1934results about "Flow control using electric means" patented technology

A flow control device, having: a flow tube extending between upstream and downstream, and a neck region between the first and second ends, wherein the flow tube includes: a wall defining an outer boundary and extending longitudinally from a first end to a second end and transversely from a first side to a second side, wherein: the wall is nonmetal; the wall defines: a first segment extending longitudinally between the first and second ends and transversely from the first side to a segment junction; and a second segment extending longitudinally between the first and second ends and transversely from the second side to the segment junction; and the first segment has a first coefficient of thermal expansion (CTE) and the second segment has a second CTE that differs from the first CTE, to define a transverse CTE gradient.

The invention relates to the technical field of flow measurement and control, and particularly discloses a cheese filling flow real-time calibration control method and system.The cheese filling flow real-time calibration control method comprises the following steps that working condition information of cheese in a filling pipeline is collected in real time, and the working condition information comprises the temperature, the pressure, an original flow signal, the pump rotating speed and the proportional valve opening degree; dynamically selecting a filtering order according to the signal-to-noise ratio of the original flow signal, and outputting the filtered flow; and based on the acquired working condition information, predicting the dynamic viscosity of the cheese in real time through a neural network, fitting a flow-working condition relation function and calculating a target flow value. The signal-to-noise ratio of an original flow signal is dynamically adapted to optimize filtering processing, signal distortion caused by interference such as temperature drift and mechanical vibration is effectively eliminated, and the flow detection precision is improved; by means of the neural network, the dynamic viscosity of cheese is predicted in real time, the model is dynamically adjusted, the problems that traditional viscosity estimation lags behind, and the batch adaptability is poor are solved, and an accurate basis is provided for flow target value calculation.

The invention provides a verification method of a mass flow controller and a chemical vapor deposition machine. The method comprises the following steps: in a gap between two adjacent process treatments, setting a first mass flow controller to be a preset flow, introducing first gas into a vacuum reaction chamber through a first gas pipeline, and measuring the gas pressure change of the reaction chamber to obtain a first pressure change rate; setting a second mass flow controller as a preset flow, introducing a second gas into the vacuum reaction chamber through a second gas pipeline, and measuring the gas pressure change of the reaction chamber to obtain a second pressure change rate; obtaining a detection relation coefficient based on the first pressure change rate and the second pressure change rate; and when the deviation ratio between the detection relation coefficient and a pre-obtained reference relation coefficient is greater than a preset threshold value, determining that the at least one mass flow controller has abnormal deviation. Through the method, the gas flow deviation of the machine can be detected, and the flow control condition of the mass flow controller is fed back, so that the use efficiency of the machine is improved, and the detection cost is reduced.

An infusion pump system and method with common line auto flush, wherein the infusion pump system has a first reservoir, a second reservoir, a junction, a common line having one end in fluid connection with the junction and having a terminal fluid delivery end, and an infusion pump. The method includes infusing the first fluid at a first rate along a first flow path; entering a common line flush volume value for the common line; switching from the first flow path to a second flow path; driving the second fluid at the first rate along the second flow path; monitoring volume of the second fluid driven at the first rate; and driving the second fluid at a second rate along the second flow path when the monitored volume is equal to or greater than the common line flush volume value.

The invention provides a flow control method and device based on a PTC heater, the method is applied to a controller of a vehicle-mounted heating device, the vehicle-mounted heating device comprises the PTC heater, the controller is in communication connection with the PTC heater, and the method comprises the steps that the inlet and outlet temperature difference and the heating power of the PTC heater are obtained regularly; the performance parameters, the heating power and the inlet and outlet temperature difference of the cooling liquid are input into a preset flow calculation formula, and the corresponding cooling liquid flow is obtained through calculation; and obtaining an output value of the working parameter according to a pre-stored corresponding relationship between the cooling liquid flow and the working parameter under different output temperature differences so as to control the output temperature of the PTC heater according to the output value. According to the embodiment of the invention, the cooling liquid flow can be obtained through low-cost calculation, and a cooling liquid flow meter assembly is reduced; in addition, the output temperature of the PTC heater can be controlled according to the output value, and the heating efficiency of the PTC heater is improved.

A fluid control device includes a fluid pipe section including a fluid inlet and outlet connectable in series to a fluid pipe. A fluid valve is coupled in series within the fluid pipe section separating a fluid inlet and outlet side and controlling a fluid flow. An electric motor is mechanically connected to the fluid valve. A temperature sensor is connected to the fluid pipe section monitoring a temperature of the fluid flow. A pressure sensor is connected to the fluid pipe section monitoring a pressure of the fluid flow. A flow rate sensor is connected to the fluid pipe section monitoring a flow rate of the fluid flow. A control device processor is electrically connected to the electric motor and electrically connected to the sensors. A communication device coupled to the control device processor is for wirelessly connecting to a remotely disposed fluid monitoring and control system.

The invention discloses an equipment and facility operation and maintenance management system and method based on the Internet of Things, and relates to the technical field of equipment management. A control end classifies all valves according to health states, performs full-open adjustment on the valves which do not support operation, and then performs primary adjustment on the opening degree of each valve which supports operation according to the health states; the method comprises the following steps: acquiring a hydraulic value which needs to be output by hydraulic equipment, performing secondary adjustment on the opening degrees of all valves supporting operation by combining a valve classification result, performing weighted calculation on the health state data of all the valves by combining the relative importance of the valves in the hydraulic equipment after regularly acquiring the health state data of all the valves, and acquiring a management value of the hydraulic equipment. And judging whether the hydraulic equipment needs to be managed based on the management value. The management system adjusts the opening degree of the valve supporting operation twice, the hydraulic flow can be controlled more accurately, and the operation efficiency and stability of the hydraulic equipment are improved.

A method of calibrating a pump system can include providing a pump, calibrating a pump input with an input device connected to the pump, and calibrating a pump output with an output device connected to the pump. Calibrating the pump input can include selecting a first input signal value, generating a transmitted input signal corresponding to the first input signal value, and setting a nominative pump input value to the first input signal value. Calibrating the pump output can include receiving a received output signal outputted from the pump, and setting a nominative pump output value to the first input signal value.

The invention provides a seawater cooling control system and method which are applied to the technical field of ocean engineering, and the seawater cooling control system comprises a cooling water well, a first temperature sensor, a water level gauge, a water suction pump, a water delivery pump, a monitoring buoy, a second temperature sensor, a flow meter and a controller. The first temperature sensor and the second temperature sensor monitor the temperature in the well and the coral reef area and the water flow speed of the flow velocity metering area respectively, the water level gauge ensures that the water volume in the well is stable, and data are analyzed in real time through the controller to generate a control instruction. The difference value between the environment temperature and the whitening threshold value, the cooling water temperature in the well and the coral reef flow speed serve as input variables, the flow requirement of the water delivery pump is dynamically calculated through a preset rule base, and self-adaptive adjustment is achieved. Through cooperative feedback of the double temperature sensors, it is ensured that the water delivery temperature is strictly controlled within a coral tolerance threshold value, and heat stress whitening is avoided. Layered water taking is combined with a fuzzy control algorithm, energy consumption is reduced compared with a traditional deepwater extraction scheme, and negative effects of shading measures on zooxanthellae are avoided.

A fluid control device includes a fluid pipe section, a fluid valve assembled with the fluid pipe section, a flow rate sensor connected to the fluid pipe section monitoring a flow rate of the liquid fluid flow within the fluid pipe section, a control device processor electrically connected to the flow rate sensor to receive flow measurement signals from the flow rate sensor and operable to control movement of the fluid valve to a shutoff condition, and a wireless communication transmitter electrically connected to the control device processor. In response to the control device processor identifying from the flow measurement signals a flow condition exceeding a predetermined flow threshold, the control device processor performs at least one of controlling movement of the fluid valve to the shutoff condition and controlling wireless transmission of a user alert from the wireless communication transmitter.

The invention relates to valve electric control, in particular to a high-frequency-response wide-range dynamic flow generation device control method, which comprises a stable flow setting step, a parameter acquisition step, a dynamic flow constant flow scheme determination step, a stability calculation step and a valve adjustment step. According to the dynamic flow generation device composed of the multiple branch sonic nozzles with different throat diameters, the dynamic flow generation device can select different sonic nozzles according to the required flow value to be detected to achieve the flow value to be detected, and the flow precision of the dynamic flow generation device is improved. Asynchronous switching is carried out on the high-speed switching valves, the starting sequence and the interval time of the high-speed switching valves are set according to the time that the high-speed switching valves can achieve stable output flow, and therefore flow fluctuation generated when the valve state of the high-speed switching valves changes is eliminated, and the stability of the high-speed switching valves is improved. And the response speed and the flow generation precision of the dynamic flow generation device are improved.

The invention discloses a flow control method and device, a storage medium and semiconductor processing equipment. The flow control method comprises the steps that a second switch valve is switched on, a first switch valve is switched off, and the first actual flow of preset gas in a gas pipeline is detected when a flow controller is set to be the first current preset target flow; the second switch valve is switched off, the first switch valve is switched on, and the current equivalent flow of the preset gas in the gas pipeline is detected when the flow controller is set to be the first current preset target flow; calculating current temperature change values of the reaction chamber and the virtual chamber; calculating a first flow correction coefficient of a flow controller according to the first current preset target flow and the first actual flow; calculating a second flow correction coefficient of the flow controller according to the current temperature change value; and correcting the first current preset target flow of the flow controller by adopting the first flow correction coefficient and the second flow correction coefficient. The problem that the thickness of the etched film changes can be solved, and the first sheet effect is restrained.

The invention discloses a method and system for controlling the opening degree of a pipeline flow automatic adjusting valve, and relates to the technical field of automatic control. The method comprises the steps that real-time flow data in a pipeline and real-time pressure difference data of upstream and downstream of a valve are obtained; comparing the real-time flow data with a preset target flow to obtain a flow deviation, and generating a feedforward compensation signal by a proportional-integral-differential controller according to the flow deviation and the real-time pressure difference data; the flow deviation is input into a PID controller, and a proportional-integral-differential controller generates a feedback control signal; generating a composite control signal according to a superposition result of the feed-forward compensation signal and the feedback control signal; and the electric actuating mechanism is driven to adjust the opening degree of the valve according to the compound control signal, the actual opening degree of the valve is obtained through the position sensor, and the actual opening degree is fed back to the proportional-integral-differential controller. The invention provides a brand new solution with high robustness, high precision and low maintenance cost for industrial fluid control.

The invention provides a flow control method and device of a mass flowmeter, electronic equipment and a storage medium, and relates to the technical field of flow control, the method comprises the steps of monitoring a first mass flow of a target fluid at a first moment, and judging whether the first mass flow is smaller than a preset flow threshold or not; under the condition that the first mass flow is smaller than a preset flow threshold value, switching to a small flow control mode; under the small-flow control mode, PID parameters are dynamically optimized based on a set of characteristic data of the target fluid, a set of PID control parameters are obtained, and the set of characteristic data at least comprises viscosity data of the target fluid, temperature data of the target fluid and pressure data of the target fluid; and performing closed-loop control on the flow of the target fluid based on the group of PID control parameters. By implementing the technical scheme provided by the invention, the effect of improving the stability of flow control is achieved.

A mass flow controller and methods of providing for mass flow control are provided. A mass flow controller includes a control valve configured to control flow of a fluid in a flow path. A first flow sensor detects a first set of fluid flow parameters, and a second flow sensor detects a second set of fluid flow parameters. The first and second flow sensors are of distinct flow measurement types. The mass flow controller further includes a controller configured to determine a set of first mass flow rates based on the first set of fluid flow parameters detected by the first flow sensor and calibrate the second flow sensor based on the determined set of mass flow rates of the first mass flow sensor and the second set of fluid flow parameters.

The invention relates to the technical field of industrial process automatic control, in particular to an industrial steam flow intelligent adjusting system. According to the method, the continuous change trend of the steam state is subjected to time sequence identification, dynamic classification of the steam state can be realized under multivariate combination, so that a steam state switching path is insighted in advance, an information coupling measurement mechanism between enthalpy change and flow is introduced on the basis, and calculation of mutual information between enthalpy and flow is combined, so that the dynamic classification of the steam state is realized. Abnormal sections with adjustment deviation in actual operation are accurately recognized, the adjustment possibility is further judged according to the deviation quantification result of the target flow and the actual output flow, controllable and uncontrollable sections are effectively divided, and the rollback value domain limitation of the uncontrollable sections is set. Therefore, in the subsequent target value adjusting process, target setting of the remaining sections can be reset in a targeted mode, the priority sequence is constructed according to the adjusting time sequence and the adjusting amplitude, and dynamic sorting output of the adjusting strategy is achieved.

A gate linkage control method and device and a parallel water supply and power generation system are provided. The method comprises the following steps of: acquiring current gate opening degree information of the parallel water supply and power generation system and a current water level of a third trunk canal, the current gate opening degree information comprising current first gate opening degree information and current second gate opening degree information; determining a target gate linkage control strategy of the parallel water supply and power generation system according to the current gate opening degree information of the parallel water supply and power generation system and the current water level of the third trunk canal; and controlling a gate opening degree of a target gate according to the target gate linkage control strategy of the parallel water supply and power generation system.

The invention discloses a liquid cooling test system, a liquid cooling server and a liquid cooling server test method, and relates to the technical field of server cooling, a first sensing assembly and a second sensing assembly are arranged at the liquid inlet end and the liquid outlet end of to-be-tested electronic equipment respectively, and according to data collected by the first sensing assembly and the second sensing assembly, the liquid cooling server is tested according to the data collected by the first sensing assembly and the second sensing assembly. The cooling liquid distribution unit adjusts the internal working state of the cooling liquid distribution unit to adapt to the flow and flow resistance characteristics of different electronic nodes in the to-be-tested electronic equipment, and compared with the related technology, the cooling liquid distribution unit does not need to be redesigned, so that the technical problem that the use efficiency of a model machine immersion cooling system in the related technology is reduced can be solved, and the test efficiency is improved. And the use efficiency of the immersion cooling system of the prototype is improved.

The invention discloses an electric propulsion high-pressure fluid micro-flow control system and belongs to the technical field of electric propulsion flow control. The problems that an existing pressure reduction system is poor in control precision and low in reliability when working frequently are solved. An outlet of a gas cylinder is connected with a gas inlet of a proportional valve through a gas transmission channel, and a self-locking valve and a pressure adjusting system are sequentially arranged on the gas transmission channel; the proportional valve is connected with three third electromagnetic valves at the same time and is respectively used for controlling the on-off of the anode branch, the cathode branch A and the cathode branch B; the pressure sensor PIII is arranged at an air outlet of the proportional valve and used for collecting the pressure of the air outlet of the proportional valve; the pressure adjusting system collects the pressure of the gas transmission channel and sends the pressure to the controller, and the controller controls the pressure adjusting system, the proportional valve and the three third electromagnetic valves according to the pressure of the gas transmission channel, the pressure of the pressure sensor PIII and the working mode of the system. The method is suitable for electric propulsion system control.

The invention relates to the technical field of river flow regulation and control, and discloses a river flow self-adaptive regulation and control system which comprises a hydrological parameter acquisition module, a water flow characteristic analysis module, a section stability analysis module, a multi-source fusion judgment module, a regulation and control parameter generation module and an additional riverbed coupling analysis and dynamic feedback execution module. The hydrological parameter acquisition module acquires parameters to judge a flow unbalance risk and triggers subsequent analysis; the water flow characteristic analysis module extracts turbulence parameters to evaluate water flow uniformity; the section stability analysis module extracts morphological parameters to predict the erosion and deposition trend; the multi-source fusion judgment module fuses the data to generate a regulation and control signal; the regulation and control parameter generation module generates regulation and control parameters according to the matching strategy; a riverbed coupling analysis module monitors a main stream and riverbed coordination correction fusion index; and the dynamic feedback execution module adjusts the acquisition period and feeds back to form a closed loop. The system realizes the real-time monitoring, risk assessment and self-adaptive regulation and control of the river flow, and improves the scientificity and accuracy of regulation and control.

The invention relates to the technical field of concrete pouring, and discloses a concrete cooling water flow regulation monitoring system and method based on an image technology, and the method comprises the steps: embedding cooling water flow state factors into a concrete temperature field calculation process, and analyzing concrete state parameters and image data of the cooling water flow state. The temperature field of the concrete is calculated, and the corresponding cooling water flow regulation control instruction is generated based on the temperature change trend, so that the intelligent level of the concrete cooling process is improved, uniform cooling is ensured, local optimized cooling is realized, it is ensured that the concrete is kept in a safe temperature range in the construction period, the cracking risk is reduced, and the construction quality is improved. The strength and durability of the concrete are improved, and the construction quality and efficiency are also improved.

A liquid cooling method and system for estimating power consumption of cooling rack-mounted processing assemblies and controlling corresponding fan and pump speeds, is presented. The presented method and system provide for the estimation of the power consumption of the rack-mounted data processing assemblies by calculating a thermal load based on measured cooling liquid temperatures, heated liquid temperatures, ambient dry cooler temperatures, and cooling liquid volume and controlling the fan speed based on the estimated power consumption. The presented method and system also provide for controlling the pump speed based on measured flow rates and corresponding empirically derived pump head pressure values H.

A gas supply control device that supplies a gas to a processing chamber in which a workpiece is processed, includes: a first port connected to a gas source of a purge gas; a second port to which a gas source of a processing gas is connected; a collective pipe in which each of the purge gas and the processing gas supplied from the first port and the second port merges, respectively, and flow; a first flow rate controller provided between the first port and the collective pipe; and a second flow rate controller provided between the second port and the collective pipe. A gas flow path through which the purge gas flows is provided from an output side of the first flow rate controller to an input side of the second flow rate controller.

The invention relates to the field of river ecological water flow regulation and control, in particular to an intelligent water flow regulation and control system based on a river ecological environment, and the system comprises a data processing module which comprises a data collection unit for collecting sensor data at a river downstream gate; the decision-making module is connected with the data processing module and comprises a data analysis unit which is used for analyzing the standardized data by utilizing a machine learning model so as to output an analysis result; the storage module is respectively connected with the data processing module and the decision making module and is used for respectively storing the sensor data, the standardized data and the analysis result; and the control module is respectively connected with the data processing module, the decision module and the storage module and is used for determining the refresh rate of the sensor data according to the fluctuation amplitude of the water flow at the downstream gate. According to the invention, the accuracy of intelligent regulation and control of the water flow is improved.

Disclosed are techniques to establish a modified pump rate that mitigates the effects of a pump occlusion and enables a recommended dosage of insulin to be output by a pump mechanism over the course of a control cycle. In an example, the pump rate may be reduced by adding a calculated time interval between application of actuation commands to extend the amount of time over which insulin may be output by the pump mechanism.

A granular material flow control system includes a granular material supply, a discharge head in fluid communication with the granular material supply, and a pan positioned beneath the discharge head to receive granular material discharged from the discharge head, the pan comprising a first end portion and a second end portion. A flow regulator conduit is coupled to a weight sensor, the flow regulator conduit having an inlet opening and an outlet opening, the second end portion of the pan being received in the inlet opening of the flow regulator conduit. A vibratory feeder is coupled to the pan and configured to vibrate the pan to induce granular material in the pan to flow off of an edge of the second end portion into the flow regulator conduit.

The invention discloses a sewage treatment aeration air volume control method, device and equipment and a storage medium, and relates to the technical field of sewage treatment.The sewage treatment aeration air volume control method comprises the steps that historical and latest real-time data are obtained and preprocessed to form historical effective sample data and latest real-time sample data, an LSTM network is used for encoding to form a feature encoding vector, and the feature encoding vector is used for encoding the historical effective sample data and the latest real-time sample data; and performing fusion with latest real-time sample data, generating and optimizing by utilizing an Actor-Critic model to form an optimized valve opening adjustment amount and an optimized adjustment dead zone threshold value of each branch, and further determining a valve adjustment action and executing the valve adjustment action through an actuator. The aeration air volume demand of the system is dynamically predicted through the LSTM network and the Actor-Critic model, a control strategy is generated and continuously optimized, meanwhile, a dead zone is determined and adjusted by optimizing an adjustment dead zone threshold value, the dead zone range is continuously and dynamically optimized, the action frequency and mechanical abrasion are reduced, and the operation and maintenance cost can be reduced under long-period use.

The invention discloses a mold cooling water supply, conveying and quantitative control method and system. The method comprises the following steps: acquiring an initial monitoring data set; according to the initial monitoring data set, if the partition temperature exceeds a preset threshold value, the flow of the corresponding cooling channel is increased, if the partition temperature is lower than the preset threshold value, the flow is reduced, and an optimized flow distribution scheme is generated; a dynamic adjusting module is adopted to conduct temperature parameter calibration on the optimized flow distribution scheme, if the regional temperature deviation is detected, the cooling medium supply amount is corrected, and a dynamic balance control instruction is generated; humidity and dew point temperature data are obtained from an environment monitoring system, if the difference value between the humidity and the dew point temperature is smaller than a safety threshold value, a condensation prevention mechanism is triggered, and a cooling medium temperature upper limit parameter is adjusted; and executing partition cooling control according to the final regulation and control parameters, and feeding back the operation data to a database for updating a preset threshold value and optimizing algorithm parameters. Intelligent and accurate control over the mold temperature is achieved, and the product quality and the production efficiency are improved.

A seat post assembly includes a seat post that is electrically adjustable in height. The adjustability may be based on one or more pressures sensed by one or more sensors within the seat post assembly, respectively. The disclosed seat post assembly includes an electronics module. The electronics module may be carried under the seat or saddle and may include a pressure sensor or pressure sensor circuitry.

The invention belongs to the technical field of intelligent control, and provides a double-fan parallel operation control system and method based on dynamic flow balance, and the system comprises a flow guide assembly, an electric control valve, a flow sensor and a control assembly; the flow sensors are used for collecting air flow data at the inlets and outlets of the corresponding fan branches and sending the air flow data to the control assembly; the control assembly is used for inputting the air flow data into the three-dimensional dynamic fluid mechanics model to obtain a flow deviation value between the current air flow and the target air flow, inputting the flow deviation value into the control decision model to obtain a control instruction, and issuing the control instruction to the flow guide assembly and / or the electric adjusting valve. And the flow guide direction of the flow guide assembly and / or the opening degree of the electric control valve are / is controlled. According to the scheme, the three-dimensional dynamic fluid mechanics model and the control decision model can be combined, the accurate control instruction is obtained, and the accuracy, reliability and convenience of the double-fan parallel operation control link are improved.