• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2022, Vol. 58 ›› Issue (8): 71-78.doi: 10.3901/JME.2022.08.071

• 特邀专栏:机械装备的光纤传感检测与应用 • 上一篇    下一篇

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用于机械装备的高性能光纤光栅倾斜传感器

郭永兴1,2, 熊丽1,2, 周兴林1,2, 朱建阳1,3, 侯宇1,3, 朱攀1   

  1. 1. 武汉科技大学冶金装备及其控制教育部重点实验室 武汉 430081;
    2. 武汉科技大学机械传动与制造工程湖北省重点实验室 武汉 430081;
    3. 武汉科技大学机器人与智能系统研究院 武汉 430081
  • 收稿日期:2021-01-05 修回日期:2021-12-05 出版日期:2022-04-20 发布日期:2022-06-13
  • 通讯作者: 郭永兴(通信作者),男,1986年出生,博士,副教授,博士研究生导师。主要研究方向为光纤光栅传感技术、机器人光纤智能感知技术、机械装备与土木工程的结构健康监测。E-mail:yongxing_guo@wust.edu.cn
  • 作者简介:熊丽,女,1989年出生,博士,讲师。主要研究方向为光纤光栅传感技术、光纤F-P传感技术、手术机器人传感技术。E-mail:xiongli681112@wust.edu.cn
  • 基金资助:
    国家自然科学基金(52075397,52105558)国家重大科研仪器研制(51827812)资助项目。

High Performance Fiber Bragg Grating Tilt Sensor for Mechanical Equipment

GUO Yongxing1,2, XIONG Li1,2, ZHOU Xinglin1,2, ZHU Jianyang1,3, HOU Yu1,3, ZHU Pan1   

  1. 1. Key Laboratory of Metallurgical Equipment and Control Technology, Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081;
    2. Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering, Wuhan University of Science and Technology, Wuhan 430081;
    3. Institute of Robotics and Intelligent Systems, Wuhan University of Science and Technology, Wuhan 430081
  • Received:2021-01-05 Revised:2021-12-05 Online:2022-04-20 Published:2022-06-13

摘要: 实时的倾斜状态监测对大型风电塔筒、海上浮吊等重大机械装备的服役安全非常重要,而现有的电磁信号原理的倾斜传感器存在难以适应恶劣环境、大规模组网能力差、信号传输不够稳定等实际问题,为此研究了一种光纤光栅原理的新型倾斜传感器。基于经典等强度梁弹性元件,创新提出一种质量块与等强度梁之间活动连接和弹簧减震连接的新型倾斜传感机制。与现有的光纤光栅倾斜传感设计相比,被测对象振动引起的质量块摆动可被阻隔吸收,实现质量块和悬臂梁之间只传递力而不传递振动的良好效果。在阐述传感器结构设计细节、测量理论的基础上,制备了传感器样机,开展了全面的性能测试。试验结果表明,传感器在±15°的量程内,具有146.899 pm/(°)的高灵敏度,测量分辨率可达6.8×10-4°,重复性误差小于4.125%。传感器还具备优越的抗蠕变性能、-40℃到60℃温度环境的适用性和良好温度补偿能力。经过对比测试,传感器的综合测量精度可达0.157°,且抗振动效果明显,在大型机械装备的安全监测领域应用潜力巨大。

关键词: 光纤光栅, 倾斜传感器, 机械装备, 安全监测

Abstract: Real-time tilt monitoring is very important for the safety of large wind power towers, offshore floating cranes, and other major mechanical equipment. The existing tilt sensors based on the electromagnetic signals have some common shortcomings in practical applications such as inapplicability in harsh environments, poor large-scale networking capabilities, and insufficient signal transmission. Therefore, this work developed a novel fiber Bragg grating(FBG) tilt sensor. Based on equal strength beam, we proposed a new sensing mechanism with a movable and spring damping connection between the mass and the beam. Compared with the existing design, the mass swing induced by the vibration of the measured object can be absorbed, which eliminates the coupling output caused by vibration interference. The mechanical structure, operation principle, and corresponding theoretical model are presented in detail. Then a FBG tilt sensor prototype was manufactured and fully tested. Test results show that the sensor provides a high sensitivity of 146.899 pm/(°) within a range of ±15°, a measuring resolution of 6.8×10-4 °, a repeatability error less than 4.125%. Furthermore, good creep resistance, and good temperature compensation and applicability from -40℃ to 60℃ have also been demonstrated. Through comparative testing, the sensor possesses a measuring accuracy of 0.157° and good vibration resistance. These results demonstrate that the sensor has strong applicability in safety monitoring of major mechanical equipment.

Key words: fiber Bragg grating, tilt sensor, mechanical equipment, safety monitoring

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