基于FBG的电力铁塔塔身主梁受力形变研究  

Research on deformation by stress of main beam of power tower body based on FBG

作　　者：胡明耀[1,2] 王达达[3] 代云洪[1,2] 汪春莉 郭丹[4] 李川[1] 

机构地区：[1]昆明理工大学信息工程与自动化学院,云南昆明650500 [2]云南电网公司研究生工作站,云南昆明650217 [3]云南电网公司培训中心,云南昆明650217 [4]中天日立光缆有限公司,江苏南通226463

出　　处：《传感器与微系统》2014年第7期24-27,31,共5页Transducer and Microsystem Technologies

基　　金：云南省自然科学基金资助项目(2007FM181M);云南省应用基础研究计划资助项目(2013FZ021);昆明理工大学人才培养基金资助项目(KKSY201303044)

摘　　要：电力铁塔作为电力输送的支柱,其安全可靠性直接关系到整个电力系统的安全域经济运行。然而在各种自然因素的影响下,铁塔塔身主材的应力会加大,这可能会造成铁塔发生压坏、拉坏、扭坏等现象。研制了电力铁塔的塔架模型,将4只光纤Bragg光栅(FBG)分别安装于塔身主材2根左平面桁架的表面和2根右平面桁架的表面,测点分别位于4根主材的1/2处。通过荷载改变塔身主材所受内力,使得各根主材发生挠度变化,从而导致粘贴其表面的FBG产生波长移位。荷载试验表明:在对铁塔塔身主材进行加载和卸载时,位于铁塔塔身主材的4个测点的FBG的实验灵敏度分别为5,6,7,6pm/kg,重复性误差为1.9%,2.6%,3.2%,1.2%FS。Power tower is crucial to the power transmission,its safety and reliability is directly related to economic operation of the entire power grid system.However,power transmission tower is probably crushed,pulled,twisted and to be broken by the increasing stress of tower body as several of natural factors.A model of power tower is developed,two fiber Bragg gratings（ FBG） are mounted on the surface of the left plane truss of main beams of tower body and the other two FBG are mounted on the surface of the right plane truss of main beams of tower body,where the measuring points are respectively located at the position of 1 /2 length of four main beams of tower body.The deflections of main beams are induced by internal stress of loading,which cause the wavelength shift of FBG mounted on the surfaces of main beams.Loading experiment indicates that load sensitivities of four measuring gratings respectively are 5,6,7,6 pm /kg when the loading and unloading effects on main beams of tower body,the repeatability errors are 1.9 % FS,2.6 % FS,3.2 % FS,1.2 % FS.

关 键 词：光纤BRAGG光栅 塔身主材 应力 形变 波长移位 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置]