《光电传感与检测》课程教学的改革与实践

对<光电传感与检测>课程的教学内容和教学方法中存在的问题进行了分析,通过制定新教学大纲、编著新教材、设计基于项目设计的实验内容、引入讨论原理性方案式教学和基于项目设计的实验教学方法,使课程教学贴近产业发展并反映当代光电高新技术的实际应用.实践证明:该方法既可激发技术应用型专业学生的学习兴趣,又可增强他们分析和解决工程实际问题的能力.     

Non-piece-wise error compensation for grating displacement measurement system with absolute zero mark

A method for compensating the measuring error of the grating displacement measurement system with absolute zero mark is presented. It divides the full scale range into piece-wise subsections and compares the maximum variation of the measuring errors of two adjacent subsections with the threshold. Whether the specified subsection is divided into smaller subsections is determined by the comparison result. After different compensation parameters and weighted average values of the random errors are obtained, the error compensation algorithm is implemented in the left and right subsections, and the whole measuring error of the grating displacement measurement system is reduced by about 73%. Experimental results show that the method may not only effectively compensate the spike error but also greatly improve the precision of the measuring system.