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Acoustic signal identification method of fresh water body bubbles

A recognition method and acoustic signal technology, applied in the direction of re-radiation of sound waves, utilization of re-radiation, measurement devices, etc., can solve problems such as inaccurate evaluation results and signal misjudgment, and achieve the effect of reducing signal misjudgment and improving accuracy

Pending Publication Date: 2019-12-03
PEARL RIVER FISHERY RES INST CHINESE ACAD OF FISHERY SCI
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Problems solved by technology

However, when using acoustic technology to investigate the release of air bubbles in water bodies, since the distribution range of the target intensity of the air bubbles highly overlaps with the fish in the water body, it will lead to misjudgment of the signal, resulting in inaccurate evaluation results

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  • Acoustic signal identification method of fresh water body bubbles
  • Acoustic signal identification method of fresh water body bubbles
  • Acoustic signal identification method of fresh water body bubbles

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Embodiment Construction

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

[0047] Examples of the described embodiments are shown in the drawings, wherein like or similar reference numerals designate like or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0048] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clock...

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Abstract

The invention, which relates to the technical field of acoustic signal identification of fresh water body bubbles, discloses an acoustic signal identification method of fresh water body bubbles. The method comprises the following steps: S1, carrying out acoustic data acquisition; S2, carrying out acoustic data analysis; S3, carrying out signal identification; S4, carrying out result verification.To be specific, the S1 also includes the following steps: A1, selecting a reservoir or a lake as a research water body, vertically and downwards fixing a fish finder transducer on a ship board, and enabling the draft to be about 0.5m and the ship speed to be less than or equal to 3km / h; A2, setting a course direction to be a density gradient line perpendicular to bubbles and employing two modes ofa Z-shaped mode or a parallel section mode. According to the invention, original acoustic data are collected and analyzed; the signal characteristics, motion rules and recognition methods of underwater gas are explored; a novel idea is provided for analyzing sediment and evolution of rivers, lakes and reservoirs; and signal misjudgment can be reduced in the resource assessment, so that the resource assessment accuracy is improved.

Description

technical field [0001] The invention relates to the technical field of acoustic signal identification of air bubbles in fresh water, in particular to an acoustic signal identification method for air bubbles in fresh water. Background technique [0002] The increase of atmospheric greenhouse gas concentration and a series of ecological and environmental problems caused by global warming have attracted widespread attention to the "source / sink" of greenhouse gases. As an important source and sink of greenhouse gases, aquatic ecosystems have an important impact on changes in the concentration of greenhouse gases in the atmosphere. The release process of greenhouse gases has a high degree of spatiotemporal heterogeneity, various release methods, and the release process is affected by many factors, resulting in increased uncertainty in evaluating its release. Currently, there are three main methods to measure gas emissions: gas traps, video / pictures, and ultrasonic detection tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S15/88G01S15/58G01S7/527G01S7/536
CPCG01S15/88G01S15/58G01S7/527G01S7/536
Inventor 武智李捷李新辉朱书礼杨计平李跃飞
Owner PEARL RIVER FISHERY RES INST CHINESE ACAD OF FISHERY SCI
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