Mold Detection via Electrical Impedance on Growth Substrate
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Solution Overview
Problem
Current methods for detecting mold are labor-intensive, expensive, and require laboratory analysis, making them inefficient for continuous monitoring and early detection, especially since mold growth can be invisible and widespread without causing immediate health or structural issues.
Innovation Solution
A mold detecting device with a sensing system that measures electrical properties on a growth surface with conductive contacts, applying a voltage and measuring impedance changes to detect mold growth, allowing for continuous monitoring and identification of mold types without the need for laboratory samples.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional laboratory analysis methods are used to detect mold, then accurate identification of mold types is achieved, but the process becomes labor-intensive, expensive, and time-consuming
Solution Approach 1:
The patent replaces the mechanical/optical system of microscope-based visual inspection with an electrical sensing system. Electrical contacts measure impedance changes caused by mold growth on the substrate, eliminating the need for laboratory equipment, experts, and manual sample analysis while providing continuous automated monitoring
Solution Approach 2:
The detection system uses the mold growth itself as the sensing mechanism. As mold grows on the substrate between electrical contacts, it naturally changes the electrical impedance, which is directly measured by the system. The mold growth serves both as the target of detection and the source of the detection signal
2Ease of operation
If visual inspection methods are used to detect mold, then readily visible mold can be identified, but invisible mold growth goes undetected
Solution Approach 1:
The patent introduces an intermediary substrate with electrical contacts that indirectly detects mold growth. Instead of directly observing mold spores or colonies, the system measures electrical impedance changes caused by the mold's presence and growth on the substrate, making invisible mold detectable through electrical property changes
3Loss of time
If continuous monitoring is implemented to detect mold early, then early detection capability is improved, but the cost and complexity of the system increases
Solution Approach 1:
The patent enables continuous monitoring by maintaining electrical contacts with the growth substrate at all times. The system continuously measures impedance between contacts, providing uninterrupted detection of mold growth without requiring periodic sampling or laboratory analysis, thus achieving early detection with minimal time loss
Solution Approach 2:
The electrical sensing system serves multiple functions: it detects the presence of mold, monitors growth over time, and can identify different mold types based on their distinct electrical signatures. This multi-functionality is achieved through a single integrated system rather than requiring separate devices for each function
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 mold growth, continuous monitoring, and identification of mold types, reducing costs and labor while improving response times to potential health and structural issues.
Implementation Method 1
The mold detecting device is configured to measure an impedance across the conductive contacts that is changed by mold growth on the growth surface
Implementation Method 2
The controller is programmed to apply a voltage across pairs of the electrical contacts and measure a current passing through the electrical contacts
Data Source
AI summary
A mold sensor is configured with an enclosed chamber in which a nutrient-treated substrate is positioned. The mold sensor includes a sensor for measuring electrical properties of the substrate. The substrate includes conductive elements to interface with a controller to measure the electrical properties. The controller operates the sensor and is programmed to detect a presence of mold growing in the chamber based on the electrical properties.