The Research On Monitoring Technology Of Extraction And Concentration Process Of Chinese Medicine Based On Networks

There are still many problems restricting Chinese medicine industry’s development in China. There is still a certain gap between the present stage of Chinese medicine production technology and international production technology, extraction and concentration technology lag behind the formulation technology. In response to the fact that the state has adopted a new version of GMP, chinese medicine enterprises must improve the level of automation of the production management, so studying and designing the web-based Chinese medicine extraction monitoring system is essential.On the basis of understanding the automation field research status at home and abroad, according to the characteristics and control requirements of the Changbaishan Pharmaceutical Co., Ltd. water extraction process production line, the topic has studied a web-based Chinese medicine extraction and concentration process monitoring system.To achieve the extraction process "sub-boiling" state as the goal, studying the temperature control strategy. In the heating stage, using fuzzy predictive control algorithm, so that the heating rate changes in accordance with the determined rate, to reduce the overshoot of the system, to overcome the thermal inertia effect,to ensure that the alkylene boiling state into the insulation stage. In the insulating phase, using PID control method, the accuracy of the temperature control to within ±0.5 ℃. Combined with SCAD A software, realizing the temperature control strategy based on PLC.The topic researches communication technology and database technology. Builds a network structure of monitoring system, achieves the ethernet-based network communication technology; applys SQL database, SQL database through an ODBC data interface to connect with the host computer monitoring software, achieves the data open management.Lay the foundation for the realization of integrated automation.This topic designed PLC control systems, researched the solvent cumulative amount of calculation and control method, fuzzy and predicted temperature control strategy implementation method, preparated the corresponding program according to the Chinese medicine extraction, concentration and thermal reflow operation requires. This topic Configurated software using WinCC,developed Chinese medicine extraction the Concentration process monitoring software,achieved production process in real-time and remote monitoring, user management, alarm recording, production report storage and query functions.This system has been actual operation in the extraction workshop in the Changbaishan Pharmaceutical Co., Ltd. water, the system operation is stable; temperature control strategy is meet the requirements of Chinese medicine extraction temperature control; query monitoring platform for real-time historical and real experimental data, the man-machine interface is friendly; meet the user requirements.