Plant Stem Water Potential Detector with Osmoticum Mediator
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Solution Overview
Problem
Current methods for measuring water potential in plants are not suitable for practical farming due to rigorous operational requirements and disruption of the soil-plant-atmosphere water continuum, and existing irrigation systems lack precision in matching irrigation quantities to site-specific crop water demands.
Innovation Solution
A method and system for installing a water potential detector in a plant stem using a compartment with an osmoticum and selective barriers, along with a pressure sensor, to measure water potential through intermediate contact with the vascular conduit, while maintaining the stem tissue wet and using conductive gel to prevent direct contact, and a central unit to calculate and evaluate irrigation conditions based on sensor data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a water potential sensor is inserted into the plant stem to measure water potential, then measurement precision is improved, but the soil-plant-atmosphere water continuum is disrupted
Solution Approach 1:
The patent introduces an intermediary substance (osmoticum solution) that fills the bore and mediates between the plant tissue and the sensor. This osmoticum creates a continuous water pathway from the xylem vessels through the bore filling material to the sensor membrane, allowing accurate measurement while maintaining the integrity of the water continuum. The intermediary prevents air gaps and discontinuities that would otherwise disrupt water flow and measurement accuracy.
2Ease of operation
If traditional insertion methods are used to install the sensor, then ease of operation is improved, but measurement reliability deteriorates due to air gaps and discontinuities
Solution Approach 1:
The patent applies hydraulic principles by using water-based osmoticum solution to fill the bore and establish continuous hydraulic contact between the plant tissue and sensor. The liquid filling material eliminates air gaps and ensures reliable water potential transmission to the sensor, thereby improving measurement reliability while maintaining ease of installation through a simple drilling and filling process.
3Measurement precision
If direct contact between the sensor membrane and stem tissue is made, then measurement precision is improved, but harmful factors increase due to tissue damage and contamination
Solution Approach 1:
The patent uses the osmoticum solution as an intermediary medium that transmits water potential signals from the plant tissue to the sensor membrane without requiring direct contact. The liquid filling material maintains hydraulic continuity while physically separating the sensor membrane from the stem tissue, thereby preventing tissue damage, contamination, and sensor fouling while preserving measurement accuracy.
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
Enables accurate, real-time measurement of water potential and irrigation condition monitoring, reducing irrigation costs by determining optimal water needs and preventing over- or under-irrigation, and allowing for precise site-specific irrigation management.
Implementation Method 1
at least one selective barrier for selective transfer of water between the plant tissue and the osmoticum, while blocking transfer of other ingredients within the plant fluid
Implementation Method 2
a pressure sensor configured for sensing changes in pressure of said osmoticum in said compartment
Data Source
AI summary
The present invention provides devices, systems and methods for installing water potential detectors in plants stems, measuring the water potential in the plants, and evaluating crop irrigation conditions.