Stem Sensor Notch Mechanism for Non-Disruptive Plant Inoculation
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Solution Overview
Problem
Current methods for automating precision, non-disruptive sensing and inoculation of plants are complex, expensive, and prone to errors due to the difficulty in distinguishing individual plants from a thick canopy and the unpredictability of outdoor crop research fields, leading to low throughput and inconsistent results in testing disease tolerance and applying treatments.
Innovation Solution
A mechanized, non-disruptive plant touch/contact sensing system that gently contacts plant stems using a notch mechanism to cradle the stem, allowing for precise detection and inoculation, mounted on a mobile platform that moves alongside the plants, enabling high-throughput and consistent inoculation with pathogens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If optical/imaging sensors are used for non-contact sensing, then plant detection can be performed without physical contact, but the system becomes prone to errors when distinguishing individual plants from thick canopy and debris
Solution Approach 1:
The patent introduces a mechanical intermediary system consisting of a physical sensor that contacts the plant stem directly, followed by a needle mechanism that delivers inoculum. This intermediary physical contact approach resolves the ambiguity of optical sensing by directly engaging the target plant stem, eliminating errors from canopy interference while maintaining controlled non-disruptive interaction.
Solution Approach 2:
The patent replaces the optical/mechanical sensing system with a purely mechanical sensing and inoculation system. The physical sensor detects plant stems through direct contact, and the needle mechanism mechanically delivers inoculum without optical components, substituting the complex optical system with a simpler mechanical approach that is more reliable in dense canopy conditions.
2Device complexity
If manual inoculation methods are used, then inoculation can be performed with simple equipment, but the throughput rate is low and inoculation consistency is unpredictable
Solution Approach 1:
The patent employs dynamic mechanisms including a rotating wheel with notches that sequentially engage plant stems, and a needle mechanism that dynamically extends and retracts to deliver inoculum. The system transitions from static manual inoculation to a dynamic automated process where the wheel rotation speed controls throughput, and the needle dynamically positions itself for precise inoculation delivery.
Solution Approach 2:
The patent implements preliminary positioning actions where the rotating wheel with notches pre-positions and centers each plant stem before the needle delivers inoculum. The sensor detects the stem position in advance, and the mechanical system pre-aligns the inoculation point, ensuring consistent delivery before the actual inoculation occurs.
3Productivity
If a mechanized sensing system is implemented to improve throughput, then inoculation speed increases, but the system complexity and cost increase significantly
Solution Approach 1:
The patent segments the inoculation system into distinct functional modules: a rotating wheel with notches for stem engagement and positioning, a separate sensor system for detection, and an independent needle mechanism for inoculum delivery. Each module performs a specific function, allowing the system to achieve high throughput through modular operation while maintaining manageable complexity through functional separation.
Solution Approach 2:
The rotating wheel with notches serves multiple functions: it positions stems, centers them for consistent inoculation, and sequences the inoculation process. The mechanical system universally handles various plant stem sizes and positions through its geometric design, reducing the need for multiple specialized components and simplifying the overall system architecture.
Data Source
AI summary
A mechanized, non-disruptive plant touch, or contact, sensing system for detecting by touch, or contact, the precise location of plants and/or plant stems relative to a machine in motion, and then disengage the plant without significantly affecting the plant's health or development.