5616 results about "Motor drive" patented technology

An electric power assisted steering assembly comprises a steering mechanism which operatively connects a steering wheel to the roadwheels of a vehicle, a torque sensing means adapted to produce a first output signal indicative of the torque carried by a portion of the steering mechanism, a means for producing a second output signal indicative from a signal indicative of the angular velocity of the portion of the steering mechanism, an electric motor operatively connected to the steering mechanism, a signal processing unit adapted to receive the two output signals and to produce therefrom an overall torque demand signal representative of a torque to be applied to the steering mechanism by the motor, and a motor drive stage adapted to provide a drive current to the motor responsive to the torque demand signal. The overall torque demand signal includes a damping component that is dependent upon the second output signal. The means for producing the yaw damping component includes a filter having one pole and one zero, and in use the second signal is passed through the filter to produce the damping component, the frequency of the pole and zero being selected such that the filter provides a band between the pole and zero within which the phase of the filtered second signal and the velocity signal are further out of phase or in phase than within the band.

The invention relates to a remote-control system of a stratospheric airship and a control method thereof. The control system is divided to four levels: a decision-making level for executing the selection and switch of a remote-control flight mode according to the actual working state data, and sending a corresponding mode command; a planning level for dynamically planning and generating an airship motor drive command according to the mode command sent by the decision-making level; an executing level for realizing the drive control to an airship motor according to the motor drive command of the planning level; and a perceiving level for finishing the real-time monitoring and data collection of the airship working state, and providing the original data of the airship working state to the decision-making level. The four-level control system architecture design of the control system is capable of simplifying the control device, improving the control efficiency, and fundamentally solving the problems of the function, efficiency and reliability of the near space airship ground and airborne control system.

The invention relates to a cutting path generation system based on visual positioning, cutting equipment and a cutting method. The system comprises a scanning camera control module, an image acquisition and recognition module, an image processing module, a cutting path planning module and a cutting control module. According to the system, by combining a Laplace algorithm and an LBP and GLCM texture extraction technology, the boundary recognition problem under the condition that a pattern and a background are in the same color or low contrast is solved; the path smoothness and the cutting quality are improved by adopting contour optimization and curvature compensation algorithms, the cutting sequence is optimized by combining weighting functions of the area, complexity and overlapping degree, and material deformation is reduced. And motor driving is dynamically adjusted through PID control, and stable control over the speed of the tool bit is achieved. The method has the advantages of being high in recognition precision, high in adaptability, intelligent in path planning and stable in cutting process, the automatic cutting efficiency and the finished product quality of complex patterns or same-color materials are remarkably improved, and the overall cutting precision fluctuation is controlled within + / -2%.

The invention relates to the technical field of casting equipment, in particular to a casting device for pump valve casting production, which comprises a conveying rack, a mold frame mounted on the conveying rack, and a sand injection station, the sand injection station comprises a mounting frame, a sand discharging mechanism mounted on the mounting frame and a tamping mechanism for tamping molding sand. According to the casting device for pump valve casting production, by arranging the discharging mechanism, when a motor drives a discharging roller to discharge materials in a feeding hopper, a screening disc can be synchronously driven to move up and down, and discharged molding sand is screened; meanwhile, when the molding sand falls on the screen, the middle of the screen is raised, so that the molding sand is more uniformly distributed in the mold frame; and meanwhile, the materials in the mold frame are preliminarily hammered and tamped.

The invention discloses a detection device and method for laser film production. Comprising a middle rotating shaft, upper and lower detection turntables, a middle assembly and a driving motor, the detection turntable is provided with a plurality of groups of laser detection heads, and outgoing lines of the laser detection heads are connected to a peripheral annular conductive track through a channel in the transfer shaft; an elastic shifting piece at a power leading end in a cavity of the middle assembly is in contact with the annular conductive track to realize rotary power transmission; the motor drives the middle rotating shaft to drive the detection turntable to rotate, so that the laser detection head scans the thickness of a film in a detection area between the turntables along a circumferential track; the detection rotating discs are connected through columnar discs, motor operation airflow is collected through internal annular air paths of the detection rotating discs, blowing airflow which is symmetrically divided and covers the film breadth is formed through peripheral airflow outlets, a detection area is synchronously cleaned, and static electricity is restrained. According to the invention, high-efficiency, high-precision and multi-channel online thickness measurement is realized, a self-cleaning function is integrated, and the problems of contradiction between efficiency and precision, high cleaning sensitivity and difficult production line expansion in the prior art are solved.

The invention discloses an automatic focusing control method based on a displacement sensor, and relates to the technical field of motion control, and the method comprises the steps: collecting a distance signal of a detection target, and converting the distance signal into a physical distance value through a calibration coefficient; the motion control card performs difference operation on the physical distance value and the standard focusing distance to obtain a position deviation value, performs data smoothing processing by using a Kalman filtering algorithm, establishes a state prediction model by using latest N frames of cache data, generates position compensation data, converts the position compensation data into a pulse control quantity, and when the pulse control quantity exceeds a preset threshold value, outputs the position compensation data; generating a motor driving instruction according to a PID control algorithm; and controlling the stepping motor driver to drive the lens assembly to perform position compensation according to the motor driving instruction, so that a standard focusing distance is kept between the lens assembly and the detection target. According to the invention, the problems of response lag and poor anti-interference capability in a traditional automatic focusing system are solved, and the dynamic response characteristic and the control precision of the system are improved.

The invention relates to the technical field of automobile film roll dividing and edge cutting, in particular to a slitting device for improving color changing film slitting precision and flatness, which comprises a mounting seat, two supporting plates are arranged at the top of the mounting seat, an auxiliary mechanism, a conveying mechanism and a mounting strip are sequentially arranged between the two supporting plates, and a sliding groove is formed in the bottom side of the mounting strip. A transmission lead screw is rotationally arranged in the sliding groove, a sliding block is in threaded engagement with the transmission lead screw, a cutting knife is arranged on the top side of the sliding block through a reciprocating assembly, a receding strip hole communicating with the sliding groove is formed in the top side of the mounting strip, a servo motor is arranged on the side wall of the supporting plate, and an output shaft of the servo motor rotationally penetrates into the sliding groove. The servo motor drives the transmission lead screw to rotate to be meshed with the sliding block and drives the cutting knife to move horizontally, and under the cooperation of the reciprocating assembly, the cutting knife moves vertically in a reciprocating mode and is matched with the cutting force of the cutting knife to cut the color changing film.

The invention relates to the technical field of galvanized sheet laser thickness measurement, in particular to a galvanized sheet laser thickness measurement device and method, which comprises a base, an overhead frame is fixedly mounted on the upper side of the base, a detection table is fixedly mounted on the overhead frame, and a fixing assembly is fixedly mounted on the inner wall of the detection table. A first-stage moving opening is formed in one side of the detection table, a thickness measuring assembly is slidably installed in the first-stage moving opening, and stable sliding rods are fixedly installed on the upper side and the lower side of the detection table; the output end of a cleaning motor drives a secondary driving threaded rod to rotate, the secondary driving threaded rod drives a cleaning moving block to move, the cleaning moving block drives a corresponding cleaning box to horizontally move through two transmission rods, and two driving blocks drive a corresponding reciprocating frame to reciprocate. And the cleaning scraper performs high-frequency staggered scraping, so that an oxide layer on the surface of the galvanized sheet is cleaned, and the accuracy of thickness measurement data is improved.

The invention is suitable for the field of motor driving and control, and provides a uniform demagnetization fault-tolerant control method and system for maintaining high-performance operation of a motor, and the method comprises the following steps: selecting a motor performance evaluation index sensitive to flux linkage information; determining a demagnetization inflection point of the motor according to the motor performance evaluation index, and setting a compensation strategy at the demagnetization inflection point to establish a demagnetization compensation model; continuously performing demagnetization control on the motor, recording a demagnetization inflection point and setting a compensation strategy at the demagnetization inflection point, establishing a demagnetization compensation model, and integrating the established demagnetization compensation model to obtain a multi-inflection point-multi-model database; obtaining motor performance real-time data through the established observer, querying the database to perform scheme matching in the demagnetization compensation model, and outputting a demagnetization compensation scheme of the motor; according to the method, the compensation model is built, the weakening condition of the motor performance is observed, the motor performance is restored to be normal, and demagnetization fault-tolerant control of motor performance maintenance is achieved.

The utility model relates to the technical field of screening, and discloses an anti-blocking step-by-step screening device which is characterized in that when a control assembly is arranged and an output shaft of a motor drives a rotating rod and a rotating disc to rotate, latches fixed on the surface of the rotating disc abut against a second rack to move; a horizontal rod fixed to the surface of a second rack is stressed to transversely slide in two sets of protruding blocks, when the horizontal rod moves, a transverse rod fixed to the surface of the horizontal rod can drive a first rack to slide on the surface of a gear, and the gear is stressed to drive a round rod and a disc to rotate on the surface of a fixing plate; a stirring plate fixed to the surface of the disc can synchronously stir on the surface of the first screening plate, materials gathered on the surface of the first screening plate are stirred, and the materials are evenly distributed on the surface of the first screening plate, in this way, substances with different particle sizes can be separated more meticulously, the screening precision is improved, meanwhile, compared with a directly-arranged inclined filtering plate, the screening efficiency is improved, and the screening efficiency is improved. And the condition of local material accumulation can be avoided.

According to the real-time clamping force zero point confirmation method, device and equipment and the readable storage medium, in a preset triggering scene, a motor of an EMB actuator is controlled to rotate in the forward clamping direction, motor rotation angle and torque parameters are synchronously collected in real time, and a motor rotation angle-torque curve is generated; according to the characteristic difference of the torque along with the change of the rotation angle before and after contact, selecting a preset calibration torque point on the rotation angle-torque curve, constructing a tangent line through the point, and positioning an intersection point of the tangent line and a motor rotation angle coordinate axis, the intersection point corresponding to a motor rotation angle reference in a contact critical state of a friction block and a brake disc; and the current zero point of the clamping force is obtained after the reference rotation angle is superposed with the comprehensive compensation amount. Accurate capture of a contact critical position is realized through real-time detection of motor rotation angle and torque and curve characteristic analysis, dynamic drift factors are adapted in combination with comprehensive compensation quantity, and zero point real-time updating can be automatically completed in the whole life cycle of the whole vehicle without depending on a fixed calibration value.

The invention belongs to the related technical field of welding, and particularly discloses an air energy water heater water tank inner container welding device which comprises a first machine base, a motor driving device, an industrial camera, a lifting machine and a second machine base, a lead screw loading table is arranged above one end of the first machine base, and a lead screw is rotationally arranged on the inner side of one end of the lead screw loading table; the lead screw is connected with an output shaft of the motor driving device, a sliding base is slidably installed outside the lead screw loading table and is in threaded fit with the lead screw, the lifting machine is arranged on the upper surface of the sliding base, a plasma welding gun is connected to the outer side of the lifting machine through an arranged movable frame rod, and the second machine base is arranged on one side of the outer wall of the first machine base. A pipe fixing mechanism is arranged on the upper surface of the second machine base, a frame base is arranged at the position, close to the middle, of the upper surface of the second machine base, and hanging and pulling mechanisms are arranged at the two ends in the frame base correspondingly.

The invention discloses a GIS-based emergency geographic information recording device, and relates to the technical field of geographic information recording, the GIS-based emergency geographic information recording device comprises a protection shell, a sealing cover plate is clamped at the top of the protection shell, a mounting plate is arranged in the protection shell, a folding mechanism is arranged in the protection shell and used for adjusting the angle of a protection box, and the GIS-based emergency geographic information recording device further comprises a scanning rotating mechanism, the motor is arranged at the bottom of the protection shell and drives the protection box to rotate. After information acquisition and recording are completed, a first electric push rod is started to drive a protection box and components in the protection box to descend, at the moment, a stepping motor drives a rotating table to rotate, when a fixing block rotates to an initial position, a displacement sensor sends a signal to a control panel, and at the moment, the control panel sends a signal to a second electric push rod; the second electric push rod extends out to drive the mounting seat to be folded towards the bottom of the protection shell, and the sealing cover plate covers the top of the protection shell, so that equipment in the protection box is protected and is prevented from being damaged.

The invention relates to the field of co-extrusion production control, and particularly discloses an efficient film bag feeding control system, which is applied to a multi-raw-material synchronous conveying device of a co-extrusion process, and comprises a full-link data acquisition module, a full-link data processing module and a full-link data processing module, the raw material characteristic parameters comprise a melting point T, a stacking density rho and a magnetic sensitive particle loading amount M; the instantaneous load pressure P of each raw material conveying channel, the temperature Tm of a co-extrusion die head melting area, the real-time thickness H of a co-extrusion film layer, stock bin liquid level data and motor rotating speed data are collected and integrated to obtain a full-link original data set; the single-drive linkage conveying mechanism comprises a main servo motor, a plurality of sets of electromagnetic clutches and a plurality of sets of spiral conveying assemblies, and the main servo motor drives a transmission shaft through a synchronous belt. According to the technical scheme, for the co-extrusion process, the multi-raw-material synchronous conveying precision can be matched, and the problems that parameter adjustment lags behind, adaptability is poor and a downstream process feedback closed loop is lacked are solved.

The invention relates to the technical field of gas analysis and detection instruments, and discloses a gas analysis and detection instrument which comprises a gas analysis and detection instrument body, a transverse adjusting piece is arranged above the gas analysis and detection instrument body, a transverse and longitudinal connecting piece is mounted on the transverse adjusting piece, and a longitudinal adjusting piece is connected to the bottom of the transverse and longitudinal connecting piece; wherein the gas analysis detector main body is in sliding connection with the front surface of the longitudinal adjusting piece, multi-dimensional accurate positioning of environmental gas sampling is realized, and the core advantage is reflected on a transverse adjusting system: a mechanical transmission mode of driving a threaded rotating rod by a servo motor is adopted, and dual guidance of a sliding rail and a limiting sliding block is matched, so that the positioning accuracy is improved; and the detector main body can stably move along the horizontal direction. Due to the unique combined design of the buffering device and the adjustable limiting mechanism, flexible buffering protection of the moving terminal point is achieved, and a user is allowed to customize the stroke range according to actual requirements.

The invention belongs to the technical field of low-voltage switch cabinets, and particularly relates to a low-voltage switch cabinet with a good on-off effect, which comprises a cabinet body, an exhaust cavity formed at the bottom of the cabinet body, an air exhaust box fixedly mounted at the top of the cabinet body, a filter screen plate mounted on the side wall of the air exhaust box, a plurality of drawers slidably connected in the cabinet body, and an auxiliary heat dissipation box fixedly connected to the back of the cabinet body. When a second motor drives a rotating shaft to rotate to adjust the position of a movable seat, the rotating shaft rotates to drive a linkage shaft to rotate through a belt ring and a belt pulley, the linkage shaft is meshed with one transmission shaft through a bevel gear, and therefore when the rotating shaft rotates, the annular dehumidification net can be driven to rotate through the transmission shaft; and the position of a drying agent arranged in the annular dehumidification net is adjusted, so that the dehumidification effect is improved, and the problems that air with relatively high humidity enters the cabinet body, easily corrodes electrical components and seriously affects the on-off effect of the electrical components are solved as much as possible.

The invention discloses a high-frequency motor drive multi-rate control method for time sequence disturbance compensation, and the core principle of the method is that low-rate disturbance compensation and a reference tracking trajectory are improved and converted into a time sequence processing process matched with a high-rate control instruction; specifically, a single disturbance compensation value which can be known only at a sampling moment Ts is expanded into time sequence prediction of disturbance changes on N control points in the future through a generalized proportional-integral observer; meanwhile, a low-frequency single reference instruction is constructed into a smooth high-frequency reference trajectory covering N control points through a Lagrange interpolation method, and closed-loop correction of disturbance compensation and reference tracking is achieved on each high-frequency control point Tc. The problem that open-loop prediction errors are continuously accumulated and spread due to mismatching of information updating rates in traditional multi-rate control is fundamentally solved, and therefore high-precision robust control over the high-frequency motor driving system is achieved.

The invention discloses detection equipment and method based on the basic diameter of a piston, and relates to the technical field of piston detection, the detection equipment comprises a mounting seat and a U-shaped frame mounted on one side of the mounting seat, and a distance measurement calibration piece is arranged on one side, away from the U-shaped frame, of a positioning seat. According to the device, the distance measurement calibration part is arranged, an infrared distance measurement sensor is started to measure the distance between a first calibration plate and one end of the infrared distance measurement sensor, and when a first servo motor drives a transmission shaft to rotate by 90 degrees, the first calibration plate moves to the inner side of a first storage bin; when the variable quantity of the numerical value on the infrared distance measuring sensor is equal to the distance between the first calibration plate and the second calibration plate, it is indicated that the infrared distance measuring sensor is in a normal operation state. In this way, the measurement data of the infrared distance measuring sensor can be calibrated, and the accuracy of the data detected by the infrared distance measuring sensor is further improved.

The utility model discloses a logistics loading and unloading device convenient to lift, relates to the technical field of loading and unloading devices, and provides the following scheme aiming at the problems that in the prior art, logistics loading and unloading goods often depend on manpower, so that a large number of personnel use is caused, and a large amount of cost is increased. Symmetrically distributed fixing rods are connected to one end of the top of the bottom plate, movable blocks are slidably connected to the rod walls of the fixing rods, and fixing blocks are fixed to the two sides of the other end of the top of the bottom plate. According to the loading and unloading height, the servo motor drives the adjusting block and the connecting frame which are in threaded connection to move up and down along the fixing frame through the lead screw, and the inclination angle of the conveyor is adjusted in cooperation with the rotating fit between the connecting frame and the conveyor and the sliding fit between the movable block and the fixing rod; objects are carried and conveyed through the conveyor, and when the objects are on the connecting frame, the objects are in rolling fit with the rotating rods, so that the objects can enter and exit from the conveyor conveniently.

The utility model relates to a polarized lens cut-in, cut-out and autorotation mechanism based on an optical camera, and aims to solve the problem that the imaging quality is influenced by stray light of the optical camera in a photoelectric pod in a complex environment and ensure the light incoming amount of the camera in a general environment. When the polarized lens cutting-in and cutting-out device works, the cutting-in and cutting-out motor drives the cutting-in and cutting-out driving gear to rotate so as to drive the target wheel and the self-rotating lens cone and the flat lens which are arranged on the target wheel to rotate, so that cutting-in and cutting-out of the polarized lens are realized; when the polarized lens is cut into a light path, the rotation driving motor drives the rotation driving gear to rotate so as to drive the transmission gear and further drive the rotation lens cone and the polarized lens installed in the rotation lens cone to rotate, thereby realizing rotation of the polarized lens.

The invention discloses an open-circuit fault diagnosis method for a motor driving system, and the method comprises the steps: constructing a fault index of each phase through mathematical transformation, filtering and sliding average processing according to a zero-state conservation equation of a multi-phase motor; according to the characteristic value expression of the fault index under the fault condition, a threshold value judgment method is designed; meanwhile, performing absolute value, average value and filtering processing on the fault index of each phase to construct a fault diagnosis index of an upper switch and a lower switch of each phase; and finally, integrating the upper and lower switch fault diagnosis indexes to obtain each phase fault flag variable, and combining the fault diagnosis table to obtain a fault diagnosis result of the multi-phase motor driver. In a fundamental wave period, the open-circuit fault position of the motor winding and the power device can be rapidly and accurately detected, the universality is high, the diagnosis precision is high, the algorithm is simple, the real-time performance is high, particularly, the robustness to non-sinusoidal current is high, and an effective basis is provided for further fault-tolerant control and system fault processing.

The invention discloses a dual-lens laser particle analyzer with an automatic calibration function. The dual-lens laser particle analyzer comprises a lead-in assembly, a shaking assembly and a mist brushing assembly, the introduction assembly is used for mixing and introducing to-be-measured particles and a water source, the shaking assembly is used for continuously shaking the particles of a to-be-measured mixed solution so as to ensure that the particles are uniformly dispersed, and the mist brushing assembly is used for brushing away mist which is generated on a lens due to too high humidity and interferes with the laser measurement degree. Through the combination of the first fixing plate, the first fixing shaft, the fixing ring and the torsional spring, the first sample pool can flexibly shake within a certain range, the motor drives the reciprocating lead screw to drive the toothed plate to move, the first sample pool can shake and swing, and through the continuous and diverse movement mode, the detection accuracy is improved. The uniform distribution of the particles in the solution is ensured, the interference of particle precipitation or aggregation on the measurement result is avoided, and the accuracy of measuring the particle size by the laser particle analyzer is obviously improved.

The invention discloses a product multi-surface appearance visual detection system and detection method. The detection system comprises a base, a cross beam transversely arranged on the base, a moving seat movably arranged on the cross beam, a clamping device arranged on the moving seat and used for adsorbing and clamping a product, and a first visual detection device arranged on the base and used for detecting the appearance of the back face of the product. The second visual inspection device is perpendicular to the first visual inspection device and located on one side of the first visual inspection device, the transverse driving mechanism is arranged on the cross beam, connected with the movable seat and used for driving the movable seat to move, and the clamping device adsorbs and clamps a product to move to the bottom face of the product to be opposite to the first visual inspection device. One side face is opposite to the second visual detection device; during detection, the rotating seat is driven by the rotating motor to rotate by 90 degrees for multiple times, appearance detection is performed on the four side surfaces of the product in sequence, operation is simple, the product does not need to be clamped again to replace a test surface, and the whole equipment occupies a small space and is suitable for being used in a scene with an effective equipment space.

The invention provides an efficiency optimization control method of a permanent magnet synchronous motor and related equipment. The method comprises the following steps: acquiring an output current of an inverter; constructing an inverter loss model based on the output current of the inverter and the inverter loss coefficient; constructing a total loss model based on the electromagnetic loss model, the inverter loss model and an equivalent conversion method; constructing a current population by taking the plurality of d-axis current values as individuals; and performing optimization solution based on the total loss model, the current population, a PID search algorithm and an artemisinin optimization algorithm to obtain a global optimal solution and control the permanent magnet synchronous motor. According to the scheme, the driver loss is added into the total loss model, and efficiency optimization can be carried out on the whole motor driving system; in order to solve the problem that a traditional method is not suitable for an IPMSM, a PID search algorithm and an artemisinin optimization algorithm are combined, parameter search is carried out on a motor efficiency optimal point by simulating an incremental PID controller adjusting mechanism, a global optimal solution is obtained, and therefore optimal control over the click efficiency is achieved.

The invention relates to the technical field of ore particle screening, and discloses high-recovery-rate micro-fine-particle magnetite ore dressing equipment which comprises a mounting frame, a protective shell is fixedly mounted on the mounting frame, a screening assembly is arranged on the protective shell, and the screening assembly comprises a three-way pipe. In order to enable the high-recovery-rate micro-fine-particle magnetic iron ore preparation equipment to be suitable for efficient separation of high-added-value micro-fine-particle iron ore, the screening assembly is arranged, the screening assembly is matched with a power motor to drive a large belt wheel through a small belt wheel and a transmission belt, an output shaft drives an auger rod to push ore in a three-way pipe, feeding blockage is avoided, and the high-recovery-rate micro-fine-particle magnetic iron ore preparation equipment is suitable for efficient separation of high-added-value micro-fine-particle iron ore. And meanwhile, a centrifugal motor drives a trilateral frame to drive a centrifugal screen drum to rotate at a high speed, fine particles fall into a discharging hopper through screen holes by utilizing centrifugal force, and coarse particles are discharged from a first discharging pipe through a mounting drum. And the stirring paddle rotates synchronously to prevent the fine particles from accumulating in the funnel.

A system for detecting diseases among plants includes a mobile device such as a smartphone, table, or personal computer, and a mobile robot which sends photographs of diseased plants to the mobile device including a plant name, disease type and location of the plant. The mobile robot includes a power supply, housing unit, camera, navigation unit, GPS unit, wireless transmitter, and traction unit for mobility of the robot. A geared motor drives the traction unit, and is connected to a low-level controller for motion control. A high-level controller is connected to the camera, navigation unit, GPS unit, and programmed with a convolutional neural network (CNN) configured to process images taken by the camera and associate with each image a plant type, disease type, and location of where the image was taken. The CNN may be a you only look once (YOLO) model trained with images from a dataset.

The utility model discloses a lens gluing device for optical lens production and processing, and relates to the technical field of lens gluing devices. Comprising a workbench and a lens body, a conveying mechanism is arranged at the top end of the workbench, a limiting frame is fixed to the top end of the workbench, a connecting port is formed in one side of the limiting frame, a collecting box is fixed to the top end of the workbench in a penetrating mode, and a dust suction cover is fixedly communicated with one side of the collecting box and located in the connecting port; a filter screen is fixed to the top end of the collecting frame. A lens body is placed in the limiting frame, then the first motor drives the rotating rod to rotate, the rotating rod rotates to drive the fan blades to rotate, dust on the surface of the lens body is sucked away and fed into the collecting box through the dust suction hood, then the collecting frame is pulled out, and the dust can be cleaned away conveniently; and dust is prevented from being attached to the surface of the lens body in the processing process to influence the light transmission performance of the lens.

The invention relates to the field of vibrating screens, and particularly discloses a vibrating screen and a screen plate thereof.The vibrating screen comprises a frame body, the frame body comprises two symmetrically-arranged side plates, two connecting plates are fixedly arranged between the two side plates, the two connecting plates are arranged at the two ends of the side plates, a screen is detachably connected between the two connecting plates, and the screen is formed by splicing a plurality of steel wire meshes; the steel wire mesh is in a wave shape in the length direction of the steel wire mesh, frames are fixedly arranged on the four edges of the steel wire mesh, the motor drives the vibrator to rotate so that the screen plate can vibrate, the moving stroke of materials on the wave-shaped screen mesh is prolonged through the wave-shaped screen mesh, and therefore the contact time of the materials and the screen mesh is prolonged, the screening duration of the materials is prolonged, and the screening effect of the materials is improved. And meanwhile, the screen mesh is detachably connected between the connecting plates, so that when the screen mesh is partially damaged, the screen mesh can be maintained by replacing a single steel wire mesh.

The utility model discloses a desulfurization device with angle-adjustable guide plates, which relates to the technical field of desulfurization devices, and comprises a desulfurization tower main body, the lower part of the desulfurization tower main body is provided with a smoke inlet, the desulfurization device drives a gear II and a driving rack through a self-cleaning guide mechanism and a starting motor so as to drive a plurality of guide plates to synchronously turn over, so that the guide plates can be synchronously turned over. When cleaning is needed, the first telescopic rod can be started to drive the movable frame to move and drive the scraping plate and the cleaning rod to move in a transmission mode, smoke impurities and dust particles on the flow guide plates are cleaned and scraped, and therefore the cleaning effect is improved. The influence on normal use of equipment due to blockage of a flue gas guide channel between the adjacent guide plates after long-term use is avoided, and the practicability is higher; and through a recovery plate, a telescopic rod II and a push plate, desulfurizer particles screened out from the flue gas can be pushed to a guide pipe and flow back into a desulfurizer pipe for reutilization.

The invention discloses an improved fan speed control optimization method, which belongs to the technical field of PID (Proportion Integration Differentiation) control optimization and comprises the specific steps of S1, constructing a fan speed control system; s2, improving a hyperbolic sine and cosine optimization algorithm; s3, performing parameter optimization on a PID controller module of the fan speed control system by using an improved hyperbolic sine and cosine optimization algorithm, and obtaining a group of optimal values of control parameters Kp, Ki and Kd under a set number of iterations; s4, inputting a group of optimal control parameters obtained through optimization in S3 into a PID controller module, and adjusting the speed of a fan to reach a target rotating speed by controlling a motor driving module; the PID controller parameters of the fan speed control system are optimized through the improved hyperbolic sine and cosine optimization algorithm, so that the control precision and robustness of the system are improved, and the adaptive capacity of the fan in different controlled scenes is enhanced.