分布式设备故障诊断的嵌入式数据采集系统的研制

发布时间：2018-03-03 22:23

本文选题：故障定位　切入点：故障诊断　出处：《江西理工大学》2011年硕士论文　论文类型：学位论文

【摘要】：本文根据工业现场设备分散的特点,结合多级流模型提出并设计了一种采用CAN协议总线作为数据传输手段,对现场设备的温度、压力等缓变信号进行实时采样和显示,对现场故障进行故障初诊断,定位故障源,并把采集到的现场数据通过网络模块传输到以太网上供远程计算机进行管理,从而达到对分布式设备实时监测和诊断的目的。多级流模型(MFM,Multilevel flow models)对真实的物理系统以物质流、能量流、信息流的角度进行抽象,把系统目标和功能及其之间的关系通过图形符号来表达的模型。作为一种功能模型通常比相应的面向事件的模型更简单,而对系统的描述更加完全,并能显著地减少计算量,因而在实时性要求很高的故障诊断中具有明显的优势。本系统针对流程工业的温度、压力等缓变信号的采集,但为了使采集器具有分布式系统设备故障定位的功能要求,结构上采用了双单片机结构,一个负责数据采集和以太网的通信,另一块单片机主要负责对现场的故障定位。本文研究的分布式设备故障诊断的嵌入式数据采集系统发挥多级流模型的实时性高、扩展能力强的优势,适用于流程工业领域的缓变信号采集与故障定位初诊断。
[Abstract]:In this paper, according to the characteristics of industrial equipment dispersion and combined with the multistage flow model, a CAN protocol bus is used as the data transmission means to sample and display the temperature and pressure signals of the field equipment in real time. The field fault is initially diagnosed, the fault source is located, and the collected field data is transmitted to the Ethernet to be managed by the remote computer through the network module, so that the distributed equipment can be monitored and diagnosed in real time. Multilevel flow models are used to abstract real physical systems in terms of material flow, energy flow, and information flow. A model in which the objectives and functions of the system and their relationships are represented by graphical symbols. As a functional model, it is generally simpler than the corresponding event-oriented model, and the description of the system is more complete and significantly less computational. Therefore, it has obvious advantages in real-time fault diagnosis. In this system, the temperature, pressure and other slowly changing signals in the process industry are collected, but in order to make the collector have the function requirement of fault location of distributed system equipment, the structure adopts the structure of double single chip microcomputer. One is responsible for data acquisition and Ethernet communication, the other is mainly responsible for fault location. The embedded data acquisition system for distributed equipment fault diagnosis is suitable for slow signal acquisition and initial diagnosis of fault location in the field of process industry because of the advantages of high real-time and strong extensibility of multistage flow model.
【学位授予单位】：江西理工大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH165.3

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