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Linear hydrophone array amplitude and phase consistency measuring method

A hydrophone and consistency technology, applied in the measurement of vibration, measurement device, vibration measurement in fluid, etc., can solve the problem of inability to measure the consistency of the linear hydrophone array amplitude and phase consistency of the hydrophone, and achieve The effect of improving measurement accuracy

Inactive Publication Date: 2016-09-28
HARBIN ENG UNIV
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Problems solved by technology

[0005] The main purpose of the present invention is to overcome the deficiencies in the above-mentioned technology, and provide a method for measuring the amplitude and phase consistency of linear hydrophone arrays that solves the problem that the prior art cannot measure the consistency of hydrophones in the array

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  • Linear hydrophone array amplitude and phase consistency measuring method
  • Linear hydrophone array amplitude and phase consistency measuring method
  • Linear hydrophone array amplitude and phase consistency measuring method

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Embodiment Construction

[0019] The present invention will be further explained below in conjunction with the drawings:

[0020] The invention belongs to the field of underwater acoustic transducers, and specifically relates to the measurement of the amplitude and phase consistency of a linear hydrophone array. The invention includes: the linear hydrophone array is vertically hung on the mechanical lifting device, and the hydrophones are numbered 1#, 2#..., 1# hydrophone and transmitting transducer from top to bottom. The transmitter is basically at the same water depth; the transmitter transducer emits a single-frequency pulse signal, and the 1# hydrophone receives and saves the signal. The time when the signal is transmitted is the initial time of signal acquisition; the hydrophone array is raised to a certain height, and the ascent distance is The distance between the two hydrophones is to repeatedly transmit single-frequency pulse signals. The 2# hydrophone receives and saves the signals, and then me...

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Abstract

The invention belongs to the field of underwater acoustic transducers, in particular to a method for measuring the amplitude and phase consistency of a linear hydrophone array. The invention includes mechanically fixing the hydrophone array on the lifting device, the lifting device lifts the hydrophone array up and down at a fixed interval, hangs the transmitting transducer at a certain distance from the hydrophone array, and the distance meets the requirements of the transducer. The far-field distance from the hydrophone, the hanging depth of the transmitting transducer is the same as the depth of the hydrophone at the top of the hydrophone array; the hydrophone array and the lifting device are mechanically fixedly connected, during the lifting process, the hydrophone array Always remain vertical with no horizontal wobble or movement. The invention adopts the method of moving the hydrophone in the vertical direction, which avoids the phase error caused by the distance error in the horizontal direction caused by moving the hydrophone in the horizontal direction or re-hanging the hydrophone during the consistency measurement of the traditional hydrophone.

Description

Technical field [0001] The invention belongs to the field of underwater acoustic transducers, and particularly relates to a method for measuring the consistency of linear hydrophone array amplitude and phase. Background technique [0002] The inconsistency of the amplitude and phase of the hydrophone refers to the amplitude and phase difference of the output of two or more hydrophones under the same instantaneous sound pressure. When multiple hydrophones are used in arrays, the phase consistency of the hydrophones is an important indicator related to system performance. It is easy to achieve the consistency calibration of the hydrophone amplitude. However, it is difficult to accurately determine the distance between the transducer and the sound velocity of the medium in the calibration, and the distance and sound velocity have a greater impact on the phase measurement, so the phase of the hydrophone is affected. Accurate calibration is more difficult. [0003] Scholars at home an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H3/00
CPCG01H3/005
Inventor 陈文剑殷敬伟孙辉刘冰吕良浩郭嘉浩余德本尹爽
Owner HARBIN ENG UNIV
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