| GNSS PPP海洋平台动态变形监测分析北大核心CSCD |
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| 引用本文： | 熊指南,叶作安,陈实,于丽娜.GNSS PPP海洋平台动态变形监测分析北大核心CSCD[J].测绘通报,2022,0(10):110-113. |
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| 作者姓名： | 熊指南 叶作安 陈实 于丽娜 |
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| 作者单位： | 1. 天津市陆海测绘有限公司, 天津 300191;2. 中海石油环保服务(天津)有限公司, 天津 300450;3. 天津理工大学, 天津 300382 |
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| 基金项目： | 国家重点研发计划(2018YFB1600300) |
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| 摘 要： | 实时监测海洋平台在环境激励下的动态变形对于保障其安全运营有着重要意义。GNSS PPP技术无需设置基站,仅依靠单点监测站便可实现精密单点定位,因而在海洋平台变形监测领域具有潜在的应用价值。针对GNSS PPP信号受背景噪声干扰而精度较低的问题,本文提出改进CEEMDAN算法对GNSS PPP信号降噪,并应用于某海洋平台动态变形监测。结果表明:①GNSS PPP技术结合改进CEEMDAN算法可有效监测海洋平台在环境激励下的动态变形;②改进CEEMDAN可有效去除GNSS PPP背景噪声干扰;③基于降噪后信号可获取监测点清晰的三维位移轨迹,从而为结构安全评估提供参考。
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| 关 键 词： | GNSS PPP 海洋平台 动态变形监测 改进CEEMDAN 信号降噪 |
| 收稿时间： | 2022-08-17 |
| 修稿时间： | 2022-09-01 |
Monitoring and analysis of dynamic deformation of offshore platform using GNSS PPP |
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| XIONG Zhinan,YE Zuoan,CHEN Shi,YU Lina.Monitoring and analysis of dynamic deformation of offshore platform using GNSS PPP[J].Bulletin of Surveying and Mapping,2022,0(10):110-113. |
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| Authors: | XIONG Zhinan YE Zuoan CHEN Shi YU Lina |
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| Institution: | 1. Tianjin Surveying and Hydrography Co., Ltd., Tianjin 300191, China;2. China Offshore Oil Environmental Service (Tianjin) Limited, Tianjin 300450, China;3. Tianjin University of Technology, Tianjin 300382, China |
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| Abstract: | It is of great significance to monitor the dynamic deformation of offshore platforms under environmental excitation in real time to ensure their safe operation. GNSS PPP technology can achieve precise single-point positioning only by relying on single-point monitoring stations, which does not need to set up base station, thus GNSS PPP has potential application value in the field of marine platform deformation monitoring. Aiming at the problem of low accuracy of GNSS PPP monitoring signal interfered by background noise, the improved CEEMDAN algorithm is proposed to filter and denoise the monitoring signa and applied to the dynamic deformation monitoring of an offshore platform. The results show that:① The GNSS PPP technology combined with the improved CEEMDAN can effectively monitor the dynamic deformation of the offshore platform structure. ② The improved CEEMDAN can effectively eliminate the interference of background noise of GNSS PPP. ③ The clear 3D displacement trajectory of the monitoring point can be obtained based on the denoised signal, which can provide references for structural safety assessment. |
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| Keywords: | GNSS PPP offshore platform dynamic deformation monitoring improved CEEMDAN signal denoising |
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