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- этимология
fluid-flow controller - перевод на русский
нефтегазовая промышленность
регулятор расхода жидкости
строительное дело
объёмный расход
нефтегазовая промышленность
объёмная скорость течения
объёмный расход
общая лексика
дисковый контроллер, контроллер диска
плата расширения и/или микросхема, обеспечивающая взаимодействие процессора с дисковым накопителем
![A [[block diagram]] of a PID controller in a feedback loop. ''r''(''t'') is the desired process value or setpoint (SP), and ''y''(''t'') is the measured process value (PV).](https://commons.wikimedia.org/wiki/Special:FilePath/PID en.svg?width=200 "A [[block diagram]] of a PID controller in a feedback loop. ''r''(''t'') is the desired process value or setpoint (SP), and ''y''(''t'') is the measured process value (PV).")
![Early PID theory was developed by observing the actions of [[helmsmen]] in keeping a vessel on course in the face of varying influences such as wind and sea state.](https://commons.wikimedia.org/wiki/Special:FilePath/Scross helmsman.jpg?width=200 "Early PID theory was developed by observing the actions of [[helmsmen]] in keeping a vessel on course in the face of varying influences such as wind and sea state.")
строительное дело
ПИД-регулятор, пропорционально-интегральный (изодромный) регулятор с предварением
![tip vortex]] from an [[airplane]] wing passing through coloured smoke](https://commons.wikimedia.org/wiki/Special:FilePath/Airplane vortex edit.jpg?width=200 "tip vortex]] from an [[airplane]] wing passing through coloured smoke")
![laser-induced fluorescence]]. The jet exhibits a wide range of length scales, an important characteristic of turbulent flows.](https://commons.wikimedia.org/wiki/Special:FilePath/False color image of the far field of a submerged turbulent jet.jpg?width=200 "laser-induced fluorescence]]. The jet exhibits a wide range of length scales, an important characteristic of turbulent flows.")
![Laminar]] and turbulent water flow over the hull of a submarine. As the relative velocity of the water increases turbulence occurs.](https://commons.wikimedia.org/wiki/Special:FilePath/Los Angeles attack sub 2.jpg?width=200 "Laminar]] and turbulent water flow over the hull of a submarine. As the relative velocity of the water increases turbulence occurs.")
Определение
Википедия
A mass flow controller (MFC) is a device used to measure and control the flow of liquids and gases. A mass flow controller is designed and calibrated to control a specific type of liquid or gas at a particular range of flow rates. The MFC can be given a setpoint from 0 to 100% of its full scale range but is typically operated in the 10 to 90% of full scale where the best accuracy is achieved. The device will then control the rate of flow to the given setpoint. MFCs can be either analog or digital. A digital flow controller is usually able to control more than one type of fluid whereas an analog controller is limited to the fluid for which it was calibrated.
All mass flow controllers have an inlet port, an outlet port, a mass flow sensor and a proportional control valve. The MFC is fitted with a closed loop control system which is given an input signal by the operator (or an external circuit/computer) that it compares to the value from the mass flow sensor and adjusts the proportional valve accordingly to achieve the required flow. The flow rate is specified as a percentage of its calibrated full scale flow and is supplied to the MFC as a voltage signal.
Mass flow controllers require the supply gas or liquid to be within a specific pressure range. Low pressure will starve the MFC of fluid and cause it to fail to achieve its setpoint. High pressure may cause erratic flow rates. There are many different technologies which can help to measure the flow of the fluids and eventually help in controlling flow. Those technologies define the types of Mass Flow Controllers, and they include differential pressure (ΔP), differential temperature (ΔT), Coriolis, Ultrasonic, electromagnetic, turbine, etc.
