A method and system for measuring the emission response of a low frequency transducer resonance point
A measurement method and transducer technology, applied in the direction of transducers and electrical components used underwater to achieve the effect of eliminating influence
Active Publication Date: 2021-08-17
THE 715TH RES INST OF CHINA SHIPBUILDING IND CORP
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[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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[0047] In order to describe the present invention more specifically, the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0048] The present invention is a method and system for measuring the emission response of a resonance point of a low-frequency transducer, and the measurement system is as follows: figure 1 As shown, the composition and requirements of the instruments and equipment in the measurement system are as follows: (1) The signal transmitter 1 (arbitrary function generator) that can emit mutually orthogonal linear frequency sweep signals, and has a flat frequency response within the measurement frequency band; (2) ) a linear power amplifier 2, which has a linear response to the magnitude and phase of the input voltage and input current in the measurement frequency band; (3) a preamplifier 8, which has higher impedance and lower noise, And it has phase consistency...
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The invention discloses a method and system for measuring the emission response of a resonance point of a low-frequency transducer. The method and the corresponding system relate to the field of underwater acoustic measurement of free-field transducers, and are mainly used for broadband measurement of emission parameters of underwater acoustic transducers. The invention first establishes the linear amplitude and phase response system of the transmitting transducer and the standard hydrophone, and establishes the time and frequency relationship of the signal. The phase correction is carried out on the open circuit voltage signal received by the standard hydrophone and the transmitted current and voltage signal to obtain the transfer function of the system. According to the response characteristics of the transmitting transducer, the frequency response of the transmitting transducer is estimated to obtain the estimated function s(f), and then the estimated function is used to perform integral and average processing on the system transfer function for multiple iterations to eliminate the pool Effects of reverberation and noise. Finally, the transmission current response and the transmission voltage response of the transmitting transducer are obtained by using the transfer function, and the measurement of the transmitting parameters at the resonance point of the transmitting transducer is realized.
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...
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IPC IPC(8): H04R29/00H04R1/44
CPCH04R1/44H04R29/00
Inventor 贾广慧陈毅平自红王世全张军杨柳青
Owner THE 715TH RES INST OF CHINA SHIPBUILDING IND CORP