On the Detection and Location Technology of Buoyancy Material Damage in Human Occupied Vehicle Based on PVDF Spherical Transducers
A method based on polyvinylidene fluoride(PVDF)spherical transducers was proposed to locate the damage lo-cation 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 sys-tem 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-noi-sing 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.
human occupied vehicledamage locationPVDF spherical transducer arrayDnCNN neural network
NETL
NSTL
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