Corrosion Sensor Using Segmented Metal Structures
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Solution Overview
Problem
Existing methods for detecting atmospheric corrosion in electrical devices are limited by their sensitivity and accuracy, particularly in varying environmental conditions, leading to inconsistent detection of corrosion progression.
Innovation Solution
A method involving multiple metal structures with equal dimensions and material, acting as sensing elements, is used to monitor the electrical state and assess corrosion damage statistically, allowing for early detection and prediction of corrosion progression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional corrosion sensors with metal films of different widths are used, then corrosion detection is possible, but the sensor is optimized only for low corrosion rates and cannot accurately detect corrosion in aggressive atmospheres
Solution Approach 1:
The sensing element is divided into multiple metal structures with different dimensions (lengths, widths, or areas) rather than using a single metal film. Each metal structure responds to corrosion independently, allowing the system to detect corrosion rates across a broader range by analyzing the differential response of multiple structures.
Solution Approach 2:
Instead of varying only the width of a single metal film, the invention introduces multiple dimensions of variation by creating multiple metal structures with different combinations of length, width, and area. This multi-dimensional approach enables the sensor to detect corrosion across different rates and conditions simultaneously.
2Measurement precision
If metal films with progressively increasing widths are used, then corrosion progression can be monitored, but the sensor complexity increases and manufacturing becomes more difficult
Solution Approach 1:
The sensing element is segmented into multiple independent metal structures that can be manufactured separately and then integrated onto the substrate. This segmentation allows for simpler individual manufacturing of each metal structure while maintaining the overall functionality of monitoring corrosion progression through differential responses.
3Measurement precision
If reference sensor elements are added to compensate for environmental factors, then measurement accuracy improves, but the device complexity and cost increase
Solution Approach 1:
Multiple metal structures with different dimensions serve multiple functions simultaneously: they act as both the primary sensing elements for corrosion detection and as mutual references to each other. The differential response between structures of different sizes provides inherent compensation for environmental factors like temperature and humidity, eliminating the need for separate reference sensor elements.
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
This approach enables early detection of atmospheric metal corrosion, allowing for predictive maintenance and preventing critical failures, while also identifying areas prone to corrosion within electrical devices.
Implementation Method 1
Atmospheric corrosion is an electrochemical process of degradation of materials exposed to corrosive atmosphere
Implementation Method 2
The corrosion sensor operates such that the resistance of each metal film is measured. Its resistance depends on its spatial dimensions; therefore an atmospheric corrosion influences the metal film spatial dimensions and changes its resistance.
Data Source
AI summary
A method of detecting atmospheric corrosion for electrical devices includes monitoring of an electrical state of plurality of metal structures operating as sensing elements embedded in a corrosion sensor. All metal structures have equal dimensions and are made of the same material with the same chemical structure and are placed on non-conductive substrate and located in electrical device. Each metal structure works as single sensing element and its electrical state is monitored. What is more, monitoring of the electrical state of metal structures comprises an assessment of how many of the metal structures have been damaged due to corrosion. The progress of corrosion is assessed by comparison of number of damaged metal structures to threshold values.