滑动式光纤布拉格光栅位移传感器

发布时间：2018-02-11 16:19

本文关键词： 光纤传感器光纤Bragg光栅(FBG) 位移传感器悬臂梁等强度梁　出处：《光学精密工程》2017年01期 　论文类型：期刊论文

【摘要】：为克服现有光纤光栅位移传感器设计中存在的传力介质弹性系数易改变、滑块易产生偏移等对测量精度的不利影响,提出了一种滑动式位移传感器。楔形滑块的滑动面和限制面的采样互相垂直、等强度梁的变截面和一体化、滑动面圆弧化等特殊设计,使传感器具有抗滑动干扰性、梁挠位移测量的高灵敏性、长期往复测量的耐磨性等优点。阐述了传感器测量原理,加工制造了传感器原型,并开展了全面的性能测试。测试结果和误差分析表明:传感器在0~100mm的量程中,灵敏度为20.11pm/mm,精度达到0.099 5%F.S,具备良好的微位移测量能力;重复性误差和迟滞误差分别仅为0.705%和0.403%,且抗蠕变性能良好,可满足机械装备、土木工程等重大设施的结构健康监测对位移、变形测量的精度和长期稳定性要求。
[Abstract]:In order to overcome the negative influence on the measurement accuracy, such as the elastic coefficient of force transfer medium is easy to change and the slider is prone to offset in the design of fiber Bragg grating displacement sensor, A sliding displacement sensor is proposed. The sliding surface of the wedge slider and the sampling of the limiting surface are perpendicular to each other, the variable section and integration of the equal strength beam, the arc of the sliding surface, and so on, so that the sensor has the ability to resist sliding interference. The high sensitivity of beam torsion displacement measurement and the wear resistance of long term reciprocating measurement are discussed. The sensor prototype is manufactured and the principle of sensor measurement is described. The test results and error analysis show that the sensor has a sensitivity of 20.11pm / mm and an accuracy of 0.0995F.S. the sensor has good micro-displacement measurement capability. The repeatability error and hysteresis error are only 0.705% and 0.403, respectively, and the creep resistance is good, which can meet the requirements of structural health monitoring of mechanical equipment, civil engineering and other major facilities for displacement, deformation measurement accuracy and long-term stability.
【作者单位】：武汉科技大学机械自动化学院;武汉理工光科股份有限公司;天津工业大学电子与信息工程学院天津市光电检测技术与系统重点实验室;
【基金】：国家自然科学基金资助项目(No.51605348,No.51578430,No.51509194) 中国博士后科学基金资助项目(No.2015M572208)
【分类号】：TN253;TP212

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