According to the demand of modern incubation industry, we design and implement automatic regulation and control system for the oxygen levels, temperature and humidity of incubator, using AT89C51 single — chip as the main controller, through the keyboard by default, control resistance wire heating, humidifier humidifying and complete cooling fan, drop wet etc. The actual operation shows that hatching rate increased significantly and weak young rate to decline significantly. The structure of system is simple, reliability and high control accuracy and it has certain practical value and the development prospect.%根据现代孵化行业的需求,设计并实现了对孵化器温湿度、含氧量的自动调节与控制,使用AT89C51单片机作为主控器,通过键盘预设,控制电阻丝加热、加湿器加湿以及风机完成降温、降湿等功能；实际运行结果表明出雏率明显提高,弱雏率明显下降；系统结构简单、可靠性和控制精度较高,具有一定的实用价值和发展前景.
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