126results about "Flow control using electric means" patented technology

According to an aspect, a flow rate control system includes: a gas pipe; a flow rate adjuster; a pressure sensor disposed on a primary side of the flow rate adjuster and configured to detect an actual static pressure of gas flowing through the gas pipe; a temperature sensor disposed on the primary side of the flow rate adjuster and configured to detect an actual temperature of gas flowing through the gas pipe; and a control device. The control device stores a reference density, a reference velocity, a reference static pressure, and a reference temperature, calculates an actual flow rate of the gas flowing through the gas pipe using the actual static pressure, the actual temperature, the reference density, the reference velocity, the reference static pressure, and the reference temperature, and determines a manipulated variable of the flow rate adjuster to make the actual flow rate equal to a target rate.

A flow control device configured to monitor energy usage. These configurations may include a controller that delivers a signal for pressurizing a pneumatic actuator. This controller can have software that can calculate energy usage based on the pressure of the signal and changes in, for example, the position of a valve. This feature can provide real-time data that an operator can use to identify potential problems on the operator's process line. In one embodiment, the operator can flag devices that exhibit energy usage trending away from a baseline level. These devices can have inherent problems that can develop into larger, more critical problems and cause problems with the quality of the final product or may require the operation to completely shut down the process line.

This invention relates to the field of bulk material loading weight control technology, specifically to a railway bulk material loading weight control method and system based on self-learning adjustment. The method includes: real-time acquisition of the actual weight and operating condition data of the preceding car; calculation of dynamic flow control thresholds and dynamic weight compliance thresholds based on the operating condition data, preset threshold calculation formulas, and initialized formula parameters; execution of three-stage coordinated control of different flow rates in the preceding and following chutes based on the comparison results of the actual weight and the two thresholds; and after loading a single car, iterative optimization of iterable coefficients using a gradient descent algorithm based on loading errors and preset convergence conditions, for use in threshold calculation for the next car. This allows for dynamic adaptive adjustment of the thresholds, enabling precise control and fundamentally avoiding overloading problems. It not only provides stable weight control accuracy but also possesses a fully closed-loop self-learning capability, requiring no manual intervention.

A control device that controls operation of a valve body of a valve device, includes a flow rate acquisition unit that acquires a flow rate of the valve device, a flow state determination unit that determines whether or not a flow of hydraulic fluid of the valve device is a transient flow state based on an input flow rate target value and a flow rate estimated value estimated by the flow rate acquisition unit, an opening command calculation unit that calculates an opening command based on the flow rate target value and a pressure difference before and after the valve device, and a valve body control unit that controls operation of the valve body, the valve body control unit controlling operation of the valve body based on the opening command when the flow state determination unit determines that it is not a transient flow state, and controlling operation of the valve body based on the flow rate target value when the flow state determination unit determines that it is a transient flow state.

To provide a pressure type flow rate control device with improved control accuracy.SOLUTION: Flow rate control devices 10, 50 each include a control valve 11, a throttle section 12 provided downstream of the control valve, a differential pressure sensor 20 that measures a differential pressure between the upstream and downstream sides of the throttle section, pressure sensors 13, 19 that measure the pressure downstream or upstream of the throttle section, and a calculation control circuit 16. The flow rate control device controls the control valve so that a calculated flow rate, which is determined based on outputs P1 and P2 of the pressure sensors and an output ΔP of a differential pressure sensor, becomes a set flow rate, and is also configured so that the differential pressure ΔP output by the differential pressure sensor is corrected based on the outputs P1 and P2 of the pressure sensors by referring to preset correction information, and the flow rate is controlled based on a corrected differential pressure ΔP'.SELECTED DRAWING: Figure 2

A system includes a flow sensor contained within a flow sensor housing, a base, and a seal. The base houses a controller that generates at least one operation modification signal, and the flow sensor is separable from and mountable onto the base. A bottom surface of the flow sensor housing includes the seal. The seal forms a liquid-tight engagement between the flow sensor housing and the base when the flow sensor is mounted onto the base.

A method for monitoring a gas system comprises determining a fuel mass flow rate requirement of a consumer system (e.g., fuel cell system comprising a fuel cell assembly), closing a first valve device in order to interrupt a gas feed from a tank into a high-pressure pipe system connecting the tank to the consumer system, capturing a pressure curve in the high-pressure pipe system while the first valve device is closed, in particular by means of a pressure sensor, determining a theoretical actual mass flow rate in the high-pressure pipe system on the basis of the captured pressure curve, comparing the theoretical actual mass flow rate in the high-pressure pipe system with the determined fuel mass flow rate requirement of the consumer system, and generating an error signal by means of a control device if the theoretical actual mass flow rate deviates from the fuel mass flow rate requirement by more than a threshold value.

This gas supply system for supplying gas to the inside of a processing chamber comprises: a plurality of gas supply flow paths configured to be able to supply gas independently to the processing chamber; a flow rate controller disposed on each of the gas supply flow paths; a primary-side valve disposed on the upstream side of the flow rate controller in the gas supply flow paths; a primary-side gas exhaust flow path that branches off between the primary-side valve and the flow rate controller in the gas supply flow paths and is connected to a primary-side exhaust mechanism; a primary-side exhaust valve disposed in the primary gas exhaust flow path; a secondary-side valve disposed on the downstream side of the flow rate controller in the gas supply flow paths; a secondary-side gas exhaust flow path that branches off between the secondary-side valve and the flow rate controller in the gas supply flow paths and is connected to a secondary-side exhaust mechanism; and a secondary-side exhaust valve disposed in the secondary-side gas exhaust flow path. The flow rate controller has a control valve connected to the primary-side valve and the secondary-side valve, and a control-side orifice disposed between the control valve and the secondary-side valve.

[0006] Several embodiments of a fast gas exchange (FGE) manifold are provided herein. In some embodiments, the FGE manifold includes a manifold housing having a plurality of inlets and a plurality of outlets for flowing a plurality of process gases through the manifold housing, the plurality of outlets corresponding to a plurality of zones in a process chamber, a plurality of hybrid valves disposed within the manifold housing and fluidly coupled to the plurality of inlets, a plurality of mass flow controllers disposed within the manifold housing downstream of the plurality of hybrid valves, a plurality of mixing lines extending downstream from the plurality of mass flow controllers to a plurality of outlet lines, and a plurality of outlet valves disposed along corresponding ones of the plurality of outlet lines, wherein a flow path is defined between each inlet of the plurality of inlets and each outlet of the plurality of outlets.

The application relates to the technical field of oxygen flow control of an oxygen generator, and discloses an oxygen generator flow automatic control method and system, an oxygen generator flow automatic control method, which comprises the following steps: configuring a target oxygen configuration flow and a target oxygen concentration required by target personnel; acquiring actual oxygen flow and actual oxygen concentration in real time; calculating an effective oxygen uptake deviation; when the effective oxygen uptake deviation is not lower than a specified oxygen uptake, dynamically acquiring a short-time oxygen configuration flow; generating a flow control signal through a preset PID control algorithm based on the deviation between the short-time oxygen configuration flow and the actual oxygen flow; and driving a flow adjustment actuator to output oxygen according to the flow control signal; a first parameter group is adopted during an inhalation phase of the target personnel, and a second parameter group is adopted during an exhalation phase of the target personnel, wherein, and, the response delay of the patient during a rapid inhalation phase is reduced, the oxygen waste during the exhalation phase is reduced, and the method is especially suitable for irregular breathing modes of COPD patients.

A valve system 350 for facilitating triple redundancy that is based on three pilot operated 5X2 solenoid valves (SOVs) incorporates isolation valves 500 to individually isolate any of the three SOVs 302 without affection functioning of the valve system 350, and visual indicator valves (VIVs) 400 to indicate true state of the corresponding solenoid valve 302. The isolation valves 500 include six valve side ports coupled to the ports of the corresponding SOV, and six line side ports coupled to fluid lines. VIVs 400 receive pressure signals from more than one fluid lines fluidically coupled to the corresponding SOV 302, and processes the pressure signals to move to an open position for providing an output pressure signal indicative of an energized state of The SOV 302.

This application provides a gas mass flow feedback control system and method, applied to a gas mass flow controller. The system includes: a pipeline signal acquisition module for acquiring the actual pressure and temperature signals of the pipeline under test; a calibration module including a calibration tank of known volume, for acquiring the calibration pressure and calibration temperature signals of the calibration pipeline; and a control module connected to the pipeline signal acquisition module and the calibration module, for calculating the gas mass flow measurement value based on the actual pressure, actual temperature, calibration pressure, and calibration temperature signals, and generating a flow mapping relationship based on the gas mass flow measurement value and the target value of the pipeline under test, which is then fed back to the gas mass flow controller to ensure gas flow consistency.

A method includes insonifying, using at least one transducer, a vessel using first ultrasound energy of a first frequency, receiving, using the at least one transducer, a first analogue signal obtained using the first ultrasound energy, determining, using processing circuitry, a first material property of the vessel based on a first frequency response signature of the first analogue signal, insonifying, using the at least one transducer, a fluid in the vessel using second ultrasound energy of a second frequency lower than the first frequency, the second ultrasound energy creating cavitation of bubbles in the fluid to be measured, receiving a second analogue signal obtained using the second ultrasound energy and energy created by the cavitation of the bubbles in the fluid, and identifying a second material property of the fluid based on the first material property and a second frequency response signature of the second analogue signal.

There is described a controller and method for managing a flow unit (322-326). A measured pressure drop corresponding to a full open position of a flow control element (346-350) is detected. A calibration pressure drop at full open is established based on the measured pressure drop, and relative pressure drops are calculated based on the calibration pressure drop at full open and calibration pressure drops corresponding to calibration positions of the element (346-350). Subsequent to calibration, an operation pressure drop of the flow unit (322-326) and an operation position of the element (346-350) are detected. A dynamic nominal is determined based on the operation pressure drop and a particular relative pressure drop corresponding to the operation position. An operation relative flow and a relative flow setpoint are determined based, in part, on the dynamic nominal. The operation position of the flow control element (346-350) is controlled based the operation relative flow and relative flow setpoint.

The present invention provides a system and method for precisely dividing an inlet fluid flow into multiple outlet flows. [Solution] A method and apparatus for the controlled division of a fluid flow into multiple channels, wherein an input command specifies the flow rate in each channel as a percentage of the total flow rate. The flow rate in each channel is controlled by a valve that can be moved to a specified position, the position being determined as a function of the specified percentage, the pressure upstream of the valve, and the pressure downstream of the valve.

The application relates to the technical field of gas valve flow regulation, in particular to an axial flow type gas valve and a self-adaptive flow intelligent regulation system thereof. The regulation system collects the minimum opening degree, the maximum opening degree, the inlet pressure, the outlet pressure and the instantaneous flow of the valve; calculates the pressure difference and the initial opening degree of the valve, calculates the power demand factor at the collection moment, determines the starting power of the motor and starts the motor, and calculates the valve regulation gentleness of the valve at the collection moment; and according to the valve regulation gentleness, the flow of the axial flow type gas valve is regulated. The application can self-adaptively regulate the valve flow.

Measuring and actively managing gas production in a downhole electrical submersible pump, such as for liquid hydrocarbon well production. A controller monitors pump motor electrical current data and performs a motor current signature analysis to calculate a Gas Production Index (GPI) value indicating a relative amount of gas being produced by the well at a particular time. The controller then responsively uses the calculated present GPI value as a synthetic process variable in a closed control loop, by dynamically adjusting the pump motor speed to achieve a target amount of liberated gas as estimated by a future GPI value.

The application discloses a kind of pump unit and valve pipeline system digital operation energy efficiency health self-healing two-way double linkage control system and its operating characteristic control method, comprising: pump group sensor, for collecting the operation energy efficiency health parameters of pump group;Motor sensor, for collecting the operation energy efficiency health parameters of motor;Valve actuator sensor, for collecting the operation energy efficiency health parameters of valve actuator;Valve sensor, for collecting the operation energy efficiency health parameters of valve;Pump unit-gate valve operation real-time two-way double linkage controller, for obtaining the data of pump group sensor, motor sensor, valve actuator sensor and valve sensor, when data changes, with the operation energy efficiency index and health reliability of pump optimal as target, data processing and analysis are carried out.The application utilizes the frequency converter unit of pump unit and valve actuator control unit to carry out interactive control adjustment, realizes pump unit and valve system operation energy efficiency health self-healing two-way linkage work.

The utility model discloses a pipeline gas flow control device, including airflow control pipe body, T type tee pipe joint, servo electric jar, thimble, temperature sensor and air inlet pressure sensor. Airflow control pipe body inside passage is laval pipeline, one group pipe orifice of two groups of coaxial pipe orifice on T type tee pipe joint body is connected with the port of adjacent laval pipeline air inlet on airflow control pipe body, servo electric jar is located in another group pipe orifice end in two groups of coaxial pipe orifice on T type tee pipe joint, and the piston rod of servo electric jar is inserted into T type tee pipe joint inside and is equipped with the thimble of inserting laval pipeline inside, and temperature sensor and air inlet pressure sensor all are located in the branch pipe body with two groups of coaxial pipe orifice axial vertical branch on T type tee pipe joint body, and the branch pipe body is connected with compressed gas source pipe body. The utility model discloses can realize control flow, steady flow.

System, product and method for controlling an industrial process in a factory, the industrial process involving a flow of material, the method comprising using a hardware processor for accepting a definition and / or information regarding a route extending from a source (e.g., raw material tank) to a destination (e.g., filler), along which the material flows and / or, accordingly, automatically activating and / or de-activating material flow along the route.

The present application belongs to the technical field of detecting gas flow control, and particularly relates to a flow control method suitable for on-line detection of SF6 gas by spectroscopy. The flow control method is realized by a flow control device suitable for on-line detection of SF6 gas by spectroscopy. The present application changes the temperature in the gas storage tank by a semiconductor refrigeration module, so that the gas pressure in the gas storage tank is stabilized at a pressure value required for a flow of 300 mL / min. The pressure in the gas storage tank is controlled at a pressure value corresponding to the pressure difference by the semiconductor refrigeration module, so that the spectroscopic detection unit detects at the gas flow rate, and has high precision. The present application can effectively reduce the economic cost, has the characteristics of small volume and convenient on-site installation, and can be widely applied to gas flow control when SF6 gas is detected on-line by spectroscopy.

The application discloses a heat exchanger pressure drop automatic testing system and testing method. The system includes a double-range parallel gas supply module, a pressure acquisition module, a parameter storage module and a controller. The double-range parallel gas supply module is provided with a main pipeline and parallel first and second branch pipes, and the opening and closing are controlled by a pneumatic ball valve, and the automatic switching of large and small range test modes is realized in combination with two-stage flow meters; the pressure acquisition module includes a gauge pressure sensor and an absolute pressure sensor, and is used for acquiring pipeline pressure and performing real-time compensation of environmental atmospheric pressure; the parameter storage module supports one-key loading of test parameters of multiple models of heat exchangers; the controller controls flow closed-loop regulation, synchronously acquires gas pressure data to calculate compensated pressure drop values, and fits a measured pressure drop curve based on multi-point pressure drop data to perform performance qualification determination in a full flow interval. The application can meet full-range automatic testing requirements on a single platform, eliminates environmental and human errors, and significantly improves testing accuracy.

A method includes receiving, by a first wireless valve switch system of a wireless sprinkler valve system via a wireless network, first encoded valve instructions that were encoded by a control system using a key. The method further includes decoding the first encoded valve instructions using the key to generate decoded valve instructions. The method further includes determining whether the decoded valve instructions correspond to the first wireless valve switch system. The method further includes generating a response to the decoded valve instructions. The method further includes encoding the response using the key to generate an encoded response. The method further includes transmitting, via the wireless network, the encoded response to the control system to cause the control system to perform a corresponding action.

The application discloses a groundwater sampling flow control system, which comprises an ultrasonic flow detection module, a flow control module, a data processing and storage module, a display module and a portable integrated box. The measurement range of the ultrasonic flow detection module is 0-20 L / min, and the precision control is ±0.1%. The flow rate and flow are calculated by detecting the time difference of the forward and reverse flow propagation of sound in the groundwater fluid. The flow control module cooperates with a sampling pump to realize accurate flow regulation and control. The data processing and storage module can calculate the cumulative flow, store historical data and support USB export. The display module realizes the digital real-time display of the flow rate, cumulative flow, battery capacity and other information. The system realizes accurate control and measurement of the groundwater sampling flow, avoids sample pollution, is portable and easy to operate, can record the well washing state, and meets the national standard requirements for VOC water sample collection.

The application relates to the technical field of industrial control, in particular to an intelligent water conservancy storage device with an automatic adjusting function and a control method, which solves the technical problem that the prior art only establishes a prediction model according to water body data, ignores the equipment condition of a water gate, and leads to an unsatisfactory regulation effect. The method comprises the following steps: acquiring index data of multiple indexes of a monitored water gate at multiple acquisition moments of a monitoring period; mapping the index data to a multidimensional sample space, and analyzing the data distribution of the index data; comparing the data distribution of multiple monitoring periods, analyzing the recession degree of each index, and analyzing the index correlation degree between each index and other indexes; adjusting the water gate opening degree of the current monitoring period according to the index data, the data distribution, the recession degree of each index and the index correlation degree of the current monitoring period, obtaining a pre-regulation opening degree of the next monitoring period; and regulating the water gate opening degree of the next monitoring period based on the pre-regulation opening degree.

A computer-implemented method for determining an optimized control of flow entities of a hydrocarbon reservoir includes obtaining a meshed representation of flow entities, wherein each flow entity is described by a flow entity node and each link between the flow entities is described a flow entity edge; the flow entity nodes being ordered using ranks according to a flow entity property and the flow entity edges being ordered using ranks according to a flow entity relationship property; determining at any simulated time an order of the flow entity nodes using ranks according to a combined node-edge property derived from a flow entity property and a flow entity relationship property; applying at a variation parameter to the properties; and determining the optimized control of the flow entities from at least an order of the flow entities determined using an optimization of a cost function, the variation parameter being an optimization variable.

The present application belongs to the technical field of fluid delivery control, and particularly relates to an electronic control method for a flow proportional valve of a fluid delivery pipeline, comprising: collecting multi-source sensor monitoring data including flow, pressure, coil voltage and coil current, and obtaining pretreated monitoring data after smoothing processing; obtaining a fluid resistance response coefficient based on the pressure monitoring value and the flow monitoring value in the pretreated monitoring data; obtaining a heating loss correction amount based on the coil voltage monitoring value and the coil current monitoring value; dynamically obtaining a duty cycle of a control signal of the flow proportional valve in combination with a flow target value, a flow monitoring value, the fluid resistance response coefficient and the heating loss correction amount; generating a pulse voltage based on the duty cycle of the control signal and driving the flow proportional valve to correct the displacement amount of a valve core of the flow proportional valve under a complex pressure and thermal environment. The present application solves the problem of control inaccuracy caused by pressure fluctuation and thermal attenuation of an actuator.

The application discloses a liquid flow control system for liquid crystal panel cleaning equipment, and relates to the technical field of liquid crystal panel manufacturing equipment control, and comprises the following steps: S1, determining the liquid flow control object and cleaning working condition of the liquid crystal panel cleaning equipment; S2, using the cleaning working condition and the liquid flow control object to construct corresponding liquid flow reference; S3, using the flow reference result to construct the liquid flow distribution and execution association; S4, using the liquid flow control state set to integrate the operation constraint; and S5, using the controlled liquid flow state to construct the system-level output of the liquid flow control system. The liquid flow reference can be directly implemented, clear and referenced flow reference results can be provided for each cleaning function unit under different cleaning working conditions, and therefore, a unified and reliable basis is provided for the liquid flow distribution and execution association construction.