Hydrophone phase low-frequency calibration tube

Abstract

The invention relates to the field of an underwater sound metering test, which is mainly a hydrophone phase low-frequency calibration tube comprising a metal rigid tube body; the metal rigid tube body is internally provided with a calibration tube cavity and an energy converter cavity which are communicated; the calibration tube cavity is used for containing liquid medium and forming a liquid column, and the thickness of the tube wall of the metal rigid tube body is larger than or equal to the radius of the calibration tube cavity; a supporting step of the bottom part of the calibration tube cavity is provided with a soft rubber vibrating membrane, a vibrating piston is connected below the soft rubber vibrating membrane, a vibrating coil is bonded and fixed at the back surface of the vibrating piston by epoxy resin, and the center line of the soft rubber vibrating membrane, the center line of the vibrating piston and the center line of the vibrating coil are completely coincided with the center line of the metal rigid tube body; and the energy converter cavity is internally provided with a piston-type electrodynamic energy converter. The invention has the beneficial effects of: being applicable to measurement and calibration of the small-size hydrophone low-frequency acoustic characteristic, being characterized by low frequency, wide band, oil resistance, water-leakage prevention and corrosion resistance and the like and having good time stability and temperature stability.

Description

Technical field [0001] The invention relates to the field of hydroacoustic measurement and testing, specifically belongs to the field of acoustic electric transducers, and mainly relates to a hydrophone phase low-frequency calibration tube. Background technique [0002] Since the sonar array requires the phase and amplitude consistency of the hydrophone elements, the current methods for calibrating hydrophones in the low frequency band include: vibration liquid column method, coupling cavity reciprocity method and piezoelectric compensation method, etc. The measuring devices built on these methods are complex in composition, and the measuring procedures and device maintenance are cumbersome. The comparison method calibration device established by using the patented hydrophone phase low-frequency calibration tube of the present invention has the characteristics of simple structure, easy operation and maintenance, and is convenient for calibration and measurement of low-freque...

AI Technical Summary

Problems solved by technology

Internationally, the United States USRD has done a lot of research and application on electric transducers for underwater acoustic measurement. It has successively developed a variety of low-frequency electric transmitters such as J9 and J11, but the combination of electric transducers and metal thick-walled tubes As a whole, it is used to calibrate and measure the low-frequency acoustic performance of hydrophones, and there is no literature report

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