Progress of Underwater Acoustic Transducer

Since the 1960s, in order to achieve the sonar remote detection, the development of a number of new materials, structural vibration and energy conversion mechanism; the development of the work in low-frequency, broadband, high power and deep water transmitter, with high Such as PVDF hydrophone, composite piezo-electric hydrophone, concave-type bending transducer, and using Helmholtz resonance (HEM) as a new type of hydroacoustic transducer, Principle of the low-frequency hydrophone made by the application of the modulation of fluid flow switch fluid transducer, acousto-optic transducer.

Application Progress of Underwater Acoustic Detection Technology

Underwater acoustic detection technology plays an important role in ocean observation and underwater target detection. It is the main means to realize underwater target telemetry, but it has been focused on military applications. With the end of the Cold War era, a large number of military applications of underwater acoustic technology to civilian, marine acoustic detection technology will be rapid development. At present, the mature and developing ocean acoustic detection technology is ocean current profile measurement technology, acoustic imaging technology, fish group detection technology, acoustic tomography technology, acoustic multi-beam sounding technology and acoustic communication technology.

Underwater acoustic transducer sounding technology as an important technology for underwater detection, mainly used to measure the location and shape of objects in the water and underwater topography description.