Microbial fermentation microcomputer distribution control system

In the fermentation industry such as antibiotics, enzymepreparations, MSG brewing, microbial fermentation process is a very important production link, fermentation directly affects the quantity, quality and production costs of productsThe computer distribution control system not only realizes the online real quantity detection, recording, graphic display, automatic storage of historical data, report printing and automatic control of environmental parameters of fermentation process parameters, but also lays a good foundation for the optimization and control of fermentation industrymost people use computer control technology for automatic control of the fermentation process, its structure is basically the use of industrial control machine or PC machine for the upper computer, the next computer is using STD bus or microcontroller, the system is complex and the cost is highCan use the upper and lower machine way to build the system, the next machine using PLC, the upper computer using ordinary PCThe two communicate through serial ports to realize the acquisition and transmission of datafirst of all, The use of PLC as the next-bit machine, and designed to automatically select offline (off the upper computer) or the two operating modes, because plc is reliable, once the upper computer problems, will not affect the normal operation of the next bit machine, in addition, the communication between the upper and lower machine seispense with a dedicated isolation cable, which can well avoid the impact of the field signal on the computer to protect the computer, PLC itself has the internal and field signal isolation design, so it is difficult to connect the fieldAccording to the need for online monitoring of fermentation process and analysis and management of real-time information, the system has the following functions:(1) can set and communicate functions: including control parameter setting, indirect parameter calculation and offline parameter input, etc.;(2) detection and control functions: online measurement of the main variables and biomass in the fermentation tank (e.gstirring speed, culture temperature, fermentation liquid pH, dissolved oxygen concentration, etc.) on-line, on-line calculation of indirect parameters such as bacterial concentration, product concentration and matrix concentration, in order to understand the physiological, biochemical characteristics of the culture object in the fermentation process, grasp its growth trend, and provide the basis for optimizing the process control and amplification process(3) screen display function: various real-time parameters, charts, fermentation process dynamic refresh with real-time fermentation process status monitoring flow chart display, to guide the operation(4) operation management functions: select a variety of operating functions, including setting limits, setting important control parameters for the lower computer, sampling time setting, display or printing process data, etcthrough the graphical operating interface and multi-layer menu(5) Information Storage and Reporting and Curve Printing Functions: Recording and saving state and data during operation is an important task in the online monitoring of the fermentation processMeet the requirements of various analytical statistics with accurate records, as well as operational guidance for future monitoringA general implementation of record saving is to obtain preselected data sets at intervals and save them in a database file