Method and system for measuring emission response of resonance point of low-frequency transducer

Abstract

The invention discloses a method and system for measuring the emission response of a resonance point of a low-frequency transducer, relates to the field of underwater acoustic measurement of free-field transducers, and is mainly used for broadband measurement of emission parameters of underwater acoustic transducers. The method comprises the following steps: establishing a linear amplitude and phase response system of a transmitting transducer and a standard hydrophone, and establishing a time and frequency relationship of signals; performing phase correction on the open-circuit voltage signaland the transmitting current and voltage signal received by the standard hydrophone to obtain a transfer function of the system; according to the response characteristics of a transmitting transducer, estimating the frequency response of the transmitting transducer to obtain an estimation function s(f), and then performing integral average processing of multiple iterations on a system transfer function through the estimation function to eliminate the influence of reverberation of a pool and noise generation; finally, obtaining a transmitting current response and a transmitting voltage response of the transmitting transducer by utilizing the transfer function, and realizing measurement of transmitting parameters at a resonance point of the transmitting transducer.

Description

technical field [0001] The invention belongs to the technical field of underwater acoustic measurement, and in particular relates to a method and system for measuring the emission response of a resonance point of a low-frequency transducer. Background technique [0002] With the development of underwater acoustic technology, underwater acoustic measurement plays an important role in ensuring the performance indicators and normal use of underwater acoustic equipment. The free field is the sound field closest to the actual working environment of underwater acoustic equipment such as transducers and hydrophones. Therefore, the research on free field calibration plays an important role in ensuring the development and practical application of underwater acoustic transducers and hydrophones. [0003] For a long time, the emission current response and emission voltage response of the transmitting transducer (which can be referred to simply as the transducer’s emission response) hav...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies existing in the current low-frequency measurement method of the transmitting transducer and solving the problem of measuring the emission response of the low-frequency transmitting transducer, the present invention provides a method and system for measuring the emission response of the resonance point of the low-frequency transducer, which can realize low-frequency transduction Transmitter emission response measurement can realize broadband measurement of emission parameters near the resonance point of the low-frequency emission transducer in limited waters, and directly obtain the frequency response of the emission transducer in the entire frequency band

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