- 學位論文
氣動控制閥及其數位電子式定位器之研究
Studies on Pneumatic Control Valve and Digital-Electronic Type Control Valve Positioner
摘要
本論文的研究分為二部份，第一部份是藉由實驗建立氣動控制閥的數學模式，了解氣動控制閥之特性以做為未來研究管路壓力動態及推導控制法則的依據。另一部份是探討將電能氣動轉換器、氣動式定位器、閥開度指示器，整合成一個我們命名為數位電子式控制閥定位器的可行性。此種控制閥定位器的開發包括軟、硬體兩方面：軟體方面主要是撰寫PC端的人機介面程式；而硬體方面則是設計與開發電動閥閥體和控制電路，最後再將所開發之控制閥定位器，實際應用於管路流體壓力控制，以驗證其性能。 總之，本研究的第一部份，在提供嚴謹的控制閥動態特性探討。第二部份則是一機電整合的創意實現，此數位電子式定位器，經由本研究已初步驗證其可行性，未來應加強改善其控制效果，若能開發完成，不但提供了將傳統的氣動控制閥，控制迴路數位化與網路化的途逕，更能節省傳統氣動元件因調校設備所耗費的工時。另外對提升本國閥工業的水平，應相當有助益。
並列摘要
This thesis contains two parts. One is the development of a mathematical model for the dynamics of pneumatic control valves. The mathematical model will help us in better understanding transient response of control valves. It also forms a basis in studying the pressure dynamics of a piping system and facilitates the formulation of control law. Another one is to investigate the feasibility of a digital-electronic type valve positioner in replacing the combination of E/P(electro-pneumatic transducer), pneumatic positioner and valve position transmitter. The developing of this valve positioner includes software and hardware tasks. In software, a GUI (Graphical User Interface) program is written in PC end. In hardware, the major work is to develop the body and the control circuits of the electronic valve. Finally, the valve positioner and the pneumatic control valve are used in the pressure control of fluid in a piping system to test their functions. All in all, one part of this thesis is to provide a strict discussion about the properties of a pneumatic control valve. Anther one is a originative implementation of mechatronic. The digital-electronic type valve positioner has shown its feasibility through the proof of this thesis. If the digital-electronic type valve positioner is developed successfully, it will reveal a changing path of valve control from a mechanical-pneumatic system to an electronic-digital system. The product will also deliver many benefits to the processes using it and, in the meantime, upgrade the technology level of the valve industry in our country.
參考文獻
延伸閱讀
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