324results about How to "Save adjustment time" patented technology

The invention provides a photovoltaic VSG control method based on virtual inertia and damping, and the method comprises the steps: designing a topological structure of a photovoltaic virtual synchronous generator for modeling, and obtaining a power and power angle equation of the virtual synchronous generator; constructing a function expression of the active power of the virtual synchronous generator and combining the function expression with a power and power angle equation of the virtual synchronous generator to obtain a second-order transfer function so as to obtain a step response curve of the output power and the angular frequency of the virtual synchronous generator; secondly, analyzing an influence mechanism of changes of virtual inertia and damping on the dynamic performance of the virtual synchronous generator based on a step response curve, obtaining self-adaptive principles of the virtual inertia and damping in different states based on the influence mechanism to construct a self-adaptive function, and finally setting parameters in the self-adaptive function and designing a starting criterion. Therefore, the photovoltaic virtual synchronous generator can be controlled. Compared with the prior art, the fluctuation of power and frequency can be better suppressed, and the stability of the system is improved.

The utility model relates to the field of automobile manufacturing, in particular to an automobile head anti-collision beam bending forming tool which comprises a product upper portion pressing mechanism and a support, a rotating shaft is arranged in the middle of the support, the rotating shaft and a swing block are coaxially fixed, and a swing block sliding seat is fixed to the portion, on the upper side of the rotating shaft, of the support. Reset tension springs are connected between the two sides of the swing block sliding seat and the corresponding lower swing blocks, and lower pressing plates are fixed to the bottom faces of the swing blocks. The lower product forming die is matched with the upper product pressing mechanism, is of an arc-shaped structure and is mounted on the die fixing seat, and a fixed product is mounted on the surface of the upper product pressing mechanism; according to the device in the prior art, as positioning or clamping mechanisms are not arranged in the middle and on the two sides of a product during machining, the middle of the product is prone to concave or convex deformation when the product is bent; the problem that the product is unqualified due to the fact that the processing parts on the two sides of the product are prone to asymmetric bending deformation is solved; and the problem that the adjustability is poor due to the fact that processing detail parameters cannot be adjusted by a pressing block is solved.

The invention relates to a control system and a control algorithm for improving the stability of a laser direction, and discloses a fast reflector control system and algorithm based on a bidirectional recurrent neural network fusing a self-attention mechanism and PID (Proportion Integration Differentiation) control. The core of the invention lies in that neural network prediction and PID control are innovatively combined to form an intelligent prediction-feedback control system. According to the system, a bidirectional recurrent neural network based on a self-attention mechanism is adopted for prediction, a comprehensive error concept is introduced to fuse an actual error and a prediction error, and intelligent self-adaptive adjustment of PID parameters is achieved. The system can significantly improve the precision of laser beam direction control, the anti-interference capability and the dynamic response speed, and has a wide application prospect.

The invention discloses metal cable protection tube processing equipment, and relates to the technical field of cable protection tube processing, the metal cable protection tube processing equipment comprises an L-shaped fixing plate, the L-shaped fixing plate is provided with a metal cable protection tube, the top of the L-shaped fixing plate is provided with an adaptive assembly, and the adaptive assembly comprises a stepping motor fixedly connected to the top of the L-shaped fixing plate; and the output shaft end of the stepping motor is fixedly connected with a rotating column I. Through the arrangement of the adaption assembly, the device can adapt to metal cable protection pipes with different pipe diameters, so that corresponding grinding work is completed, and different grinding devices do not need to be frequently replaced to adapt to the metal cable protection pipes with different pipe diameters; compared with the prior art, the grinding device has the advantages that the adjusting and replacing time of the grinding device is saved, metal cable protection pipes with various pipe diameters can be quickly and continuously ground, the working interruption time is shortened, the overall working efficiency is improved, meanwhile, the fitting degree of the grinding tool and the surface of a cable can be better guaranteed through the adaptation assembly, grinding is more uniform, and the grinding quality is improved.

The invention provides multifunctional ophthalmology intelligent examination equipment which comprises a base and an examination equipment body. The front side of the examination equipment body is connected with a chin support and a forehead support through supports. First teeth are evenly arranged on the opposite side walls of the quadrangular prism, first tooth blocks are slidably arranged in the first sliding grooves respectively, a first driving assembly is arranged on the chin support, and a positioning assembly is arranged on the forehead support; fixing columns are arranged on the two sides of the chin support respectively, the opposite side walls of the fixing columns are connected with fixing sleeves through elastic telescopic pieces respectively, second telescopic disinfection blocks are arranged at the upper ends of the inner rods respectively, make contact with the working face of the forehead support and slide in the length direction, and first telescopic disinfection blocks are arranged at the lower ends of the opposite side walls of the sleeves respectively. A second driving assembly is arranged at the lower end of the chin support. The heights of the chin support and the forehead support can be conveniently and rapidly adjusted, and the examination efficiency is improved; disinfection is convenient, fast, timely, clean and sanitary, the experience feeling of a patient is improved, and cross infection is effectively avoided; and the system is connected with the Internet, so that doctors can diagnose conditions timely.

The invention discloses an intelligent crankshaft machining machine tool, and relates to the technical field of crankshaft multi-station machining. Grooving and mounting are integrated, machining of different steps is achieved through station switching, the problem that time is wasted due to continuous switching of workpieces is solved, the machining efficiency is improved, multiple gears are mounted outside a crankshaft at a time through the multi-gear mounting mechanism, the multiple gears are heated, cooled and mounted at the same time, and the machining efficiency is improved. Batched heating, cooling and mounting are not needed, the mounting efficiency of the multi-gear crankshaft is greatly improved, the gears are automatically rotated, the clamping grooves of the gears are in butt joint with the protrusions, the positions of the clamping grooves do not need to be manually adjusted when the gears are placed, the adjusting time is shortened through automatic adjustment, the mounting efficiency is improved, and the mounting efficiency is improved. The gear is heated before being mounted, the inner diameter of the gear is increased, butt joint mounting of the gear is facilitated, and the problem that mounting is difficult due to slight dislocation during automatic butt joint is solved.

The invention discloses a carrier tape production line and a production method, and belongs to the field of carrier tapes. The carrier tape production line comprises a composite extruder, an automatic adjusting type carrier tape forming machine, processing equipment and a winding machine; the automatic adjusting type carrier tape forming machine comprises a first position automatic adjusting assembly, a first machine table, a forming roller assembly, a roller type flattening assembly, a second position automatic adjusting assembly, a hot air gun, a guide wheel, a controller and a display screen, and the first machine table is arranged at the adjusting end of the first position automatic adjusting assembly; the hot air gun is arranged at the adjusting end of the second position automatic adjusting assembly, the roller type flattening assembly comprises a fixed roller set and an adjustable roller set which are oppositely arranged, and the adjustable roller set is provided with a third position automatic adjusting assembly. The first position automatic adjusting assembly, the forming roller assembly, the roller type flattening assembly, the second position automatic adjusting assembly and the hot air gun are all electrically connected with the controller, and the controller is electrically connected with the display screen. The overall carrier tape production efficiency and the product quality are high.

The utility model discloses an automatic lifting tool setting device, which relates to the field of tool setting devices and comprises a mounting table, an adjusting cylinder is mounted at the bottom of the mounting table, an air cylinder is mounted at the end of the adjusting cylinder, a lifting cylinder is sleeved on the outer wall of the adjusting cylinder, and a first mounting seat is fixed at the top of the mounting table. And a first motor is mounted on one side of the first mounting base, a first lead screw is mounted at the output end of the first motor, and a second mounting base is movably mounted above the first mounting base. A traditional manual tool setting mode is replaced, the automatic lifting function is achieved through the air cylinder, the tool setting device can achieve automatic tool position adjustment, manual operation and intervention are reduced, the overall automation level is improved, and the machining process is more efficient and accurate; due to the automatic lifting function, lifting and positioning of the tool can be completed within a shorter time, the tool changing and adjusting time is saved, and therefore the overall machining efficiency is improved.

The invention discloses an operating shadowless lamp automatic control system and method based on radar induction, and belongs to the technical field of automatic control systems.The operating shadowless lamp automatic control system collects operating data of doctors, analyzes complex operating conditions of the doctors according to the operating data of the doctors, collects operating information of the patients, and controls the operating shadowless lamp according to the operating information. The method comprises the following steps: analyzing patient operation complex conditions according to patient operation information, matching the initial brightness of an operation shadowless lamp according to the patient operation complex conditions and doctor operation complex conditions, collecting operating room illumination data, and analyzing illumination influence conditions according to the operating room illumination data; according to the method, the complexity of an operation is comprehensively analyzed according to the operation condition of a doctor and the operation condition of a patient, the initial brightness is matched, the optimal illumination condition is analyzed in combination with auxiliary illumination and the reflection influence of equipment, the operation shadowless lamp is automatically controlled and adjusted to the optimal brightness, and the brightness of the operation shadowless lamp is adjusted to the optimal brightness. The adjustment precision can be improved, so that the operation efficiency of doctors is improved.

The utility model discloses an inserting device of a ton barrel metal frame, which belongs to the field of ton barrel frame processing, and comprises a working table, a pipe pitch adjusting mechanism is arranged on the top surface of the working table, and the pipe pitch adjusting mechanism comprises a hydraulic cylinder fixedly connected to the top surface of the working table. The hydraulic cylinder is fixedly connected with one side of the fixing plate, the telescopic end of the hydraulic cylinder is fixedly connected with a movable sliding rail, an inner groove of the movable sliding rail is slidably connected with a plurality of limiting blocks, a plurality of limiting grooves are formed in the top end of the fixing plate in a penetrating mode, and the limiting blocks are slidably connected with the limiting grooves respectively. The ends, away from the movable sliding rails, of the limiting blocks are fixedly connected with telescopic rods, the sides, away from the movable sliding rails, of the telescopic rods are fixedly connected with mounting frames, and the functions of rapidly adjusting the distance between the steel pipes and improving the equipment inserting effect can be achieved.

The invention provides a virtual synchronization micro-grid adaptive secondary frequency modulation control method matched with load fluctuation, and the method comprises the steps: building an inverter island operation model based on VSG control, and generating a transfer function; determining stable operation conditions of the system according to the transfer function; and according to stable operation conditions of the system, optimizing values of a droop coefficient K [omega], a virtual inertia J, a virtual damping D, a proportionality coefficient Kp and an integral coefficient Ki according to change of a switching load by utilizing a discrete particle swarm algorithm, and controlling operation of the VSG. The droop coefficient K omega, the virtual damping D, the virtual inertia J, the proportionality coefficient Kp and the integral coefficient Ki in the secondary frequency modulation controller can be automatically adjusted according to the size of the switching load, and the problem that the system frequency exceeds the safe operation range in the adjusting process due to the fact that the switching load of the system is too large is solved.

The utility model provides a textile fabric cutting device, which relates to the textile fabric processing field and comprises a fixed frame, a processing platform and a movable frame, two groups of transmission rollers are arranged on two sides of the inner side of the fixed frame, a baffle is arranged on one side of the top of the inner side of the fixed frame, a cleaning roller is arranged at the bottom of the baffle, the processing platform is arranged on the inner side of the fixed frame, and the movable frame is arranged on the processing platform. Two sets of protective pads are arranged on the two sides of the top of the machining platform, a movable frame is arranged on the top of the fixed frame, an adjusting cutting head is arranged at the bottom of the movable frame, and two sets of electric telescopic rods are arranged on the top of the movable frame. According to the cloth cutting device, a worker can conveniently rotate the adjusting cutting head to adjust different cutting heads or cutting angles according to different cloth characteristics or processing requirements, it is guaranteed that displacement or dislocation cannot occur in the fabric cutting process, and meanwhile the device can adapt to the processing effect of different cloth; and secondly, the adjusting time of manually replacing the tool bit by workers can be shortened, and the machining efficiency of the device is improved.

The invention provides a self-adaptive valve driving device and a control method. The self-adaptive valve driving device is characterized in that an upper computer receives signals transmitted by a torque sensor and a photoelectric encoder through an RS485, and the upper computer analyzes the signals through an inner-ring controller and an outer-ring controller of an internal active-disturbance-rejection iterative learning algorithm, removes interference and then outputs control signals; the lower computer comprises a brushless direct current motor, a planetary reducer and a valve rod, signals output by the upper computer are transmitted to the brushless direct current motor, the brushless direct current motor transmits torque to the valve rod through the planetary reducer, and therefore opening and closing of the ball valve are controlled. The running state and the fault condition of the valve are judged according to the collected data, and the output of the brushless direct current motor is adaptively adjusted through the active-disturbance-rejection iterative control algorithm to act on opening and closing of the ball valve.

The invention discloses a numerical control horizontal boring and milling machine and a using method thereof, and relates to the technical field of boring and milling machines. Comprising a lathe bed, a pair of fixed transverse shafts are arranged on the lathe bed, hollow worms are arranged on the fixed transverse shafts in a sleeving mode, and first sliding rails are arranged above the hollow worms; a fixing block is arranged between the pair of first sliding rails, a pair of first sliding plates are fixedly arranged on the fixing block, a pair of second sliding rails are fixedly arranged on the two sides of the pair of first sliding plates, a rectangular sliding frame is clamped between the pair of second sliding rails, and a translation plate is arranged above the rectangular sliding frame; an annular clamping rail is fixedly arranged on the translation plate, a fixed rotating ring is clamped in the annular clamping rail, a fixed plate is fixedly arranged on the fixed rotating ring, and a machined part is placed on the fixed plate. The translation path of the machined part can be reasonably arranged according to the machining process requirements, so that the cutter can move in a more efficient path in the machining process, the stroke time of the cutter can be shortened, the proportion of the cutting time in the whole machining period is increased, and therefore the overall machining efficiency is improved.

The invention discloses an electric power fusion station virtual inertia fuzzy adaptive control method and system, and the method comprises the steps: carrying out the sampling of an AC frequency and a DC voltage, and carrying out the normalization processing, and obtaining a normalized AC frequency and a normalized DC voltage; obtaining a normalized alternating current frequency change rate and a normalized direct current voltage change rate according to the sampling values of the alternating current frequency and the direct current voltage; constructing an active power reference equation according to the actual output power, the normalized alternating current frequency, the normalized direct current voltage, the normalized alternating current frequency change rate and the normalized direct current voltage change rate of the interconnector; according to the active power reference equation, in combination with the power transmission limit constraint of the interconnected converter, designing the constraint of a normalized virtual inertia and a normalized virtual capacitance value; fuzzy control is utilized, and according to dynamic changes of input variables, real-time normalized virtual inertia and a normalized virtual capacitance value are obtained. According to the invention, the dynamic and steady-state performance of the power fusion station system can be improved.

The application provides an environment simulation air extraction device cooperative optimization control method and system based on cooperative differential game, comprising the following steps: step 1, a dynamic model of the air extraction device is established. Step 2, the air supplement valve and the plurality of inlet valves are regarded as game participants, and a pressure-pressure ratio multi-objective optimization model based on cooperative differential game is constructed. Step 3, an approximate dynamic programming algorithm-critical neural network is combined to obtain an approximate Pareto optimal solution of the established game optimization model. Step 4, a cooperative optimization controller is designed: the inlet valve adopts PI control combined with a filter and an optimization item to realize cooperative control of pressure and pressure ratio. Step 5, on a multi-compressor parallel simulation platform, various complex working conditions such as valve leakage and compressor failure are set to verify the robustness and superiority of the algorithm. After the application of the technical scheme, the speed, robustness and anti-interference ability of the system based on the cooperative differential game cooperative optimization control algorithm are significantly improved.

The invention discloses a line reference conversion device, relates to the technical field of machining, and is used for solving the technical problems of machining interruption, pause and large error caused by the fact that a machining machine cannot recognize a line reference in the prior art. The line reference conversion device comprises an alignment assembly, a fixing assembly, an adjusting assembly, a shell and a placing plate, the alignment assembly, the fixing assembly and the adjusting assembly are connected with the shell, the shell is connected with the placing plate, the adjusting assembly is used for adjusting the alignment assembly, and the placing plate is used for placing a workpiece. According to the alignment assembly, the plane where the line reference on the workpiece is located can be converted into the reference plane on the alignment assembly, so that collection, conversion and recognition of the line reference are achieved, errors are reduced, and automatic machining is facilitated.

The utility model discloses a hanging bracket for engineering construction, which comprises a support plate, the left side and the right side of the support plate are fixedly connected with support connecting columns, the tops of the support connecting columns are fixedly connected with a positioning plate, and a plurality of mounting holes are formed in the positioning plate. By arranging the adjusting unit, when the position of the adjusting plate needs to be adjusted, a limiting ring is screwed through a thread, the limiting ring is made to leave the surface of the supporting plate, limiting on the adjusting plate can be relieved, then a connecting rod is pulled, the connecting rod slides in a second sliding groove, meanwhile, the limiting ring is driven to move, and the position of the adjusting plate can be adjusted. And after the distance between the adjusting plates is adjusted, the limiting ring is reversely rotated to be attached to the surface of the supporting plate, adjustment of the adjusting plates can be completed, the adjusting plates can be adjusted without the help of tools, the adjusting time is shortened, and the adjusting efficiency of the adjusting plates is improved.

The utility model relates to the technical field of ground mat production, in particular to a ground mat cutting device facilitating continuous production. According to the technical scheme, the cutting device comprises cutting discs, a cutting frame and a cutting motor, a cutting shaft is rotatably installed in the cutting frame, the outer surface of the cutting shaft is slidably sleeved with a plurality of sliding sleeves, the outer surface of each sliding sleeve is fixedly sleeved with a cutting disc and a rotating bearing, and the outer surface of each rotating bearing is fixedly connected with a guide sliding block through a connecting rod; a guide sliding groove is formed in the top of the inner wall of the cutting frame, the guide sliding block is located in the guide sliding groove, an electric cylinder is fixedly installed on the rear surface of the cutting frame through a fixing frame, and the output end of the electric cylinder is fixedly connected with a moving plate. According to the utility model, the distance between the equally-divided cutting discs can be conveniently adjusted so as to adapt to different equally-divided cutting requirements of different ground mats, the adjusting time of the cutting discs is saved, and the influence on normal production of the ground mats is effectively reduced, so that the continuous production of the ground mats is facilitated.

The utility model relates to punch press base field discloses an adjustable punch press base, including support seat, the top of support seat is equipped with two adjusting seat of sliding, the top of adjusting seat is equipped with the seat of placing of sliding, and the top of support seat is equipped with the moving groove, the bottom of adjusting seat is fixedly installed with the moving seat, and the moving seat is slidably installed in the moving groove, the top of adjusting seat is equipped with two drive grooves, the bottom of seat of placing is fixedly installed with the drive seat, and the drive seat is slidably installed in the drive groove, and the inner wall of the side of corresponding two drive grooves is rotatably installed with same thread rod, and the drive seat is threadedly sleeved on the thread rod. The utility model has the advantages and effects that: through the adjustment structure of many directions, the flexible adjustment of seat position is realized, can adapt to different work piece processing demand, improved punch press base's applicability and production efficiency, and simple structure, convenient operation, cooperation stable and reliable.

This invention discloses a load adaptive torque control method for a permanent magnet brushless motor. The method acquires high-frequency electrical feedback and low-frequency mechanical angular velocity based on asynchronous timing updates. Asynchronous sampling lag is eliminated through time resolution matching. The active power gradient is reconstructed using discrete differential calculations, and a mechanical state observer is constructed to extract high-frequency synchronous angular acceleration. These two parameters are combined to calculate a virtual load mutation indicator factor. Based on this factor, the load condition is determined, and adaptive feedforward current generation and speed loop integral state preprocessing are triggered in parallel. Finally, the final q-axis command current is synthesized to complete closed-loop control. Furthermore, this invention utilizes a radial basis function neural network to identify the actual moment of inertia online and updates the equivalent parameters to the observer in real time. This invention solves the shortcomings of traditional control methods, such as response lag and model parameter mismatch in the early stages of load mutations, effectively suppressing transient speed drops in the motor and improving the system's anti-disturbance performance.

The utility model provides a train brake beam overhauling device relates to train brake beam overhauling technical field, including fixed frame, still include many range clamping subassembly, many range clamping subassembly include fixed frame of fixed connection in fixed frame, have piston on fixed frame and slide, have inner slide bar on piston and fixed connection through transmission link, have carousel on inner slide bar and slide, have bottom plate on carousel and slide, have inner slide bar on bottom plate and slide, have telescopic link on fixed frame and fixed communication, have vertical slide on telescopic link and fixed connection, have clamping link on vertical slide and fixed connection, the utility model discloses the adjustment effect of many directions, need not to disassemble component and can quick adaptation size difference of different vehicle model, different wear degree brake beam, compatible majority of active service vehicle model, the adjustment time is greatly shortened compared with traditional equipment, has solved the inconvenient problem of adjusting the range of holding of prior art in background art.

The cloth dragging wheel mechanism for the sewing machine comprises an installation plate, a cloth dragging wheel and a connecting rod mechanism, a driving shaft is arranged on the installation plate, the connecting rod mechanism comprises an output rod, a connecting rod and an executing rod which are sequentially connected, a transmission cam is fixedly arranged on the driving shaft, the output rod is rotationally connected with the transmission cam, and the executing rod is connected with the output rod. The mop device is characterized in that the connecting rod mechanism comprises a connecting node located between the output rod and the connecting rod, a control mechanism eccentrically arranged with the connecting node is arranged on the mounting plate, a driving rod rotationally connected with the connecting node is arranged on the control mechanism, and the driving rod is connected with the connecting node through a one-way bearing. The control mechanism can control the driving rod to rotate so as to change the position of the connecting node; and the control mechanism has a locking function. The problem that the length of a connecting rod of an existing cloth dragging wheel needs to be manually adjusted to meet the production requirement, and consequently the production efficiency is affected is solved.

This utility model relates to the technical field of tension adjustment devices, specifically a tension adjustment device for the production of flame-retardant needle-punched fabric. Its purpose is to solve the problem that existing tension rollers require height adjustment when guiding needle-punched fabrics of different specifications. However, the adjustment of the tension roller is cumbersome and time-consuming, achieved by raising and lowering screws on a bracket. Therefore, this new device improves the efficiency and effectiveness of the tension adjustment, thus enhancing its practicality. The device includes a tension roller, a rotating shaft, and fixed plates. The rotating shaft is fixedly mounted to the tension roller, and both sides of the rotating shaft are rotatably connected to corresponding fixed plates. The tension roller is guided and pressed by the flame-retardant needle-punched fabric. A pre-tightening mechanism is provided at the bottom of the two sets of fixed plates. The pre-tightening mechanism also includes a sliding block, a lifting plate, a limiting plate, and a spring. A groove is provided at the top of the lifting plate, and a working cavity is provided at the bottom of the groove.

The invention provides a prediction control method based on improved locust optimization, and relates to the technical field of data processing and control engineering, and the method comprises the steps: carrying out the parameter identification of a mass regulation channel of a heat exchange station system through employing a recursive least square method with a forgetting factor, and building a controlled autoregressive moving average integral model; based on the controlled autoregressive moving average integral model, generating a prediction output through implicit generalized prediction control and constructing a target function, the implicit generalized prediction control directly identifying a prediction matrix and a prediction vector; when the control quantity increment exceeds a preset constraint range, an improved locust optimization algorithm is adopted to optimize the target function, the improved locust optimization algorithm is combined with a double-differential evolution strategy and a reverse learning mechanism, the double-differential evolution strategy updates the locust position through differential variation, and the locust position is updated through differential variation; the variant basis vector is based on the current optimal location and the random individual location.

The utility model discloses a welding current prefabrication adjustment and display system which comprises a first signal input circuit, a second signal input circuit, a first switching circuit, a second switching circuit, an inverse proportion operational amplifier circuit and a display circuit. The output end of the first signal input circuit is respectively connected with the input end of the first switch circuit and the input end of the inverse proportion operational amplifier circuit, the output end of the first switch circuit is grounded, and the output end of the inverse proportion operational amplifier circuit is connected with the first input end of the display circuit; the output end of the second signal input circuit is connected with the input end of the second switching circuit and the second input end of the display circuit. The output end of the second switching circuit is connected with the control end of the first switching circuit. According to the utility model, current prefabricated adjusting parameters are set as negative display, and are converted into positive parameter indication during actual welding, so that a user is clear at a glance; and meanwhile, the adjustment time of a user is greatly shortened, and more accurate current control is realized.

The present invention relates to the technical field of shock absorbers, and in particular to a large-stroke pneumatically controlled adjustable air spring. The stroke of the shock absorber used in the existing vehicle suspension system cannot meet the performance requirements of special vehicles. A large-stroke pneumatically controlled adjustable air spring comprises an air spring body, wherein the air spring body comprises a connecting seat, an upper ball bowl, a lower ball bowl, a lower ball bowl seat, a ball stud, a secondary cylinder assembly, a floating piston assembly, a primary cylinder assembly, a piston rod assembly, a first air chamber and a second air chamber. The secondary cylinder assembly is connected to a dustproof sleeve and an upper end cover is provided with an inflation valve connected to the first air chamber. An exhaust hole is processed at the end of the dustproof sleeve, and a balancing hole is provided at the end of the piston rod assembly. Compressed air is used as an elastic medium to realize energy conversion. The double air chamber structure design not only increases the stroke and stiffness of the air spring, but also can realize stepped vibration reduction and has stepped load-bearing capacity. The present invention has good development prospects in the technical field of shock absorbers.

The invention relates to an intelligent temperature control system and control method for a reaction disc of a biochemical analyzer, and the system comprises a temperature sensing unit which collects the real-time temperature distribution data of multiple regions of the reaction disc, and provides a precise data source for temperature control; the environment temperature sensor is used for monitoring the change of the environment temperature in the instrument, monitoring the change of the environment temperature in real time and providing environment parameters for anti-interference compensation; the thermal disturbance detection module is used for establishing a temperature disturbance model for reagent addition, providing a disturbance predicted value and improving the anti-interference capability; the adjusting control module is used for realizing double-closed-loop control logic, calculating a basic control quantity and a compensation control quantity and generating a total control instruction; the refrigerating and heating module responds to the control instruction and adjusts the temperature of the reaction disc through refrigerating / heating action; and the main control module is responsible for data overall planning, parameter management and control instruction issuing. The device has the beneficial effects that the temperature precision of the reaction disc is improved; the response speed is greatly improved; the anti-interference capability is obviously enhanced; and the temperature uniformity is obviously improved.

The utility model relates to the technical field of elevator, especially transmission belt subassembly and elevator of a kind of. Transmission belt subassembly includes conveying frame, driving roller, driven roller, driving part, conveying belt, driving roller and driven roller are spaced apart in conveying frame along length direction, conveying belt is sleeved in driving roller and driven roller, driving part is drivingly connected with driving roller. Transmission belt subassembly further includes two adjusting assemblies, adjusting assembly includes skid platform and locking part, the skid platform of two adjusting assemblies is spaced apart in conveying frame along width direction, the both ends of driven roller shaft direction are rotatably arranged in corresponding skid platform, the position of skid platform is adjustable along length direction, locking part is configured to lock or unlock the relative position of skid platform and conveying frame. The elevator includes the above-mentioned transmission belt subassembly, the position of adjusting skid platform is along length direction, so that conveying belt keeps tension, locking part locks the relative position of skid platform in conveying frame, the quick adjustment of the tension state of conveying belt is realized, and the tension adjustment efficiency of conveying belt is improved.