论文部分内容阅读
数字温度计是测温仪器类型的其中之一。本文介绍的数字温度计是采用温度敏感元件(热敏电阻),将温度的变化转换成电压的变化,由于温度变化和电信号的变化有一定的函数关系,再利用A/D转换电路将电压信号转换为数字信号,将这个数字信号和温度联系起来,成为可以显示出来的温度数值,最后通过数码管显示模块显示出来。本装置主要包括信号采集模块、信号转换模块、A/D转换与处理模块、计数与显示模块四部分,其中在信号采集模块设计时,利用matlab软件的cftool工具,进行温度与热敏电阻阻值公式的拟合,确定相关参数。
Digital thermometers are one of the types of thermometers. This article describes the digital thermometer is the use of temperature-sensitive components (thermistor), the temperature changes into voltage changes, due to temperature changes and changes in electrical signals have a certain relationship, and then use the A / D converter circuit voltage signal Converted to digital signals, the digital signal and the temperature linked to become the temperature value can be displayed, and finally displayed by the digital tube display module. The device mainly includes signal acquisition module, signal conversion module, A / D conversion and processing module, counting and display module four parts, of which signal acquisition module design, the use of matlab software cftool tools for temperature and thermistor resistance Fitting formula to determine the relevant parameters.