A fish non-destructive sampling and measurement device and method based on machine vision

Through a non-destructive fish sampling device based on machine vision, fish phototaxis and dissolved oxygen concentration differences are used to attract and zone fish. Combined with an LED fill light matrix and proximity switch, non-destructive and high-precision fish sampling and measurement are achieved.

CN117617188BActive Publication Date: 2025-10-03FRESHWATER FISHERIES RES CENT OF CHINESE ACAD OF FISHERY SCI
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Patent Information

Application Number
CN202311625175.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-11-30
Publication Date
2025-10-03
Estimated Expiration
2043-11-30

AI Technical Summary

Technical Problem

Existing fish sampling methods are prone to causing damage to fish, are not convenient for zoning and stable connection, and are difficult to achieve non-destructive sampling and measurement.

Method used

A non-destructive fish sampling and measurement device based on machine vision is used to lure and guide fish based on their phototaxis and dissolved oxygen concentration differences. Fish classification and measurement are carried out in combination with an LED fill light matrix and proximity switches, achieving non-destructive sampling through machine vision.

Benefits of technology

The method realizes non-destructive sampling of fish, is simple to operate, has high sampling accuracy, avoids damage to fish, and improves the stability and automation level of the sampling device.

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Abstract

The present invention discloses a non-destructive fish sampling and measurement device and method based on machine vision, relating to the field of fish sampling technology. The measurement device includes a collection chamber, an induction component, and a camera. A support frame is installed at the inlet of the collection chamber, and the outlet of the collection chamber is connected to a large measurement chamber. The side walls of the collection chamber are connected to the inlets of small and medium-sized measurement chambers. The collection chamber and the small to large measurement chambers are all equipped with an induction component, a camera, and a proximity switch, and an LED fill light matrix light is provided at the outlet. The camera, proximity switch, and LED fill light matrix light are all electrically connected to a computer on the water surface. The measurement method includes attracting, classifying and guiding, controlling the number, measuring, operating an image acquisition device, outputting images, and processing images. The present invention utilizes the phototaxis of fish to achieve fish attracting, guides fish by dissolved oxygen concentration, flow direction, and successively increasing light intensity, and achieves non-destructive fish sampling and measurement through machine vision.
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