Rotary Weed End Effectors for No-Till Mulching Control
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Solution Overview
Problem
Conventional weed control methods, including tilling and chemical herbicides, are inefficient and environmentally harmful, while existing robotic systems fail to effectively manage grass-like weeds in no-till farming, particularly in organic operations.
Innovation Solution
A robotic weed control apparatus with end effectors featuring rotary axles and abrasion members that dislodge weed crowns and stems from the ground, converting them into mulch without disrupting soil structure, using a chassis and controller for precision operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional robotic systems use mowing-type operations to control weeds, then broad-leaf weeds can be controlled, but grass-like weeds are not significantly impacted
Solution Approach 1:
The end effector is divided into multiple functional components: a rotary axle with abrasive members for mechanical removal of grass-like weeds, and a separate deflector system for broad-leaf weed management. This segmentation allows each component to be optimized for its specific target weed type, resolving the contradiction between broad-leaf and grass-like weed control effectiveness.
Solution Approach 2:
The system employs a rotary axle that can rotate at variable speeds and directions, allowing dynamic adaptation to different weed types. The abrasive members can be adjusted to different positions and configurations, enabling the system to switch between controlling broad-leaf weeds and grass-like weeds effectively, thereby improving overall adaptability while maintaining reliability for both weed types.
2Productivity
If tilling is used for weed control, then weeds are removed, but soil erosion increases and soil quality deteriorates
Solution Approach 1:
The patent replaces the heavy mechanical tilling system with a lightweight robotic end effector that uses abrasive members to mechanically remove weeds through friction and abrasion. This substitution eliminates the need for deep soil disturbance while maintaining effective weed removal, thus preventing soil erosion and preserving soil quality.
Solution Approach 2:
The system changes the operational parameters from deep mechanical disruption (tilling) to surface-level abrasion and friction. By controlling the depth of abrasion and the force applied by the rotary axle, the system achieves effective weed removal without the harmful soil disturbance associated with conventional tilling methods.
3Productivity
If chemical herbicides are used for weed control, then weeds are suppressed, but environmental harm increases and weed resistance develops
Solution Approach 1:
The robotic system performs self-service weed removal through mechanical means, eliminating the need for chemical herbicides. The end effector with its abrasive members and rotary axle mechanically removes weeds through physical contact and friction, providing an environmentally friendly alternative that avoids chemical pollution and reduces the development of weed resistance.
Solution Approach 2:
The system converts the potentially harmful effect of mechanical contact (which could damage crops) into a beneficial weed removal process. By using controlled abrasion and friction through the rotary axle and abrasive members, the system effectively removes weeds while leaving soil and crops intact, replacing chemical harm with controlled mechanical action.
4Productivity
If manual labor is used for weed control, then weeds are removed, but time consumption and cost increase significantly
Solution Approach 1:
The patent replaces manual labor with an automated robotic system featuring a rotary axle and abrasive members. This mechanical substitution enables continuous, high-speed weed removal without human intervention, dramatically reducing time consumption and labor costs while maintaining effective weed removal productivity.
Solution Approach 2:
The robotic system enables continuous weed removal operation without the breaks and limitations of manual labor. The rotary axle can continuously rotate and the abrasive members can continuously contact and remove weeds as the system moves through the field, providing uninterrupted useful action that significantly reduces time loss compared to manual methods.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively removes weeds while preserving soil integrity, reducing chemical reliance, and suppressing regrowth, suitable for no-till farming and organic practices.
Implementation Method 1
two or more end effectors including a first end effector comprising a first rotary axle and a second end effector comprising a second rotary axle... a first plurality of weed abrasion members removably coupled to the first rotary axle... a second plurality of weed abrasion members removably coupled to the second rotary axle... configured to dislodge one or both of a crown portion and a stem portion of the unwanted plant material from the ground
Data Source
AI summary
An apparatus for weed removal includes a chassis and at least two end effectors mechanically coupled to the chassis, each end effectors including a rotary axle, each rotary axle coupled to a drive unit for receiving a mechanical force to cause the rotary axle to rotate. The rotary axles, along with weed abrasion members coupled thereto, are at least partially covered by a deflector. A front end effector is configured to dislodge a crown and/or stem portion of unwanted plant material from the ground, while another end effector is configured to convert the unwanted plant material that has been dislodged from the ground into mulch.