摇摆表测试规模化造建筑:比较各种微电子机械系统加速器 (MEMS) 的性能,用于结构健康监测
Giuseppe Occhipinti1, Francesco Lo Iacono2, Giuseppina Tusa1
1Istituto Nazionale di Geofisica e Vulcanologia-Osservatorio Etneo, 95125 Catania, Italy.
Sensors (Basel, Switzerland)
|February 26, 2025
概括
这项研究测试了MEMS加速度计与传统传感器在模拟地震期间的石头建筑模型. 超低噪声传感器对于精确的结构健康监测和在地震事件中检测损坏至关重要.
科学领域:
- 结构工程 结构工程
- 地震学 地震学
- 材料科学 材料科学 材料科学
背景情况:
- 石头建筑易受地震活动的影响.
- 准确的结构健康监测 (SHM) 对易地震的地区至关重要.
- 在现实的地震条件下评估传感器性能至关重要.
研究的目的:
- 为了评估MEMS加速度计的性能与石头结构的SHM压电传感器相比.
- 评估不同类型传感器在捕捉地震事件期间结构行为和损伤进展方面的有效性.
- 在杂的环境中确定传感器规格,以实现可靠的运行模式分析 (OMA).
主要方法:
- 在摇摆桌上测试了一座两层石头造建筑的2:3尺度模型.
- 模拟的Mw 6.3地震地面运动 (L'Aquila 2009) 应用于加速水平的增加.
- 一个由MEMS (A和B类) 和压电加速度计组成的网络被用来记录结构反应.
- 分析了数据,以比较传感器的准确性,适合OMA和损坏检测能力.
主要成果:
- 所有测试的传感器都准确地测量了地震刺激期间的动态反应.
- 中低成本的MEMS加速度计在杂的环境中由于自我噪音而出现限制.
- 对于OMA,建议使用超低噪音的MEMS加速度计 (自我噪音<1μg/√Hz,最好<0.5μg/√Hz).
- 传感器自身噪声是SHM中可靠OMA的关键因素.
结论:
- 该研究强调了传感器自我噪声规格对于石结构有效的SHM的重要性.
- 建议使用超低噪声传感器来检测地震事件发生前后微妙的结构变化.
- 这些发现有助于选择合适的传感器,用于管理地震易发地区的建筑物,并评估地震脆弱性.
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