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| 摘要: |
| 船舶“超吃水冶引起的船舶搁浅事故呈逐年增多的趋势,对内河离港船舶吃水进行实时测量尤为必要. 针
对内河航道的特点,提出了一种利用单波束声收发分体传感器同步对船舶底部边缘进行扫描测量的方法,研究
了传感器系统构成,并对测量原理进行了理论推导. 设计了比尺为1100 的吃水测量试验系统,利用3 000 t级
小比尺船模按4 种工况进行试验,结果表明,船舶航速对船舶吃水测量值有一定影响,但最大误差仍控制在
11. 4%以内,证明了这种测量方法的可行性. |
| 关键词: 内河 船舶 声呐 扫描 吃水 检测 |
| DOI： |
| 分类号: |
| 基金项目:重庆市自然科学基金资助项目(No郾2010BB4275) |
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| Research on detection method for ship's draft measurement |
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| Abstract: |
| As ship grounding accidents caused by “super draft”are increasing year by year, it is particularly necessary to measure draft of inland departing vessels by real time measurement. According to the characteristics of
inland waterways and ships, a novel method for ship draft real-time measurement by using simultaneous scanning
sonar is proposed. As the draft depth measurement benchmarks, the accuracy of water surface line is directly
related to the final measurement accuracy, so firstly the water surface line extraction method based on statistical
analysis is presented. Then the influence of sonar's size on output signals is deeply analyzed, and then the
measuring principle is deduced. To prove these theoretical analysis results, the ship draft measurement system of a
small scale is developed, and the tests are carried out at the same time. The results show that with the increase of
ship speed, the measured error of the ship draft is of increasing tendency with the minimum error being -4. 2%,
and the maximum -11. 4%. The test results prove the feasibility of the program, and also show a greater impact on
the ship draft with the increase of ship speed. In the following reseaches on the influence caused by acoustic
scattering, diffraction and other effects must be studied to improve detection accuracy. |
| Key words: inland river ship sonar scan draft detect |
