An in-situ detection method of optical stereo sampling to realize zooplankton information acquisition

Abstract

The invention discloses an optical stereo sampling in-situ detection method capable of acquiring zooplankton information. The method comprises the steps that laser pulse is transmitted by a pulsed laser and is reflected through zooplankton in a stereo sampling area, and a target echo signal is returned; when the target echo signal reaches a gating imaging device, a gating door of the gating imaging device is opened to receive the target echo signal, in-situ detection imaging is conducted on the zooplankton in the stereo sampling area, and an underwater two-dimensional strength image acquired by sampling is output; abundance information of the zooplankton is acquired according to the acquired behavior information, quantity information, size information of the zooplankton in the stereo sampling area through combining the underwater two-dimensional strength image and the volume of the stereo sampling area. By means of the method, the problems that in an existing in-situ detection imaging method, the real non-invasive and non-disruptive in-situ detection can not be achieved and the sampling area is uncertain are solved, the quantifiable optical stereo sampling area can be formed, and the acquisition of the non-disruptive stereo data of the zooplankton is achieved.

Description

technical field [0001] The invention relates to the technical field of detection and imaging, in particular to an optical three-dimensional sampling in-situ detection method for realizing information acquisition of zooplankton. Background technique [0002] The species, abundance and distribution of zooplankton are crucial to the study of zooplankton ecology and its related marine ecological effects. In particular, the continuous outbreak of jellyfish disasters in recent years has seriously affected the marine ecological environment and has become a problem that needs to be studied and solved. world problem. At present, human knowledge in this area is quite scarce, and almost all research is still in the stage of document accumulation and scientific hypothesis. The rapid acquisition of zooplankton data has become a bottleneck restricting the development of this research. [0003] The traditional method of obtaining zooplankton data mainly relies on net gear, which has a lo...

AI Technical Summary

Problems solved by technology

Since the detection target is zooplankton in the order of um to mm, the accuracy of the calibration equipment is high, and the calibration process is complicated, and the results are more dependent on subjective judgments

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