摘要
频闪仪的工作环境给光源提出了响应速度快、亮度高、余辉短的苛刻条件,使得选择光源和设计其驱动电路变得困难,也因此限制了频闪法物理研究方法在教学中的普及.本文论证了以大功率白光LED为光源制作教学用频闪仪的可行性,使用STC89C52单片机作为中央控制器的频闪仪,实现了频率的数字化产生和控制.设计制作的频闪仪频率范围是1～100Hz,步进1Hz,频率误差小于±0.2Hz,总光通量700lm,能够满足教学和一般科研需要.
The working conditions of stroboscope required a light source of fast response, mgn brightness and short afterglow, which made the design of the light source and the driving circuit very difficult and limited its application of in teaching. In this paper, the feasibility of stroboscope with the high-power white LED light source in teaching was discussed, and the STC89C52 microprocessor was used as the central control unit to realize the digital frequency generation and control. The conclusion was that the stroboscopic frequency range was 1--100 Hz with 1 Hz increment, the error of the fre quency was ±0.2 Hz and the total luminous flux was 700 lm, which could meet the needs of teaching and research.
出处
《物理实验》
2012年第8期15-18,共4页
Physics Experimentation
基金
首都师范大学2012年工科基地项目
2011年实验室开放基金项目(No.G110101)
关键词
白光LED
MCS-51单片机
频闪照相
white LED MCS-51 single-chip microprocessor stroboscopic photography
