22results about How to "Stable speed" patented technology

This utility model relates to the field of power machinery technology and discloses a centrifugal mechanical power enhancer, including a support frame with a symmetrical support structure. One end is fixed with a reinforcing part, and the other end is rotatably connected to a second gear disk. The middle section supports a drive device. The drive device, using a motor structure, is located at the lower part of the support frame and is connected to the drive shaft via a chain to provide initial rotational power. The reinforcing part, the core power enhancement unit, includes: a first gear disk, coaxially connected to a connecting shaft, with an inner gear ring meshing with a drive gear, and circumferentially distributed mounting positions for the iron-throwing parts on the outer side; a positioning disk, coaxially arranged with the gear disk and maintaining a distance, rotatably connected to the support frame via bearings, providing a reaction force fulcrum for the iron-throwing parts; and three symmetrically arranged iron-throwing parts, each containing a 24 kg iron-throwing body. This utility model features a compact structure, efficient transmission, and enhanced power through the cooperation of the iron-throwing parts and gear disks. The electrical control cabinet allows for precise adjustment, adapting to different loads and exhibiting strong stability.

The utility model belongs to high temperature friction coefficient test technical field especially for a kind of low-speed high-temperature environment with lubricating material friction coefficient testing device, including casing, bottom plate and base, casing is set in bottom plate upper portion, base is set in bottom plate lower portion;The top surface of bottom plate is respectively provided with horizontal key and vertical key, and force measurement driving assembly is also provided on the bottom surface of bottom plate;Supporting seat is provided on the mounting hole corresponding to horizontal key;The rear end of supporting seat is provided with motor base, and coupling is provided in the middle part of motor base;The end of coupling is connected with servo motor;The front end of supporting seat is provided with bearing, and supporting shaft is provided in the lower part of bearing;The front end of supporting shaft is also provided with test shaft;The front end of test shaft is provided with test assembly.The utility model can realize the standardization measurement of finished lubricating material sliding friction coefficient under low-speed high-temperature environment, solve the problem that traditional method cannot quantize test data.

This invention discloses a fully automatic linear control busbar bonding structure and method. The structure includes: a bonding pressure roller, a take-up roll, and a release roll mounted on a substrate; multiple reversing rollers on the substrate for adjusting the direction of the material roll / strip; a release roll for holding the material roll / strip; one end of the material roll / strip connecting to the take-up roll after passing through the multiple reversing rollers and the bonding pressure roller; the bonding pressure roller for pressing the material roll / strip closer to the electronic board; and a control module connected to a tension adjustment mechanism, a take-up motor, and a release motor, capable of adjusting the speeds of the take-up motor and the release motor. This fully automatic linear control busbar bonding structure utilizes the independent rotation of the take-up roll and the release roll to uniformly wind the material roll / strip onto the take-up roll. During the conveying process, the angle and position of the material roll / strip are adjusted by the multiple reversing rollers, facilitating the bonding pressure roller to bond the material roll / strip to the electronic board, ensuring high efficiency and high quality in busbar installation on the electronic board.

This invention provides a method and system for dynamic correction of a hoist under speed loop control, relating to the field of data processing. The method includes: acquiring the hoist car's descent information during cargo entry into the hoist car, and performing dynamic correction of the hoist's descent based on this information; collecting the real-time motor speed of the hoist during cargo transportation, and adjusting the phase current of the hoist motor based on the real-time motor speed and a preset motor speed; and acquiring the hoist car's lifting information during cargo exit from the hoist car, and performing dynamic correction of the hoist's lifting based on this information. This method has the advantage of improving the real-time performance and accuracy of hoist correction.

The invention relates to resistance measurement, in particular to the technical field of generator detection, and discloses a generator stator winding resistance testing device which comprises a base, a three-phase motor, a megohmmeter and a rotating motor are mounted on the base, and a rocker arm output shaft of the megohmmeter is fixedly connected with an output shaft of the rotating motor. The three-phase motor is provided with a winding portion, the winding portion is provided with a switching portion, the switching portion is provided with a lead portion, the base is provided with a support, the support is provided with an adjusting portion, the support is further provided with a control portion, the support is further provided with a case, the megohmmeter is provided with a conversion portion, and the megohmmeter is provided with a control portion. A microprocessor is arranged in the case, mechanical linkage of the switching part and the conversion part and control of the microprocessor are adopted, loop switching of U-V, V-W and W-U interphase tests and U-ground, V-ground and W-ground-to-ground tests is automatically completed, manual wire dismounting and wiring are not needed, automatic switching is achieved, and the test efficiency is improved.

This invention discloses a motor speed estimation method, apparatus, motor control method, and system based on Koopman operator error compensation. The method includes: calculating two speed test values ​​using backward differential and center differential methods respectively based on the rotor position signal acquired by the motor encoder; calculating the difference between the two speed test values ​​as the speed error value at the previous time step k-1; constructing a prediction input; predicting the speed error based on the Koopman operator K and the prediction input to obtain a predicted error value; calculating the motor speed prediction value based on the predicted error value and the speed test value; and updating the Koopman operator at the next time step. Compared with existing technologies, this invention has strong engineering adaptability, is suitable for high-dynamic motor control systems, and has high detection accuracy.

The present application provides a kind of outside environment recognition device, which stably exports the speed of stereoscopic object.The outside environment recognition device (120) has: stereoscopic speed export part (160), which exports the speed of predetermined stereoscopic object based on the distance image exported from the luminance image of two shooting devices (110) and is extracted;Monocular speed export part (162), which exports the speed of stereoscopic object based on the luminance image of one shooting device (110) and is extracted;Predicted speed export part (164), which exports the current speed of stereoscopic object based on the past speed of stereoscopic object and is predicted;Mixing ratio export part (166), which exports the mixing ratio of stereoscopic speed, monocular speed and predicted speed;And object speed export part (168), which exports the object speed representing the speed of stereoscopic object by mixing stereoscopic speed, monocular speed and predicted speed based on mixing ratio.

The utility model discloses a floating cutter head shaver, including fuselage and the cutter head of being located at the top of fuselage, there is power assembly in the fuselage output rotary driving force, and the cutter head includes shell head, inner blade and knife net, and the inner blade is driven to rotate shaving by power assembly, and can float up and down, the buckle connection of shell head is connected in the knife net frame, and the knife net frame has spherical recess, and the knife net includes spherical base body and net face part, and the spherical base body is suitable for the configuration in the spherical recess, and can universal deflection, and the floating support is installed on the knife net frame, and the floating support has annular base body and a plurality of elastic sheets, and the annular base body is opened long slot hole at the corresponding elastic sheet, and one end of elastic sheet is connected long slot hole hole wall, and the other end is inclined to the upper abutment spherical base body stop ring, and through the deformation of elastic sheet, the displacement of knife net deflection is adapted and resets, and the shell head cover is outside the knife net, and has the cutter lip that exposes net face part, and restricts the knife net to the spherical recess and separates upward. The shaver is through the up and down floating of inner blade, and the knife net universal deflection adapts the facial profile curved surface, and the knife net is more close to the skin when shaving, and the shaven cleanliness is improved.

The application discloses a dynamic slip vector control method for eccentric large-inertia load of an asynchronous motor, and comprises the following steps: an operation vector equation of the asynchronous motor is as follows: a voltage steady-state equation: S1, Usd=Rs*isd-omega1*(Ls*Lr-Lm2) / Lr*isq; S2, Usq=Rs*isq+omega1*(Ls*Lr-Lm2) / Lr*isd+omega1*Lm / Lr*psi r, wherein, Usd and Usq are d-axis and q-axis voltages of a stator, isd and isq are d-axis and q-axis target currents of the stator, Rs and Ls are a stator resistance and inductance, omega1 is a synchronous frequency of the stator, psi r is a total rotor flux, Lr is a rotor inductance, and Lm is mutual inductance; and the application patent of the variable-slip vector control method for the eccentric large-inertia load of the asynchronous motor can effectively solve the problem of the coordination relationship among the gravity eccentric load acceleration / deceleration starting, constant-speed energy saving and constant-speed speed stability through the dynamic slip compensation control.

The application discloses a pinch roll tension current limiting control method, and relates to the field of steel production, and solves the technical problem that a large deviation is caused between feedback speed and set speed of the existing pinch roll. It comprises the following steps: step one, collecting the roll diameter of the pinch roll; step two, collecting the real-time tension current of the pinch roll; step three, collecting the real-time torque of the pinch roll; step four, limiting control of the real-time tension current of the pinch roll; step five, displaying the limiting control of the real-time tension current of the pinch roll; step six, obtaining the speed difference value in the rolling process of the pinch roll; and step seven, precisely quantifying and superimposing the control of the roll gap of the pinch roll in the rolling process. The application further discloses a pinch roll tension current limiting control system. The application can reduce accident time, improve production output and the finished product rate index.

The utility model relates to a kind of axial flow variable pitch unit driving device and axial flow variable pitch unit, belong to axial flow variable pitch unit technical field, the axial flow variable pitch unit driving device includes reduction mechanism, gear set and shaft coupling, the reduction mechanism is connected through the gear set and the shaft coupling, the shaft coupling is connected with the upper end portion of the rotating shaft;The gear set includes pinion and large gear of different diameters, the pinion and the large gear are engaged arrangement;The pinion is connected with the output shaft of the reduction mechanism, and the large gear is connected with the shaft coupling.The utility model realizes the driving of the rotating shaft of axial flow variable pitch unit, realizes the adjustment of rotating shaft, avoids the interference to the operating oil pipe in rotating shaft;The utility model does not need manual adjustment rotating shaft by artificial, improves work efficiency.

The utility model relates to flue gas purification technical field discloses waste gas quenching and deacidification device, including support frame, deacidification structure, spray structure and filter structure, the spray structure sets up in deacidification structure, the filter structure sets up in the bottom of deacidification structure, the utility model discloses being set up in the spray structure, the motor drives the stirring vane to agitate in the box through the pivot, will drive the cam rotation when, the cam and fixed wheel contact compression spring, and fixed wheel passes through fixed plate and drag link piston in fixed cylinder sliding is driven, when the cam is far from fixed wheel, spring reset makes piston reset, thereby makes piston reciprocating motion in fixed cylinder, thereby continuously transports lye in the liquid storage tank to atomizing nozzle, then sprays, and the stirring vane mixes fully with waste gas and lye, reduced the dependence on external pump system, reduced the complexity and maintenance cost of equipment, and the reciprocating motion of piston makes the speed stability of lye delivery to atomizing nozzle.

This utility model discloses a top-mounted, adjustable-speed rotary pencil sharpener, including a support cover, a pencil holder on the support cover, a support gear below the support cover, and a pair of support shafts inside the support cover. A start switch and a PCB circuit board are connected to the pencil holder on one side. The PCB circuit board is connected to the motor circuit, and the motor is connected to the support gear via a gear set. A blade holder is located below the support gear, and an adjustment component for adjusting the pencil tip thickness is located below the blade holder. The pencil tip thickness is controlled by the up-and-down movement of the adjustment rod via a seesaw structure. When the pencil tip reaches the top of the adjustment rod, the PCB circuit board controls the motor to reverse and retract the pencil. The closer distance between the motor and the blade assembly results in less motor power loss, a more compact connection structure with less mechanical friction noise, more stable motor speed, and a more stable center of gravity. The bottom shavings box design allows for a larger shavings capacity and easier cleaning.

The application belongs to the technical field of unmanned aerial vehicle control. An unmanned aerial vehicle autonomous tracking method and system based on monocular vision are provided. The target unmanned aerial vehicle image captured by the monocular camera of the tracking unmanned aerial vehicle is obtained, and the three-dimensional space coordinates and the current relative speed of the target unmanned aerial vehicle are determined according to the target unmanned aerial vehicle image. The image error vector is calculated according to the three-dimensional space coordinates. According to the three-dimensional space coordinates and the current relative speed, the current relative speed is optimized by using the Kalman filtering algorithm to obtain the optimized current relative speed, and the position error vector is determined according to the optimized current relative speed. According to the image error vector and the position error vector, the fusion control input vector is determined, and according to the fusion control input vector and the current relative speed, the updated relative speed is determined for tracking the tracking unmanned aerial vehicle. The application greatly improves the control accuracy of the unmanned aerial vehicle autonomous tracking.

This invention belongs to the technical field of valve processing equipment, and particularly relates to a welding machine for valve processing, including a machine body, on which a control center and a feeding mechanism are integrated; it also includes a welding head mechanism, which is mounted on the machine body through the feeding mechanism and can achieve independent longitudinal and transverse feeding movements under the drive of the feeding mechanism. Compared with the prior art, this invention effectively improves the adjustment dimensions and welding quality of the welding machine for valve processing.

This invention discloses a thermometer fixture suitable for transient processes in cryogenic systems, comprising a front guide tube, a rear guide tube, and a temperature measuring block with a temperature sensor mounting interface. The first end of the front guide tube and the first end of the rear guide tube are respectively connected to process piping, and the second ends of the front guide tube and the rear guide tube are respectively connected to the temperature measuring block. A heat exchange channel is formed inside the temperature measuring block, which communicates with the internal channels of the front and rear guide tubes to form a through-flow fluid channel. The fluid being measured can flow through the heat exchange channel and exchange heat with the temperature measuring block. This invention employs a through-flow structural design, combined with a temperature measuring block made of high thermal conductivity material and an optimized flow channel structure, significantly reducing the thermal inertia and thermal resistance of the temperature measuring system and improving the transient thermal response speed. It is particularly suitable for temperature measurement in cryogenic transient conditions such as superconducting cryogenic systems and modular hydrogen liquefaction equipment in the 20–30 K temperature range.

This utility model belongs to the technical field of cooking equipment, specifically a civilian alcohol-based liquid fuel atomizing nozzle. It includes a main body, comprising a sleeve and a mounting block. One end of the sleeve is fixedly connected to the mounting block, and a positioning block is set inside. The positioning block has a locking hole and a first air passage. The other end has a nozzle. A spindle is installed inside the sleeve, forming a first air chamber between the spindle and the sleeve. One end of the spindle is located inside the locking hole, and the other end is located inside the nozzle. A second air chamber is formed between the spindle and the inner wall of the nozzle. An oil passage is provided inside the spindle. The side wall of the mounting block has an oil pipe connection hole and an air pipe connection hole. Inside, there is an oil delivery hole connecting the oil passage and the oil pipe connection hole, and a second air passage connected to the first air passage. The air pipe connection hole is connected to the first air chamber through the first and second air passages. This nozzle is less prone to clogging, easy to clean, and improves the atomization and spray stability of the civilian alcohol-based liquid fuel, enhancing the flame stability when the stove is on low heat.

This invention proposes a method and system for intersection recognition based on multiple features of crowdsourced trajectory data, relating to the technical field of intersection recognition. The method includes: collecting crowdsourced vehicle trajectory data covering a target road area to obtain trajectory vector data; cropping the trajectory vector data to retain the target trajectory vector data; spatially rasterizing the target study area, mapping trajectory points to two-dimensional raster cells to construct multi-channel trajectory feature raster data; spatially aligning and overlaying multiple sets of multi-channel trajectory feature raster data; selecting multiple sample collection areas from the obtained unified multi-channel trajectory feature raster data; labeling the intersections within each sample collection area to form a sample dataset; and supervising the training of an intersection recognition model based on the sample dataset to obtain intersection recognition results and performance evaluation metrics. This application helps improve the accuracy and stability of intersection recognition.

This invention provides a non-road mobile machinery walking system and a control method based thereon, relating to the field of non-road machinery. The output shaft of the gear shift transmission is connected to the rear axle. The gear shift transmission includes gear positions and hydraulic shift forks and shift synchronizers adapted to the gear positions. The oil ports of the hydraulic motor are respectively connected to the oil ports of the hydraulic pump. The input end of the controller is connected to the shift switch, speed sensor one, and speed sensor two, and the output end is connected to the electromagnetic bypass valve, the hydraulic control valve, and the hydraulic pump. This invention adds an electromagnetic bypass valve between the two oil ports of the hydraulic motor. Through the shift signal and the signals fed back to the controller from the speed sensor one of the engine output shaft and the speed sensor two of the gear shift transmission output shaft, the hydraulic shift fork is controlled to engage the shift synchronizer with the shifted gear. After engagement, the output displacement of the hydraulic pump is adjusted by the controller to achieve non-stop gear shifting of the non-road machinery.

This utility model relates to a material feeding device in fracturing operations, including a base and a fixed column. A movable column is slidably inserted into the fixed column, and a rack is embedded in the movable column. An L-shaped plate is formed on the front of the fixed column, and a gear is slidably inserted into the L-shaped plate. The gear is connected to a motor and meshes with the rack. A fixed plate is fixed to the top of the movable column, and a connecting column is fixed to the top of the fixed plate. A placement plate is fixed to the top of the connecting column, and a feeding plate is hinged to one side of the placement plate. Sliding grooves are formed on both sides of the connecting column, and an L-shaped column is slidably inserted into the grooves. The L-shaped column is located above the fixed plate. An electric push rod is installed on the back of the L-shaped column, and a connecting block is hinged to one side of the L-shaped column. The end of the connecting block away from the L-shaped column is fixedly connected to one end of the placement plate. This utility model allows for adjustment of the operating height and facilitates adjustment of the feeding angle, thereby ensuring uniform dispersion of materials in fracturing fluid.

This invention discloses an ultra-wide width EPE foam and its preparation method. The ultra-wide width EPE foam, by weight, is composed of 100-155 parts resin matrix, 1-3 parts nucleating agent, 10-19 parts modified calcium carbonate, 10-20 parts foaming agent, and 10-25 parts additives. The specific preparation steps are as follows: Step 1, material preparation and mixing; Step 2, initial mixing; Step 3, foaming agent injection; Step 4, blending; Step 5, foaming; Step 6, cooling and shaping; Step 7, winding and forming. This invention, through formula adjustment, molding process optimization, and equipment innovation, utilizes a twin-screw extruder to achieve extrusion molding, effectively overcoming the process limitations of traditional wide width EPE foam preparation, improving product quality stability and production efficiency, and laying the foundation for its large-scale application in multiple fields. The product can be widely used in the packaging industry, construction industry, automotive interiors, and many other fields.

The application provides a rotating speed stabilizing device, a compressor and a refrigerator. The rotating speed stabilizing device comprises: a counterweight; a connecting piece for connecting with a rotor of the compressor, the connecting piece having a connecting state of being connected with the counterweight and a separation state of being separated from the counterweight, and the connecting piece is switchably arranged between the connecting state and the separation state. The rotating speed stabilizing device solves the problem of low rotating speed stability of the transmission assembly in the compressor in the prior art.