Collaborative Research: Improving the DSL-120A Sonar Mapping System

合作研究：改进 DSL-120A 声纳测绘系统

• 批准号: 0222432
• 负责人: Andrew Bowen
• 金额: $ 4.44万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-09-01 至 2004-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0222432&HistoricalAwards=false
• 关键词: Collaborative; Research; Improving; DSL; 120A

P.I. Rognstad, Mark Proposal: 0222468 Bowen, Andrew 0222432The PIs propose to upgrade the DSL-120 sonar mapping system and resolve problems related to the integration of DSL-120A sensors and capabilities. Primary tasks to be completed as part of this work are: 1) Improvement of the signal to noise ratio of the system to enhance the ability to extract useful phase-bathymetry data from the basic sonar system. 2) The PIs will resolve the acoustic interference between the sidescan sonar and the Doppler velocity log (DVL), which has prevented the simultaneous operation of both systems. The inability to use the DVL results in sonar surveys with degraded navigation data, particularly for surveys covering areas too large for continuous transponder navigation. Attempts to synchronize the two sonars during the upgrade were unsuccessful, due to long and variable length latency in the response of the DVL to external triggering. 3) Bathymetric sonar capabilities of the DSL-120A system will be improved to enhance resolution of small-scale features closer to the resolving capabilities of the backscatter imagery. Phase bathymetric sonars like the DSL-120A cannot distinguish acoustic reflections from different parts of the seafloor that arrive at the sonar transducers at the same time - that is, that are the same distance from the tow vehicle. Over a flat bottom, this will be the case for that part of the seafloor closest to the vehicle; in areas with high relief, this can happen in any part of the mapped swath. Multibeam sonar, which combines signals from dozens of hydrophones, can synthesize narrow beams that reject adjacent reflections, giving greatly improved bathymetry in these situations. The capability to operate the SM2000 with the DSL-120A sonar system will be added. The multi-beam system will be synchronized with both DVL and sidescan/swath bathymetry sonars, so all three acoustic sensors may be used simultaneously. The proposed improvements will complete the full integration of all the requisite sensors and capabilities of the DSL-120A sonar system. These improvements will improve signal quality of the backscatter and phase-bathymetric sonar, improve navigation through the use of the DVL, and offer the potential for collection of SM2000 near-bottom multibeam data to improve the quality of bathymetric data acquired using the DSL-120A sonar.

P.I.Rognstad，Mark Proposal：0222468 Bowen，Andrew 0222432私人投资者建议升级DSL-120型声纳测绘系统，并解决与DSL-120A传感器和功能集成相关的问题。作为这项工作的一部分，将完成的主要任务是：1)改善系统的信噪比，以增强从基本声纳系统提取有用的相位测深数据的能力。2)PI将解决侧扫声纳和多普勒速度测井(DVL)之间的声学干扰，这阻碍了两个系统的同时运行。不能使用DVL会导致导航数据退化的声纳测量，特别是对于覆盖区域太大而无法连续应答器导航的测量。在升级期间同步两个声纳的尝试不成功，原因是DVL对外部触发的响应延迟较长且长度可变。3)将改进DSL-120A系统的测深声纳能力，以提高小尺度特征的分辨率，使其更接近后向散射图像的分辨率。像DSL-120A这样的相位测深声纳无法区分来自海底不同部分的声反射，这些声反射同时到达声纳换能器--也就是说，与拖车的距离相同。在平底上，这将是最接近车辆的海底部分的情况；在地形高度较高的区域，这种情况可能发生在地图上的条带的任何部分。多波束声纳结合了几十个水听器的信号，可以合成拒绝相邻反射的窄波束，在这些情况下大大改进了水深测量。将增加使用DSL-120A声纳系统操作SM2000的能力。多波束系统将与DVL和侧扫/条带测深声纳同步，因此所有三个声学传感器都可以同时使用。拟议的改进将完成DSL-120A声纳系统所有必要传感器和能力的完全集成。这些改进将改善后向散射和相位测深声纳的信号质量，通过使用DVL改进导航，并提供收集SM2000近底多波束数据的潜力，以提高使用DSL-120A声纳获取的测深数据的质量。