【正文】 I 生物發(fā)酵過程自動加藥控制系統設計 摘 要 自動加藥設備在微生物發(fā)酵相關行業(yè)得到了很多的應用 ,這個設備的控制回路比較單一，自動化程度低。針對該問題，將這項設備技術中融入 PLC 控制， WinCC 組態(tài)控制的技術，設計出自動加藥的控制方案，實現了微生物發(fā)酵的自動加藥控制，并且此系統中上位機實時進行組態(tài)監(jiān)控，數據記錄，故障報警。 本文在介紹了生物發(fā)酵控制技術現如今的發(fā)展概況以及 PLC 在整個控制行業(yè)的應用情況，根據設計的要求，構建了由 PLC 作為下位機，西門子觸摸屏作為監(jiān)控面板的自動加藥控制系統。本文研究了微生物發(fā)酵自動加 藥的硬件選型和 PLC 軟件編程， WinCC 組態(tài)，以及PLC 與觸摸屏之間， PLC 與現場設備之間的信號采集與數據傳輸方式，接入了 ph，溫度， DO，液位等作為輸入參數，并且將實時的這些參數數據送往中央處理器進行處理，與設定值之間求差，并且將這一差值作為控制器的輸入值，經過 PID 控制處理過后的輸出值自動計算出蠕動泵運行的占空比。整個系統通過傳感器采集對象參數輸出的模擬量信號，在中央處理器中經過 相應 控制算法 的計算后 ， PID 給出 輸出的調節(jié)信號，控制 器件 隨之 對 整個控制系統進行控制，最終達到穩(wěn)態(tài)，使整個系統穩(wěn)定運行。 改造后 的微生物自動加藥控制系統集技術性、操作性、實用性、科研性于一體。在投入使用之后，運行穩(wěn)定，控制方便，自動化程度高，達到了設計的目的，實現了對于整個發(fā)酵系統實時的監(jiān)控，將這一技術應用到實際生產當中，能夠為微生物發(fā)酵行業(yè)帶來良好的經濟效益和環(huán)保效益。 關鍵詞： PLC 自動加藥 WinCC PID 控制 微生物發(fā)酵 I Automatic control system design of biological fermentation process Abstract Automatic dosing equipment in microbial fermentation industry gets a lot of applications, the device control loop is a single, low degree of automation. Aiming at this problem, will the device into the PLC control technology, WinCC configuration control technology, design of the automatic dosing control scheme, implements the automatic dosing control of microanism fermentation, and the system configuration PC realtime monitoring, data record, fault alarm. This paper introduces the biological fermentation control technology in today39。s development situation, as well as the application of PLC in the control industry, according to the requirements of design and constructed by PLC as lower machine, Siemens touch screen monitor panel as automatic dosing control system. This paper studies the microanism fermentation automatic dosing of hardware selection and software programming of PLC and WinCC configuration, as well as between PLC and touch screen, PLC and field devices between the signal acquisition and data transmission mode, access to the ph, temperature, DO, such as liquid level as the input parameters, and these parameters of realtime data to the CPU for processing, and the difference between the set point, and this difference as the controller input values, after treated with PID control of the output value automatically calculate the peristaltic pump running duty ratio. The whole system through the sensor output analog signal acquisition object parameters, these signals in the central processing unit (CPU) after the corresponding putation of the control algorithm, PID regulation of the output signal are given, the control device to control the whole control system, then finally reached steady state, the stable operation of the whole system. Modified microbe automatic dosing control system set of technical, operational, practicality, scientific research as a whole. After put into use, stable operation, easy to control, high degree of automation, achieve the goal of the design, has realized the realtime monitoring for the whole fermentation system, the applications of this technology to actual production, can bring good economic benefits for microbial fermentation industry and environmental benefits. Key words: PLC。 Automatic dosing； WinCC； PID control； Microbial fermentationIII 目 錄 摘 要 ........................................................................................................................................................................ I Abstract .................................................................................................................................................................... I 第一章 引言 ........................................................................................................................................................... 1 生物發(fā)酵過程自動加藥技術的發(fā)展與應用 ........................................................................................... 1 生物發(fā)酵過程自動加藥技術的發(fā)展背景 ................................................................................... 1 生物發(fā)酵過程自動加藥技術的現狀 ........................................................................................... 3 生物發(fā)酵過程自動加藥技術的應用前景 ................................................................................... 6 西門子可編程控制器 (PLC)的發(fā)展概況 ................................................................................................. 7 第二章 生物發(fā)酵自動加藥控制系統的組成及其儀表選型 ............................................................................. 11 PLC 200 Smart 控制器 ........................................................................................................................... 11 西門子視窗控制中心 SIMATIC 系列面板 Smart Line ........................................................................ 12 控制檢測部分 ........................................................................................................................................ 13 控制部分 ..................................................................................................................................... 13 檢測部分 ..................................................................................................................................... 16 第三章 生物發(fā)酵自動加藥控制系統的工作原理及運行特性 ......................................................................... 21 生物發(fā)酵自動加藥控制系統的工作原理 ............................................................................................ 21 生物發(fā)酵自動加藥控制系統的運行特性 ............................................................................................ 22 上下位機的通信流程 ............................................................................................................................ 29 第四章 控制系統編程 ......................................................................................................................................... 31 PLC 編程軟件 STEP7MICRO Win SMART ........................................................................................ 31 上位機組態(tài)監(jiān)控軟件 Win CC Flexible 2022 ...........................................