Development of an ambient vibration testing system for dynamic response monitoring of buildings using low-cost wireless sensors

环境振动试验是识别结构动力特性的重要手段。的 作为行业合作伙伴，Sensequake正在开发新的算法和软件来预测结构的完整性 以及其响应于不同类型的载荷（包括基于现场环境的地震）的行为 振动数据他们的3D-SAM技术是一种三维地震评估方法， 大大减少了基于传感器的结构评估的时间。传统的有线传感器（例如， 加速度计）用于测量结构的振动响应。在一个结构中，如一个高大的 建筑物，有线传感系统变得笨重，它限制了传感器的数量和测试 配置.无线感测系统提供了一个重要的机会，它消除了无线传感器的局限性。 有线系统，并允许更高密度的传感器和/或灵活的测试配置。低数据 带宽、范围问题、有限的电池寿命和较高的成本被发现阻碍了此类系统的采用。 本计画将以低成本无线感测器为核心，开发环境振动测试原型系统 以及结构的系统识别。这将有助于Sensequake开发可持续的解决方案， 土木基础设施的结构健康监测（SHM）和地震评估（例如，建筑物和桥梁）， 通过将开发的系统与现有产品相结合， 这些地区该项目的成功完成也将为加拿大带来重大利益，因为 西部的重大地震危险（例如，不列颠哥伦比亚省）和东部（如魁北克）地区 主要人口中心，全国各地的基础设施老化，状况恶化， 需要定期监测。

Ambient vibration testing is an important tool for identifying the dynamic characteristics of a structure. The industry partner, Sensequake is developing new algorithms and software to predict the integrity of the structure as well as its behavior in response to different type of loadings including earthquakes based on in-situ ambient vibration data. Their technology, 3D-SAM, is a three-dimensional seismic assessment method which can reduce the time for sensor-based assessment of a structure drastically. Traditionally wired sensors (e.g. accelerometers) are used for measuring the vibration response of structure. In a structure, such as a tall building, a wired sensing system becomes cumbersome and it limits the number of sensors and the testing configurations. Wireless sensing system presents a significant opportunity which removes the limitations of a wired system and allows for higher density of sensors and/or flexible test configurations. However, low data bandwidth, range issues, limited battery life and higher cost are found to impede the adoption of such systems. This project will focus on low-cost wireless sensors to develop a prototype system for ambient vibration testing and system identification for structure. This will help Sensequake in developing a sustainable solution for structural health monitoring (SHM) and seismic assessment of civil infrastructure (e.g., buildings and bridges), and by combining the developed system with their existing product could place them in a leadership role in these areas. The successful completion of the project will also bring significant benefits to Canada as there is significant seismic hazard in the western (e.g., British Columbia) and eastern (e.g. Quebec) parts of the country with major population centres, and infrastructure around the country is aged and in a deteriorated state, which needs regular monitoring.