双轴扫描声呐在桥墩冲刷监测中的应用  

Application of Dual axis scanning sonar in Bridge Pier Scouring

作　　者：张龙 隋海琛[1,2] 孙辉 崔志伟 ZHANG Long;SUI Haichen;SUN Hui;CUI Zhiwei(Tianjin Research Institute for Water Transport Engineering,M.O.T.,Tianjin 300456,China;Tianjin Key Laboratory of Surveying and Mapping for Water Transport Engineering,Tianjin Survey and Design Institute for Water Transport Engineering,Tianjin 300456,China)

机构地区：[1]交通运输部天津水运工程科学研究所,天津300456 [2]天津水运工程勘察设计院有限公司天津市水运工程测绘技术重点实验室,天津300456

出　　处：《自动化与仪器仪表》2024年第4期266-270,共5页Automation & Instrumentation

基　　金：国家重点研发计划(2018YFC0810400);中央级公益性科研院所基本科研业务费专项资金项目(TKS20220104、TKS20220303)。

摘　　要：针对潜水探摸费用高、作业时间受限,传统光栅监测不直观及多波束测深监测在实时性连续性上存在缺陷,采用定点静态监测方法,将两台双轴扫描声呐设备固定安装在指定桥墩上,声呐探头以一定的水平角度和垂直角度步进旋转,在水平、垂直旋转指定角度区间形成一幅完整的三维点云图像。采集的数据由串口服务器转为网络数据后通过4G DTU远程传输给数据接收终端进行处理、汇总、分析、成图、显示。通过软硬件集成系统实现大范围、长时间、高频次、高精度的无人值守冲刷监测,避免了探头中途拆装等操作对前后所测数据的一致性产生的可能影响。同时,固定安装的声呐系统克服了其他监测手段数据不直观、不及时等缺陷,可按照指定时间获取面状的全覆盖海底地形数据,对桥墩周边海床基础数据进行实时冲刷监测,监测系统运行稳定,远程采集控制及回传数据正常,数据精度可达0.1 m,数据点密度可达1 m×1 m。数学模型对冲刷坑的冲刷深度和范围与实测值相比,结果吻合。In view of the high cost of diving exploration,limited operation time,unintuitive grating monitoring and defects in real-time continuity of multi-beam sounding monitoring,this paper adopts fixed-point static monitoring method to install two two-axis scanning sonar devices on designated piers,and the sonar probes rotate step by step at a certain horizontal Angle and vertical Angle.A complete three-dimensional point cloud image is formed by rotating the specified Angle interval horizontally and vertically.The collected data is converted from serial port server to network data and then remotely transmitted to the data receiving terminal through 4G DTU for processing,summary,analysis,mapping and display.The software and hardware integrated system can realize a large range,long time,high frequency and high precision unattended scour monitoring,and avoid the possible impact of the probe disassembly and installation on the consistency of the measured data before and after.At the same time,the fixed installation of sonar system overcomes the defects of other monitoring means such as unintuitive and untimely data,and can obtain the full coverage of the seabed topography data in the form of plane according to the specified time,and carry out real-time erosion monitoring of the seabed basic data around the pier.The monitoring system runs stably,the remote collection and control and the return data are normal,and the data accuracy can reach 0.1 m.The data point density can reach 1 m×1 m.

关 键 词：桥墩冲刷 局部冲刷 双轴扫描声呐 监测系统 杭州湾大桥 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]