Economical large-breadth blue light laser weeding device with compact structure

By using a compact structure of a 450nm semiconductor laser, a collimated focus lens module and an X-Y scanning galvanometer combination, the problems of easy breakage of optical fibers and high load-bearing capacity of robotic arms in the existing laser weeding technology are solved, and efficient and accurate weeding is achieved and cost-effective.

CN119699301APending Publication Date: 2025-03-28HEBEI AGRICULTURAL UNIV.
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Patent Information

Application Number
CN202510179006.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-18
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

The existing laser weeding technology has problems such as easy breakage of optical fibers, high load-bearing capacity of robotic arms, prominent heat dissipation problems, and complex system structure and high cost, which limits its widespread promotion in agriculture.

Method used

Using a 450nm semiconductor laser, collimated focusing lens module and X-Y scanning galvanometer combination, the laser beam is quickly deflected and precise illuminated by controlling the swing of the reflector, simplifying the system structure and reducing costs.

Benefits of technology

It has achieved efficient and accurate weeding, with a large area and low cost, which has solved the contradiction between the weeding area and system cost, and improved the application flexibility and practicality in the field of agricultural weeding.

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Abstract

The invention provides an economical large-breadth blue light laser weeding device with a compact structure. The device comprises a 450nm semiconductor laser (1), a collimation focusing lens module (2), an X-Y scanning galvanometer (3), a pseudo coaxial structural member (6), a dichroscope (7) and a CCD camera (8), the 450nm semiconductor laser, the collimating and focusing lens module and the X-Y scanning galvanometer are sequentially fixed together through connecting pieces, zero deflection and maximum deflection of a laser beam correspond to a central and angular beam (4) during operation, and an area which can be scanned by the blue laser beam is an irradiation surface (5); the dichroscope is mounted right below the X-Y scanning galvanometer at an angle of 45 degrees through the pseudo coaxial structural member; the CCD camera is installed below the 450nm semiconductor laser through a pseudo-coaxial structural member, and the CCD camera is matched with a lens to meet the requirement that the field of view is larger than the irradiation surface of the laser. The device has the advantages of being high in response speed and precision, large in weeding area, low in cost, small in size, convenient to integrate and the like.
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