基于模糊专家控制的茶叶炒制温度控制系统

Tea frying temperature control system based on fuzzy expert control

茶叶炒制温度对茶叶品质有很大的影响,针对现有炒茶机温控系统存在温度控制精度低、调节时间长等缺点,研发适用于高端名优茶炒制的温度智能控制系统。该系统以单片机AT89S52为核心,采用铂热电阻作为温度传感器,通过电流变送器XTR106对不平衡电桥输出信号进行线性化处理,并结合模糊控制理论和专家系统设计了一种模糊专家控制器。对所设计的温度控制系统测试结果表明,在0-300℃范围内系统具有较好的动静态性能,静态误差小于±1℃,超调量小于2.36%,过渡过程时间小于27s,能很好地满足高端名优茶炒制对温度控制的要求。

Tea frying temperature has a great influence on the quality of tea.To cope with the disadvantages of the existing tea-leaf parcher temperature control system with temperature control of low precision and the longtime adjusting, the tea-leaf parcher with intelligent temperature control system we designed, which is suitable for frying high-end quality famous tea. System used AT89S52 single chip as the core, the platinum thermal thermistor as the temperature sensor and linearized the output signal of unbalanced bridge by means of current transmitter XTR106 and designed a kind of fuzzy expert controller combine with the fuzzy control theory and expert system. The de- signed temperature control system has been tested and the result shows that the system which has better static and dynamic performances, whose static error of measuring temperature is less than ±1℃, whose overshoot is less than 2.36%, and whose transition time is less than 27 s in the range of 0-300 ℃can meet the requirements of temperature control to fry high-end quality famous tea.