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 提案：0222468 Bowen, Andrew 0222432 PI 建议升级 DSL-120 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。这项工作要完成的主要任务是： 1）提高系统的信噪比，以增强从基本声纳系统中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计程仪（DVL）之间的声学​​干扰，该干扰阻碍了两个系统的同时操作。无法使用 DVL 会导致声纳勘测中的导航数据退化，特别是对于覆盖太大而无法连续转发器导航的勘测。由于 DVL 对外部触发的响应存在较长且可变长度的延迟，因此在升级期间同步两个声纳的尝试未成功。 3) DSL-120A系统的测深声纳能力将得到改进，以提高小尺度特征的分辨率，使其更接近反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，这些部分同时到达声纳传感器 - 也就是说，与拖车的距离相同。在平坦的底部，最靠近车辆的海底部分就是这种情况；在地势较高的地区，这种情况可能发生在绘制的测绘带的任何部分。多波束声纳结合了来自数十个水听器的信号，可以合成抑制相邻反射的窄波束，从而在这些情况下大大改善水深测量。将添加使用 DSL-120A 声纳系统操作 SM2000 的功能。多波束系统将与 DVL 和侧扫/测绘测深声纳同步，因此所有三个声学传感器可以同时使用。拟议的改进将完成 DSL-120A 声纳系统所有必需传感器和功能的全面集成。这些改进将提高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 近海底多波束数据的潜力，以提高使用 DSL-120A 获取的测深数据的质量声纳。