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关于iPhone基于LiDAR的振动测量和模态分析传感系统的描述
Gledson Rodrigo Tondo1, Charles Riley2, Guido Morgenthal1
1Chair of Modelling and Simulation of Structures, Bauhaus University Weimar, Marienstr. 13, 99423 Weimar, Germany.
Sensors (Basel, Switzerland)
|September 28, 2023
概括
移动LiDAR传感器可以测量振动以进行模态分析,尽管采样速率为15Hz. 这项技术显示了结构性健康监测的潜力,特别是在具有挑战性的环境中.
科学领域:
- 工程 工程师 工程师 工程师
- 物理 物理学 物理
- 计算机科学 计算机科学
背景情况:
- 使用飞行时间LiDAR的便携式深度传感技术集成到像iPhone 13 Pro这样的现代移动设备中.
- 激光雷达传感器提供非接触式测量功能,使其对各种传感应用具有吸引力.
研究的目的:
- 描述移动LiDAR系统的性能,用于模态分析中的全场振动测量.
- 评估传感器在噪音,频率响应和操作范围方面的限制和质量.
- 调查环境因素对测量准确性的影响,如手机到目标的距离和照明条件.
主要方法:
- 一个振动的目标被用来测试LiDAR传感器与激光移位传感器.
- 实验进行了不同的电话到目标距离和照明条件.
- 深度地图数据使用静态子空间识别 (SSI) 进行处理,用于模态参数识别.
主要成果:
- 发现最佳的电话到目标距离在0.30m和2.00m之间.
- 实际的LiDAR深度地图采样速率被证实为15 Hz,而不是指定的60 Hz率.
- 尽管有噪声,但与参考变频器相比,自然频率的平均误差为1.9%,并且获得了不确定性的模式形状.
结论:
- 移动激光雷达 (LiDAR) 是一种可行的工具,用于模式识别,当与结构系统的先前知识相结合时.
- 15Hz的采样速率需要下降采样,以便进行准确的振动分析.
- 该技术在可访问和具有挑战性的场景中具有结构性健康监测和诊断的巨大潜力.
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