Industrial - process control systems - methods of evaluating the performance of valve positioners with pneumatic outputs 工業(yè)過程控制系統(tǒng).氣動(dòng)輸出閥門定位器性能評(píng)價(jià)的方法
Industrial - process control systems - methods of evaluating the performance of valve positioners with pneumatic outputs 工業(yè)過程控制系統(tǒng).帶氣動(dòng)輸出的閥門定位器性能的評(píng)價(jià)方法
Industrial process control systems - methods of evaluating the performance of intelligent valve positioners with pneumatic outputs 工業(yè)過程控制系統(tǒng).氣動(dòng)輸出智能閥門定位器性能評(píng)價(jià)的方法
Industrial process control systems - part 2 : methods of evaluating the performance of intelligent valve positioners with pneumatic outputs 工業(yè)過程控制系統(tǒng).第2部分:氣動(dòng)輸出智能閥門定位器性能評(píng)定方法
Industrial - process control systems - part 2 : methods of evaluating the performance of intelligent valve positioners with pneumatic outputs 工業(yè)過程控制系統(tǒng).第2部分:氣動(dòng)輸出智能閥門定位器性能的評(píng)估方法
Industrial - process control systems - methods of evaluating the performance of valve positioners with pneumatic outputs iec 61514 : 2000 ; german version en 61514 : 2002 工業(yè)過程控制系統(tǒng).氣動(dòng)輸出閥門定位器性能評(píng)價(jià)方法
The upper end axis and screw on cylinder body accord with namur standard , it is for installation of feedback device of valve supply and valve locator 上端軸以及缸體上的螺孔符合namur標(biāo)準(zhǔn)。供閥位反饋裝置以及閥門定位器的安裝。
The valve positioner based on smart structure or on the fieldbus is becoming an increasingly important technique and is promoting the industry process control dramatically , and now which represents the development direction in the pneumatic actuator 閥門定位器向智能型、現(xiàn)場(chǎng)總線儀表方向發(fā)展,給過程控制帶來了深刻的變革,代表了氣動(dòng)執(zhí)行器技術(shù)的發(fā)展方向。
However , the research on it is still an immature technique in china . in this thesis , the author studied mainly the method for smart valve positioner which based on 4 ~ 20ma current , which can be configured with hart protocol , and using two - wire system 目前,國(guó)外一些大公司已相繼研制成功了智能閥門定位器,有的配置有hart協(xié)議、 profibus總線、 ff總線等現(xiàn)場(chǎng)總線接口;而國(guó)內(nèi)在這方面的研究尚處于起步階段。