• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2019, Vol. 55 ›› Issue (14): 19-29.doi: 10.3901/JME.2019.14.019

• 仪器科学与技术 • 上一篇    下一篇

位感条纹三维振动测量原理及试验研究

钟剑锋1, 钟舜聪1, 彭志科2   

  1. 1. 福州大学机械工程及自动化学院 福州 350116;
    2. 上海交通大学机械系统与振动国家重点实验室 上海 200240
  • 收稿日期:2018-05-03 修回日期:2019-03-27 出版日期:2019-07-20 发布日期:2019-07-20
  • 通讯作者: 钟舜聪(通信作者),男,1976年出生,博士,教授,博士研究生导师。主要研究方向为结构健康监测和设备故障诊断、无损检测和定量评价、光学精密诊断仪器和太赫兹技术等。E-mail:sczhong@fzu.edu.cn
  • 作者简介:钟剑锋,男,1988年出生,博士,讲师。主要研究方向为机电系统状态监测与智能诊断技术研究。E-mail:zhongjianfeng@fzu.edu.cn;彭志科,男,1974年出生,博士,教授,博士研究生导师。主要研究方向为非线性振动理论及方法、振动信号分析、设备故障诊断等。E-mail:z.peng@sjtu.edu.cn
  • 基金资助:
    国家自然科学基金(51675103)、机械系统与振动国家重点实验室开放课题基金(MSV-2018-07)、上海市自然科学基金(18ZR1414200)和福建省科技计划(2019I0004)资助项目。

Theoretical and Experimental Studies on 3D Vibration Measurement Based on Displacement-sensitive Fringe Pattern

ZHONG Jianfeng1, ZHONG Shuncong1, PENG Zhike2   

  1. 1. School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou 350116;
    2. State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240
  • Received:2018-05-03 Revised:2019-03-27 Online:2019-07-20 Published:2019-07-20

摘要: 针对当前单目视觉测量方法难以实现结构三维振动同步测量的问题,提出一种基于位感条纹和高速相机的结构三维振动同步测量新方法。在建立测量系统完整的原理模型基础上,系统描述单相机成像坐标下采用单个位感条纹获取结构三维动态位移信息的测量原理,建立成像位感条纹三维编码动态参数与结构实际三维位移之间的内在联系,推导各维位移的计算公式。通过结构三维运动和视觉成像系统的联合仿真模型,验证位移测量原理和算法的正确性;并通过仿真和试验分析系统的测量性能及其影响因素。通过对结构已知三维运动的测量,并与基于三维加速度传感器的接触式测量方法进行对比试验,验证基于位感条纹的视觉测量方法及系统在实现结构三维振动位移准确同步测量的有效性。

关键词: 高速相机, 三维振动, 同步测量, 位感条纹

Abstract: A novel method for the measurement of structural three-dimensional (3D) vibration based on a displacement-sensitive fringe pattern (DSFP) and a high speed camera is proposed to overcome the simultaneous measurement problem in structural 3D vibration using monocular vision. Based on the established model of the proposed monocular vision measurement system, the measurement principle for structural 3D vibration is illustrated systematically. The relationships between the real 3D displacement and the 3D dynamics parameters obtained from the recorded DSFP image sequence is established. The formulas for calculating each dimensional displacement is also derived. The correctness of the displacement measurement principle and algorithm is verified by using the co-simulation model of structural 3D motion and monocular vision system. The performance and its influencing factors of the measurement system are evaluated by simulation and experiment. The experimental results for known structural 3D displacement and the contrast test results with the 3D acceleration sensor demonstrates the effectiveness of the proposed DSFP and vision based system in structural 3D displacement measurement.

Key words: 3D vibration, displacement-sensitive fringe pattern, high-speed camera, simultaneous measurement

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