引言在自动控制领域里,微处理器的出现引起了一场技术革命,由于它具有体积小、价格低、功能强及使用灵活方便等特点,通过它能容易地把计算机技术应用于各种控制装置中,使它们具有某种智能,变得灵巧多用,从而不断地推出了新一代的控制仪表。在建材行业及其它工业,有着多种多样的工业对象,有些对象的工作环境较恶劣,对象 Introduction In the field of automatic control, the advent of microprocessors has given rise to a technological revolution that has made it easy to apply computer technology to various controls due to its small size, low price, high functionality and ease of use Device, so that they have some intelligence, become more versatile and smart, so as to continue to introduce a new generation of control instruments. In the building materials industry and other industries, has a wide range of industrial objects, some of the objects of the working environment is harsh, the object