523 results about "Proportional control" patented technology

The invention discloses an ablation impedance dynamic prediction method based on multi-modal time sequence fusion and a related device. The method comprises the following steps: acquiring multi-modal time sequence data of an ablation electrode in real time, and constructing a multi-dimensional input vector containing a temperature change rate, an ultrasonic echo gradient and a standardized timestamp; performing parameter fine tuning by using a pre-trained two-channel long-short-term memory neural network, respectively extracting feature vectors of the physical parameters and the image parameters, fusing the feature vectors, and outputting an impedance predicted value in a future preset time window; and dynamically adjusting the ablation output power by adopting a proportional control strategy based on the deviation between the predicted impedance and the target impedance. Through time sequence fusion of the multi-modal data and the prediction capability of the deep learning model, the real-time monitoring and power adjustment precision of the ablation process is improved, and the safety and effect stability of ablation treatment are effectively improved.

The invention provides a stable operation control method and system for a self-synchronizing voltage source centralized photovoltaic inverter, and the method comprises the steps: detecting the change rate of the DC voltage of the centralized photovoltaic inverter and the output active power of a photovoltaic panel in real time, and when the ratio of the change rate of the DC voltage to the change rate of the output active power of the photovoltaic panel exceeds a threshold value, starting the control of the stable operation of the photovoltaic inverter. A system working mode is converted from a power control mode to a voltage control mode, and a power given value and a direct-current voltage given value of a control system are adjusted in real time. A synchronous angular frequency is obtained by adding an output value of the deviation of the active power through a proportional controller and a power grid frequency value, and the phase of an output modulation voltage of a grid-connected converter is obtained after integration, so that the grid-connected power of the photovoltaic inverter is adjusted. The working points of the photovoltaic inverter can stably operate on all the working points of the photovoltaic power-voltage characteristic curve, it is ensured that the photovoltaic inverter is located at the maximum power point all the time, and then stable operation control over the self-synchronizing voltage source centralized photovoltaic inverter is achieved.

The invention discloses a digital hydraulic system and a control method. The system comprises a digital hydraulic valve, at least one hydraulic pump assembly and a controller. The digital hydraulic valve comprises at least one working unit, and each working unit comprises a main valve, a front differential pressure compensator and a pilot driving module used for driving and controlling the position of a valve element of the main valve. The differential pressure compensator adopts electric proportional control; the pilot driving module comprises a valve element displacement sensor used for detecting the actual displacement of a valve element of the main valve. The hydraulic pump assembly comprises a hydraulic pump, a variable displacement mechanism, a lead screw and a servo motor, the servo motor converts rotary motion into linear motion through the lead screw to directly control the variable displacement mechanism, and displacement control over the hydraulic pump assembly is achieved. An outlet of the hydraulic pump is connected to an inlet of the differential pressure compensator, an outlet of the differential pressure compensator is connected to an inlet of the working linkage main valve, and a working opening of the working linkage main valve is connected with the oil cylinder or the motor. And the servo motor, the differential pressure compensator and the pilot driving module are respectively in signal connection with the controller.

The present invention relates to the field of electric vehicles and to a highly adaptable creep control method for pure electric heavy-duty trucks. After the pure electric heavy-duty truck enters creep mode, the method performs P-term dynamic proportional control to obtain P-term dynamic proportional control torque; performs I-term dynamic integral proportional closed-loop control to obtain I-term dynamic proportional integral closed-loop regulation control torque; performs slope feedforward torque compensation control to obtain slope compensation torque; and performs vehicle weight feedforward torque compensation control to obtain vehicle weight compensation torque. The P-term dynamic proportional control torque, I-term dynamic proportional integral closed-loop regulation control torque, slope compensation torque, and vehicle weight compensation torque are added together to obtain creep closed-loop regulation control torque. The creep closed-loop regulation control torque is then subjected to a fixed limit to prevent abnormal torque output caused by closed-loop regulation. Through the method of the present invention, stable creep speed control can be achieved for pure electric heavy-duty trucks operating with or without a trailer, unloaded, fully loaded, and under various slope conditions.

The invention discloses a multi-mode positioning intelligent corn harvester operation auxiliary system, and relates to the technical field of agricultural machinery. The corn harvester operation auxiliary system comprises a multi-mode positioning fusion module, a multi-source data sensing and preprocessing module, an intelligent decision and control center module, a dynamic operation execution module, an edge calculation and data interaction module and an intelligent remote monitoring and fault diagnosis module. The dynamic operation execution module comprises an operation parameter adjusting unit and a driving control unit, the operation parameter adjusting unit adopts an electro-hydraulic proportional control technology, and the driving control unit is combined with a steer-by-wire and driving technology to form closed-loop control; the system and the method have the advantages that the limitation of traditional single satellite positioning is solved by using a four-mode fusion framework of satellite positioning, inertial navigation, visual positioning and UWB positioning, and inertial navigation, visual positioning and UWB positioning work cooperatively in mountainous areas and other environments in which satellite signals are easy to block.

The invention discloses a paver starting vibration system and a control method, and relates to the technical field of road construction machinery, the control method comprises the following steps: starting a starting stage automatic adjustment mode, setting initial operation parameters, and collecting an actual rotation speed in real time; based on the actual rotating speed, establishing a linear proportional control relation for the running speed, and dynamically adjusting the running speed; and the dynamic adjustment process is continuously carried out, and when specific conditions are met, the mode is automatically switched to the normal mode. The intelligent control that the paving speed is restrained by the vibrating rotating speed is achieved, and the technical problems that in the asphalt paving starting stage, due to the fact that the resistance of the vibrating beam is increased, the actual rotating speed is insufficient, and due to the fact that the vibrating rotating speed is not matched with the paving speed, the pavement compactness is poor, and the flatness is low are solved.

The invention discloses efficient heat dissipation cooling equipment adaptive to a new energy automobile power battery. The efficient heat dissipation cooling equipment comprises a battery frame; the liquid cooling plate is fixedly mounted at the bottom of the battery frame; the second cooling system comprises a refrigerant supply pipe, a refrigerant recovery pipe and a side cooling plate, and the refrigerant supply pipe is fixedly mounted on the side wall of the battery frame; a main pipe inlet of the three-way proportional regulating valve A is connected with the cooling liquid supply main pipe, a branch pipe outlet of the three-way proportional regulating valve A is connected with the first connector pipe, and another branch pipe outlet of the three-way proportional regulating valve A is connected with the second refrigerant inlet; a main pipe inlet of the three-way proportional regulating valve B is connected with the cooling liquid return main pipe, a branch pipe outlet of the three-way proportional regulating valve A is connected with the second connector pipe, and another branch pipe outlet of the three-way proportional regulating valve A is connected with the second refrigerant outlet. Compared with the prior art, the invention solves the problem of low heat dissipation and cooling efficiency of the existing new energy automobile power battery which only controls the temperature through the lower side liquid cooling plate.

The invention discloses an annular permanent magnet linear synchronous motor speed feedforward compound control method considering disturbance compensation, and the method comprises the steps: taking an annular permanent magnet linear synchronous motor TPMLSM as a control object, and building a voltage model of the TPMLSM under a three-phase static coordinate system; based on this, establishing a control model under a d-q rotating coordinate system; determining a speed loop transfer function of the TPMLSM based on conventional integral proportion (PI) control, introducing a feed-forward controller on the basis, and designing a TPMLSM speed feed-forward composite controller through the transfer function of the feed-forward controller; a quasi-resonance extended state observer (ESO) is used for observing external disturbance, a disturbance observation value is equivalent to a q-axis current disturbance quantity, and feedforward compensation is carried out on the q-axis current disturbance quantity to a speed ring for output, so that the anti-disturbance capability of the speed ring is improved; proportional control is introduced into disturbance observation items of the ESO disturbance observer, dynamic response of the disturbance observer under low bandwidth is accelerated, the dynamic response of a motor control system is improved, and the anti-disturbance capability of the system is enhanced.

The invention relates to the technical field of proportional valves, and discloses a stepless speed regulation proportional valve with displacement detection, which comprises a valve body, a proportional controller is arranged at the bottom of one side of the valve body, a proportional cavity is arranged in the valve body, the size of the bottom of the proportional cavity is larger than that of the top, a conical surface is arranged at the joint, and an inlet cavity is arranged at the top of one side of the valve body. An outlet cavity is formed in the bottom end of the valve body, a valve rod is arranged in the valve body, a valve element is fixedly arranged at the bottom of the valve rod, a permanent magnet is arranged at the top of the valve rod, a shell is arranged at the top end of the valve body, and a displacement detector is arranged in the shell. When the valve rod drives the valve element to move, the displacement detector can move synchronously under the action of the supporting spring, the position, the movement speed and the movement direction of the valve element are detected, and the accuracy of the proportional valve is guaranteed; and the positions of the connecting pipe and the pipeline can be preliminarily positioned through the arranged positioning clamp.

The invention relates to the technical field of roll grinders, and discloses a grinding control method and system for a roll grinder, and the method comprises the steps: deploying a pressure sensor, collecting pressure data and position coordinates, and building an initial data set. Abnormal data are identified and removed by detecting a time-pressure curve, missing values are complemented by utilizing curve fitting, and a corrected data set is formed. Workpiece boundaries are recognized based on pressure distribution, and after effective data are screened, a weighted average pressure value is calculated in the vertical direction of the grinding wheel. And dynamically adjusting the normal force of the grinding wheel by adopting a proportional control algorithm to enable the pressure to approach a target value. Abnormal data can be monitored, equipment health state evaluation is supported, the workpiece surface burning risk is reduced through pressure feedback compensation, and the size precision is improved.

The invention relates to the technical field of agricultural machinery intelligent control, in particular to a combine harvester track trafficability control method based on visual inspection, which comprises the following steps: S1, predicting a motion track based on the real-time traveling speed and steering angle of a harvester; s2, extracting a real-time terrain slope angle of the trajectory region; s3, determining a target grounding pressure distribution mode required by the track in the predicted track area; s4, calculating a target hydraulic flow distribution proportion used for controlling a walking motor; and S5, the hydraulic valve group is controlled to adjust the oil supply amount according to the target flow distribution proportion. Through linkage of visual perception and hydraulic control, segmented self-adaptive adjustment of the track grounding pressure is achieved, and the trafficability and operation stability of the combine harvester under complex terrains are effectively improved.

The embodiment of the present application discloses a power supply system and its control method. The power supply system includes N distributed power sources and at least one detection control unit. The N distributed power sources are connected to the power grid in parallel or in series, and N is an integer greater than 1; the detection control unit is used to obtain the power compensation control ratio of each distributed power source based on the impedance of each distributed power source to the grid connection point of the power supply system when it detects that the oscillation of the power supply system exceeds a preset threshold range. The power compensation control ratio is the ratio of the power output of each distributed power source to the total power output of the power supply system; the detection control unit is also used to control the power output ratio of each distributed power source based on the power compensation control ratio. By adopting the embodiment of the present application, it is possible to suppress the oscillation of the power supply system and ensure the normal and stable operation of the power supply system without changing the original control circuit or adding additional equipment, so the implementation is low in complexity and low in cost.

The invention provides a neutral-point potential control method and system for a three-level converter, and relates to the technical field of intelligent control, positive bus voltage and negative bus voltage are sampled, a voltage deviation value is calculated, an additional control quantity is generated according to the voltage deviation value and a symbol of alternating current, and the additional control quantity is obtained through a symbol function and proportional control processing; performing amplitude limiting processing on the additional control quantity to obtain an amplitude-limited additional control quantity; superposing the amplitude-limited additional control quantity on the positive modulation wave, negating the amplitude-limited additional control quantity, and superposing the negated amplitude-limited additional control quantity on the negative modulation wave to obtain a final positive modulation wave and a final negative modulation wave; comparing the final positive modulation wave and the final negative modulation wave with a carrier wave, and generating a driving signal of the power device; and the on-off of the switching device is controlled according to the driving signal, so that a corresponding level is output to realize neutral-point potential balance. According to the invention, neutral-point voltage low-frequency fluctuation and direct-current offset suppression can be realized at the same time.

The invention discloses a vacuum induction melting furnace for alloy melting, and relates to the technical field of melting furnaces. The vacuum induction smelting furnace for alloy smelting comprises a smelting furnace body, a heating unit, a crucible, a bottom support, a mold base, a vacuum control unit, a feeding unit, a discharging control unit and a proportional control mechanism. According to the smelting furnace, the feeding unit is additionally arranged on the smelting furnace main body, the feeding unit is convenient for storing various raw materials and controlling discharging, the tedious operation of opening the furnace for adding the raw materials for many times is avoided, time and labor are saved, alloy smelting can be continuously and stably carried out, the discharging amount of the two raw materials is controlled through the design of the discharging control unit and the proportion control mechanism, and the smelting efficiency is improved. Quantitative supply is achieved, the discharging proportion of the two raw materials is accurately controlled through the proportion control mechanism, operation is easy and convenient, errors are not prone to occurring, the requirement for accurate proportion of different alloy components can be met, and stability and consistency of alloy quality are guaranteed.

The invention relates to the field of gas mixing systems, and discloses a gas mixing system based on high-pressure proportional valve control. The system comprises at least two gas branches, and each gas branch is provided with a high-pressure proportional valve communicated with a gas inlet and a one-way valve located at the downstream of the high-pressure proportional valve. The mixing unit is used for mixing the gas of each gas branch in a high-pressure state; the energy storage unit is communicated with the mixing unit and is used for temporarily storing the mixed high-pressure gas; the detection control unit comprises a gas analyzer communicated with the energy storage unit and a controller electrically connected with the gas analyzer, and the controller adjusts the opening degree of the high-pressure proportional valve in a closed-loop mode according to detection signals of the gas analyzer, so that the target component concentration of the mixed high-pressure gas is maintained within a preset range. The system can directly realize accurate proportioning and dynamic adjustment of multi-component gas on a high-pressure side, reduces lag and energy consumption of a low-pressure mixing scheme, and is suitable for high-pressure laser welding, material testing and other scenes needing quick response and high-precision proportion control.

The independent control hydraulic system of the ultra-large mining excavator comprises a plurality of pump sets, each pump set is connected with a main valve, a plurality of working units are arranged in each main valve, and each main valve is provided with a working unit connected with a movable arm oil cylinder, a bucket rod oil cylinder and a bucket oil cylinder. The working unit is connected with the left walking motor, the opening and closing bucket oil cylinder, the rotary motor and the right walking motor, and two control ends of the working unit are proportional control ends. According to the independent control hydraulic system of the ultra-large mining excavator and the using method, one pump set controls one set of main valves, independent control over a plurality of working sets of the same executing mechanism is achieved, the oil inlet and return through-flow area requirements can be met at the same time, the speed is guaranteed, meanwhile, back pressure is convenient to adjust, and action smoothness is improved; meanwhile, through independent control of different pump sets and different working sets of the same valve set, independent oil supply of an executing mechanism can be achieved, load difference losses between composite actions are reduced, energy consumption is reduced, and operation efficiency is improved.

The invention discloses a control method of a gas circuit device, a gas circuit control system and a computer readable storage medium, and relates to the field of gas circuit control. The method comprises the steps that the gas flow of the gas circuit device at the current moment is obtained; determining a gas flow difference value according to the gas flow at the current moment and a preset gas flow value; gas pump control parameters are determined according to the gas flow difference value and gain coefficients, the gain coefficients comprise a proportional gain coefficient, an integral gain coefficient and a differential gain coefficient, and the gas pump control parameters comprise a proportional control parameter, an integral control parameter and a differential control parameter; and the output power of the air pump is adjusted according to the air pump control parameters. The gas circuit device aims at solving the problem that an existing gas circuit device is prone to flow disturbance, and consequently the stability of the gas circuit device is poor.

The invention relates to the technical field of forklifts, and discloses a three-stage full-free gantry lifting hydraulic system for a forklift, which adopts a three-stage full-free gantry design, and realizes stable lifting of a pallet fork through cooperative work of a free cylinder and a side cylinder. The core of the system is a control valve set, the flow direction, flow and pressure of hydraulic oil can be accurately adjusted, and it is ensured that the gantry acts coordinately without impact. The forklift is mainly characterized in that a three-stage full-free portal frame design is adopted, the lifting flexibility of a pallet fork is improved, a free cylinder and a side cylinder are matched for use, synchronous lifting of the portal frame is achieved, a control valve set achieves stable lifting and descending through pressure compensation and proportional control, the emergency release function and stop valve protection are achieved, and operation safety is ensured; according to the invention, the impact and vibration in the lifting process of the pallet fork can be effectively reduced, the working efficiency of the forklift is improved, the service life of equipment is prolonged, and the operation safety is improved.

The invention provides a digital twinning virtual-real synchronization method based on time delay compensation and online correction. The method comprises the following steps: constructing a virtual twinning model and an initial LSTM prediction model; the data acquisition module acquires real-time operation data of a physical entity, processes the real-time operation data to obtain real data, and constructs a time sequence input tensor; inputting the time sequence input tensor into an LSTM prediction model to obtain a physical state prediction value; the physical state prediction value is sent to a virtual-real interaction module and an error correction module, and the virtual-real interaction module forcibly drives the virtual twin model to update to a future state and displays the future state on a Unity visual interface; an error correction module calculates a prediction error between real data and a physical state prediction value, and corrects the LSTM prediction model; and the adaptive synchronization control module dynamically updates the global synchronization period of the next round according to the prediction error by using a bounded proportional control algorithm. The method solves the problems that various delays exist in an industrial scene nowadays, and an existing synchronization method cannot give consideration to the real-time performance, the calculation load, the communication overhead and other aspects.

The invention discloses a multi-constraint nonlinear self-adaptive method and system for a control valve positioner, relates to the technical field of automatic control, and solves the problems that the existing PID algorithm depends on fixed parameters, so that the control precision of a complex nonlinear system is insufficient, the change rate of proportional parameters is too large during rapid adjustment, overshoot is easily caused, and the control precision is poor. And the system stability is influenced. A current signal of a signal generator is obtained; the microprocessor analyzes the current signal to obtain a target position value of the valve; the position of the valve is monitored in real time through a valve position sensor, and the opening degree deviation of the valve is obtained through analysis according to the target position value and the position signal of the valve; the control current of the magnet coil is calculated according to the opening degree deviation; the magnet controls the valve to move to a target position according to the control current; overlarge overshoot caused by too fast increase of a proportional link can be prevented; the system is more stable in a small deviation range; and the reasonability of proportional control parameters and the stability of the system are ensured.

The present application relates to the technical field of multi-axle vehicle chassis control, in particular to a kind of multi-axle distributed drive vehicle steering system fault tolerant control method: based on fault identification and proportional controller real-time calculation each axle angle proportion relationship, and through wheel angle sensor real-time acquisition wheel angle signal, and according to target angle, the active steering torque of steering motor is calculated by PID controller, so that the angle of each wheel reaches target value. Ensure that multi-axle distributed steering vehicle still has the ability of autonomous movement when steering failure occurs, using the technical solution can improve the mobility of multi-axle steering vehicle when several different wheel steering failures occur, and provide additional protection for the vehicle to still have autonomous movement to repair under the condition of no external rescue.

The invention provides a supercritical carbon dioxide pipeline and storage well linkage flow control method and device, and relates to the field of carbon dioxide geological storage, the method comprises the following steps: determining the pressure deviation between the reservoir pressure and the configured target pressure based on the obtained pipeline data, bottom hole pressure data and reservoir pressure data; based on the pressure deviation, the first opening degree of an injection control valve of supercritical carbon dioxide and the second opening degree of an injection control valve of a corresponding water injection opening in the water injection pipeline are determined. The pressure deviation can be accurately calculated by acquiring the pressure data of the pipeline, the well bottom and the reservoir and comprehensively considering the influence of the pipeline parameters on the pressure. Based on the deviation, the opening degrees of the carbon dioxide and water injection control valves are determined through scientific methods such as proportional control and flow and opening degree curves, and cooperative control over the carbon dioxide and the water injection control valves is achieved. According to the method, the problem that the reservoir pressure is too high or too low due to improper injection flow can be effectively avoided, the carbon dioxide leakage risk is reduced, and the sealing efficiency is improved.

The invention discloses an automatic charging control system for functional candies, which relates to the technical field of candy processing and comprises a stock bin module, a metering and conveying module, a mixing and caching module, a control execution module, a man-machine interaction control module and a safety protection module, the stock bin module is used for configuring an independent sealed stock bin for storing functional component raw materials in a classified manner, and the independent stock bin is provided with a material level sensor for monitoring the stock of materials in real time and triggering material supplementing early warning; and the metering and conveying module is used for performing high-precision metering on the materials in different physical states. Through a triple mechanism of synchronous conveying hardware, a dynamic coordination algorithm and real-time monitoring compensation, the system overcomes the defects of traditional sequential feeding from three dimensions of material conveying time sequence, proportional control precision and mixing process optimization, the feeding mode of simultaneous starting and stopping, accurate proportion and dynamic adaptation of multiple materials is achieved, and finally the component variation coefficient is reduced to be smaller than that of the conventional feeding mode. The distribution uniformity of functional components of candies is remarkably improved, and the quality stability of products is guaranteed.

The invention provides a hydraulic damping control anti-swing mechanism and a control method, belongs to the field of logistics sorting and automatic equipment, and constructs a closed-loop feedback control system to realize flexible braking of equipment. Active anti-swing and flexible brake control of the stacking machine are achieved by adjusting hydraulic damping force in real time, and therefore the purposes of reducing mechanical impact and improving positioning precision and operation safety are achieved. Comprising a hydraulic loop mounted at the top of the conveying equipment, a cooling assembly for cooling the hydraulic loop, a transmission assembly for transmitting hydraulic oil in the hydraulic loop to circularly flow during operation of the conveying equipment, and a guide wheel assembly, and the inertial measurement unit is used for monitoring the running state of the conveying equipment and sending signals for controlling and adjusting the flowing state of the hydraulic oil to the hydraulic loop.

The invention discloses a control method and device of a ground source heat pump system, the ground source heat pump system, a storage medium and a computer program product, the ground source heat pump system comprises a water tank, a floor heating device, an indoor heat exchanger and a ground source heat pump unit, and the method comprises the steps that the energy supply priority of the ground source heat pump unit is determined according to the outdoor environment temperature, the ground source heat pump unit is controlled to supply energy to the water tank, the indoor heat exchanger and the floor heating device according to the energy supply priority; in the process, the heat supply distribution proportion of the ground source heat pump unit is determined according to the temperature of the water tank, and the ground source heat pump unit is controlled to supply heat to the water tank and the floor heating device according to the heat supply distribution proportion. According to the scheme, by dynamically adjusting the energy supply priority and the heat supply distribution proportion of the ground source heat pump unit, the problems of fixed control priority and control lag are solved, and the system energy efficiency is improved.

The invention relates to a spaceflight electric propulsion integrated pressure closed-loop proportional storage and supply system and a control method thereof. The system comprises a flow channel integration body, wherein a fluid channel used for containing a propellant is formed in the flow channel integration body; the multiple functional components are detachably installed on the flow channel integration body and communicate with the fluid channel, and each functional component comprises a first pressure sensor configured to sense the pressure of the propellant, a second pressure sensor configured to sense the pressure of the propellant, and a third pressure sensor configured to sense the pressure of the propellant; and at least one proportional valve configured to adjust the pressure of the propellant; and the control circuit is configured to drive the proportional valve according to a signal of the first pressure sensor so as to carry out closed-loop proportional control on the pressure of the propellant. Control hardware and software are integrated in the storage and supply system, real plug and play is achieved, different electric propulsion system users do not need to redesign external control circuits and software for adapting to the system, and the universality, the response speed and the integration degree of the system are greatly improved.

The invention belongs to the technical field of hydraulic clamps, and particularly relates to a hydraulic clamp system based on electric proportional control, which comprises a hydraulic turntable, first hydraulic cylinders are symmetrically arranged at the upper end of the hydraulic turntable, the outer side surfaces of the two first hydraulic cylinders are sleeved with a support frame, and a first electric proportional overflow valve is arranged between the two first hydraulic cylinders; clamping jaws are symmetrically arranged at one end of the supporting frame. According to the clamp system, the influence of the oil temperature on the clamping force is corrected in real time through a temperature compensation algorithm built in the pressure feedback module, and the precision problem caused by temperature drift is solved in combination with closed-loop control of the pressure sensor array; the power distribution module adopts a load-sensitive control strategy, the output power of a hydraulic pump is dynamically optimized, energy consumption is automatically reduced in the pressure maintaining stage, and energy conservation is greatly improved compared with a traditional system; an energy recovery device is integrated, oil return pressure energy generated when the clamping jaws are loosened is converted into electric energy to be stored, system heating and energy waste are effectively reduced, the service life of hydraulic elements is prolonged, and the maintenance cost is reduced.

According to the temperature control and SPC statistical system for continuous cyclic cap making, temperature detection focuses on a threaded area on the side edge of a bottle cap, and a temperature data-bottle cap-mold cavity number association is established in combination with a groove of a forming device and double proximity switches; an upper die and lower die two-way independent cooling loop is adopted, the on-off proportion of an electromagnetic valve is controlled and adjusted according to the periodic circulation time proportion, and pressure balance is achieved in cooperation with a cold water bypass electromagnetic valve. An SPC statistical method is introduced, temperature fluctuation and mold cavity consistency are monitored through a control chart after data preprocessing, graded early warning is generated, and cooling parameters are dynamically optimized through a waterway optimization closed-loop unit. Accurate temperature control, abnormity traceability and mold cooling dynamic regulation and control of the key area of the bottle cap are achieved, the product percent of pass and production stability are improved, and energy consumption and maintenance cost are reduced.

The invention discloses a hydrostatic drive control system, a hydrostatic drive control method and a loader. The system comprises a walking system and a working system, the walking system comprises a whole vehicle controller, an engine controller, an engine, an electric control closed variable pump and an electric control variable motor. The working system comprises a quantitative hydraulic pump, a control valve, a working hydraulic cylinder and a hydraulic motor; the input end of the whole vehicle controller is connected with the output end of the engine controller and the signal output ends of an accelerator pedal, a hand accelerator knob, a speed governor knob and an FNR selection switch of the loader. Two different working modes are formed based on coupling and separation control of the engine rotating speed and the electric control closed variable pump displacement under different use working conditions, so that following control over the vehicle speed and the engine rotating speed can be achieved, and separation control over the vehicle speed and the engine rotating speed can also be achieved. The problems that under the working conditions of close-range loading of the loader and constant accessory flow, the vehicle speed and accessory operation action speed are poor in collaboration, and control is complex are solved. And the displacement of the electric control closed variable pump is subjected to multi-stage proportional control, so that any real-time vehicle speed is limited, and the vehicle speed requirements under different working conditions are conveniently controlled.

The invention discloses a defect detection robot and a water guide and drainage pipe visual and ultrasonic fusion defect detection method, and belongs to the technical field of multi-size hydropower station water guide and drainage pipe defect automatic detection / positioning. The defect detection robot comprises a robot chassis, and two pairs of servo driving wheels and a pair of supporting auxiliary wheels are arranged on the robot chassis and combined to form a six-point supporting structure; the two servo driving wheels on the same side are synchronously driven through a servo driving wheel controller so that differential turning of the robot can be achieved, and high-attraction magnetic attraction annular wheels are detachably arranged on the servo driving wheels. And the supporting auxiliary wheel performs motion control through an electric proportional control cylinder. According to the invention, the function of multi-attitude free crawling in a drain pipe with a smaller inner diameter or a larger inner diameter can be realized, the ultrasonic detection efficiency and the visual detection accuracy are improved, the performance information and the depth information of defects are respectively obtained through visual detection and ultrasonic detection, and the performance information and the depth information are fused to realize crack visualization, so that the visual detection accuracy is improved. And subsequent manual maintenance is facilitated.