3D microwave vibrometer: Contactless three-dimensional vibration measurements using microwave radars

激光多普勒测振仪 振动 加速度计 声学 雷达 流离失所(心理学) 结构健康监测 计算机科学 激光扫描测振法 工程类 电子工程 激光器 光学 结构工程 物理 电信 操作系统 心理治疗师 心理学 分布反馈激光器
作者
Zesheng Ren,Yuyong Xiong,Zhike Peng,Guang Meng
出处
期刊:Mechanical Systems and Signal Processing [Elsevier BV]
卷期号:183: 109622-109622 被引量:2
标识
DOI:10.1016/j.ymssp.2022.109622
摘要

The emerging radar-based vibration measurement technology has attracted much interest in a wide spectrum of applications, such as mechanical test, structural health monitoring, machine diagnosis and vital sign detection. Advances in large monitoring range, high accuracy and excellent test efficiency and environmental adaptability have allowed radar-based vibration measurement method to perform enough superiority over traditional contact measurements like accelerometers or optical ways such as laser triangulation sensors or video/image-based measurements. However, the state of the art for radar vibration measurements mostly focuses on the quantification of one-dimensional vibrational measurement. This paper aims to present an accurate three-dimensional (3D) vibration measurement approach using three microwave radars via linear frequency modulated continuous wave (LFMCW) radars. The system overview and fundamental concept are illustrated firstly. To achieve 3D space trajectory and displacement of a vibrating target, we show the detailed procedures about coordinate system establishment and 3D displacement reconstruction process. Moreover, the error factors and analysis involved in our method are also discussed, allowing robust and accurate measurement for practical applications. Simulation and experimental validations are provided for demonstrating the performance of the method, offering a desired approach for contactless 3D vibration and displacement measurement.
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