基于光纤光栅翻车机溜槽群料位监测技术的研究

发布时间：2018-01-09 12:17

本文关键词：基于光纤光栅翻车机溜槽群料位监测技术的研究　出处：《武汉理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：料位检测在工业生产中占据着重要的地位。但是现有的常用检测技术存在误信号高,维护工作量大的问题,特别是目前比较通用的γ射线料位计存在着对人体健康危害性大,日常维护难度大,一旦发生丢失或破损其后果难以控制等突出缺陷,因此研究一种实用、安全、可靠、安装维护便利的料位检测技术对实现给料系统的完全自动化控制有着重要的意义。翻车机是大型、高效、自动化的成套卸车设备,是散料输送系统中的最重要环节,是煤炭卸载的关键设备,其安全运行直接关系到企业的经济效益。翻车机底层给料溜槽的料位检测十分重要,由于受到现场复杂恶劣工况的影响,给料位测量带来诸多不便,一旦发生检测不及时或误信号反馈,将会导致冒斗或空震等问题的发生,严重影响设备和人员安全,降低企业的运行效率。本文通过对翻车机溜槽有限元分析和多次现场料位检测实验验证,建立了基于分布式FBG的翻车机溜槽群料位监测系统模型,对应力集中点或最大应力点实时准确定位,不仅能够为工作人员提供准确的故障位置信息并实时在线监测溜槽料位变化,及时检测出冒斗或空震等问题,防止料的排空或溢出,保证各溜槽物料的协调一致供给,提高系统的整体卸车效率,而且将改变传统的料位检测技术模式,在港口实现大型港机设备的基于光纤传感器的料位在线连续检测功能,满足物流网时代港口企业对关键大型设备的安全管理要求,并最终实现翻车机系统的完全自动化协调给料作业。本论文的主要工作:(1)研究分析了翻车机溜槽料位检测技术的现状,并介绍了光纤光栅传感技术的发展现状。(2)为了分析荷载加载方式,我们分析了煤料流动特性对溜槽卸料过程的影响。通过对煤料侧向摩擦的理论分析研究,并结合翻车机溜槽结构的有限元模型分析,实现了溜槽辐板在静态和动态载荷作用下的载荷分布规律,光纤传感器布设技术的研究及构建检测系统模型。(3)分析了面向料位监测的光纤光栅应变传感模型,并对传感器弹性体进行了有限元分析和实验分析,结果表明传感器具有良好的一致性和重复性,能够满足工程实际测量。(4)分析了光纤光栅料位监测系统的设计方法,对传感器的安装和料位监测系统进行研究。(5)对翻车机溜槽料位监测系统进行了现场的运行测试运用,并实现了相应的系统功能,实验结果表明基于光纤光栅的料位监测技术能够良好地对翻车机溜槽料位长期实时在线监测。
[Abstract]:Material level detection in industrial production occupies an important position. But the detection technique of the existing error signal is high, the maintenance workload, especially the more general gamma ray level meter has caused great harm to human health, daily maintenance is difficult, in case of loss or damage is difficult to control the consequences other prominent defects, so the research of a practical, safe, reliable, convenient installation and maintenance of material level detection technology to realize to fully automated control of the feeding system has important significance. The dumper is large, efficient, automated complete unloading equipment, is the most important part of bulk material conveying system, is the key equipment coal unloading, its safe operation is directly related to the economic benefits of the enterprise. The dumper bottom feed trough liquid level detection is very important, because of complex scene of harsh conditions, feeding position measurement Bring a lot of inconvenience, the event detection is not timely or error feedback signal will lead to take the bucket or empty shock problems, seriously affect the safety of equipment and personnel, reduce the operating efficiency of the enterprise. Through the material level detection experiments on the dumper chute finite element analysis and field, established a distributed FBG dumper chute group level monitoring system based on the model, the stress concentration point or the maximum stress point of real-time accurate positioning, can not only provide accurate fault location information for the staff and the real-time online monitoring of chute material changes, timely detection of problems such as empty bucket or take the shock, to prevent material emptying or overflow, ensure consistent supply of the chute material, improve the overall handling efficiency, but also change the traditional mode of material position detection technology, in the port of large port machine equipment based on optical fiber sensor in material The continuous line detection function, meet the requirements of the safety management of key equipment of the logistics network era of port enterprises, and finally realize the completely automatic dumper system coordinated feeding operation. The main work of this paper: (1) research and analysis of the status of a dumper chute material detection technology, and introduces the development status of fiber grating sensor technology. (2) in order to analyze the loading pattern, we analyze the influence on flow characteristics of coal chute unloading process. Based on the coal lateral friction theoretical analysis, combined with the finite element analysis model of car dumper chute, the load in the static and dynamic load distribution chute the web, and Study on the construction of optical fiber sensor layout technology detection system model. (3) analysis for monitoring the material level of the fiber Bragg grating strain sensing model of sensor, and elastomers were Co. Element analysis and experimental analysis, results show that the sensor has good consistency and repeatability, which can meet the engineering actual measurement. (4) analyzed the design method of monitoring system of fiber grating material, to study the sensor installation and material level monitoring system. (5) were tested using the field operation of car dumper chute level monitoring system, and realize the function of this system, the experimental results show that the fiber grating material level monitoring technology can well level long-term online monitoring of car dumper based on the chute.

【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TP274

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