光纤光栅负荷传感器在港口门机上的应用  

FBG Load Sensor Applied in Portal Bridge Crane

作　　者：周勇[1] 高淼[1] 潘建军[1] 

机构地区：[1]武汉理工大学光纤传感技术与信息处理教育部重点实验室,湖北武汉430070

出　　处：《光学与光电技术》2010年第5期16-19,共4页Optics & Optoelectronic Technology

基　　金：国家自然科学基金(60537050)资助项目

摘　　要：港口门式起重机的光纤布喇格光栅负荷传感器将钢索张力转变为对测力传感器的正压力,测力元件采用等应变梁结构,使固定在上下表面的光栅同时受到拉力和压力,以两光栅反射波长位移量的叠加表示钢索受到的载荷。该装置提高了测量灵敏度和线性度,而且抵消了环境温度的干扰。标定数据表明,光纤光栅负荷传感器的误差只有0.7%,大大优于电应变片3%的精度指标要求。An equal-strain beam is used as sensing element in wire robe tensive monitoring device of portal bridge crane by the sensing technology of fiber Bragg grating （FBG）. The mechanical unit converts rope tension into positive pressure on the equal-strain beam to pull the tensive FBG and to press the pressurized FBG which are fixed on the nether surface and the up- per surface of the equal-strain beam respectively. The FBG responds a shift of reflective wavelength when the wire rope is under tension. This FBG sensing device improves the linearity and sensitivity of measurement and eliminates the temperature interference of environment. The calibration shows that the error of FBG is only 0. 7%, better than the allowable error, 3%, of electric strain gage unit.

关 键 词：门机 负荷 光纤布喇格光栅 等应变梁 

分 类 号：TN253[电子电信—物理电子学]