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对于金属热胀冷缩规律的研究,在机械制造设计以及工程建筑等各个领域都十分重要。因此,为了满足线膨胀系数物理实验的需要,设计了一套以Cygnal公司的SoC单片机C8051F320作为主控制芯片,采用AT89C51单片机作为可控硅触发板的控制芯片的数字化线膨胀系数理实验平台,该平台可以进行温度、伸长量的采集,同时产生控制信号,触发可控硅导通,控制电阻炉加热升温。该平台具有功能完善的液晶操作界面,能够独立完成线膨胀系数测试的全过程,同时配有微型打印机,物理实验的中间数据和实验结果可以如实打印输出。该实验平台能够真实客观地反映学生物理实验工作的完成情况,易于操作,通用性强。
Research on the law of metal thermal expansion and contraction is very important in various fields such as mechanical manufacturing design and engineering construction. Therefore, in order to meet the need of physical experiment of linear expansion coefficient, a digital linear expansion coefficient experiment platform designed by Cygnal SoC MCU C8051F320 as main control chip and AT89C51 single-chip microcomputer as SCR control chip was designed. Platform temperature and elongation can be collected, and control signals generated at the same time, trigger SCR conduction, control resistance furnace heating temperature. The platform has a fully functional LCD interface that can independently complete the entire process of linear expansion coefficient test, with a micro-printer, the intermediate data of the physical experiment and the experimental results can be faithfully printed output. The experimental platform can truly and objectively reflect the completion of students’ physics experiments, which is easy to operate and versatile.