钢铁材质浮标对ADCP水文监测系统流量测验精度的影响
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摘要
针对钢铁材质浮标的ADCP水文监测系统内置罗经受船磁力影响,导致流向测验出现偏差的问题,通过2009—2011年徐六泾水文站定线比测大、中潮水文测验的实测资料,分析采用垂直于断面的方位角作为流向(流向不修正)和采用断面各垂线实测平均流向作为流向(流向修正)两种情况下钢铁材质浮标对ADCP水文监测系统流量测验精度和流量、潮量计算的影响。结果表明:无论是否修正流向,计算得到涨落潮流量、潮量以及全潮下泄潮量和走航式ADCP定线比测的实测资料相比,误差均较小,精度都很高;在流量和潮量计算时,可以对钢铁材质浮标ADCP流向不做修正。
The inner compass of the acoustic Doppler current profiler( ADCP) hydrological monitoring system with steel buoys is affected by a ship's magnetism,which leads to deviation of the measured flow direction. Based on data measured at Xuliujing Hydrological Station during the spring tide and middle tide from 2009 to 2011,the effects of steel buoys on the flow measurement accuracy of an ADCP flow measurement system and the calculation results of discharge and tidal volume were investigated under the conditions when the angle perpendicular to the cross-section was used as the flow direction( without flow direction correction) and when the measured mean flow direction of the verticals on the cross-section was used as the flow direction( with flow direction correction). The results show that,compared with the data measured with the vessel-mounted ADCP,the discharge and tidal volume of flood tides and ebb tides and the sum of tidal volume show small errors and high precision,whether the flow direction is corrected or not. It is concluded that the flow direction of the ADCP system with steel buoys can be uncorrected in the calculation of discharge and tidal volume.
The inner compass of the acoustic Doppler current profiler( ADCP) hydrological monitoring system with steel buoys is affected by a ship's magnetism,which leads to deviation of the measured flow direction. Based on data measured at Xuliujing Hydrological Station during the spring tide and middle tide from 2009 to 2011,the effects of steel buoys on the flow measurement accuracy of an ADCP flow measurement system and the calculation results of discharge and tidal volume were investigated under the conditions when the angle perpendicular to the cross-section was used as the flow direction( without flow direction correction) and when the measured mean flow direction of the verticals on the cross-section was used as the flow direction( with flow direction correction). The results show that,compared with the data measured with the vessel-mounted ADCP,the discharge and tidal volume of flood tides and ebb tides and the sum of tidal volume show small errors and high precision,whether the flow direction is corrected or not. It is concluded that the flow direction of the ADCP system with steel buoys can be uncorrected in the calculation of discharge and tidal volume.
引文
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[13]刘桂平,徐华,王珏.长江口北支河段全潮水文测验水通量平衡计算方法[J].河海大学学报(自然科学版),2013,41(5):405-409.(LIU Guiping,XU Hua,WANG Jue.Water balance calculation method for hydrological observations during a tidal period in north branch of Yangtze Estuary[J].Journal of Hohai University(Natural Sciences),2013,41(5):405-409.(in Chinese))
[2]刁新源,于非,葛人峰,等.船载ADCP测量误差的因素分析和校正方法[J].海洋科学进展,2006,24(4):552.(DIAO Xinyuan,YU Fei,GE Renfeng,et al.Factor analysis and correction method of shipboard ADCP measuring error[J].Advances in Marine Science,2006,24(4):552.(in Chinese))
[3]张美富,刘大伟,王真祥,等.基于GPS罗经的感潮河段ADCP测验精度研究[J].现代测绘水文,2010,33(6):34.(ZHANG Meifu,LIU Dawei,WANG Zhenxiang,et al.Research on precision of ADCP discharge measurement using GPS compass in tide reach[J].Modern Surveying and Mapping,2010,33(6):34.(in Chinese))
[4]李占桥,吴宝勤,任来平,等.铁质船体对磁罗经海流计流向影响分析[J].海洋测绘,2012,32(4):60-62.(LI Zhanqiao,WU Baoqin,REN Laiping,et al.Analysis on flow direction influence from iron hull to magneticcompass current meter[J].Hydrographic Surveying and Charting,2012,32(4):60-62.(in Chinese))
[5]李发.磁罗经为什么要校正[J].天津航海,1995(1):9-10.(LI Fa.Why magnetic compass calibration[J].Tianjin Maritime,1995(1):9-10.(in Chinese))
[6]邵海桂.获取磁罗经差的方法分析[J].中国水运,2011,11(12):88-89.(SHAO Haigui.Obtain the magnetic compass error analysis of the method[J].China Water Transport,2011,11(12):88-89.(in Chinese))
[7]陈力平,方波,季成康.应用GPS技术修正ADCP测量误差[J].人民长江,2002,33(1):36-37.(CHEN Liping,FANG Bo,JI Chengkang.Application of GPS to correct ADCP measurement Error[J].Yangtze River,2002,33(1):36-37.(in Chinese))
[8]彭万兵,官学文,赵东,等.ADCP与GPS在内河流态测量中的应用问题及对策[J].地理空间信息,2004,2(5):42-44.(PENG Wanbing,Guan Xuewen,ZHAO Dong,et al.Application of combined ADCP and GPS yechniques to inner river flowpattern[J].Geospatial Information,2004,2(5):42-44.(in Chinese))
[9]邹华,彭勤建,刘强,等.光纤陀螺罗经辅助ADCP导航方法研究[J].舰船电子工程,2008,28(3):73-75.(ZOU Hua,PENG Qingjiang,LIU Qiang.Fiber optic gyro compass aided ADCP navigation methods[J].Ship Electronic Engineering,2008,28(3):73-75.(in Chinese))
[10]韩伯成,霍中元,陈斌,等.走航式ADCP在流量测验中的应用[J].水利水电科技进展,2008,28(增刊1):154-155.(HAN Bochen,HUO Zhongyuan,CHEN Bin.Navigation type application of ADCP in flow test[J].Advances in Science and Technology of Water Resources,2008,28(Sup1):154-155.(in Chinese))
[11]张红梅,陈志高,赵建虎,等.基于集成外部传感器的ADCP精确测量方法研究[J].武汉大学学报(信息科学版),2016,41(8):1131-1136.(ZHANG Hongmei,CHEN Zhigao,ZHAO Jianhu,et al.ADCP integration measurement based on external sensor[J].Geomatics and Information Science of Wuhan University,2016,41(8):1131-1136.(in Chinese))
[12]杜亚南,李保.长江河口和密西西比河河口水文测验工作比较[J].水文,2012,32(6):57-58.(DU Yanan,LI Bao.The Yangtze estuary and the Mississippi River estuary hydrological comparison research and enlightenment[J].Journal of China Hydrology,2012,32(6):57-58.(in Chinese))
[13]刘桂平,徐华,王珏.长江口北支河段全潮水文测验水通量平衡计算方法[J].河海大学学报(自然科学版),2013,41(5):405-409.(LIU Guiping,XU Hua,WANG Jue.Water balance calculation method for hydrological observations during a tidal period in north branch of Yangtze Estuary[J].Journal of Hohai University(Natural Sciences),2013,41(5):405-409.(in Chinese))