自動化儀表-01

1、 Zhengzhou University of Light IndustryDepartment of Electrical & Information EngineeringTelmail: Zhengzhou University of Light IndustryZhengzhou University of Light IndustryZhengzhou University of Light IndustryPage:Page:2 22022-6-12022-6-1教材：控制儀表及裝置教材：控制儀表及裝置主編：吳勤勤主編：吳勤勤化學工業(yè)出版社化學工業(yè)出版社

2、2008年年1月月 第第3版版ISBN 978-7-5025-9923-2Zhengzhou University of Light IndustryZhengzhou University of Light IndustryZhengzhou University of Light IndustryPage:Page:3 32022-6-12022-6-1課程學時：課程學時：40學時（理論學時（理論34學時，實驗學時，實驗6學時）學時）參考書籍：參考書籍：1厲玉鳴厲玉鳴.化工儀表及自動化化工儀表及自動化M.北京北京:化學工業(yè)出版社化學工業(yè)出版社,20032王玲生王玲生.熱工檢測儀表熱工檢測儀

3、表M.北京北京:冶金工業(yè)出版社冶金工業(yè)出版社,19943龔家彪龔家彪.熱工測量和儀表熱工測量和儀表M.北京北京:中國工業(yè)出版社中國工業(yè)出版社,19954宋佳霖宋佳霖.電動控制儀表技術原理電動控制儀表技術原理M.北京北京:化學工業(yè)出版社化學工業(yè)出版社,20045劉巨良劉巨良. 過程控制儀表過程控制儀表M.北京北京:化學工業(yè)出版社化學工業(yè)出版社,20086王可華王可華. 石油儀表及自動化石油儀表及自動化M. 北京北京:石油工業(yè)出版石油工業(yè)出版 社，社，20067何道清何道清.儀表與自動化儀表與自動化M.北京：化學工業(yè)出版社北京：化學工業(yè)出版社,2008Zhengzhou University of

4、 Light IndustryZhengzhou University of Light IndustryZhengzhou University of Light IndustryPage:Page:4 42022-6-12022-6-1Zhengzhou University of Light IndustryZhengzhou University of Light IndustryZhengzhou University of Light IndustryPage:Page:5 52022-6-12022-6-1Zhengzhou University of Light Industr

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6、versity of Light IndustryZhengzhou University of Light IndustryPage:Page:9 92022-6-12022-6-1自動化儀表自動化儀表模擬式儀表模擬式儀表數(shù)字式儀表數(shù)字式儀表控制器控制器變送器變送器轉(zhuǎn)換器轉(zhuǎn)換器運算器運算器附加單元附加單元執(zhí)行器執(zhí)行器可編程調(diào)節(jié)器可編程調(diào)節(jié)器PLC智能變送器智能變送器閥門定位器閥門定位器DCSFCSZhengzhou University of Light IndustryZhengzhou University of Light IndustryZhengzhou University of

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11、ngzhou University of Light IndustryZhengzhou University of Light IndustryZhengzhou University of Light IndustryPage:Page:19192022-6-12022-6-1Zhengzhou University of Light IndustryZhengzhou University of Light IndustryZhengzhou University of Light IndustryPage:Page:20202022-6-12022-6-1Zhengzhou Unive

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17、yZhengzhou University of Light IndustryPage:Page:31312022-6-12022-6-1精密度表示多次重復測量中，傳感器測得的值彼此之間精密度表示多次重復測量中，傳感器測得的值彼此之間的重復性或分散性大小的程度。它反映隨機誤差的大小的重復性或分散性大小的程度。它反映隨機誤差的大小，隨機誤差越小，測得的值就越密集，重復性越好，精，隨機誤差越小，測得的值就越密集，重復性越好，精密度越高。密度越高。正確度表示多次重復測量中，傳感器測得值的算術平均正確度表示多次重復測量中，傳感器測得值的算術平均值與真值的接近程度。它反映系統(tǒng)誤差的大小，系統(tǒng)誤值與真值的

18、接近程度。它反映系統(tǒng)誤差的大小，系統(tǒng)誤差愈小，測得值的算術平均值就愈接近真值，正確度愈差愈小，測得值的算術平均值就愈接近真值，正確度愈高。高。準確度表示多次重復測量中，傳感器測得值與真值的一準確度表示多次重復測量中，傳感器測得值與真值的一致的程度。它反映隨機誤差和系統(tǒng)誤差的綜合大小，只致的程度。它反映隨機誤差和系統(tǒng)誤差的綜合大小，只有當有當隨機誤差和系統(tǒng)誤差隨機誤差和系統(tǒng)誤差都小時，準確度才高。準確度也都小時，準確度才高。準確度也簡稱精度。簡稱精度。Zhengzhou University of Light IndustryZhengzhou University of Light Indus

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20、 University of Light IndustryPage:Page:34342022-6-12022-6-1Zhengzhou University of Light IndustryZhengzhou University of Light IndustryZhengzhou University of Light IndustryPage:Page:35352022-6-12022-6-1Zhengzhou University of Light IndustryZhengzhou University of Light IndustryZhengzhou University

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26、Zhengzhou University of Light IndustryZhengzhou University of Light IndustryZhengzhou University of Light IndustryPage:Page:47472022-6-12022-6-1Zhengzhou University of Light IndustryZhengzhou University of Light IndustryZhengzhou University of Light IndustryPage:Page:48482022-6-12022-6-1Zhengzhou Un

27、iversity of Light IndustryZhengzhou University of Light IndustryZhengzhou University of Light IndustryPage:Page:49492022-6-12022-6-1Zhengzhou University of Light IndustryZhengzhou University of Light IndustryZhengzhou University of Light IndustryPage:Page:50502022-6-12022-6-1組組成成自動化裝置自動化裝置被控對象被控對象測量

28、元件與變送器測量元件與變送器自動控制器自動控制器執(zhí)行器執(zhí)行器Zhengzhou University of Light IndustryZhengzhou University of Light IndustryZhengzhou University of Light IndustryPage:Page:51512022-6-12022-6-1Zhengzhou University of Light IndustryZhengzhou University of Light IndustryZhengzhou University of Light IndustryPage:Page:52

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30、22-6-1左圖是乙烯生產(chǎn)過左圖是乙烯生產(chǎn)過程中脫乙烷塔的工程中脫乙烷塔的工藝管道及控制流程藝管道及控制流程圖圖 舉例舉例Zhengzhou University of Light IndustryZhengzhou University of Light IndustryZhengzhou University of Light IndustryPage:Page:55552022-6-12022-6-1 檢試點檢試點是由工藝設備輪廓線或工藝管線引到儀表圓是由工藝設備輪廓線或工藝管線引到儀表圓圈的連接線的起點，一般無特定的圖形符號，如下圖圈的連接線的起點，一般無特定的圖形符號，如下圖所示。必

31、要時，檢測元件也可以用象形或圖形符號表所示。必要時，檢測元件也可以用象形或圖形符號表示。示。Zhengzhou University of Light IndustryZhengzhou University of Light IndustryZhengzhou University of Light IndustryPage:Page:56562022-6-12022-6-1 通用的儀表信號線均以細實線表示。連接線通用的儀表信號線均以細實線表示。連接線表示交叉及相接時，采用下圖的形式。必要時也表示交叉及相接時，采用下圖的形式。必要時也可用加箭頭的方式表示信號的方向?？捎眉蛹^的方式表示信號的方向。Zhengzhou University of Light IndustryZhengzhou University of Light IndustryZhengzhou University of Light IndustryPage:Page:57572022-6-12022-6-1 儀表的圖形符號是一個細實線圓圈，直徑約儀表的圖形符號是一個細實線圓圈，直徑約10mm，對于不同的儀表安裝位置的圖形符號如，對于不同的儀表安裝