VOC Sensor Array for Insect Larvae Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for detecting stored product insects (SPIs) are inefficient due to variability in pheromone trap data, which is affected by temperature, human activity, and insect dynamics, leading to unreliable detection and remediation of infestations, especially for the Indianmeal moth, which has developed resistance to pesticides.
Innovation Solution
A device with a sensor array comprising VOC sensors that detect target volatile organic compounds (VOCs) in air samples, using a substrate with a resistive heater circuit and chemically sensitive film, allowing for high-accuracy detection of insect infestations by measuring conductance changes to determine gas component concentrations, thereby reducing dependency on insect mobility and environmental factors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If pheromone traps with synthetic lures are used to detect stored product insects, then insect activity can be captured, but the detection reliability deteriorates due to temperature effects, human activity interference, and insect dynamics variability
Solution Approach 1:
The patent replaces the mechanical/biological pheromone trap system with an electronic sensor array system that directly detects volatile organic compounds. The sensor array uses electronic sensors with specific net conductance values to measure VOC concentrations, eliminating the need for physical traps and synthetic lures. This substitution resolves the reliability issues caused by environmental factors affecting trap performance.
Solution Approach 2:
The patent changes the detection parameter from counting trapped insects (which varies with temperature, human activity, and insect behavior) to measuring VOC concentrations through sensor conductance. By monitoring the specific net conductance values of sensors exposed to different VOCs, the system achieves consistent detection independent of environmental conditions and insect mobility patterns.
2Productivity
If trap sampling methods are used to monitor insect populations, then some detection data can be obtained, but the measurement precision deteriorates due to small sampling representation (2-10% or less of population)
Solution Approach 1:
The patent replaces physical trap sampling with electronic sensor detection of volatile compounds. Since VOCs are emitted by insects and disperse through the air, the sensor array can detect the chemical signature of the entire insect population without physically capturing a sample. This eliminates the sampling limitation and provides a more comprehensive measurement of infestation levels.
3Object-generated harmful factors
If pesticide applications are used to control stored product insects, then pest populations can be reduced, but the effectiveness deteriorates due to insect resistance development (e.g., 60,000-fold resistance to Malathion in Indianmeal moths)
Solution Approach 1:
The patent replaces chemical pesticide control with early detection through VOC sensing. By detecting the presence and concentration of insect volatile compounds, the system enables timely identification of infestations before populations establish. This allows for non-chemical intervention strategies and prevents the development of pesticide resistance.
Solution Approach 2:
The patent implements preliminary detection of insect infestations through continuous monitoring of VOC emissions. By detecting insects at early stages through their chemical signatures, the system enables preventive action before infestations grow large enough to require pesticide application, thereby avoiding the resistance problem entirely.
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 device provides real-time, non-invasive, and high-accuracy detection of insect larvae semiochemicals and adult insect pheromones, enabling the identification of infestations with minimal cost and widespread application, including pinpointing infestation locations within structures.
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
Implementation Method 2
heating one or more of the plurality of VOC sensors to at least a first operating temperature
Data Source
AI summary
Minimal-cost, high-accuracy, and portable devices used to detect the presence of insect larvae and adult insects 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.