Abstract
Recovery of underwater drowned human body is one of the major missions of the firefighters. However, due to short of man power, lack of training and professional equipments, this kind of body recovery mission was basically conducted on the shore and at the water surface. Only a limited amount (if any) of diving activities were conducted to search for the drowned body. For a much more efficient way to conduct this kind of body recovery activity, it is necessary to incorporate the state of the art of the underwater acoustics technique, such as scanning sonar, into the operation procedures.
Underwater stationary targets are objects sitting on the seafloor that can¡¦t move autonomously. Apparatus feasible for the detection of these underwater stationary targets includes: optics, acoustics and geophysical instruments. Among them, acoustical apparatus is the most feasible one.
The purpose of this research was to investigate the application of scanning sonar for underwater human body detection and recovery. Based on theoretical considerations, the use of scanning sonar can improve both total time consumed and target detection rate of body recovery rescue activities. Three real cases which incorporated this equipment into the rescue work illustrated that the movement of a diver, several suspected targets and the morphological features around the targets can be recognized by the scanning sonar. In addition, the dimensions, shapes, amount and geographic locations of the targets can be identified for further considerations. During the mission at the Jih-Yueh-Tan Reservoir, it was proved indirectly that the scanning sonar can detect the drowned human body successively.
Based on this investigation, it is recomended that the detection and identification ability of the scanning sonar can be dramatically improved if optical apparatus such as ROV (remotely operated vehicle) or TOV (towed operated vehicle) was incorporated into the operation procedures.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0828109-110449 |
| Date | 28 August 2009 |
| Creators | Lin, I-Ting |
| Contributors | Shiau-Yun Lu, Wen-Miin Tian, Yang-Chi Chang, Yi-Ching Chen, Yuan-I Li |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0828109-110449 |
| Rights | unrestricted, Copyright information available at source archive |
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