what is electro-pneumatic system?
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Air systems, regardless of compressor design or capacity, can operate more efficiently and economically through the proper selection and optimization of the control system used with the compressor unit.Compressor control systems have long had the ability to monitor and adjust basic air compressor functions, associated with monitoring, loading, unloading and throttling. Now, some systems provide additional features such as trend analysis, predictive maintenance schedules as well as remote monitoring and operations.compressor control systems function on a demand cycle. If the demand for compressed air is steady and does not fluctuate, compressor controls simply match the capacity to the system demand. One basic form of compressor flow control is called inlet throttling, or inlet unloading. \nReducing the air flow is achieved by reducing the inlet opening through which the air enters the compressor. This, in turn, matches the compressor output to the system demand. Because system pressure acts a s a demand indicator, throttling is usually controlled by system pressure. However, most air systems are more complex and demand is more variable than the one described. \nProcesses with complicated and varying demand cycles, which can include several compressors of different sizes and configurations to maintain system pressure, require a more sophisticated control system. The most common of these systems is the electro-pneumatic control system. \nMore than 70 percent of all existing air compressors utilize electro-pneumatic control systems. These compressors feature electric and mechanically controlled devices -- such as pressure switches, solenoid valves and metering pins -- that adjust the loading and unloading through the use of an inlet throttle and/or a bypass valve. These control systems typically rely on mechanical pressure switches to monitor the compressor's proper discharge pressure. In addition, electro-pneumatic systems typically feature a series of mechanical trip switches that will discontinue compressor operation when pressures or temperatures reach critical levels.The electro-pneumatic action is a control system for pipe organs whereby air pressure, controlled by an electric current and operated by the keys of an organ console, opens and closes valves within wind chests, allowing the pipes to speak. This system also allows the console to be physically detached from the organ itself. The only connection was via an electrical cable from the console to the relay, with some early organ consoles utilizing a separate wind supply to operate combination pistons.\nAlthough early experiments with Barker lever, tubular-pneumatic and electro-pneumatic actions date as far back as the 1850s, credit for a feasible design is generally given to the English organist and inventor, Robert Hope-Jones. He overcame the difficulties inherent in earlier designs by including a rotating centrifugal air blower and replacing banks of batteries with a DC generator, which provided electrical power to the organ and drove the blower. This allowed the construction of new pipe organs without any physical linkages whatsoever. Previous organs all used tracker action, which requires a mechanical linkage between the console and the organ.\nThe basic operation of the system is as follows: when the organist selects a stop and depresses a key, an electric circuit is completed, causing a low-voltage current to flow from depressed key, through the stop-tab switch, and on through the cable to the electro-pneumatic relay. The relay interprets the command from the console and sends an electric current to the appropriate solenoid. The solenoid is energized, causing the pipe valve connected to it to open, which emits compressed air into the pipe, allowing the pipe to speak.\nThe system was an unqualified success. However, the single, most significant drawback to the system was in the massive amount of wiring required for operation. With each stop tab and key being w
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Understand the lever system of the beds.\nUnderstand water flow for suspension of IV injection bags.\n\nFrankly, physics is not that important in medicine.
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see:\nhttp://en.wikipedia.org/wiki/EngineerIng
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Hydraulic technology relies on the fact that liquid, unlike gases and solids, cannot be compressed. Put some water in a bucket and try to push it down. Right—it can't be done. The water is displaced. Imagine an apparatus made of three components: a reservoir divided into two sections (one small, one large) with a passage between the two sections. In each section is a piston. If you fill the reservoir with fluid and then apply pressure to the small piston (called a master cylinder), the large piston will rise.
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Pulsameter make a good pumping system.
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The system uses high voltage to ionize molecules in the air mostly oxygen to ozone. Ions have an electric charge sort of like static electricity they attract dust particles and create a heavier particle that falls out of the air. also dust particles are attracted to the high voltage plates much like your tv screen attracts dust.
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hydrmatic, pneumatic. electronic
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Use of pressurized gases to do work.\n\nFor more info, see this:\nhttp://en.wikipedia.org/wiki/Pneumatic
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It's an Electrical unit of power... Think of water, voltage equals speed of flow, Amp equals the pressure behind it....  Very simple terms..
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In typical DC motors, there are brushes that ride on the shaft of the motor and make connections to the motor coils.  As the motor spins, the brushes are direct the electricity to the proper coil.  Note, the magnets are stationary, and the coils rotate.  It is a simple system, but every time the circuit "breaks" you get a little spark.  They are very electrically noisy, as one might expect when you see little sparks if you watch the motor.\nAn ECM has stationary coils and rotating magnets.  A sensor determines the shaft position and directs current to the appropriate coil.  This is all done electronically.  It is an electrically "quiet" system and since there are no brushes to wear out, it can also be very reliable.
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Pressure relief valves are valves designed to open at a certain pressure, usually to protect equipment from rupturing due to high pressure.\n\nMost industrial pressure relief valves are spring loaded devices that will pop open at the pre-set pressure, and then re-seat after the pressure has fallen low enough.\n\nIf you have a hot water tank in your home, it probably has a pressure relief valve, designed to blow off some water if the pressure gets high in the tank, to prevent the tank from exploding dangerously.
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Polybutylene terephthalate (PBT) is a plastic that is used as an insulator in the electrical and electronics industries. It is a thermoplastic crystalline polymer, and a type of polyester. PBT is resistant to solvents, shrinks very little during forming, is mechanically strong, heat-resistant up to 150°C (or 200°C with glass-fibre reinforcement) and can be treated with flame retardants to make it noncombustible.
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mechanical or electronic?
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pneumatics means the air-pressure that could be used to actuate a on/off valve (or) a control valve (or) a piston etc.\n\nmechantronics is the study of the application of mechanical engineering combined with electronics.\n most of its concentration is on Robotics sort of applications.
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Some pressure transducers are a piezo electric crystal and the pressure forms a voltage across the crystal. Works for sound as well.
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It's spelled piezo.\n\nA material which exhibits the piezo-electric effect produces a voltage across one axis when struck or flexed in another axis.  \n\nIn gas stove and barbecue lighters and the pens which you speak of the resultant voltage is stepped up via a transfomer.\n\nThe same effect is used in "crystal" microphones and was used in crystal pick-up cartridges.
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On-off valves can have mechanical, pneumatic, hydraulic or electromagnetic actuation. See ref.