模擬深海采礦混響環境實驗裝置研究

郝奇; 趙海鳴; 姬雅倩; 王艷麗

doi:10.13374/j.issn2095-9389.2017.05.002

模擬深海采礦混響環境實驗裝置研究

doi: 10.13374/j.issn2095-9389.2017.05.002

郝奇¹,
趙海鳴^1,2, ,,
姬雅倩¹,
王艷麗¹

1) 中南大學機電工程學院, 長沙 410083
2) 中南大學高性能復雜制造國家重點實驗室, 長沙 410083

基金項目:

國家自然科學基金資助項目（51374245）；中南大學中央高校基本科研業務費專項資金資助項目（2015zzts196）

詳細信息

中圖分類號: TB566
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出版歷程
- 收稿日期: 2016-07-12

Experimental device for simulating reverberation environment in deep sea mining

1) College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China
2) State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China

摘要

摘要: 針對真實深海采礦環境下實時微地形超聲探測聲信號獲取難的問題，設計并建立了一套能模擬真實深海采礦混響環境的超聲探測實驗系統.在對螺旋采掘頭結構簡化的基礎上，利用Fluent模擬了螺旋采掘頭與多組葉輪模型對水下流場的影響，對二者所得的水下流場進行比較后，確定所選葉輪模型能較好地反映真實采礦環境.隨后針對葉輪模型，實驗測量了泥沙垂向濃度分布，驗證了設計模型的正確性.最后進行超聲探測實驗，結果表明，懸浮泥沙不僅對聲波產生黏滯和吸收，而且會產生嚴重的混響干擾，通過該超聲探測系統的時間增益補償，可有效抑制混響干擾，增加目標檢測概率.本項研究為深海采礦混響環境下的超聲微地形探測提供了研究基礎.
- 深海采礦 /
- 實驗系統 /
- 模擬采礦環境 /
- 超聲探測 /
- 鈷結殼
Abstract: To solve the difficult problem of ultrasonic signal acquisition with respect to real-time tiny terrain detection in the deep-sea mining environment, an experimental ultrasonic detection system was designed and built that can simulate the real deep-sea mining reverberation environment. Using a simplified structure for the spiral mining head as a basis, Fluent software was used to simulate the impact of a spiral mining head and a multiple-impeller on the underwater flow field. A comparison of the results shows that the impeller model can realistically reflect the mining environment. Then, based on the impeller model, the vertical distribution of the sediment volume fractions is experimentally determined and the correctness of the design model is verified. Finally, an ultrasonic detection experiment is conducted and the results show that suspended sediment can generate viscosity and absorb sound waves, thereby causing serious reverberation interference. By implementing time-gain compensation in the ultrasonic detection system, the reverberation interference can be effectively suppressed and the probability of target detection increases. The results of this study provide a basis for studying ultrasonic microtopography detection in the deep sea mining reverberation environment.
- deep-sea mining /
- experiment system /
- simulated mining environment /
- ultrasonic detection /
- cobalt crust

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參考文獻(7)

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