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用于实时控制的单片机,一旦受到外境干扰瞬时出现较小的错误,也会造成不可想象的后果。尤其是用干水泥、印染、造纸和野外作业等一些环境十分恶劣的生产过程控制时,就更需要把单片机或微型控制器保护起来。对于单片机系统,过高的工作温度将导致工作的不稳定,出现间歇性的软错误,使信息丢失或出错,即出现所谓“热消除”效应。同时系统温度大幅变化会导致元件的接触不良,降低系统的抗震能力。造成系统的工作不正常。一般认为将单片机安装在15～28℃环境温度中最合适。采用电子制冷、加热技术使微控制器在高、低温变化的场合能正常工作,再用良好的铁盒屏蔽密封方式,可保证单片机壳免受大湿度气体的腐蚀。可满足许多工业控制现场的要求,并防止一些电磁干扰幅射
Microcontroller used for real-time control, once the external environment interference instantaneous smaller errors, can also cause unimaginable consequences. Especially with dry cement, printing and dyeing, papermaking and field operations and some very harsh environment of the production process control, even more need to protect the microcontroller or microcontroller together. For a single-chip microcomputer system, high operating temperature will lead to job instability, intermittent soft error, so that information is lost or wrong, that is, the so-called “heat elimination” effect. At the same time, the system temperature changes will lead to poor contact of components, reducing the system’s seismic capacity. Cause the system is not working properly. Generally believed that the microcontroller installed in the 15 ~ 28 ℃ ambient temperature is the most suitable. The use of electronic cooling, heating technology to micro-controller in the high and low temperature changes in the occasion to work properly, and then use a good iron box shielding seal to ensure that the single-chip case from large humidity gas corrosion. It meets the requirements of many industrial control sites and prevents some electromagnetic interference radiation