生物发酵过程自动加药控制系统设计设计.docVIP

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，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的计算后输出的调节信号，控制随之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。PLC 自动加药 WinCC PID控制 微生物发酵  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 microorganism fermentation, and the system configuration PC real-time monitoring, data record, 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 automatic 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, access 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 automatically calculate the peristaltic pump running duty r