基于光纤传感技术的人字门结构健康监测研究与应用

Research and application of health monitoring of herringbone gate structurebased on optical fiber sensing technology

摘要:

针对船闸人字门长期处于低速重载、超负荷运行的复杂水域环境下,现有检测手段自动化程度低、耗时耗力、易受电磁干扰等问题,提出了基于光纤光栅传感技术的人字门结构健康监测系统。首先阐述了光纤光栅传感原理；然后基于该原理构建了人字门结构健康监测系统,该系统可以感知人字门在运行过程中的应变变化情况,实现了实时数据展示、异常数据监测预警、历史数据回放等功能；最后,针对传感器采集到的数据进行中值滤波处理,提高信号的信噪比。选取典型数据进行分析对比,验证了传感器的重复性及通航关联性,为船闸人字门的安全、稳定工作提供了数据支撑。

Abstract:

In view of the problems that the miter gate of ship lock is in the complex water environment of low-speed, heavy-duty and overload operation for a long time, the existing detection methods have low degree of automation, time-consuming and labor-consuming, and are vulnerable to electromagnetic interference, a miter gate structural health monitoring system based on fiber Bragg grating sensing technology is proposed. Firstly, the sensing principle of fiber Bragg grating is described; Then, based on this principle, the structural health monitoring system of miter gate is constructed. The system can sense the strain changes of miter gate during operation, and realize the functions of real-time data display, abnormal data monitoring and early warning, historical data playback and so on; Finally, the data collected by the sensor is processed by median filter to improve the signal-to-noise ratio of the signal. The data are analyzed and compared to verify the repeatability and navigation relevance of the sensor data, which provides data support for the safe and stable work of the miter gate of the ship lock.