National Center of Metrization for Equipments of Roads and Bridges, Research Institute of Highway Ministry of Transport, Beijing 100088, China.
School of Electrical and Information Engineering, Wuhan Institute of Technology, Wuhan 430205, China.
Sensors (Basel). 2020 Jan 24;20(3):658. doi: 10.3390/s20030658.
Deformation is a ubiquitous phenomenon in nature. This process usually refers to the change in shape, size, and position of an object in the time and spatial domain under various loads. Under normal circumstances, during engineering construction, technicians are generally required to monitor the safe operation of structural facilities in the transportation field and the health of bridge, because monitoring in the engineering process plays an important role in construction safety. Considering the reliability risk of sensors after a long-time work period, such as signal drift, accurate measurement of strain gauges is inseparable from the value traceability system of high-precision strain gauges. In this study, two vibrating wire strain gauges with the same working principle were measured using the parallel method at similar positions. First, based on the principle of time series, the experiment used high-frequency dynamic acquisition to measure the thermometer strain of two vibrating wire strain gauges. Second, this experiment analyzed the correlation between strain and temperature measured separately. Under the condition of different prestress, this experiment studied the influencing relationship of temperature corresponding variable. In this experiment, the measurement repetitiveness was analyzed using the meteorology knowledge of single sensor data, focused on researching the influence of temperature and prestress effect on sensors by analyzing differences of their measurement results in a specified situation. Then, the reliability and stability of dynamic vibrating wire strain gauge were verified in the experiment. The final conclusion of the experiment is the actual engineering in the later stage. Onsite online meteorology in the application provides support.
变形是自然界中普遍存在的现象。这个过程通常是指在各种载荷下，物体在时空中的形状、大小和位置的变化。在工程建设中，通常要求技术人员监测运输领域结构设施的安全运行和桥梁的健康状况，因为在工程过程中的监测对施工安全起着重要作用。考虑到长时间工作后传感器的可靠性风险，例如信号漂移，应变计的精确测量离不开高精度应变计的数值可追溯性系统。在本研究中，使用平行法在相似位置测量了两个具有相同工作原理的振弦应变计。首先，基于时间序列原理，实验使用高频动态采集来测量两个振弦应变计的温度计应变。其次，该实验分析了单独测量的应变和温度之间的相关性。在不同预应力条件下，研究了温度对应变量的影响关系。在该实验中，使用单个传感器数据的气象学知识分析了测量重复性，重点研究了在特定情况下分析其测量结果的差异，以研究温度和预应力效应对传感器的影响。然后，在实验中验证了动态振弦应变计的可靠性和稳定性。实验的最终结论为后期的实际工程提供了支持。在应用中，现场在线气象学提供了支持。
