冰的熔解热测量装置的改进

IMPROVEMENT ON MEASURING DEVICE FOR THE FUSION HEAT OF ICE

混合量热法测量冰的熔解热是大学物理中一个经典实验。使用传统测量装置易出现温度记录不准确,搅拌不均匀,散热修正不精确,实验耗时长等问题。本文应用STM32单片机、DS18B20传感器、TFT液晶屏改进冰的熔解热测量装置,实现了温度和时间的自动记录,采用辛普森公式精确计算了散热补偿面积。运用现代电子技术更新冰的熔解热测量装置,克服了传统实验方法中通过人工反复对时间、温度进行测量记录的重复性工作,有助于学生在课堂上增加实验次数,提高实验效率,并有更多的时间和精力关注更有物理意义的内容,同时提高实验结果精度。该装置易于制作,便于推广应用。装置的制作过程也是对学生实践能力的培养和锻炼过程。

The measurement on fusion heat of ice by combination method is a classical experiment in university physics. There are some shortages in the measuring devices used in traditional teaching, such as inaccurate recording, uneven stirring, inaccurate calculation of heat dissipation correction, long time consuming, and so on. The application of STM32 SCM, DS18 B20 sensor, TFT LCD screen is used to improve the measurement device for the fusion heat of ice. In this way, time and temperature can be recorded automatically, and the heat dissipation compensation area is calculated accurately by Simpson formula. Using modern electronic technology to update the melting heat measuring device of ice can overcome the repetitive work of recording time and temperature manually in the traditional experimental method, which is helpful for students to increase the number of experiments in class, improve the efficiency of experiments, and have more time and energy to pay attention to content with more physical significance. At the same time, the accuracy of experimental results can be improved. The device is easy to manufacture and popularize. The manufacturing process of the device is also the process of training and exercising students’ practical ability.