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熊木地, 于兆辉, 何颖秋.船舶吃水检测系统的数据处理研究水资源与水工程学报[J].,2019,30(3):160-164
船舶吃水检测系统的数据处理研究
Research on data processing for ship draft detection system
  
DOI:10.11705/j.issn.1672-643X.2019.03.24
中文关键词:  扫式船舶吃水检测系统  动态压力补偿; 中值滤波; 最小二乘法; 船舶尾流噪声
英文关键词:the ship draft detection system in pitch-up setting  dynamic pressure compensation  median filtering  the least squares method  the ship stern's noise
基金项目:辽宁省百千万人才工程项目(2012921080); 中国海事局科技专项基金项目(0716-13400003N008)
作者单位
熊木地, 于兆辉, 何颖秋 (大连海事大学 辽宁 大连 116026) 
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中文摘要:
      开发了一套仰扫式船舶吃水检测系统,采用超声波阵列扫描测距方法实现通航船舶三维动态吃水数据检测。系统安装在趸船上,受风浪和水流的影响,趸船的摆动将影响检测系统的稳定性,同时检测结构架在水下的挠度变化亦会影响系统的测量精度。为解决以上问题,采用动态压力补偿算法对系统数据进行实时补偿,采用中值滤波算法对数据中的随机噪声进行处理,通过最小二乘法对船舶吃水深度进行直线拟合,消除尾流噪声的影响,最终得到船舶吃水深度。采用模拟实验数据对系统进行测试,结果证明数据补偿算法快速有效。现场实船测试表明,系统检测精度满足要求。
英文摘要:
      This paper develops a set of ships draft detection system in pitch-up setting, adopting the method of distance measurement with ultrasonic sensor array to achieve the ships 3D draft dynamic testing. The system is installed on the pontoon; therefore, the swinging of the pontoon will affect the stability of the detection system due to the wind and waves and water flow situation, and the deflection change of structure frame under water will also affect the measurement accuracy of the system. In order to solve the above problems, the system uses dynamic pressure compensation algorithm to compensate the system data in real time. The random noise in the data can be processed by median filtering algorithm. The least square method is used to fit the depth of the ship's draught, the influence of ship stern's noise is eliminated, and the depth of the ship's draught is finally obtained. The algorithm has been verified by experimental data, and the results show that this algorithm is fast and effective. The on-site ship test shows that the accuracy of the system meets the requirements.
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