摘要
简要阐述光电位置敏感器件的特点、工作原理,根据光电位置敏感器件的原理和光电位置方程,分析了背景光与测量精度的关系.在此基础上,采用分布图像的峰值检波器来模拟预处理光电信号,通过数字转换得到图像的重心位置;采用集中平行的模拟计算估算射到感光区的光分布的重心,并通过时钟比较器得到数字化图像.给出了检测位置的二维光传感器阵列、显示与图像数量的平方根成正比功耗关系式以及几个重要结论.
In this paper, principle and characteristics of the position sensitive detector（PSD） are introduced. The relation of backfround light and the surveying precision are analyzed on the basis the principle and the equation of PSD. The photo-generated signal is analog preprocessed using a distributed image peak detector and the image centroid position is determined by means of contour digitization. The sensor implements an analog intensive parallel computation for the estimation of the controid on the photosensitive area. The digitized images are obtained by comparing the voltage on each bit-line with the normalized threshold using a clocked comparator. We propose a novel architecture of 2D digital PSD for position measurement and conclude that the power consumption is proportional to the square root of the number of pixels.
出处
《山东理工大学学报（自然科学版）》
CAS
2006年第3期40-43,共4页
Journal of Shandong University of Technology:Natural Science Edition
基金
山东省教育厅资助项目(J05C51)
山东理工大学科研基金资助项目(2004KJM13)
