基于Profibus-DP现场总线的多功能色谱分离装置控制系统设计

Design of Control System of Multifunctional Chromatographic Separation Device Based on Profibus-DP Field Bus

为了实现多功能色谱分离装置的精准化控制,加速模拟移动床色谱纯化分离速度,设计基于Profibus-DP现场总线的多功能色谱分离装置控制系统;以STM32F103微处理器作为底层控制设备,连接Profibus-DP协议芯片、VPC3与RS-485接口电路,转化从站地址电路与设定应用模块,利用模拟移动床控制回路,完成Profibus-DP现场总线的硬件电路设计;建立梯度SMB色谱,采用异步切换方式,控制变浓度进料的实际操作行为,分离处理模拟移动床多功能色谱,结合多功能色谱分离装置的控制原理,运用气相色谱法,分析色谱分离过程中的基质效应形式,实现多功能色谱分离装置控制系统软件设计;实验结果表明,基于Profibus-DP现场总线控制系统的模拟移动床色谱纯化分离速度较快,能够有效满足多功能色谱分离装置精准化控制的操作需求。

In order to realize the precise control of the multi-functional chromatographic separation device and accelerate the purification and separation speed of simulated moving bed chromatography,a multi-functional chromatographic separation device control system based on Profibus-DP fieldbus was designed.Taking STM32F103 microprocessor as the bottom control equipment,connecting Profibus-DP protocol chip,vpc3 and RS-485 interface circuit,converting slave station address circuit and setting application module,using analog mobile bed control circuit,the hardware circuit design of Profibus-DP field bus is completed.The gradient SMB chromatography was established.The asynchronous switching mode was adopted to control the actual operation behavior of variable concentration feed.The separation and processing simulated the moving bed multi-functional chromatography.Combined with the control principle of the multi-functional chromatographic separation device,the matrix effect form in the chromatographic separation process was analyzed by using gas chromatography,and the control system software design of the multifunctional chromatographic separation device was realized.The experimental results show that the simulated moving bed chromatographic purification and separation speed based on Profibus-DP fieldbus control system is fast,which can effectively meet the operational requirements of precision control of multi-functional chromatographic separation device.