【作者】 唐兵；

【导师】 周建中；

【作者基本信息】 华中科技大学 ， 系统分析与集成， 2006， 硕士

【摘要】 随着水电事业的发展,大量水轮发电机组投入使用,维护以及保障其运行安全越来越重要。振动是影响水轮机组正常运行和使用寿命的主要因素,因此实时监测振动信号对大中型水轮发电机组的故障预测具有重要意义。一个完整的振动监测系统包括很多方面,其中信号数据采集、处理与传输是振动监测系统的最基本的环节。传统的以简单微控制器为核心的振动监测系统,监测点少,实时性差;而以微机为核心的振动监测系统,成本大,费用高。本文在参考了典型的振动监测系统后,提出了一种基于现场总线的水轮机组振动监测系统。该监测系统采用TI公司新款数字信号处理器(DSP)TMS320F2812作为振动监测系统的主控制器,使用其内置高速高精度模数转换器(ADC)采集现场数据,并利用其内置增强型局域网控制器(eCAN)组成CAN网络,具有抗干扰能力强、扩展性好、实时性高、数据传输可靠、安装简单、信号处理技术先进和性价比高等诸多优点。本文围绕水轮机组振动监测系统的设计与开发问题,首先论述了水轮机组在线监测的重要性,概述了振动监测理论国内外研究状况,提出了本课题的任务和目的;然后分析了水轮机组振动信号特征及其产生原因,介绍了振动监测所需要的关键技术,提出了水轮机组振动监测系统的总体架构;接着针对振动监测节点的功能需求,分析了CAN总线的数据传输能力和振动监测节点控制器数据处理的实时性;最后详细描述了振动监测节点的硬件设计和软件设计。更多还原

【Abstract】 With the development of Hydropower, lots of hydraulic generators have been put into practice. Vibration is one of the main factors that influence running security and life-span of generators. So vibration on-line monitoring is very important for generator fault diagnosis.A complete on-line monitoring system includes many aspects. Signal data collection and signal processing are foundmental. They are key parts in an on-line monitoring system. Traditional fault monitoring system uses simple MCU as its main controller. Its monitoring nodes are less and its real time performance is worse. Vibration monitoring system using microcomputer as the main controller cost a lot. Considering this, this paper puts forward a hydraulic generators vibration on-line monitoring system based on can bus. This paper uses digital signal processor TMS320F2812 as the main controller of on-line monitoring system. This system uses its built-in high speed analog to digital converter module to sample local data and also uses its built-in can module to form can bus network. It has many advances such as high real time performance, fast communication speed, low coat and so on.This paper designs and develops a hydraulic generator Vibration Monitoring System. Firstly it decribes the importance of hydraulic generators on-line monitoring and introduces the general situation of vibration on-line monitoring theory. After that it puts forwards the main contents of this paper. Secondly it analyses the characteristic and the cause of vibration from hydraulic generators. Then it introduces key technique which vibration on-line monitoring needs and gives the whole structure of hydraulic generator Vibration Monitoring System. Thirdly, this paper decribes main functions of this system and analyses transportation capability of can bus. And it also analyses the real-time performance. Lastly this paper introduce the hardware design and the soft design in details.更多还原