基于PVDF球形换能器的载人潜水器浮力材料损伤侦听定位技术  

On the Detection and Location Technology of Buoyancy Material Damage in Human Occupied Vehicle Based on PVDF Spherical Transducers

作　　者：丁忠军 尹广睿 刘晨 刁广照 李洪宇[1] DING Zhong-jun;YIN Guang-rui;LIU Chen;DIAO Guang-zhao;LI Hong-yu(College of Ocean Science and Engineering,Shandong University of Science and Technology,Qingdao Shandong 266590,China;National Deep Sea Center,Qingdao Shandong 266237,China;Jinan Jundaren Experimental Instrument Co.Ltd.,Jinan 250014,China)

机构地区：[1]山东科技大学海洋科学与工程学院,山东青岛266590 [2]国家深海基地管理中心,山东青岛266237 [3]济南君达人实验仪器有限公司,济南250014

出　　处：《船海工程》2024年第4期6-12,共7页Ship & Ocean Engineering

基　　金：国家重点研发专项(2017YFC0306600);山东省重点研发计划(2020JMRH0101)。

摘　　要：针对载人潜水器作业过程中浮力材料受损位置难以实时监测、定位的问题,提出一种基于聚偏氟乙烯(PVDF)球形换能器的载人潜水器浮力材料损伤定位的方法。为确定损伤部位中浮力材料损伤的精确位置,设计了基于最优四元阵列原理的PVDF球形换能器阵列。利用时延差值法进行声源定位模型的建立,获得浮力材料断裂部位的精确坐标。为提取有效的浮力材料断裂声信号,设计了基于改进DnCNN(denoising convolutional neural network)声信号去噪方法。根据定位原理设计了浮力材料损伤定位的软硬件系统,并搭建实验平台验证了方法的可行性。实验结果表明,基于改进DnCNN声信号去噪方法在实验室模拟噪声环境下,可以对浮力材料断裂目标信号进行有效提取;在声源位置距离球形换能器中远距离处取得了良好的定位效果,定位误差为±0.2 m,符合定位要求。A method based on polyvinylidene fluoride(PVDF)spherical transducers was proposed to locate the damage location of buoyancy materials in human occupied vehicle during operation,which was difficult to monitor and locate in real-time.In order to determine the precise location of buoyancy material damage in the damaged area,a PVDF spherical transducer array based on the optimal quaternion array principle was designed.A sound source localization model was established,using the time delay difference method to obtain accurate coordinates of the fracture location of buoyancy materials.A software and hardware system for damage localization of buoyancy materials was developed based on the localization principle,and an experimental platform was built to verify the feasibility of the method.The experimental results showed that the improved DnCNN acoustic signal de-noising method can effectively extract the fracture target signal of buoyancy materials in laboratory simulated noise environments.A good positioning effect was achieved at a distance between the sound source and the spherical transducer,with a positioning error of±0.2 m,which meets the positioning requirements.

关 键 词：载人潜水器 损伤定位 PVDF球形换能器阵列 DnCNN神经网络 

分 类 号：U674.941[交通运输工程—船舶及航道工程]