压力传感器测量气体等温和绝热过程实验研究

Experimental study of gas isothermal and adiabatic process measured by pressure sensors

用气体压力传感器、放大器、数字电压表和数字示波器，自制一台数字式气压计，用于分别测量容器中空气的等温膨胀和绝热膨胀时气体压强与体积的关系，验证玻意耳定律和绝热过程的泊松公式，准确求得气体比热容比，实验误差一般小于3％。该实验可以在高等学校基础物理实验中推广。

A digital barometer was made by the gas pressure sensor, amplifier, digital voltmeter and digital oscilloscope, for measuring the relationship of gas pressure and volume during isothermal expansion and adiabatic expansion of air in the container separately. The Boyle law and Poisson equation of adiabatic process were identified, and the gas specific heat ratio γ was obtained accurately. The experiment error was less than 3%.