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一,引言 A/D转换技术和数字电压表产品的发展为温度的数字测量提供了条件,这无疑对材料高低温试验实现数字化带来好处。对温度进行数字测量的方法,有如图1所示的三种[1]:(1)模拟线性补偿法;(2)非线性A/D转换法;(3)数字线性A/D转换法。如果传感元件是一支热电偶,则采用
I. INTRODUCTION The development of A / D conversion technology and digital voltmeter products provide the conditions for the digital measurement of temperature. This undoubtedly brings benefits to digitization of high and low temperature test of materials. There are three kinds of methods [1]: (1) analog linear compensation method; (2) nonlinear A / D conversion method; and (3) digital linear A / D conversion method. If the sensing element is a thermocouple, then use