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本文对测温用热敏电阻线性化过去常用的方法:分压电路法、电桥电路法、模拟计算机技术法和频率法的原理、电路及优缺点作一般性的介绍。重点介绍采用微处理机技术实现热敏电阻线性化方法的原理及特点,并对用于线性化的F/D变换器的控制逻辑电路作了比较详细介绍,给出了实用的电路原理图,以利于使用该方法。文章最后对各种线性化方法进行了小结,认为在宽的测温范围内,实现热敏电阻线性化的最简单和最有效的方法是采用微处理机技术。
In this paper, thermistor thermometry used in the past commonly used methods: voltage divider circuit, bridge circuit method, analog computer technology and frequency method of the principle, circuit and advantages and disadvantages for a general introduction. The principles and characteristics of the thermistor linearization method using microprocessor technology are introduced emphatically. The control logic of F / D converter used in linearization is introduced in detail. The practical circuit schematics, To facilitate the use of the method. The article concludes with a summary of the various linearization methods and concludes that the simplest and most effective way to achieve thermistor linearization over a wide temperature range is through the use of microprocessor technology.