电杆仿风载荷弯矩自动加载系统的设计与实现

发布时间：2018-04-22 22:36

本文选题：电杆基础 + 风载荷　；参考：《福州大学》2014年硕士论文

【摘要】：桩基础是输配电工程结构中常用的基础形式之一,属于地下隐蔽工程,施工技术相对比较复杂,施工时稍有不慎极易出现倾覆、断桩等质量问题,从而直接关系到整个桩基工程的安全。因此,对桩基进行质量检测具有重要意义。目前国内外桩基检测主要是针对桩基承载力和桩身完整性的检测。但在电力系统中,对杆塔基础仅仅进行承载力和桩身完整性的检测是不够的。在我国沿海地区,台风来临时,总会造成大量电杆倒掉的现象,主要原因之一就是电杆基础施工存在缺陷,不能抵抗风力对基础的作用弯矩。因此,对电杆基础进行抗倾覆弯矩的检测是很必要的。为此,本文结合福州大学与福建省电力科学研究院合作项目“电杆试验装置测控系统研制”课题,以配网线路中的直线杆塔(不带拉线)为研究对象,提出了一种操作方便、安全可靠的电杆仿风载荷弯矩自动加载系统。通过构建硬件平台和软件设计,实现了以PC机为核心的电杆弯矩自动加载系统的设计。首先,本文基于弯矩等效,通过对常规电杆的风载荷进行数学建模,给出了挂导线电杆风载荷的计算方法,以及常规电杆所受风载荷的限值,为后续的弯矩自动加载系统的设计奠定了理论基础。其次,提出了电杆弯矩加载机构模型,通过对弯矩加载机构四个方面的力学优化完成了加载机构的机械设计；并在此基础上,通过对加载机构加装检测节点和动力与控制装置,提出了弯矩自动加载系统的总体设计方案；本文选择电动推杆作为弯矩加载的动力装置,通过上位机对电动推杆进行直接控制,并在机构上设置了三个检测节点,从而完成了控制系统硬件平台的搭建。再次,基于电杆弯矩自动加载系统所要实现的具体功能,对控制系统的软件部分进行设计。采用面向对象的编程方法,在Delphi 7.0环境下,基于SPComm第三方控件,设计了上位机与检测节点、上位机与电动推杆驱动器的串口通信,完成了弯矩自动加载系统的操作界面和控制程序的设计。最后,对整个系统进行现场安装、试验、拆卸,结果表明,该电杆弯矩自动加载系统可以有效实现弯矩的自动加载和卸载,现场装拆方便,操作简单,达到了预期效果。
[Abstract]:Pile foundation is one of the commonly used foundation forms in transmission and distribution engineering structure. It belongs to underground concealed engineering, and the construction technology is relatively complex. Therefore, it is directly related to the safety of the whole pile foundation project. Therefore, it is of great significance to check the quality of pile foundation. At present, pile foundation testing at home and abroad is mainly aimed at pile bearing capacity and pile integrity. But in power system, it is not enough to check the bearing capacity and pile integrity of tower foundation. In the coastal area of our country, when typhoon comes, a large number of poles fall down. One of the main reasons is that there are defects in the construction of pole foundation, which can not resist the bending moment of wind force on the foundation. Therefore, it is necessary to detect the overturning moment of pole foundation. Therefore, in this paper, combining with the project of Fuzhou University and Fujian Electric Power Research Institute, "the development of measuring and controlling system of electric pole test device", a kind of convenient operation is put forward by taking the linear pole tower (without pulling wire) in the distribution network line as the research object. Safe and reliable automatic loading system of pole wind load bending moment. By constructing hardware platform and software design, the design of pole bending moment automatic loading system based on PC is realized. Firstly, based on the equivalent bending moment, the wind load of the conventional pole is modeled, and the calculation method of the wind load and the limit value of the wind load on the conventional pole are given. It lays a theoretical foundation for the design of automatic bending moment loading system. Secondly, the load mechanism model of pole bending moment is put forward, and the mechanical design of the loading mechanism is completed through the mechanical optimization of the four aspects of the moment loading mechanism, and on this basis, the testing node and the power and control device are added to the loading mechanism. The overall design scheme of the bending moment automatic loading system is put forward in this paper, the electric push rod is chosen as the power device of moment loading, the electric push rod is controlled directly by the upper computer, and three detecting nodes are set up on the mechanism. Thus, the hardware platform of the control system is built. Thirdly, the software part of the control system is designed based on the concrete function of the automatic loading system of pole bending moment. The serial communication between the upper computer and the detecting node, the upper computer and the electric push rod driver is designed based on the third party control of SPComm in the environment of Delphi 7.0 by using the object-oriented programming method. The operation interface and control program of the bending moment automatic loading system are designed. Finally, the field installation, test and disassembly of the whole system are carried out. The results show that the automatic loading system can effectively realize the automatic loading and unloading of the bending moment, and it is convenient to install and disassemble in the field, and the operation is simple, and the expected effect is achieved.
【学位授予单位】：福州大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM75

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