摘要：人参烘干过程中最重要的问题是控制的温度变化。国家为每年为人参烘干支付很高的费用，主要是因为监测设备成本较高，管理方式不够先进。在理论研究和实地考察实验的基础上，进行了人参烘干温度实时在控制系统的设计和研制。温度控制对人参烘干的效果有着重要的意义。探讨控制人参烘干过程的原理和方法，能够基本消灭人参烘干失败事故，同时节省大量人力和物力，提高烘干人参效率，使人参烘干得到安全可靠的保障。目前，国内的人参烘干过程基本上是人工检测,劳动强度大，由于检测报警不及时，造成人参浪费的现象时有发生。于是,设计并研制性能价格比较高的人参烘干过程温度控制系统迫在眉睫。由于人参烘干基地分布广、储量大，人参库的管理和监测难度大，利用微机控制系统完成人参烘干过程的温度自动控制。主要通过控制调节阀的开度来改变流入蒸气的多少，从而改变温度达到控制的要求。
System Designing of Granary Multipoint Temperature Intelligent Measurement
Abstract： Barn management of the most important issue is monitoring the grain heap temperature and humidity changes. countries for grain storage to pay high fees each year, mainly due to high cost of monitoring equipment, management methods were not advanced enough in the theoretical study and field visits on the basis of experiments carried out a food storage temperature and humidity, real-time monitoring and control system circuit design and development. The temperature and humidity changes as well as food storage temperature and humidity range allowed explore on-line measurement, calculation and control of food storage temperature and humidity, the principles and methods, and basic elimination of food mildew accident, but also save a lot of manpower and material resources, thereby reducing the intensity of granary management work to improve the efficiency of management of the granary, so that food management has been a safe and reliable protection. At present, the grain depots in the temperature and humidity testing is basically a manual inspection, labor-intensive, cumbersome, due to not timely detection and alarm, resulting in the loss of library storage of food phenomena have occurred, so the design and development of the higher cost performance granary temperature and humidity automatic detection systems is urgent. Configured by each granary-bit machines will pay under the circumstances the number of data via wireless transmission module sends to the host computer, host computer the next bit plane data in the form of curves and tables that come out, clear and intuitive display of temperature and humidity conditions within the warehouse by the host computer to the granary to monitor, manage personnel in the control room can be real-time intelligence data to see food on the food situation analysis of the data to achieve granary management automation, intelligent.
Keywords：Granary, Temperature measurement, System designing
目录
2.3.4输出通道方案选择：…………………………….. 12
3.1.单片机部分………………………………………….. 14
3.1.2 单片机的引脚介绍………………………………. 14
3.1.2 单片机的存储结构………………………………. 16
3.1.2晶振电路及复位电路…………………………….. 18
3.2 信号检测电路设计…………………………………….. 18
3.3 调节阀控制电路………………………………………. 20
4.1 PID算法程序………………………………………… 25
5.1 Protel开发软件……………………………………… 28
5.2 程序流程图………………………………………….. 29
