Corrosion Sensor Differential Bridge Circuit Real-Time Detection
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Solution Overview
Problem
Electronic devices are susceptible to corrosion from atmospheric contaminants, pollutants, and humidity, leading to increased service calls, warranty costs, and data loss, as existing technologies lack effective early warning systems for detecting corrosion in real-time.
Innovation Solution
A corrosion sensor employing a differential bridge circuit layout is used to detect corrosion events by exposing a corrosion coupon to ambient conditions, allowing for real-time monitoring and issuance of warnings before damage occurs, with conductive paths covered by corrosion-resistant materials to prevent dendritic growth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If electronic devices are exposed to ambient conditions for normal operation, then they can perform their intended functions, but they become susceptible to corrosion from atmospheric contaminants, pollutants, and humidity
Solution Approach 1:
The device separates conductive paths into two distinct groups: exposed paths that contact the ambient environment to detect corrosion, and protected paths that are isolated from the environment to maintain stable reference resistance values. This segmentation allows the device to operate in ambient conditions while using the protected paths as references to detect changes in the exposed paths caused by corrosion
Solution Approach 2:
The patent introduces an isolated environment (protected conductive paths) as an intermediary reference system. These protected paths serve as a stable baseline that mediates the comparison against exposed paths, enabling detection of corrosion effects without the reference itself being affected by environmental factors
2Reliability
If corrosion-resistant materials are applied to all conductive paths, then dendritic growth is prevented, but the ability to detect corrosion events is lost
Solution Approach 1:
The patent applies different properties to different parts of the conductive path system: some paths are covered with corrosion-resistant material to prevent dendritic growth and provide stable references, while other paths are left exposed to detect corrosion events. This local differentiation of protective properties enables both reliability and detection capability to coexist
3Reliability
If early warning detection is implemented, then damage prevention is enabled, but additional circuitry and monitoring systems are required
Solution Approach 1:
The patent combines the corrosion detection functionality with the existing operational circuitry by using the same conductive paths that carry current during normal operation. The bridge circuit configuration merges the reference and measurement functions into a single integrated structure, eliminating the need for separate dedicated sensing elements and reducing overall system complexity
Solution Approach 2:
The conductive paths serve multiple functions: they conduct current during normal device operation and simultaneously serve as sensors for detecting corrosion events. The protected paths provide both electrical references for operation and stable reference values for corrosion measurement, enabling early warning detection without adding dedicated monitoring components
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 effectively detects corrosion in real-time, providing an early warning to prevent damage to electronic devices and systems, reducing service calls and data loss by monitoring changes in electrical resistance and ambient conditions.
Implementation Method 1
The first and fourth conductive paths are exposed to conditions of an ambient environment... to detect corrosion events (e.g., corrosion rate and/or a total amount of corrosion that has occurred)
Data Source
AI summary
Circuits, systems and methods are provided that may be implemented using a corrosion sensor that employs a differential bridge circuit layout to detect corrosion events occurring to corrosion-sensitive components such as exposed electronic circuits. In one possible implementation, a detection circuit may be coupled to a corrosion coupon that includes the differential bridge circuit layout, and that is exposed to corrosive conditions such as ambient atmospheric conditions that contain contaminants (e.g., pollutants), humidity, particulates, etc.; as well as varying temperatures.