基于模糊PID控制的六安瓜片远红外烘焙机设计

The Design of Liuan Guapian Tea far infrared Baking Machine Based on Fuzzy PID Controler

根据六安瓜片烘焙工艺的要求,设计了用于拉火工序的远红外烘焙机。茶叶采用不锈钢输送带输送,整机采用3层结构,每层输送带由独立的变频电机驱动,输送带上方布置有陶瓷红外线辐射器,通过红外线温度传感器采集叶温,并研制了基于模糊控制的PID温度控制器来控制温度。试验表明:远红外烘焙机碎茶率为5%(人工烘焙碎茶率为15%),叶温为80°C,人工审评结果认为其成茶品质优于炭火烘焙。

A far infrared machine was designed that can bake LiuAn GuaPian tea.The tea was transported by three stainless steel conveyer belts,every conveyer belt was driven by its own Variable-frequency motor,infrared radiation elements were installed over the conveyer belt,the leaf baking temperature was collected by Infrared temperature sensor,controlled by fuzzy PID temperature controller.The experiment result showed that： setting leaf temperature at 80°C,the quality of the infrared baking tea was achieving or above the charcoal baking.Percentage 0f broken tea was 15% by manual charcoal baking,and it was 5% by this machine.The tea sensory tests showed that the quantity of far-infrared Baking was better than that by charcoal baking.