flow control devices

См. также в других словарях:

• Flow control valve — Globe control valve with the pneumatic actuator and smart positioner A flow control valve regulates the flow or pressure of a fluid. Control valves normally respond to signals generated by independent devices such as flow meters or temperature… …   Wikipedia

• flow control —    1. In communications, control of the rate at which information is exchanged between two computers over a transmission channel. Flow control is needed when one of the devices cannot receive the information at the same rate as it can be sent,… …   Dictionary of networking

• Software flow control — is a method of flow control used in computer data links, especially RS 232 serial. It uses special codes, transmitted in band, over the primary communications channel. These codes are generally called XOFF and XON (from transmit off and on ,… …   Wikipedia

• Flow measurement — is the quantification of bulk fluid movement. Flow can be measured in a variety of ways. Positive displacement flow meters acumulate a fixed volume of fluid and then count the number of times the volume is filled to measure flow. Other flow… …   Wikipedia

• Control valves — are valves used to control conditions such as flow, pressure, temperature, and liquid level by fully or partially opening or closing in response to signals received from controllers that compare a setpoint to a process variable whose value is… …   Wikipedia

• Control engineering — Control systems play a critical role in space flight Control engineering or Control systems engineering is the engineering discipline that applies control theory to design systems with predictable behaviors. The practice uses sensors to measure… …   Wikipedia

• control system — Means by which a set of variable quantities is held constant or caused to vary in a prescribed way. Control systems are intimately related to the concept of automation but have an ancient history. Roman engineers maintained water levels in… …   Universalium

• Control character — In computing and telecommunication, a control character or non printing character is a code point (a number) in a character set, that does not in itself represent a written symbol. It is in band signaling in the context of character encoding. All …   Wikipedia

• Control unit — A control unit in general is a central (or sometimes distributed but clearly distinguishable) part of the machinery that controls its operation, provided that a piece of machinery is complex and organized enough to contain any such unit. One… …   Wikipedia

• Flow battery — A flow battery is a form of rechargeable battery in which electrolyte containing one or more dissolved electroactive species flows through a power cell / reactor that converts chemical energy to electricity. Additional electrolyte is stored… …   Wikipedia

• Control theory — For control theory in psychology and sociology, see control theory (sociology) and Perceptual Control Theory. The concept of the feedback loop to control the dynamic behavior of the system: this is negative feedback, because the sensed value is… …   Wikipedia