工程机械嵌入式故障诊断装置研究

发布时间：2017-12-31 06:09

本文关键词：工程机械嵌入式故障诊断装置研究　出处：《华侨大学》2011年硕士论文　论文类型：学位论文

更多相关文章： 工程机械 故障诊断 OBD-Ⅱ CAN DSP

【摘要】：工程机械在各类工程建设中有着广泛的应用。工程机械具有功率大、效率高的特点,但工程机械系统非常复杂,涉及的专业知识面广,若出现故障后不能及时找出故障原因,那么维修和维护就会影响工程进度,从而影响工作效率。因此,选择合适、高效的故障诊断方法对提高系统的可靠性和安全性具有重要的意义。本论文通过对工程机械故障诊断方法和OBD-Ⅱ的研究,确定将OBD-Ⅱ故障诊断方法应用在工程机械上,实现在线实时故障诊断。OBD是英文On-Board Diagnostics的缩写,中文翻译为“车载自动诊断系统”。论文对工程机械的故障诊断方法进行了详细的描述,研究了OBD-Ⅱ的发展及应用。对OBD-Ⅱ的通讯协议和诊断模式进行了深入的研究,确定了基于CAN总线的诊断通信协议。论文中采用DSP芯片TMS320F2812为主控芯片构造诊断设备的硬件系统,主要包括电源模块、JTAG模块、CAN通信模块、SCI串口通信模块、键盘输入模块、LCD液晶显示屏显示模块等。硬件原理设计及PCB设计均在Protel DXP 2004硬件环境下设计完成。PCB采用四层电路板,在PCB板布局、布线、电源层分割和地线设置等方面做了详细的介绍。软件系统按功能分成几个模块:主函数模块、串口通信模块、CAN通信模块、键盘输入模块、故障码处理模块和液晶显示模块。论文中分析了各模块主要函数的设计思路和实现方式。通过主函数对其他子函数的调用实现系统的诊断功能。各函数功能采用C语言编程实现,在CCS3.3软件环境下编写、调试,最后烧写到DSP芯片内。论文最后总结了已完成的工作,对课题接下来的发展方向和要解决的问题进行了展望,对后续工作进行了分析。
[Abstract]:Engineering machinery has been widely used in various types of construction projects. The engineering machinery has the advantages of high power, high efficiency, but the engineering mechanical system is very complex, involving extensive professional knowledge, if it is failure to find out the cause of the malfunction, the repair and maintenance will affect the progress of the project, thus affecting the work efficiency. Therefore, select the appropriate, efficient fault diagnosis method has an important significance to improve the reliability and safety of the system.
In this paper, by studying the fault diagnosis method of construction machinery and OBD- II, it is determined that the OBD- II fault diagnosis method is applied to construction machinery to realize online real-time fault diagnosis..OBD is the abbreviation of English On-Board Diagnostics, and the Chinese version is "vehicle automatic diagnosis system".
In this paper, the fault diagnosis method of construction machinery is described in detail. The development and application of OBD- II is studied. The communication protocol and diagnosis mode of OBD- II are deeply researched, and the diagnostic communication protocol based on CAN bus is determined.
The hardware structure of the main control chip diagnostic equipment using DSP chip TMS320F2812 in the paper, including power module, JTAG module, CAN communication module, SCI communication module, keyboard input module, LCD display module. The hardware design principle and design PCB design in Protel DXP 2004 environment.PCB adopts four layers in the wiring circuit board, PCB board layout, power, and ground layer segmentation and other aspects are described in detail.
The software system is divided into several modules according to the functions: the main function module, serial communication module, CAN communication module, keyboard input module, fault code processing module and LCD display module. The paper analyzes the design idea of each module main function and realization way. Through the main function of the realization of diagnosis function of the system call on it he functions. The function was realized by C programming language under the environment of CCS3.3 software compilation, debugging, finally programmed into the DSP chip.
At the end of the paper, the completed work is summarized, the future development direction and the problems to be solved are prospected, and the follow-up work is analyzed.

【学位授予单位】：华侨大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH165.3

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