【摘要】：針對港口疏浚駁船存在違規(guī)拋泥現(xiàn)象,提出一非接觸式檢測方案,以Chirp信號作為探測信號,利用希爾伯特黃變換提取探測信號成分,進(jìn)而獲取信號特定頻段的能量熵特征.通過對"無拋泥"和"拋泥"兩種狀態(tài)下的接收信號進(jìn)行分析,得到兩者希爾伯特邊際譜的能量熵具有明顯的差異,以此作為疏浚駁船拋泥行為的檢測.在不同場景條件下進(jìn)行大量的數(shù)據(jù)仿真分析發(fā)現(xiàn),無拋泥情況下誤檢概率0%,拋泥情況下漏檢概率在6%以下,該方案具有良好的穩(wěn)定性和可行性.
[Abstract]:In view of the phenomenon of illegal dredging barges in port, a non-contact detection scheme is proposed, in which the Chirp signal is used as the detection signal and the Hilbert Huang transform is used to extract the detection signal components, and then the energy entropy characteristics of the specific frequency band of the signal are obtained. By analyzing the received signals of "no mud" and "mud throwing", it is found that the energy entropy of Hilbert's marginal spectrum is obviously different between them, which can be used as the detection of dredging barges' mud throwing behavior. A large number of data simulations under different scenarios show that the probability of false detection is 0 in the case of no mud throwing and the probability of leakage in the case of throwing mud is less than 6%. The scheme has good stability and feasibility.
【作者單位】： 水聲通信與海洋信息技術(shù)教育部重點實驗室(廈門大學(xué));廈門港口管理局安全監(jiān)督與科技信息化處;
【基金】：福建省交通運輸科技發(fā)展項目(201437) 國家自然科學(xué)基金(61571377,61471308)
【分類號】：U697

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