VOC Sensor Array for Early Insect Larvae Detection
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Solution Overview
Problem
Current methods for detecting stored product insects (SPIs) are inefficient due to variability in pheromone trap data affected by temperature, human activity, and insect dynamics, and lack a cost-effective and accurate means to detect insect eggs and larvae, leading to delayed infestation detection and significant economic losses.
Innovation Solution
A low-cost, high-accuracy method and device using VOC sensors to detect specific VOCs like 11,13-hexadecadienal, which are configured to identify insect infestations by measuring conductance changes in a target fluid flow, allowing for real-time, non-invasive detection of insect eggs, larvae, and adult insects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pheromone traps with synthetic lures are used to detect stored product insects, then adult insects can be captured and monitored, but the detection data becomes highly variable due to temperature effects, human activity, and insect dynamics
Solution Approach 1:
The invention extracts and detects specific volatile organic compounds (pheromones and semiochemicals) directly from the stored product environment using VOC sensors, rather than relying on trap catch data. This extraction approach isolates the chemical signals from the confounding variables affecting trap performance, enabling direct measurement of insect presence and infestation levels with greater precision and reliability
Solution Approach 2:
The patent uses volatile organic compounds as intermediary substances that carry information about insect presence, life stage, and infestation level. By detecting these chemical mediators directly in the headspace or product matrix, the system translates biological information into measurable chemical signals, bypassing the variability inherent in trap-based mechanical capture methods
2Loss of time
If traditional inspection methods are used to detect insect infestations, then some level of monitoring is achieved, but detection is delayed until infestations are advanced, causing significant economic losses
Solution Approach 1:
The system performs preliminary detection by continuously monitoring for volatile organic compounds associated with early-stage infestations, including eggs and larvae that have not yet produced detectable trap signals. By detecting chemical signatures before visual or trap-based methods can identify infestations, the system enables early intervention and prevents economic losses associated with advanced infestations
Solution Approach 2:
The invention replaces mechanical inspection methods (flashlight inspection, trap monitoring) with chemical sensing technology. VOC sensors detect volatile organic compounds emitted by insects at all life stages, providing continuous, non-invasive monitoring that substitutes manual or mechanical detection with automated chemical analysis, enabling earlier and more reliable infestation detection
3Measurement precision
If VOC sensors are used to detect insect markers, then early and accurate detection of infestations is enabled, but the system requires heating the sensors to operating temperature and maintaining controlled measurement conditions
Solution Approach 1:
The VOC sensor platform serves multiple functions: detecting different insect species, identifying life stages (eggs, larvae, adults), and quantifying infestation levels, all through a single sensor system. The heating mechanism and measurement protocol are universally applied across different detection targets, reducing operational complexity despite the sophisticated detection capabilities
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 early detection of insect infestations with high sensitivity and selectivity, reducing economic losses by identifying threats quickly and accurately, and minimizing the impact of environmental and mobility factors.
Implementation Method 1
determining a set of conductance change values corresponding to each of the one or more VOC sensors contacted with the target fluid flow
Data Source
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AI summary
Minimal-cost, high-accuracy, and portable devices used to detect the presence of insects at all stages of life, including in the egg stage, in stored products by sensing gas phase markers such as volatile pheromones, semiochemicals, and kairomones. The methods, devices, and systems disclosed herein utilize a sensor array configured to simultaneously measure a plurality of target markers and filter background gases while remaining compact, highly accurate, and easy to operate.