Study On On-line Measurement And Intelligent Prediction Control System For Food Testing Dryer

Drying as a part of a food process must follow the fundamental requirements of food production. These concern nutritional and sensorial aspects, traceability and food safety, and also minimizing processes losses, saving energy and water, reducing risks of pollution, etc. Technological trends in drying may be summarized in different complementary directions, all of them oriented towards improvement of final quality of products.In this paper, to try to save energy of drying procedure, heat pump drying was used and to try to improve the quality of the dried product, oxygen content was deduced in a controlled atmosphere during the drying process.The paper was introduced micro-controller application on automatic control food dryer, realized communication between single chip micro-controller and computer. A control system based on Fuzzy Logic was used and Visual Basic for applications offers a powerful object-oriented programming language in order to build an appropriate graphic interface.The software of on-line measurement and intelligent prediction control of the drying process has functions of input of the initial parameters of the food, system setup, running and controlling, data inquiring, output and help, and so on. It makes use of a database to manage data measuring, displays all the mentioned parameters and their changing trend synchronously. It can trace back the history data inquired and print a report for manager.Finally, after several experiments of drying green tea, the paper shows the results of the best conditions of making green tea and its regression equation.