多波束测深仪扫幅宽度评估方法

Assessment Methods to Fun Width of Multibeam Sonar

测量仪器都需要检验,但是仪器的实际性能与厂家标称指标存在差异,单纯按照厂家标称的指标作业会造成意想不到的损失,多波束测深仪也是如此。多波束测深仪扫幅宽度是衡量多波束性能的重要指标,但是由于作业环境复杂,难以通过直接检定方法进行评估。针对这一问题,提出了一种基于水声学原理评估扫幅宽度指标的模型;分析了不同海底底质,使用不同测船对扫幅宽度的影响;研究了扫幅宽度随水深和脉宽的变化规律。并以SeaBat8101为例,对其扫幅宽度进行评估,得出其在不同情况下的扫幅宽度。

Measuring instruments were necessary to be tested, but the actual performance of equipments and manufacturers＇nominal indicators were different. Simply following the manufacturers＇nominal targets would result in unexpected job loss, the same as multi-beam echo sounder. Multi-beam echo sounder fun width was an important indicator of multi-beam, but due to operating the complex environment, it＇ s difficult to be assessed by direct test methods. To solve this problem, a assessment theory of fun width based on acoustic mod- el was proposed, the influence caused by different seabed sediments and different ships was analyzed. The changing regularity caused by depth and pulse was also researched. The last but not the least, taken SeaBat8101 as an example aimed to prove the validity of the assessment method, the fun width of SeaBat8101in different circumstances was assessed by the method.