基于惠斯通电桥探究热敏电阻与温度之间的关系  

Explore the Relationship Between Thermistor Resistance and Temperature Based on Wheatstone Bridge

作　　者：王江新 杨丽 姜建刚[1] 冯秀绒[1] 解迎革[1] 王鹤 WANG Jiangxin;YANG Li;JIANG Jiangang;FENG Xiurong;XIE Yingge;WANG He(College of Science;College of Animal Science and technology,Northwest A&F University,Xianyang 712000,China)

机构地区：[1]西北农林科技大学理学院,陕西咸阳712000 [2]西北农林科技大学动物科技学院,陕西咸阳712000

出　　处：《大学物理实验》2023年第6期45-48,共4页Physical Experiment of College

基　　金：国家自然科学基金青年科学基金项目(12004312);陕西省教育科学规划课题(SGH20Y1032,SGH21Q006,SGH21Y0028)。

摘　　要：大学物理实验课覆盖范围广,具有严谨的理论基础和科学的实验方法,是培养学生科学思维、提高科学素养的重要手段。但是,目前大学物理实验存在创新性不足,与生活结合性不强等问题。本次实验以热敏电阻替代定值电阻作为研究对象,以惠斯通电桥作为载体,研究NTC型热敏电阻在不同温度下电阻值与温度之间的关系。通过拟合温度与电阻值之间的变量关系,得到电阻值(R_(T))随温度(T)变化的函数关系,进而可以得出在任意温度的电阻值。基于热敏电阻在日常生活中随处可见,提高学生的学习兴趣,从而进一步提高基础物理实验的拓展性,提高学生的动手能力和创新能力。College physics experimental projects cover a wide range,which based on rigorous theory and experimental means.This course provides students with basic experimental skills training,which is an important means to cultivate students' scientific thinking and improve their scientific literacy.However,there are some problems such as lack of innovation and lack of integration with life in university physics experiment course.In this experiment,thermistor is used to replace the fixed value resistance as the research object,and Wheatstone bridge is used as the carrier to study the relationship between the resistance value and temperature of NTC type thermistor at different temperatures.By fitting the variable relation between temperature and resistance value,the function relation of resistance value changing with temperature is obtained.And then,the resistance value at any temperature can be obtained.Since thermistors can be seen everywhere in daily life,students' interest in learning can be enhanced.This operation can improve the expansion of basic physics experiment,and improve students' practical ability and innovation ability.So students can understand the resistance temperature characteristics of negative temperature thermistor while mastering the working principle of Wheatstone bridge.

关 键 词：大学物理实验 惠斯通电桥 热敏电阻 

分 类 号：O4-33[理学—物理]