A lightweight laser weeding system suitable for unmanned aerial vehicles

The lightweight laser weeding system, with its modular design and standardized interfaces, solves the problems of insufficient energy density and payload limitations for drones operating at high altitudes, achieving large-area, high-efficiency weeding results and improving the system's compatibility and reliability.

CN122139725APending Publication Date: 2026-06-05HUAZHONG UNIV OF SCI & TECH +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUAZHONG UNIV OF SCI & TECH
Filing Date
2026-01-22
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Drones equipped with laser weeding systems face challenges such as operating height limitations, energy density decay, payload and power consumption limitations, contradictions between operating area and efficiency, and poor system integration and compatibility, making it difficult to achieve efficient weeding with large area and high energy density at ultra-long working distances.

Method used

A modular, lightweight laser weeding system was designed, including a lightweight high-power fiber laser, a large-format high-speed galvanometer, and an ultra-long focal length, wide-field lens. Combined with standardized interfaces and advanced communication solutions, it enables ultra-large-format, efficient, and precise weeding at heights ranging from 1600mm to 2350mm.

Benefits of technology

It solves the problem of insufficient energy density in high-altitude operations, achieves a balance between lightweight and high efficiency, significantly improves the efficiency of single-machine operation, enhances the system's compatibility and reliability, and ensures the consistency and reliability of weeding results.

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Abstract

The application discloses a lightweight laser weeding system suitable for unmanned aerial vehicles and key components. The system comprises an unmanned aerial vehicle flight platform and a modular weeding assembly connected through a standardized interface, and the assembly contains an air-cooled fiber laser (300W), a high-speed galvanometer and an ultra-long focal length field lens. The working height of the unmanned aerial vehicle is 1600-2350 mm. The focal length of the field lens is 2350 mm, which can focus the laser into a spot with a diameter of less than 2 mm at a working distance of 1600-2350 mm, forming an ultra-large effective scanning range. The optical design is based on edge spot optimization, scanning field correction and focusing depth optimization algorithm, which guarantees the uniformity of the whole field spot and positioning accuracy. The application solves the contradiction between the insufficient energy density, the load limit and the low operation efficiency of the unmanned aerial vehicle high-altitude weeding, and realizes lightweight, ultra-long distance, large range and high-efficiency precise weeding.
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