摘要
“热敏电阻温度计的设计与标定”实验,是我校理工科学生必修的设计性研究性实验。文章用几何画板软件对实验设计过程进行了优化,提高了实验设计效率,在短时间内得到所用元器件的参数大小(以t=25.0℃为例):电源E=2.009 V、Rs=5000Ω、R_(1)=R_(2)=3375Ω,这样的参数组合使热敏电阻温度计可测温25.0℃~75.0℃、微安表流过的电流和温度的线性关系达到了最优状态。同时计算出了该参数条件下,测温全区间内,热敏电阻上的功率大小,最大功率0.4348 m W,远小于上限值1 m W,说明设计是成功的。
The experiment of Design and Calibration of Thermistor Thermometer is a required design and research experiment for science and engineering students in our university.The Geometer’s Sketchpad was used to optimize the experimental design process,which improved the efficiency of experimental design and obtained the parameters of the components in a short time(t=25.0℃ as an example):Power supply E=2.009 V,Rs=5000Ω,R_(1)=R_(2)=3375Ω,such a combination of parameters make thermistor thermometer can measure the temperature 25.0℃~75.0℃,the linear relationship between the current of the micro-ammeter and temperature has reached the optimal state.At the same time,the maximum power of the thermistor is 0.4348m W,which is far less than the maximum power of 1 m W,proving that the design is successful.
作者
乐续明
原安娟
崔敏
刘立英
王丽香
张睿
常兴阳
YUE Xuming;YUAN Anjuan;CUI Min;LIU Liying;WANG Lixiang;ZHANG Rui;CHANG Xingyang(Information Science Department,Beijing University of Technology,Beijing 100124,China;Science Department,Beijing University of Technology,Beijing 100124,China)
出处
《大学物理实验》
2022年第3期119-123,共5页
Physical Experiment of College
基金
北京工业大学教育教学研究课题(ER2022SJB11)。
关键词
热敏电阻
非平衡电桥
几何画板
参数优化
thermistor
non-equilibrium electric bridge
the geometer’s sketchpad
parameter optimization
