A method for measuring air bubbles in water body

Abstract

The invention discloses a method for measuring bubbles in a water body. The method comprises a bubble image identification process, a non-spherical bubble equivalent particle size conversion process and a bubble particle size inversion calculation process. By use of the bubble image identification process, bubble images and suspension images in the water body can be accurately distinguished from each other, and accurate bubble contours are obtained. By use of the non-spherical bubble equivalent particle size conversion process, errors in an equivalent conversion process can be reduced, and the calculation precision of equivalent spherical bubble particle sizes is improved. By use of the bubble particle size inversion calculation process, physical dimensions of bubble particle sizes are generated through combination of image calibration and inversion calculation. The precision is high, the real-time performance is good, original-position real-time measurement of physical parameters of the bubbles can be realized, and the method is suitable for wide application in such fields as scientific research, teaching, seawater monitoring and the like.

Description

technical field [0001] The invention belongs to the technical field of water sample detection, and in particular relates to a technology for collecting, identifying and calculating particle size parameters of air bubbles dissolved in a water body. Background technique [0002] Bubbles and the ocean are interdependent and inseparable. It plays a pivotal role in ocean remote sensing, ocean acoustics, ocean dynamics, ocean chemistry, marine biology, and marine meteorology, and affects the evolution of many ocean physical processes, such as sea-air exchange, sea surface aerosol formation, Microsurface particle enrichment on the sea surface and evolution of ocean currents, etc. [0003] Existing bubble analysis techniques can be roughly divided into two categories: acoustic and optical. The acoustic method measures the attenuation of the acoustic signal by the bubbles or the change of the sound velocity, and uses the relationship between the acoustic data and the particle size ...

AI Technical Summary

Problems solved by technology

However, affected by external factors such as gravity and seawater tension, the bubble contours extracted from the bubble image may not be completely regular spheres. If the irregular bubble contours are simply calculated according to the particle size calculation method of spherical bubbles Calculating its physical parameters will obviously lead to inaccurate particle size calculation results

In addition, the current bubble measurement methods mainly focus on studying the shape of bubbles through image processing technology, and rarely involve the inversion calculation of bubble size.

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