Multimodal Soil Sensor Fusion Platform
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Solution Overview
Problem
Existing soil sensing technologies are cumbersome due to the need for multiple discrete sensors, and they often degrade quickly in soil environments, leading to short lifetimes and instability in performance.
Innovation Solution
The development of sensor assemblies that include multiple sensor blocks with ion-sensitive membranes and solid-state reference electrodes, capable of detecting a wide range of soil conditions and nutrients, including temperature, humidity, light, moisture, electrical conductivity, pH, and various soil nutrients, while being durable and resistant to soil environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple discrete sensors are used to detect various soil properties, then the sensing capability is improved, but the device complexity and system overhead increase
Solution Approach 1:
The patent combines multiple discrete sensors (moisture, temperature, light, pH, EC, nutrient sensors) into a single integrated sensor assembly that can detect multiple soil properties simultaneously. This merging approach maintains comprehensive sensing capability while reducing system overhead, cabling requirements, and deployment complexity compared to using separate discrete sensors.
Solution Approach 2:
The sensor assembly is designed as a universal multi-functional device that can detect various soil properties (moisture, temperature, light, pH, electrical conductivity, and multiple nutrients) through a single integrated unit. This multi-functionality allows the same device to perform multiple sensing tasks that would otherwise require separate specialized sensors.
2Reliability
If traditional sensors are used in soil environments, then initial sensing performance is achieved, but the sensor lifetime is shortened due to rapid material degradation
Solution Approach 1:
The patent employs composite material structures for the sensor components, particularly using corrosion-resistant materials and protective coatings that combine multiple properties (chemical resistance, mechanical strength, electrical conductivity). These composite materials maintain sensor performance in harsh soil environments while extending operational lifetime compared to traditional single-material sensors.
Solution Approach 2:
The patent describes sensor assemblies designed for potential replacement or reconfiguration, where individual sensor blocks can be substituted. While this approach uses simpler, potentially less durable individual components, the modular design allows cost-effective replacement rather than requiring protection of expensive permanent sensors, effectively managing the lifetime issue through economical replacement cycles.
3Productivity
If traditional sensor assemblies are deployed, then basic soil monitoring is achieved, but stability and predictability of performance deteriorate over time
Solution Approach 1:
The patent implements drift compensation mechanisms that actively monitor and adjust sensor output parameters over time. By detecting changes in sensor characteristics (such as reference electrode potential drift) and applying correction algorithms, the system maintains stable and predictable performance readings even as physical sensor properties change during extended operation in soil environments.
Solution Approach 2:
The sensor assembly includes reference electrodes and compensation circuits that provide continuous feedback on sensor performance and environmental conditions. This feedback enables real-time calibration adjustments and performance verification, ensuring stable and predictable sensing output throughout the operational lifetime of the device.
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 proposed solution enables efficient and stable multi-parameter soil sensing, providing long-lasting and reliable data on soil health metrics, which is essential for precision agriculture systems.
Implementation Method 1
Each sensor block includes sensors (e.g., arranged in rows or arrays) for detecting a wide range of soil conditions and nutrients
Implementation Method 2
solid-state reference electrodes, capable of detecting a wide range of soil conditions and nutrients
Data Source
Figure 1A~1C
Figure 2A~2B
Figure 3
AI summary
A sensor assembly includes a housing and multiple sensor array segments. A first sensor array segment includes an antenna. A second sensor array segment has a soil temperature sensor, an electrical conductivity (EC) sensor, a moisture sensor, an ion-sensitive field effect transistor (ISFET) nitrate sensor for detecting nitrates in adjacent soil, an ISFET phosphate sensor for detecting phosphates in adjacent soil, an ISFET potassium sensor for detecting potassium in adjacent soil, and an ISFET pH sensor for detecting pH in adjacent soil, and a reference electrode electrically coupled to the first sensor array segment and to the second sensor array segment. The first sensor array segment and the reference electrode can be disposed on opposite sides of the second sensor array segment.