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題 名 | 以聲納束寬概念為基礎的測深資料處理=The Processing of Echo-Sounding Data Based on the Concept of Finite Beam-Width |
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作 者 | 張逸中; 溫進丁; 黃煌輝; | 書刊名 | 港灣技術 |
卷 期 | 13 1998.01[民87.01] |
頁 次 | 頁59-70 |
分類號 | 351.923 |
關鍵詞 | 聲納; 束寬; |
語 文 | 中文(Chinese) |
中文摘要 | 目前一般的水深資料處理仍以聲納路徑為單一波線的概念為基礎,在此假設下各個測深值是互不相關的獨立事件。但事實上多數的測深過程中,聲納音束在空間中重疊的比例甚高,並非完全的獨立事件。本文以此概念為基礎,重新解讀測深值的物理意義,並據此設計了一個可辨認異常值及修正斜坡誤差的自動化處理程序。與單一波線觀念最大的不同是我們從各測深值所代表的波束空間重疊之中,可以得到相鄰波束提供的交互資訊,對真實的水深作更合理的推論。此項處理程序除經數值模擬驗證其正確性外,也已運用於本所的實測資料,有效的提高了資料處理的自動化程度。 |
英文摘要 | The traditional data processing of the echo-sounding data are based on an assumption that the ray path of sound is vertically going down and reflected back to the sonar along the same path. The above assumption makes each datum be an event of totally independent with the others. However, it is not true because the sonar is actually have a finite beam-width and the false assumption does induce some data distortion. In this paper, all the echo-sounding data are re-interpreted as sonar beams with certain beam-width. The benefits of this processing include (1) the data distortion on the slope can be corrected reasonably to some extent; (2) most of the abnormal data caused by suspended bodies and ship rolling (or pitching) can be recognized. The main difference between the new assumption and the single ray approach we used before is that the new one can extract the information from the overlapped sonar beams, which is basically impossible for the old assumption. |
本系統中英文摘要資訊取自各篇刊載內容。