新型固体热膨胀系数测量仪的设计与研发

doi:10.14139/j.cnki.cn22-1228.2022.02.015

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摘要

设计了一种以杠杆放大为手段测量固体的热膨胀系数的装置，通过对金属棒加热推动杠杆，将杠杆的另一端固定超声波位移传感器，利用杠杆能将金属棒微小的伸长量显著放大的原理将金属棒的微小伸长量放大，来测量金属棒的微小伸长量。数据采集通过 Arduino 的编程来实现，将温度和放大后的位移量实时显示，基于此仪器可以研究固体的热膨胀性质以及测量固体热膨胀系数。实验现象明显，测量结果准确，将该仪器应用到大学物理实验教学中，可以加深学生对固体热膨胀性质的理解，培养学生的创新实践研究能力。

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	李垚垚
	汪兵
	孙丽媛
	周永军

关键词: 热膨胀系数微小量放大实验教学

Abstract:

A device for measuring the thermal expansion coefficient of solid by means of lever amplification is designed.The metal rod is heated to push the lever,and the ultrasonic displacement sensor is fixed at the other end of the lever.Based on the principle that the lever can significantly amplify the small elongation of the metal rod ,the small elongation of the metal rod is amplified to measure the small elongation of the metal rod.The data collection is programmed by Arduino to display the temperature and the amplified displacement in real time. Based on this instrument,the thermal expansion properties of solids can be studied and the thermal expansion coefficient of solids can be measured.The results show that the experimental phenomenon is obvious and the measurement results are accurate.The application of the instrument in physics experiment teaching can deepen students’understanding of the properties of solid thermal expansion and cultivate students ’ ability of innovative practice research.

Key words: thermal expansion coefficient small amount of amplification the experimental teaching

出版日期: 2022-04-25 发布日期: 2022-04-25 整期出版日期: 2022-04-25

ZTFLH:

G 484

引用本文:

李垚垚 , 汪兵 , 孙丽媛 , 周永军. 新型固体热膨胀系数测量仪的设计与研发 [J]. 大学物理实验, 2022, 35(2): 69-72.
LI Yaoyao , WANG Bing , SUN Liyuan , ZHOU Yongjun. Design and Development of a New Solid Thermal Expansion Coefficient Measuring Instrument . Physical Experiment of College, 2022, 35(2): 69-72.

链接本文:

http://dawushiyan.jlict.edu.cn/CN/10.14139/j.cnki.cn22-1228.2022.02.015 或 http://dawushiyan.jlict.edu.cn/CN/Y2022/V35/I2/69

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