【摘要】 多光谱痕迹检测仪是一种用于痕迹检测的警用仪器,滤光片切换系统是实现多光谱光源的重要组成部分。为了获取多光谱光源,需要对作用于光源的两组滤光片分别进行自动切换,应用单片机AT89C51提供控制和时序信号,采用步进电机驱动芯片L298驱动两个步进电机,实现两组滤光片的精确切换。运行实验表明,滤光片切换系统工作平稳、可靠。更多还原

【Abstract】 Multispectral vestige detector is a kind of device used in vestige detecting.The ray filters switching system is the most important part to make multispectral light-house.In order to get multispectral light-house,the two groups ray filters applied to the light-house must be respectively switched automatically.The microcomputer AT89C51 is applied to provide control and sequence signal,step motor driving chip L298 is adopted to drive two step motors and achieves accurate switching of two groups ray filters is achieved.Operating trial shows that the ray filters switching system works stably and reliably.更多还原