温度自动测量控制器及其在金属材料线胀系数测定中的应用

AN AUTOMATIC INSTRUMENT OF TEMPRATURE MEASUREMENT AND CONTROL

本工作设计和制作的温度自动测量控制器利用半导体三极管作温度传感器，集成运算放大器作测量放大和控制器件，可用于常温温度测量与控制，具有结构简单，测量快速、准确、可靠，成本低廉等特点。本仪器可广泛应用于大中学物理、化学等有关实验。作为例子，本文介绍其在大学物理实验中对金属材料线胀系数的测量之应用。

We have designed an automatic instrument of temperature measurement and control.In this instrument,a semconductor triede is use.d as the temperature sensor,while an ingegrated circuit operational amplifier as the mesurement and control divice.This instrument is simple in structure,accurate,quick,and reliable in measurement,and low in price.It would be applicable to rnany related physical and chemical exporiments in Colleges and Schools. An application is presented in this paper as an example for the measurements of the linear expansion coefficient of metal,which is a standard experiment in College physics education.