基于PMUT的系统用于持续监测预装螺栓连接的螺栓连接
Stefano Sanvito1, Marco Passoni2, Domenico Giusti3
1Department of Engineering and Applied Science, University of Bergamo, Via Galvani, 2, 24044 Dalmine, Italy.
Sensors (Basel, Switzerland)
|July 13, 2024
概括
这项研究引入了一种新的螺栓预加载监控系统,该系统使用了压电微加工超声波传感器 (PMUT). 该系统测量了声波飞行时间的变化,以准确,低成本,连续的螺栓负载监测.
科学领域:
- 机械工程 机械工程
- 材料科学 材料科学 材料科学
- 传感器技术 传感器技术
背景情况:
- 在各种工程应用中,螺栓预载对于结构完整性和安全性至关重要.
- 现有的监测螺栓预装载的方法可能是昂贵的,复杂的,或不适合持续的现场使用.
- 准确和实时的预装载监控对于防止结构故障和确保运行安全至关重要.
研究的目的:
- 开发和验证一种新的,低成本的螺栓预装载监测系统.
- 调查用于测量螺栓预负载的压电微加工超声波传感器 (PMUT) 的使用.
- 为了证明使用声波飞行时间变化 (CTOF) 来预负载量化声波的可行性.
主要方法:
- 系统架构设计和算法开发用于螺栓预加载监控.
- 有限元法 (FEM) 模拟以优化传感器配置和分析波传播.
- 使用脉冲回声模式的PMUT测量CTOF在不同的负载条件下进行实验验证.
- 开发一种新型的组装工艺,用于PMUT-螺栓合器的弹性钢声阻抗匹配层.
主要成果:
- 使用PMUT和CTOF成功测量了螺栓预负载的实验测量,实现了良好的信号噪声比.
- FEM模拟提供了有关波浪传播的见解,以及各种参数对测量准确性的影响.
- 证明了新型声学合方法对可靠信号传输的有效性.
- 首次通过PMUT实现了试验性螺栓预负载测量.
结论:
- 开发的基于PMUT的系统为螺栓预装载监控提供了一个可行的,低成本的解决方案.
- 该CTOF测量技术显示了持续,现场监测螺栓完整性的巨大潜力.
- 该系统的小尺寸和低成本使其适用于整个螺栓使用寿命的广泛现场应用.
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01:23Stresses under Combined Loadings
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