Handheld Soil VOC Sensor Strip System
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current soil analysis methods are inefficient and time-consuming, requiring samples to be sent to a testing center, which delays farmers' ability to assess soil health and make timely adjustments for crop optimization.
Innovation Solution
A handheld system comprising a sampling chamber, a soil VOC sensor strip with semiconductor polymer sensors, and an electrical resistance detector, allowing for on-site analysis of volatile organic compounds in soil.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If samples are sent to a testing centre for analysis, then accurate soil health assessment is achieved, but analysis time is delayed by days
Solution Approach 1:
The patent extracts the soil analysis function from centralized testing centers and implements it in portable handheld devices that can be used directly in the field. The sensor strip technology enables soil health assessment to be performed locally without sending samples to external facilities, thus eliminating the time delay while maintaining assessment capability
Solution Approach 2:
The patent creates a simplified copy of the laboratory analysis function through portable sensors and handheld devices. The sensor strips replicate the analytical capabilities of centralized labs in a compact, field-deployable format, enabling rapid on-site measurement of soil parameters without compromising the essential assessment functions
2Reliability
If impedance spectroscopy is used to analyse VOCs, then reliable detection is achieved, but device complexity increases due to three-terminal structure and mathematical modelling requirements
Solution Approach 1:
The patent extracts the essential VOC detection function from complex impedance spectroscopy systems and implements it using simpler two-terminal semiconductor polymer sensors. This removes the unnecessary gate electrode and complex mathematical modeling requirements while retaining the core capability of reliable VOC detection through direct resistance measurement
Solution Approach 2:
The patent employs disposable sensor strips with simple two-terminal semiconductor polymer sensors that can be replaced after use. These inexpensive, single-use sensors eliminate the need for complex, expensive, and maintainable three-terminal impedance spectroscopy devices, achieving reliable VOC detection through a simpler, more economical approach
3Loss of information
If current soil analysis methods are used, then comprehensive soil health data is obtained, but the process is time-consuming and requires multiple steps
Solution Approach 1:
The patent combines multiple soil analysis functions into a single integrated handheld device that can measure various soil parameters (including VOCs through sensor strips, moisture, temperature, and other properties) simultaneously. This consolidation enables comprehensive soil health assessment in one operation rather than requiring multiple separate tests and steps
Solution Approach 2:
The handheld device is designed with universal capabilities to perform multiple types of soil analysis functions. The device can accommodate different sensor strips for various measurements and provides comprehensive soil health assessment through a single multi-functional platform, increasing productivity while maintaining information completeness
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 system enables rapid, cost-effective, and real-time analysis of soil health, providing immediate advice on how to improve soil conditions and increase crop yields.
Implementation Method 1
an array of semiconductor polymer sensors arranged on the first surface, wherein each of the semiconductor polymer sensors comprises a pair of electrodes, wherein a semiconductor polymer is disposed between the first electrode and the second electrode
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The present invention relates to a system for analysing volatile organic compounds (VOCs) in soil comprising an apparatus and a soil VOC sensor strip, wherein the apparatus comprises a sampling chamber for receiving soil, a sensor strip aperture in the sampling chamber for positioning the sensor strip in fluid communication with the sampling chamber, a power source and an electrical resistance detector, wherein the sensor strip comprises a flexible substrate with a first surface and an array of semiconductor polymer sensors arranged on the first surface, wherein each of the semiconductor polymer sensors comprises a pair of electrodes, wherein the pair of electrodes comprises a first electrode and a second electrode, wherein a semiconductor polymer is disposed between the first electrode and the second electrode, and wherein the sensor strip is electrically connectable to the power source and the electrical resistance detector.