基于磁通测量的大坝水平位移监测方法研究
Research on horizontal displacement monitoring method for dams based on magnetic flux measurement
房宽达 1张继楷 2姚孟迪 3于琦 1高潮1
作者信息
- 1. 中国长江三峡集团有限公司,湖北 武汉 430010
- 2. 长江科学院 工程安全与灾害防治研究所,湖北 武汉 430010
- 3. 中国三峡建工(集团)有限公司,北京 101100
- 折叠
摘要
垂线测量技术简单有效,因而在大坝水平位移监测中得到了广泛应用,然而面对大坝高湿、高粉尘的监测环境,传统监测方法均有一定局限性.为此,提出了一种基于磁通测量的大坝水平位移监测方法,从磁通量不受非铁磁性介质影响的原理出发,通过构建合适的磁路,以磁通量作为媒介,将位移变化转换为磁传感器的电压变化.根据实际需求设计了一种差分式磁通测量传感器以减弱背景磁场的影响,采用迭代标定的数据拟合方法提高拟合精度.结合理论分析及室内实验,开发了适用于高湿度、高粉尘环境的磁通测量垂线坐标仪,实现了0.1 mm的精度,并在白鹤滩水电站开展应用测试.实验及现场使用结果表明,基于磁通测量的大坝水平位移监测方法可行,磁通测量垂线坐标仪在水电站现场运行状况良好.
Abstract
Vertical line measurement technology has been widely used in dam horizontal displacement monitoring because of its simplicity and effectiveness.However,facing the high humidity and high dust monitoring environment,traditional monitoring meth-ods have certain limitations.Therefore,a method of dam horizontal displacement monitoring based on magnetic flux measurement was proposed.In this method,based on the principle that magnetic flux is not affected by non-ferromagnetic medium,taking mag-netic flux as medium,the displacement change was converted into the voltage change of magnetic sensor by constructing appropri-ate magnetic circuit.According to the actual demand,a differential flux measurement sensor was designed to weaken the influence of background magnetic field,and the data fitting method of iterative calibration was used to improve the fitting accuracy.Com-bined with theoretical analysis and laboratory test,a magnetic flux measurement vertical coordinate instrument suitable for high hu-midity and high dust environment,with an accuracy of 0.1 mm,was developed,and then was used in Baihetan Hydropower Sta-tion.The experimental and field application results showed that the method of dam horizontal displacement monitoring based on magnetic flux measurement was feasible,and the magnetic flux measurement vertical coordinate instrument is in good operation at the site of hydropower stations.
关键词
磁通测量/水平位移/安全监测/霍尔传感器/高湿度Key words
magnetic flux measurement/horizontal displacement/safety monitoring/Hall sensor/high humidity引用本文复制引用
基金项目
国家自然科学基金青年基金项目(52209153)
中国长江三峡集团有限公司科研项目(202103471)
中国三峡建工(集团)有限公司科研项目(JGAJ0302222001)
出版年
2024
国家科技期刊平台
NSTL
万方数据