【正文】 use the CAN bus characteristics and advantages, and describes the characteristics and development trend of photoelectric detection technology and then, in the field bus by a CAN bus research discussion, discusses the working principle of CAN bus and the CAN bus can analyze the characteristics of the hierarchical structure for the development trend of the field of photoelectric detection protocol and data frame structure this paper designs a data acquisition system of CAN bus based on acceleration, the CAN bus as the munication bus, using DSP chip TMS320F2812 as the main controller, the external cutter Dconversion chip AD977A for data acquisition and conversion, and transmits the data to the display byCAN bus. Software using CCS of TI pany development as a development environment, software design using modular design method to plete the design of each sub module, through careful analysis and design of the main program, realize the reasonable scheduling of each task, meets the system design requirements. embedded industrial puter display interface using MCGS configuration software written to realize the data processing and display the system has good universality! High reliability! Fast transmission speed, convenient operation, with good prospects of application。 貴陽(yáng)學(xué)院畢業(yè)設(shè)計(jì)（論文） III 目 錄 基于 CAN總線汽車加速度信息采集系統(tǒng)設(shè)計(jì) ................................................................................... I 摘 要 ........................................................................................................................................... I Abstract ........................................................................................................................................ II 目 錄 ..........................................................................................................................................III 第 1 章 緒論 ................................................................................................................................. 5 什么是 CAN 總線 ............................................................................................................. 5 CAN 總線的產(chǎn)生與發(fā)展 .................................................................................................... 5 CAN 總線的產(chǎn)生背景 .................................................................................................... 5 CAN 總線的發(fā)展過程 ..................................................................................................... 5 CAN 總線的特 點(diǎn) .............................................................................................................. 6 CAN 總線的優(yōu)點(diǎn) .............................................................................................................. 6 光電檢測(cè)領(lǐng)域 .................................................................................................................. 7 光電檢測(cè)的特點(diǎn) ............................................................................................................. 7 光電檢測(cè)技術(shù)的發(fā)展趨勢(shì) ............................................................................................... 8 本文的主要研究?jī)?nèi)容 ........................................................................................................ 8 第 2 章 CAN 總線技術(shù) .................................................................................................................. 9 CAN 總線介紹 .................................................................................................................. 9 CAN 總線的基本工作原理 ................................................................................................ 9 CAN 總線的特點(diǎn) .............................................................................................................. 9 CAN 協(xié)議分析 .................................................................................................................10 協(xié)議的分層結(jié)構(gòu) ....................................................................................................10 報(bào)文傳輸及其 幀結(jié)構(gòu) ..................................................................................................... 11 第 3 章 系統(tǒng)硬件電路設(shè)計(jì) ...........................................................................................................14 系統(tǒng)硬件設(shè)計(jì)整體框架 ....................................................................................................14 DSP 系統(tǒng)及外圍電路設(shè)計(jì) ................................................................................................14 TMS320F282 功能介紹 .................................................................................................14 電源模塊設(shè)計(jì) ..................................................................................................................16 信號(hào)變換電路 ..................................................................................................................17 信號(hào)放大電路 ............................................................