基于PASCO实验平台探究热机循环实验

Exploration on Heat Engine Cycle Experiment Based on PASCO Experimental Platform

PASCO实验平台是一个将计算机数据采集与分析应用于实验中的系统.利用PASCO实验平台完成由两个等温和两个等压过程组成的热机循环实验.通过3组数据对比得到系统对外做功的数值与砝码增加的重力势能之间的误差仅为0.70%,验证了p V图像内的面积就是系统对外所做的功.实验的优势在于使用PASCO实验系统及其配套的传感器,实验者可自己参与到热机循环的过程中并能够动态地观察到p V循环图形成的过程,测得的数据点也可直接显示在计算机软件中,提高了数据处理的效率,增强了实验的操作性,提升了教学效果.

The PASCO experimental platform is a system that applies computer data acquisition and analysis to experiments.A heat engine cycle experiment consisting of two isothermal and two isobaric processes was completed with PASCO experimental platform.By comparing the data,it is found that the error between the value of work done by the system and the gravitational potential energy increased of the mass is only 0.70%,which verifies that the area in the P-V diagram is the work done by the system.The advantage of the experiment is that by using PASCO experimental system and its supporting sensor,the experimenters can participate in the process of thermal engine cycle and dynamically observe the process of P-V cycle image formation.The measured data points can also be directly displayed in the computer software,which improves the efficiency of data processing,enhances the operation of the experiment and improves the teaching effect.