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1、生物发酵过程自动加药控制系统设计摘 要自动加药设备在微生物发酵相关行业得到了很多的应用,这个设备的控制回路比较单一，自动化程度低。针对该问题，将这项设备技术中融入 PLC 控制，WinCC 组态控制的技术，设计出自动加药的控制方案，实现了微生物发酵的自动加药控制，并且此系统中上位机实时进行组态监控，数据记录，故障报警。本文在介绍了生物发酵控制技术现如今的发展概况以及 PLC 在整个控制行业的应用情况，根据设计的要求，构建了由 PLC 作为下位机，西门子触摸屏作为监控面板的自动加药控制系统。本文研究了微生物发酵自动加药的硬件选型和 PLC 软件编程，WinCC 组态，以及 PLC 与触摸屏之间，
2、PLC 与现场设备之间的信号采集与数据传输方式，接入了 ph，温度，DO，液位等作为输入参数，并且将实时的这些参数数据送往中央处理器进行处理，与设定值之间求差，并且将这一差值作为控制器的输入值，经过 PID 控制处理过后的输出值自动计算出蠕动泵运行的占空比。整个系统通过传感器采集对象参数输出的模拟量信号，在中央处理器中经过相应控制算法的计算后，PID 给出输出的调节信号，控制器件随之对整个控制系统进行控制，最终达到稳态，使整个系统稳定运行。改造后的微生物自动加药控制系统集技术性、操作性、实用性、科研性于一体。在投入使用之后，运行稳定，控制方便，自动化程度高，达到了设计的目的，实现了对于整个发酵
3、系统实时的监控，将这一技术应用到实际生产当中，能够为微生物发酵行业带来良好的经济效益和环保效益。关键词：PLC 自动加药 WinCC PID 控制 微生物发酵Automatic control system design of biological fermentation processAbstractAutomatic dosing equipment in microbial fermentation industry gets a lot of applications, the device control loop is a single, low degree of automa
4、tion. 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 microorganism fermentation, and the system configuration PC real-time monitoring, data reco
5、rd, fault alarm.This paper introduces the biological fermentation control technology in todays 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 auto
6、matic dosing control system. This paper studies the microorganism 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, acc
7、ess to the ph, temperature, DO, such as liquid level as the input parameters, and these parameters of real-time 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 automatical
8、ly 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 computation of the control algorithm, PID regulation of the output signal are given
9、, 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, ea
10、sy to control, high degree of automation, achieve the goal of the design, has realized the real-time monitoring for the whole fermentation system, the applications of this technology to actual Iproduction, can bring good economic benefits for microbial fermentation industry and environmental benefit
11、s.Key words: PLC; Automatic dosing；WinCC；PID control；Microbial fermentationIII目 录摘 要 .IAbstract.II第一章 引言 .11.1 生物发酵过程自动加药技术的发展与应用 .11.1.1 生物发酵过程自动加药技术的发展背景 .11.1.2 生物发酵过程自动加药技术的现状 .31.1.3 生物发酵过程自动加药技术的应用前景 .61.2 西门子可编程控制器(PLC)的发展概况 .7第二章 生物发酵自动加药控制系统的组成及其仪表选型 .112.1 PLC 200 Smart 控制器 .112.2 西门子视窗控制中心 SIMATIC 系列面板 Smart Line.122.3 控制检测 部分 .132.3.1 控制部分 .132.3.2 检测部 分 .16第三
