基于红外检测的高精度定时装置的研究

本文介绍了基于红外对射管的高精度定时装置,给出了多路光电检测电路、PCA模块电路、CPU控制电路、数据通信电路以及键盘显示电路的设计.实测表明,该定时装置与传统的手持秒表等相比具有精度高、多通道测量以及带RS232、USB通信接口等优点,不仅满足了大学力学实验的测试要求,同时也为实际的自由落体运动和最速降线的理论研究及应用提供了准确的数据来源.

Research on High Precision Timing Equipment Based on Infrared Detector

In this paper,a high precision timing equipment based on infrared beam detectors is presented and the design of a multiple channel photoelectric cell circuit,a PCA circuit,a CPU control master circuit, a data communication circuit and a keyboard and display circuit is given.The practical test result shows that this timing equipment has the advantages of high precision,multiple channel measurement and additional RS232 and USB communication interfaces compared with the traditional manual stopwatch. It not only can meet the- accuracy requirement of mechanics experiment at universities,but also can provide exact data sources for the theory study and application of brachistochrone and free falling.