced easily.

The invention discloses an aircraft landing attitude alarming system and an alarming control method. The system comprises a first distance measurement module, a second distance measurement module, a third distance measurement module, a calculation control component, a display component, an alarming loudspeaker and an external interface, wherein the first to third distance measurement modules are connected with the calculation control component respectively; the calculation control component is connected with the display component and the alarming loudspeaker respectively. The aircraft landing attitude alarming system and the alarming control method have the beneficial effects that the real-time distance of an aircraft to the ground and pitching and inclination attitudes in a landing process can be directly displayed, and alarming information can be provided when normal range values are exceeded, so that the dependence of the landing process on the experiences of a pilot is remedied; the descending speed is calculated and displayed, so that excessive impact on the aircraft at the landing moment of the aircraft can further be prevented, the probability of occurrence of a major safety accident such as hard landing is lowered, and the flight safety of the aircraft controlled by various pilots with various qualifications and experiences in the whole landing process is effectively improved.

The present invention discloses a system and method for soft starting of an isolation direct-current converter applied to a direct current distribution network. After a direct-current converter is started, the H-bridge output square-wave voltage duty ratio of an input side is gradually increased from 0 to 0.5 according to a ramp function, and the time of setting the duty ratio from 0 to 0.5 is a starting time; after the direct-current converter is started, the H-bridge output square-wave voltage duty ratio of an output side is always 0.5, and the direct-current converter is started, in the starting time, output given voltage is gradually increased from 0 to a rated value according to the ramp function, and the changing of the output given voltage is consistent to the changing of the H-bridge output square-wave voltage duty ratio of the input side. Through cooperation control of the two methods, the current impact and direct voltage oscillation are effectively inhibited when starting, the system has a good anti-interference capacity and does not need additional circuits and starting resistors, and the starting logic is simple.

An embodiment of the present application discloses an image processing method, a device, a storage medium, and an electronic device. The method comprises the following steps of: acquiring an image ofa color mode of color brightness separation; performing scene recognition on the image to determine a scene of the image; traversing a luminance component of each pixel point in the image, and generating a luminance distribution of the image according to a traversal result of the luminance component; generating a brightness mapping relationship based on a standard brightness distribution corresponding to a scene of the image and a brightness distribution of the image; adjusting a luminance component of each pixel point in that image according to the luminance map relationship to generate a first processed image. By adopting the technical proposal, the embodiment of the present application can achieve the best effect for images of different scenes on the basis of ensuring that the images are not distorted, and the applicability of the image processing method is improved.

The invention discloses a temporary water retaining apparatus for rapidly handling the problem of water and mud bursting in a tunnel. The apparatus is provided with a water bag which is used for filling the inside with water for blocking gushing water or projecting mud soil generated in case of seepage in the tunnel and an air bag which is used for inflating air inwards for blocking the gushing water or the projecting mud soil generated in case of the seepage in the tunnel, and the water bag and the air bag are connected in an end-to-end manner and are connected through a flange connecting mechanism. The end, which is away from the air bag, of the water bag is respectively provided with a water filling port, a water pressure alarm for detecting water pressure inside the water bag and giving an alarm, and a front anchoring joint is disposed at the center for connection with an anchor pole or a fixation facility inside the tunnel. The end, which is close to the water bag, of the air bag is respectively provided with a gas injection port and a gas pressure alarm used for detecting gas pressure inside the air bag and giving an alarm, and a rear anchoring joint for connection with the anchor pole or the fixation facility in the tunnel is arranged at the center of the end, which is away from the water bag, of the air bag. The rubber bag capsule provided by the invention is simple in structure, convenient to manufacture and easy to operate, and can realize reutilization.

The invention discloses a low-speed high-pressure vane pump for hydraulic bicycles. The invention comprises an end cover, a principal axis, a framework oil seal, a right casing, a blade, a middle casing, a left casing, a bearing, an O-shaped sealing ring, a bolt, a pressure-limiting spring, a spring seat, a regulating nut, a side end cover, a rotor, a stator, a slide block, a cover plate, a flow adjusting screw, a sealing ring, a lock nut and a needle roller. The invention is characterized in that: a vane groove is arranged in the rotor, a vane spring and a vane bracket are arranged in the vane groove, the vane bracket is positioned by the vane spring, the blade is arranged in the vane groove of the rotor, one end of the blade presses the vane spring, while the other end clings to the inner surface of the stator. The low-speed high-pressure vane pump for the hydraulic bicycles has the advantages of reasonable structure, light self-weight, small bulk, high efficiency, low cost, labor conservation and rapidness, which is adopted to be matched with all wheel diameters of bicycles and has the function of pressure servo variation.

The invention provides a catalytic oxidation-compound flocculation integrated treatment process which aims to solve the problem that organic comprehensive waste water is difficult to treat because the organic comprehensive waste water contains organic substances difficult to biologically degrade. The treatment process integrates catalytic oxidation, Fenton oxidation, compound flocculation, high-efficiency precipitation and other technical advantages; a high-efficiency catalyst is used to improve the treatment efficiency or biodegradability; and a compound flocculant is used as the core to simplify the treatment process and ensure the stable treatment effect, thereby achieving the catalytic oxidation-compound flocculation integration. The invention has the characteristics of concise technical line, high treatment efficiency and simple operation process.

The invention provides an automobile dual-mass hydraulic torque converter which belongs to the technical field of machinery and solves the technical problem that the traditional hydraulic torque converter easily causes sympathetic vibration between an engine and a speed variator. The automobile dual-mass hydraulic torque converter is arranged between the engine and the speed variator and comprises a first-mass flywheel assembly and a second-mass hydraulic torque converter, wherein an elastic damping mechanism which can reduce the sympathetic vibration is arranged between the first-mass flywheel assembly and the second-mass hydraulic torque converter. The invention has the advantages of long service life and lower cost and can effectively reduce the sympathetic vibration between the engineand the speed variator.

The invention provides a wind direction tracking wind power generation simulating device, which can solve the problem that the prior art lacks a wind power generation test device used for experimental teaching. The invention has the technical scheme that the wind direction tracking wind power generation simulating device comprises a wind power generation system and a wind source system which are controlled by a control system, wherein the wind power generation system comprises a fixed column, the column is provided with a cross beam which can rotate around the column, and the cross beam is provided with a generator set consisting of impellers and a generator; and the wind source system comprises a windmill and a fan, and the windmill drives the fan to rotate around the wind power generation system. The invention simulates the actual wind power generation device via a lab device, can detect the coming direction of the wind in real time, automatically regulates the direction of the windward side of the generator blade according to the existing wind direction so as to make the blade always face the coming direction of the wind, transfers the existing wind energy into electric energy to the maximum extent, and fills the gap in the market when being used as a teaching instrument.