| 多波束测量边缘波束测深精度分析与评估 |
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| 引用本文： | 史青法.多波束测量边缘波束测深精度分析与评估[J].海洋测绘,2018(6):25-28. |
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| 作者姓名： | 史青法 |
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| 作者单位： | 天津市陆海测绘有限公司,天津 300304 |
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| 摘 要： | 根据多波束测深系统边缘波束采集的异常数据云图,判别分析多波束测深系统的各误差源对边缘波束测深的影响,从理论上探讨声线折射所引起的测深误差与边缘波束角之间的关系,通过多波束测深工程实例的精度验证,结果表明:换能器安装的牢固程度和校准精度、测船定位和姿态改正与测深的时间同步性,对边缘波束的测深精度影响较大;声线剖面误差使得中央波束和边缘波束的测深偏浅或偏深,各波束的测深误差曲线呈现"哭脸"状或"笑脸"状,但对于各波束测深的综合精度,中央波束精度相对较高,两侧边缘波束精度相对较低。
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| 关 键 词： | 多波束测深 中央波束 边缘波束 测深精度 误差分析 |
Analysis and Evaluation of the Depth Accuracy of Edge Beam in Multi-beam Sounding |
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| SHI Qingfa.Analysis and Evaluation of the Depth Accuracy of Edge Beam in Multi-beam Sounding[J].Hydrographic Surveying and Charting,2018(6):25-28. |
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| Authors: | SHI Qingfa |
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| Institution: | Tianjin Surveying and Hydrography Co.,Ltd.,Tianjin 300304 ,China |
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| Abstract: | According to the abnormal data cloud pictures of edge beam,the effects of error sources on the depth accuracy of edge beam in multi-beam sounding are distinguished and analyzed.The relationship between the sounding error caused by acoustic ray refraction and the angle of edge beam is discussed theoretically.The depth accuracy in the project example of multi-beam sounding is verified.The results show that on the depth accuracy of edge beam,there are more effects of transducer installation firmness and its calibration precision,and timesynchronization of positioning,attitude correction with sounding.Acoustic profile error makes the soundings of central beam and edge beam shallower or deeper.The sounding error curve of multi-beam is like a "crying face" or a "smiling face".The synthetic accuracy of central beam sounding is higher than that of edge beam sounding. |
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