52 results about "Low speed" patented technology

An access server architecture, and methods for use of the architecture to increase the scalability of and balance processor load for a network access server device, are disclosed. In this architecture, packet forwarding and packet processing are distributed amongst cards serving low-speed access lines (i.e., line cards). Thus, as the number of line cards expands, forwarding resources are expanded in at least rough proportion. The NAS route switch controller and the high-speed ports used to access the network are largely relieved of packet processing tasks for traffic passing through the server. The egress port uses a distribution engine that performs the routing lookup for packets received at the high-speed interface, tags the packets with an adjacency table pointer, and sends them to the appropriate forwarding engine for packet processing. The route switch controller, largely uninvolved in the processing of packets, updates routing information needed by each distribution or forwarding engine.

In semiconductor devices in which both NMOS devices and PMOS devices are used to perform in different modes such as analog and digital modes, stress engineering is selectively applied to particular devices depending on their required operational modes. That is, the appropriate mechanical stress, i.e., tensile or compressive, can be applied to and/or removed from devices, i.e., NMOS and/or PMOS devices, based not only on their conductivity type, i.e., n-type or p-type, but also on their intended operational application, for example, analog/digital, low-voltage/high-voltage, high-speed/low-speed, noise-sensitive/noise-insensitive, etc. The result is that performance of individual devices is optimized based on the mode in which they operate. For example, mechanical stress can be applied to devices that operate in high-speed digital settings, while devices that operate in analog or RF signal settings, in which electrical noise such as flicker noise that may be introduced by applied stress may degrade performance, have no stress applied.

The invention provides a method for suppressing low-frequency vibration of a compressor and a system for suppressing low-frequency vibration of the compressor. Different from a moment control method for compensation aiming at loading moment in the prior art, the method based on pulsating loading moment includes the steps of controlling motor moment to a leading phase by means of presetting, and then computing leading phase determination of the motor moment by means of phase detection of velocity pulsation components and computing current commands for reducing vibration by means of velocity pulsation, so that real-time phase moment compensation is performed for the motor moment by means of the leading phase determination, and the current commands have a great effect on vibration suppression, particularly vibration suppression in low-speed operation. By the aid of the leading phase moment compensation technology of low frequencies of the variable-frequency compressor, vibration and pipe stress of the low-frequency compressor are reduced, and a null displacement state of a pipeline is achieved when the compressor is in ultralow-frequency operation, so that the refrigerating capacity of an air conditioner is expanded to a low-capacity side, and energy-saving and comfortable effects of variable frequencies are achieved.

The invention relates to a counter-flow flame combustion chamber which has a monocyclic cavity structure. The counter-flow flame combustion chamber is designed by adopting a concept of staged combustion, and combustion gas is supplied from a pre-combustion stage and a main combustion stage, wherein the pre-combustion stage adopts a diffusion combustion structural mode with stable whirlblast, and the main combustion stage adopts a combustion structural mode of combining premixing and pre-evaporation with counter-flow flame. The counter-flow flame combustion chamber mainly comprises a shunt diffuser, an external combustion chamber case shell, an internal combustion chamber case shell, a fuel nozzle, a head pre-combustion stage, a flame tube external wall main combustion stage, a flame tube internal wall main combustion stage, a flame tube external wall and a flame tube internal wall, wherein the head pre-combustion stage utilizes stable flame in a low-speed backflow area, which is generated by whirlblast air entering the combustion chamber from a pre-combustion stage whirlblast assembly; the main combustion stage comprises the flame tube internal wall main combustion stage and the flame tube external wall main combustion stage, and uniform oil-gas mixture jetted from the main combustion stage counters in a flame tube to form a counter jet flow which forms counter-flow flame under the ignition of pre-combustion flame. The invention has simple structure, and can effectively reduce disposal of pollutants besides ensuring the normal work condition of an aeroengine.

The invention discloses an energy feedback type self-sensing magnetorheological damper. The energy feedback type self-sensing magnetorheological damper is characterized by comprising a pure shearing type magnetorheological damper body, an energy feedback mechanism used for converting mechanical energy into electric energy, and a rotating speed sensor, the pure shearing type magnetorheological damper body converts linear movement of a linear magnetorheological damper piston rod into rotational movement by means of a ball screw pair mechanism, the shearing mode which is one of the working modes of magnetorheological liquid is effectively utilized, and stepless damping force controllability of the magnetorheological damper is achieved by arranging a shearing disc, a shearing ring and a corresponding electromagnetic coil. According to the energy feedback type self-sensing magnetorheological damper, by means of the shearing mode of the magnetorheological liquid, the range of dynamic damping ratios is effectively widened, and a more effective control range is provided for a high-speed impact and low-speed vibration control system; both the electric energy feedback performance and movement state self-sensing performance are realized, energy supply of a semi-active magnetorheological damper and the control system of the semi-active magnetorheological damper is achieved, and the problems, related to installation space, system weight, cost and reliability, caused by additional installation of a state feedback sensor are solved.

The invention discloses a neutron-resistant radiation shield plate and a preparation method thereof. The neutron-resistant radiation shield plate comprises the following components in parts by weight: 55-94 parts of polyolefins resin, 4-43 parts of boron carbide powder, 0.5-1.5 parts of a coupling agent, 0.5-1 part of an anti-oxidant and 0.5-2 parts of lubricant. The preparation method of the neutron-resistant radiation shield plate comprises the following steps: 1) batching a composite material, wherein components are added into a high-speed batching stirrer, firstly mixture at a low speed is performed for 30 s, and then mixture at a high speed is performed for 120-180 s; 2) fundamentally pelletizing the composite material, wherein a premixed material is added into a double-screw extruder, and is subjected to smelting, extrusion, cooling, grain cutting and packing to obtain a composite material for the neutron-resistant radiation shield plate; 3) forming the plate, wherein the pelletized composite material is dried, is smelted and extruded by a single-screw extruding machine, is shaped by three-roll pressing, is stretched, drawn and cooled, and then is cut to obtain the neutron-resistant radiation shield plate.

The invention discloses a CMOS image sensor dual-mode communication receiving system of an integrated photoelectric detector. The system comprises a CMOS image sensor of the integrated photoelectric detector, a 01 picture generation module, a threshold value generation module, a light source detection module, a gray image generation module, a high-speed communication signal processing module and a low-speed communication signal processing module. The CMOS image sensor of the integrated photoelectric detector outputs an image signal, a mark picture is generated through self-feedback by employing the threshold value generation module, the gray image generation module and the 01 picture generation module, a detected light source position is fed back to the CMOS image sensor of the integrated photoelectric detector via the light source detection module, a received communication signal is processed via the high-speed communication signal processing module and the low-speed communication processing module, high-speed communication information and low-speed communication information are outputted, and the reception of dual-mode communication is realized. According to the system disclosed by the invention, the accuracy of light source detection is effectively improved; and the system can be used in visible light communication.

The invention relates to a hybrid driving system, which comprises an internal-combustion engine, a first motor, a second motor, a power output shaft used for outputting power, a first brake, a second brake, a first transmission mechanism, and a second transmission mechanism. Two connected transmission mechanisms and brakes are arranged in the hybrid driving system. When the two brakes respectively brake, the two transmission mechanisms are in two different connection modes, namely two different transmission ratios (tap positions) are formed, therefore various working modes and corresponding tap positions can be selected according to different driving conditions of a vehicle, and driving requirements of the vehicle under different working conditions can be met further. Besides, by the adoption of the hybrid driving system provided by the invention, the low-speed torsion of the whole vehicle can be increased and the starting is quickened, moreover, the highest efficiency of the internal-combustion engine can be exerted under a high-speed condition, thereby promoting energy conversion efficiency, reducing tail gas emission and energy loss, and finally achieving the effects of low emission, low fuel consumption and high kinetic energy of the whole vehicle.

A brushless motor capable of high speed rotation by field weakening operation is designed to reduce torque ripple at a maximum load point with current phase advance so that the torque ripple at the maximum load point is 1 to 1.5 times the torque ripple at a low speed load point.

The invention relates to a control device for vehicle when vehicle is varying speed, providing a pedal speed-varying function when the transmission gear is not feeling the break of the drive force. At the same time of controlling the speed according to the transmission ratio of the speed varying by the planet gear mechanism when the vehicle is in a low speed, and controlling the speed according to the meshed transmission mechanism when the vehicle is in the high speed; when controlling the speed according to the meshed transmission mechanism, the invention controls the engine generating torque for the internal-combustion engine when processing the automated drive and the automated clutch to drive and control the electric node air valve.

The invention relates to a maze eddy folded plate flocculation pool, belonging to the field of water treatment equipment. The maze eddy folded plate flocculation pool comprises a reaction tank and multiple groups of folded plates, wherein the multiple groups of folded plates are arranged in the reaction tank; each folded plate is provided with ribs; speed controllers or V-shaped guide plates are arranged among the folded plates; and the speed controllers or V-shaped guide plates can lead water current to form controllable reaction speed gradients in the folded plates, and simultaneously a large amount of eddy is formed through the turbulent flow of the ribs. By combination of high speed and low speed, the collision probability of a flocculation reaction is increased, and the effect of theflocculation reaction is improved.

The invention relates to the technical field of highway construction, and discloses a soil sampling device for a highway engineering road and a using method thereof. The soil sampling device for the highway engineering road comprises a base and a sampling barrel; a supporting plate is fixedly installed on one side of the top of the base; the bottom of the sampling barrel is open; a sleeve plate is fixedly installed on one side of the sampling barrel; the sleeve plate sleeves the outer side of the supporting plate in a sliding mode; a motor is fixedly mounted at the top of the sampling barrel; a circular hole is formed in the top of the sampling barrel; a cylinder is rotatably mounted in the circular hole; a square hole is formed in the top end of the cylinder; a square rod is slidably mounted in the square hole; and a drill bit is arranged at the bottom end of the square rod. The device is reasonable in design, the drill bit is driven to rotate at a high speed and vibrate up and down while moving downwards at a low speed to drill holes in the ground, a hard soil layer can be conveniently drilled, manpower consumption is reduced, and drilled soil is conveyed into a collecting frame to be collected and stored, so automatic sampling of the soil is achieved, and the sampling work efficiency is improved.

The invention relates to a direct-drive composite permanent magnet motor with a magnetic transmission and dual-stator structure. According to the direct-drive composite permanent magnet motor with the magnetic transmission and dual-stator structure, a novel permanent magnet motor with a dual-stator hollow-rotor structure and a magnetic gear transmission technology are integrated so as to directly realize the mutual conversion of electric energy and low-revolving-speed large-torque mechanical energy, and the novel direct-drive composite permanent magnet motor can be widely applied to the wind power generation, hydraulic power generation, electric automobiles, ship drive and the field of transmission of other industries needing direct drive. The direct-drive composite permanent magnet motor is characterized in that an integrated structure is formed in a manner that a disk-shaped magnetic transmission gear pair I and a dual-stator-structure permanent magnet motor II are combined, the variable-speed transmission of high-speed and low-speed mechanical kinetic energies is realized by using the magnetic transmission gear pair I with transverse magnetic fields, the electromechanical energy conversion is realized by using the dual-stator-structure permanent magnet motor II with radial magnetic fields, a magnetic circuit structure is of a closed magnetic circuit which is formed in a manner that an inner stator and an outer stator are directly connected between two hetero-polarity permanent-magnet poles of a hollow rotor in series, the inner stator, the outer stator and the rotor are of a radial concentric structure, and two air gaps exist.

The invention relates to an alternating-current pole-changing three-speed three-phase induction motor. Two sets of three-phase windings are arranged on a stator of the induction motor; one set of three-phase stator winding has high-speed pole pairs p1 and medium-speed pole pairs p2, wherein for the high-speed pole pairs p1, the windings are in two-path star parallel connection (2Y), and for the medium-speed pole pairs p2, the windings are in triangular connection (triangle), and have 6 leading-out wire ends; the other set of three-phase stator winding has the medium-speed pole pairs p2 and low-speed pole pairs p3, wherein for the medium-speed pole pairs p2, the windings are in the triangular connection (triangle), and for the low-speed pole pairs p3, the windings are the two-path star parallel connection (2Y) and have 6 leading-out wire ends; and for the medium-speed pole pairs p2, the two sets of three-phase stator windings are in the triangular connection (triangle) and are connected in parallel, and the formed leading-out wire ends of the integral three-phase stator windings are nine. The alternating-current pole-changing three-speed three-phase induction motor has the high utilization rate and low temperature rise of winding conductors, reduces the loss, and is simple and convenient for pole-changing control.

The invention relates to a cloth cutting device of hole stitching machines, wherein period time is not lost and right pressing force is easily to be set.The cloth cutting device (30) comprises a knife (32), a knife receiver (31), a moving mechanism (35) which moves the knife (32) or the knife receiver (31), a pulse motor (34) which serves as a drive source of the movement of the knife or the knife receiver, a rotation amount detector (55) which detects a rotation amount of the pulse motor, and a controller (50) which controls the pulse motor.; The controller executes a control to switch the movement of the knife or the knife receiver to be low speed on its way, and includes a cutting control means (50c) which controls the pulse motor to stop driving if a deviation determining means determines that the deviation of the pulse motor reaches the set value, and a current control means (50c) which limits, during the low-speed movement, a current value applied to the pulse motor to be lower than that during a high-speed movement.

An image forming apparatus includes a power supply control unit that controls switching a power source to an auxiliary power supply that stores therein power from a main power supply when the main power supply is off, and to the main power supply when the main power supply is on; a detection unit that detects whether the power source is the main or the auxiliary power supply; a communication mode control unit that switches a data transfer rate from a first high-speed mode to a first low-speed mode allowing power consumption lower than the first high-speed mode when the power source is the auxiliary power supply; and a print mode control unit that switches a print speed from a second high-speed mode to a second low-speed mode allowing the power consumption lower than the second high-speed mode when the power source is the auxiliary power supply.

The invention discloses a transmission mechanism for realizing compound motion of rotation and torsional vibration based on transmission with few tooth differences. The motion input is realized by the eccentric shaft connected to the power source; the motion conversion mechanism is realized by the external gear that is free from the eccentric shaft and the internal gear that meshes with the external gear; the motion output mechanism is realized by the fork pin that is fixedly connected with the external gear 1. A compound motion output element with a shift fork slot plugged in with the shift fork pin is realized. Among them, the eccentric shaft, external gear, and internal gear form a standard transmission with few tooth differences, which converts the input rotary motion with a speed of n (rpm) into a low-speed revolution with a speed of n/i (rpm) and a speed of n (rpm), radius of gyration It is the high-speed rotary plane motion of e1; the fork pin and the compound motion output element realize the conversion of the compound motion of the external gear into the compound motion of rotation and torsional vibration and output it. Compared with the existing transmission scheme, the structure of the mechanism is greatly simplified, the matching range of motion parameters is wider, and it can be widely used in vibration tapping, vibration drilling, vibration grinding and other mechanical processing technical fields.

The invention discloses a Bluetooth BLE4.0 based infinite networking system. The system is used to form a cluster tree network; the cluster tree network comprises multiple cluster tree nodes; and each cluster tree node comprises a storage module, a sending module, a reception module, a verification module and a connection module, wherein the storage module stores the network characteristic number and information, the sending module sends and broadcasts the network characteristic number and information of the cluster tree node, the reception module receives the characteristic number and information from nodes in the same cluster tree network, the verification module verifies whether the network characteristic number received by the reception module is consistent with that of the node itself, and the cluster tree nodes of the same network characteristic number in the same cluster tree network are successively connected to form the network with the multiple nodes. The cluster tree network can support data interaction of low speed, low data bulk and low power consumption, and the method optimizes network management, simplifies the networking process and is high in networking speed.

The invention provides an LED (light-emitting diode) chip and a preparation method of the LED chip. The method comprises the steps of: providing a semiconductor substrate, arranging a Bragg reflecting layer, a luminous epitaxial structure, a window buffer layer and a window layer in sequence at the bottom surface of the semiconductor substrate in an epitaxial growth manner; fabricating a transparent conductive layer and a first electrode at the upper surface of the window layer in sequence; and fabricating a second electrode on the back side of the semiconductor substrate. Compared with the existing LED chip which uses a single window layer on the luminous epitaxial structure, the window buffer layer of which the material is the same as that of the window layer but the thickness is smaller than that of the window layer is added; and the epitaxial growth temperature and the epitaxial growth rate of the window buffer layer are smaller than those of the window layer. The quality defect of the window buffer layer is smaller than that of the window layer due to the epitaxial growth under a low-temperature and low-speed environment, so that the quality defect of the subsequently growing window layer is reduced, the purpose of reducing light absorption of the window layer when improving homogeneous diffusion of the current by the window layer is achieved, and further, the external quantum efficiency of the LED chip is improved.

The invention discloses an electric hydraulic power steering system, comprising a vehicle controller, a variable frequency controller, a motor, a hydraulic pump, a liquid storage tank and a steering gear; the vehicle controller, an energy storage mechanism and the motor are respectively and electrically connected with the variable frequency controller, the motor is in transmission connection with the hydraulic pump, an oil inlet of the hydraulic pump is connected with the liquid storage tank through a pipeline, an oil outlet of the hydraulic pump is connected with the steering gear through a pipeline. Further provided is a control method of the electric hydraulic power steering system. According to the electric hydraulic power steering system and the control method thereof, steering assistance is changed, energy can be saved, flexible steering can also be guaranteed for low-speed running of a vehicle, and the vehicle is steered stably during high-speed running.

The invention discloses an oil scraper ring, which comprises a circular body. An oil storage groove is formed in the upper end part of the body. The inner wall of the body is a scraping wall. The outer wall of the body is a retaining wall which is higher than the scraping wall. According to the scheme, the retaining wall is higher than the scraping wall, and when the oil scraper ring rotates along with a piston or a piston rod, lubricating oil in the oil storage groove can be prevented from being splashed from the oil storage groove under centrifugal force generated by rotation; and in addition, the bottom surface of the oil storage groove is an inclined surface, and the bottom surface close to the retaining wall is lower than the bottom surface close to the scraping wall, so that the center of gravity of the lubricating oil in the oil storage groove is close to the retaining wall, and the oil scraper ring difficultly rotates or rotates at low speed to favorably prevent the lubricating oil from being splashed from the oil storage groove. According to the scheme, scraped lubricating oil cannot flow out of the oil storage groove, so that the backflow of the lubricating oil is effectively prevented, and an oil leakage phenomenon is avoided to reduce the oil content of air in a piston type air compressor and ensure the purity of the air in the piston type air compressor.

The invention relates to a rubbish treatment system and method in order to solve the problem that low-cost rubbish treatment cannot be effectively conducted easily in the prior art. When the rubbish treatment method is used for treating rubbish, the rubbish manufactured by citizens is directly discharged into a municipal sewage pipe network after being smashed and is further scoured continuously by an intermittent siphon scouring and silting device, and accordingly pipeline silting can be prevented. The smashed rubbish is mixed into original municipal sewage and then is conveyed to a service reservoir through the municipal sewage pipe network, the rubbish is matched with farmer market rubbish collected to be made into sewage with the COD content and power of hydrogen being suitable for meeting the growing requirements of methane bacteria, part of organic matter in the sewage can be decomposed into biogas quickly after the sewage passes through a fast biogas digester, and biogas slurry which is not decomposed in the fast biogas digester is then conveyed into a low-speed biogas digester to be fully decomposed to produce a large amount of biogas in the low-speed biogas digester together with collected food waste. By means of the rubbish treatment system and method, the municipal rubbish and sewage can be recovered and treated to the greatest degree, and meanwhile the blocking problem of city sewer lines can be solved.

The invention discloses a magnetic coding permanent magnet synchronization method used for driving of an electric vehicle. The method is characterized in that the method includes following steps: when a motor shaft rotates, a magnet arranged at the head of the motor shaft performs circumferential magnetic field scanning on a magnetic encoder chip, and sensors uniformly distributed in the magnetic coding chip perform sampling on a circumferential magnetic field through a chip internal logic circuit. According to the method, the torque ripple is reduced to the minimum, since the identification position precision of the chip is high, the identifiable rotor position precision reaches +/-0.35 degree which is higher than that of the prior art, jittering can be prevented when the motor operates in a low speed, and high torque can be output.

The invention discloses a typical flexible member multi-collision test table. The typical flexible member multi-collision test table mainly comprises a test beam, a fixing device of the test beam, atypical flexible member such as a rod and a ball, a motion constraint device of the typical flexible member, a measuring device for beam surface micro displacement changes, a multi-collision measuring circuit and a laser vibration measurer, wherein the multi-collision measuring circuit and the laser vibration measurer are independent from a test table body structure. When the typical flexible member such as the rod and the ball collides with the test beam, test data are collected through a detecting device, and a multi-collision behavior in the low-speed collision process of the typical flexible members is studied. The members of the test table are located accurately, the test table works stably, and the test repeating accuracy is high; the test table has the advantages of being simple in structure, easy to adjust and the like.

A wheel speed measuring device for an aircraft braking system uses dual technology packaged in a single transducer that incorporates the robust and reliable variable reluctance technology along with a secondary package for measuring position and velocity bi-directionally for low speed and taxi operations. The transducer of the present invention is preferably incorporated into the envelope of the axle to allow both retrofit on existing aircraft and to maintain existing axle design and configuration.