基于嵌入式系统的激光位移检测技术研究

发布时间：2019-02-15 12:55

【摘要】：激光位移检测技术因其测量精度高、速度快、非接触等特点,在光电检测中是一门具有重要价值的科学。目前,国内外光电检测设备向着小型化、智能化、运算速度更快、测量精度更高的方向发展,这就为测量技术的硬件平台提出了新的挑战。随着电子技术的发展,嵌入式系统进入了人们的视线,这些设备不像通用计算机那样具有庞大的体积,它们非常小,而且在计算方面也不逊色通用计算机,同时又有着出色的人机交互功能,顺理成章的成为了当前电子产业发展的新趋势。本文正是基于这种背景之下来研究在嵌入式系统中的激光位移检测技术,在文中将使用ARM9核的S3C2440A处理器作为所要开发的硬件平台的核心,在此基础上增加其他所需硬件外围设备,同时使用嵌入式Linux系统去管理整个设备。在激光位移检测系统中常用到的位置敏感器件(Position Sensitive Detector,PSD,PSD)的非线性误差一直阻碍着检测系统的整体精度,在文中,除了使用硬件电路去减小PSD的误差以外,在嵌入式系统中运行PSD非线性修正算法对数据进行修正,最终得出测量V结果,这样便极大的提高了整个激光位移检测的精度。本文主要从底层硬件的设计、移植、到上层软件系统的开发等方面对激光位移检测技术做了详细的分析。
[Abstract]:Because of its high accuracy, high speed, non-contact and so on, laser displacement detection technology is an important science in photoelectric detection. At present, optoelectronic detection equipments at home and abroad are developing towards miniaturization, intelligentization, faster operation speed and higher measurement precision, which presents a new challenge for the hardware platform of measurement technology. With the development of electronic technology, embedded systems have entered the sight of people. These devices are not as large as general purpose computers, they are very small, and they are not inferior to common purpose computers in computing. At the same time, it has excellent man-machine interaction function, and it has become a new trend of the development of the current electronic industry. This paper is based on this background to study the laser displacement detection technology in embedded systems. In this paper, the S3C2440A processor with ARM9 core is used as the core of the hardware platform to be developed. On this basis, other hardware peripherals are added, and the embedded Linux system is used to manage the whole device. The nonlinear error of the position sensitive device (Position Sensitive Detector,PSD,PSD), which is often used in the laser displacement detection system, has been hindering the overall accuracy of the detection system. In this paper, in addition to using the hardware circuit to reduce the error of the PSD, In the embedded system, the PSD nonlinear correction algorithm is used to correct the data, and finally the V measurement result is obtained, which greatly improves the accuracy of the whole laser displacement detection. In this paper, the laser displacement detection technology is analyzed in detail from the bottom hardware design, transplantation, to the development of the upper software system.
【学位授予单位】：长春理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TP368.1;TN247

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