Applicator Arm Linkage for Obstacle-Safe Plant Treatment
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Solution Overview
Problem
Existing vegetation treatment devices face challenges in avoiding damage to obstacles such as trunks, shrubs, and pillars while effectively treating vegetation, due to sensor inaccuracies, soil disturbance, and inefficient movement, leading to poor treatment outcomes and increased costs.
Innovation Solution
A device with a compact, lightweight applicator system using pivot joints and trailing applicators that minimize impact force and maintain optimal orientation relative to the direction of travel, eliminating the need for sensors and ensuring uniform application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If sensors are installed in front of work elements to detect obstacles early, then obstacle detection capability is improved, but the treatment equipment swings out of the row too early causing poor treatment outcome
Solution Approach 1:
The patent replaces sensor-based obstacle detection with a mechanical sensing system using a sensing wheel that physically contacts the ground. This mechanical approach directly measures ground impedance changes caused by obstacles, eliminating the problems of optical sensor failures and premature triggering. The sensing wheel provides real-time, accurate obstacle detection without the reaction time delays inherent in sensor systems.
Solution Approach 2:
The treatment equipment uses its own movement and mechanical interaction with the ground to detect obstacles, rather than relying on separate sensing systems. The sensing wheel is integrated into the equipment's mechanical structure, and the equipment's natural progression through the terrain provides the detection function, eliminating the need for separate early-detection sensor systems.
2Productivity
If treatment device operates at high speed to increase productivity, then treatment area coverage is improved, but obstacle detection accuracy deteriorates
Solution Approach 1:
The patent replaces sensor-based detection with a mechanical sensing wheel that directly contacts the ground. This mechanical system provides immediate physical feedback about obstacles regardless of vehicle speed, eliminating the speed-accuracy tradeoff inherent in sensor systems. The sensing wheel's direct mechanical interaction with the terrain provides real-time obstacle information even at high operating speeds.
3Productivity
If treatment element strikes obstacles directly to maximize treatment effectiveness, then treatment effectiveness is improved, but obstacle damage increases
Solution Approach 1:
The patent employs a spring element that acts as a cushion between the treatment element and obstacles. When the sensing wheel detects an obstacle, the spring element absorbs the impact energy, allowing the treatment element to maintain contact with the ground and treat vegetation while preventing direct transmission of impact forces to the obstacle. This cushioning mechanism enables continuous operation at high speeds without damaging obstacles.
Solution Approach 2:
The patent makes the treatment element's contact with the ground dynamic rather than rigid. The spring element allows the treatment element to adapt its contact force in real-time, maintaining effective treatment pressure on vegetation while automatically reducing force when encountering obstacles. This dynamic adjustment enables the system to maximize treatment effectiveness while minimizing obstacle damage.
4Object-affected harmful factors
If soil is moved away from weeds to create safety buffer, then obstacle avoidance is improved, but weed regrowth increases
Solution Approach 1:
The patent replaces soil-moving mechanical methods with a sensing-based approach. The sensing wheel detects obstacles through ground impedance changes, allowing the equipment to navigate around obstacles without moving soil. This eliminates the harmful effects of soil disturbance while maintaining obstacle avoidance capability through precise mechanical sensing and equipment steering.
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
The device achieves effective vegetation treatment with minimal damage to obstacles and uniform coverage, optimizing speed and reducing manual rework, while being adaptable to varying obstacle distances and vegetation types.
Implementation Method 1
a spring element which cushions the movement of the treatment element in order to minimize the impact force with which the treatment element strikes an obstacle
Implementation Method 2
a friction element which is arranged to minimize the frictional resistance which the treatment element encounters when moving forward
Data Source
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AI summary
The invention relates to a device for treating plants, using an applicator that is secured to an applicator holder, the device comprising a primary slave arm to the first end of which a tool carrier is hingedly mounted and to the second end of which the applicator holder is mounted. In addition, the invention relates to a vehicle comprising this type of device, and to use of a device of this type.