双频识别声呐在浑浊海域ROV海管调查中的应用

【目的】为解决混浊海域ROV海管调查遇到的困难,引入双频识别声呐协助作业。【方法】在中国南海某浑浊海域ROV海管调查作业中,搭载双频识别声呐,对整段海管、特征点进行声学成像,同时与ROV搭载光学摄像头成像进行对比。【结果】在浑浊海域海管调查应用中,双频识别声呐可以在ROV搭载光学摄像头无法成像的情况下声学成像,生成几乎等同影像质量的图像。【结论】作为一种目视检查手段,ROV搭载双频识别声呐可以清楚地观察海管的状态,实时呈现动态画面,有效地协助作业人员在浑浊海域进行ROV海管调查,极大地提高了作业的安全,保证了作业质量;而且,ROV搭载双频识别声呐在浑浊海域海管调查时的速度不亚于在能见度良好海域中的调查速度,保证了其作业效率和经济性。

Application of Dual-Frequency Identification Sonar in the Pipeline Inspection with ROV in Poor Visibility Seawater

[Objective] To solve the difficulties of the ROV pipeline survey in poor visibility seawater,Dual-Frequency Identification Sonar was used to assist operations.[Methods] ROV equipped with Dual-Frequency Identification Sonar conducted pipeline survey to record real-time acoustic video for the pipeline and feature points.Meanwhile,imaging by optical camera fixed on ROV was also recorded to compare.[Results] Through analysis of application example of pipeline inspection in poor visibility seawater,it was found that Dual-Frequency Identification Sonar could present high quality of imaging where optics camera could not work and generate images that were almost equivalent to image quality.[Conclusion] The real-time dynamic images appearing in front of inspectors assist them to take the pipeline ROV inspection effectively in low-light seawater conditions,greatly improve the safety of operations and ensure the quality.Meanwhile,as a method of visual inspection,Dual-Frequency Identification Sonar can show the state of subsea pipeline clearly,ensuring the quality of the inspection.According to the actual operation process,the speed of ROV inspection with Dual-Frequency Identification Sonar in poor visibility seawater is no less than that in good visibility condition which keeps the operational efficiency and economy of ROV pipeline inspection.