1、 II 摘要摘要 我国粮食消费需求将呈刚性增长，而耕地减少、水资源短缺、气候变化等 对粮食生产的约束日益突出。中国是粮食生产与消费的大国，如何能更有效的存 储粮食，控制温度是问题的关键，烘干塔的烘干过程是粮食生产中的关键环节。 本系统通过传感器对温度进行检测，通过信号调理送入单片机，单片机通过算法 对信息进行运算处理，送出显示。本系统测温灵敏，反应迅速，系统稳定性高。 通过键盘扩展可以选通四点检测当中的任意一点送入显示，方便准确。在系统设 计时，要求单片机上电能可靠复位，防止程序跑飞导致系统死机。另外增加看门 狗系统，使单片机正常工作。 关键词关键词 粮食烘干 过程控制 温度传感器 III A
2、bstract Commissary consumer demand rises quicklyHowever, irrational development of the land, arable land is decreasing and water resources short seriously and climate changing which is controlled outstanding day by day. China is a major grain producer as well as a major grain consumer.How to store g
3、rain effectively and control temperature is the key .The way to solve the problem is the process of driers .The system measures temperature with sensor.Through signal adjust for sending to single-chip Microcomputer which deal with arithmetic to display by a processer.The system uses assembler langua
4、ge to approach reaction of hardware quickly.It is more stable for system4 .Each of 4points examines sends to display through key expander for accuracy and convenient.During designing this system, Electric energy is requested for ability to reset through microcomputer. Prevent program fleet in case of computer crashed. In addition，Raise a watchdog to make microcomputer work normally. Keywords grain dry；course control ；temperature sensor I 目目 录录 第一章第一章 绪绪 论论 1 1 1.11.1本论文背景及研究意义本论文背景及研究意义
