智能净水器控制系统设计.docVIP

摘要 本文设计一种自动净水的控制系统，提供温度控制、开关量输出、数据保存、水位检测等关键部件的设计思路及方案，给出了相应的硬件电路和软件流程，实现机器的自动运行。This article designed an automatic water purification machine control system, temperature control, switch output, data storage, water detection and so on key parts of the design ideas and solutions, gives the corresponding hardware circuit and software process, the implementation of the machine to run automatically. Temperature control adopted PID control, which is a very good solution to the temperature control system, which has the characteristics of nonlinear, pure time-delay, large inertia. The system realized the temperature set point set up and control of the temperature rise and fall, and use the LCD display shows the temperature control process, in addition the system takes red and green light-emitting diodes (leds) as the temperature alarm. The system takes the use of two sets of switch control ast the simulation of Water level monitoring, and a buzzer as the alarm of water level monitoring. Through the test, which has proved that the system is stable and reliable. Key words: automatic purifier; Temperature control;Water level monitoring；PID control 目录 摘要…….……………………………………………………………….Ⅰ ABSTRACT……………………………………………………………Ⅱ 第一章 绪论……………………………………………………………..1 1.1 意义….…………………………………………………………1 1.2 国内外现状及水平…………………………………………….1 第二章 硬件设计………………………………………………………..4 2.1 设计方案图…………………………………………………….4 2.2 AT89C51芯片介绍……………………………………………...5 2.3 温度控制部分………………………………………………….9 2.4 水位监测部分………………………………………………...14 第三章 软件设计………………………………………………………16 3.1 主函数程序设计……………………………………………...16 3.2 温度控制程序设计…………………………………………...18 3.3 键盘扫描程序设计…………………………………………...22 第四章 系统测试………………………………………………………25 4.1 温度控制测试………………………………………………...25 4.2 水位监测测试………………………………………………...30 总结……………………………………………………………………..31 参考文献………………………………………………………………..32 致谢……………………………………………………………………..33 第一章 绪论 1.1 意义 水是人类生命的源泉，人们对饮用水质的要求及相应的标准在不断提高。人类经历了由最初的简单的沉淀净水到传统的煮沸处理，发展到现在的深度净化饮用水。在发达国家饮用水净化处理工艺已经很成熟且净水机的使用也相当普及，但在我国，这种净水机目前仍不为大众消费者所熟悉。所以设计功能完善、经济实用的智能净水机具有积极的社会意义。 图2.1 系统