基于嵌入式Linux平台的数字视觉传感器设计

发布时间：2018-04-15 17:07

本文选题：数字视觉传感器 + 嵌入式Linux　；参考：《天津大学》2016年硕士论文

【摘要】：白车身在线检测站是车身在线制造生产的检测环节,可对车身关键部位进行实时检测,故对系统的可靠运行提出了较高的要求,实现整个系统快速高效的监控管理势在必行。本文在现有的白车身在线测量系统的基础上,分析在在线测量工位应用中的优缺点,在测量速度和通讯安全方面做了进一步的改进,结合白车身在线测量控制盒系统,设计了基于嵌入式Linux系统的数字视觉传感器。本文所设计的数字视觉传感器硬件配置更高,结合视觉传感器采集传感器模块开发底层驱动,使其具有图像采集功能和实时处理功能,取代现有系统中图像采集卡,精简系统结构;在现有系统物理层和应用层的支持上,在数据链路层中设计了更加完善的通讯协议,使得数据的通讯更加高效安全。本文主要的研究工作如下:1.分析白车身在线检测系统的优势和劣势,针对现有系统结构较为复杂而导致的故障率高和通讯协议简单但没有安全保障问题,提出改进方案并进行需求分析,根据改进的在线测量系统的结构完成数字视觉传感器的总体设计。2.本文基于ARM Cortex-A8核心的S5PV210处理器搭建嵌入式Linux开发平台,结合本文系统的需求,完成系统具体的硬件层、中间层和软件层的开发环境搭建。3.在搭建完成的嵌入式系统开发平台上完成数字视觉传感器的图像采集功能,完成CMOS Camera底层驱动开发,并预留出应用接口API,方便后期的开发和改进;完成数据通讯功能,结合白车身测量控制盒系统下行RS485通信方式,基于OSI协议参考模型在系统物理层和应用层相关函数的支持下实现数据链路层的通信协议设计。4.完成数视觉字传感器的各个模块的测试,分析实验结果并总结,验证系统功能测试结果满足要求。5.根据系统已完成工作情况,对数字视觉传感器进行整体总结,分析它的优势和意义并针对工作中未解决的问题和进一步的开发工作提出改进意见和对未来工作的展望。
[Abstract]:On-line inspection station of BIW is the detection link of the on-line manufacture of automobile body, which can detect the key parts of the body in real time. Therefore, a higher requirement is put forward for the reliable operation of the system, and it is imperative to realize the rapid and efficient monitoring and management of the whole system.Based on the existing on-line measurement system of BIW, this paper analyzes the advantages and disadvantages in the application of online-measuring station, and makes further improvements in measuring speed and communication security, combining with the BIW on-line measurement and control box system.A digital vision sensor based on embedded Linux system is designed.The hardware configuration of the digital vision sensor designed in this paper is higher than that of the others. The bottom driver is developed with the combination of the sensor module of the visual sensor, so that it has the function of image acquisition and real-time processing, which replaces the image acquisition card in the existing system.With the support of the existing physical and application layers, a more perfect communication protocol is designed in the data link layer to make the data communication more efficient and secure.The main research work of this paper is as follows: 1.This paper analyzes the advantages and disadvantages of the BIW on-line detection system, aiming at the high failure rate caused by the complex structure of the existing system and the simple communication protocol but no security guarantee, puts forward the improvement scheme and carries on the demand analysis.According to the structure of the improved online measurement system, the overall design of the digital vision sensor. 2. 2.This paper builds an embedded Linux development platform based on the S5PV210 processor of ARM Cortex-A8 core. Combining with the requirements of the system, the development environment of the hardware layer, middle layer and software layer of the system is built. 3.The image acquisition function of digital vision sensor is completed on the embedded system development platform, the bottom driver of CMOS Camera is developed, and the application interface is reserved, which is convenient for the later development and improvement, and the data communication function is completed.Combined with the downlink RS485 communication mode of the BIW measurement control box system, based on the OSI protocol reference model, the communication protocol design of the data link layer based on the system physical layer and the application layer correlation function is realized. 4.Complete the testing of each module of the digital visual word sensor, analyze the experimental results and summarize, verify that the system functional test results meet the requirements. 5.According to the finished work of the system, the paper summarizes the digital vision sensor as a whole, analyzes its advantages and significance, and puts forward some suggestions for improvement and prospects for the future work in view of the unsolved problems in the work and the further development work.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U468.2

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