Conduit Impedance Sensing for Submerged Corrosion Detection
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Solution Overview
Problem
Conduits in submerged or subterraneous environments face challenges in detecting corrosion and moisture ingress due to difficulty in reaching and assessing the condition of the conduit, which can lead to damage and short-circuits.
Innovation Solution
A device comprising a first electrode and a second electrode, enclosed by a mounting unit forming a dielectric, measures impedance to detect corrosion and moisture by utilizing a capacitor configuration with a constant first impedance component and a variable second component influenced by the insulator layer and environment, allowing for accurate detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional inspection methods are used to detect corrosion and moisture in submerged conduits, then the conduit can be monitored for degradation, but the inspection process becomes difficult and costly due to the hard-to-reach locations
Solution Approach 1:
The conduit system performs self-diagnosis by using the conduit itself as part of the measurement circuit. The measurement device attaches externally to the conduit and uses the conduit's electrical properties to detect corrosion and moisture, eliminating the need for physical inspection of hard-to-reach locations.
Solution Approach 2:
The patent replaces mechanical inspection methods with electrical measurement. Instead of physically examining the conduit for corrosion and moisture, the system uses electrical impedance measurements to detect changes in the conduit's condition, making inspection feasible in submerged environments.
2Measurement precision
If electrical measurement devices are installed on submerged conduits, then accurate detection of corrosion and moisture is achieved, but the device complexity increases
Solution Approach 1:
The measurement device is divided into separate functional components: electrodes for electrical contact, a mounting unit for secure attachment to the conduit, and a measurement instrument for data acquisition. This segmentation allows each component to be optimized independently and simplifies the overall system design.
Solution Approach 2:
The measurement device serves multiple functions: it detects both corrosion and moisture ingress, can be applied to different conduit types, and provides long-term monitoring capability. The mounting unit with enclosure design makes the device universally applicable to various conduit configurations.
3Device complexity
If the conduit is left without protective coating, then the device complexity is reduced, but the conduit becomes vulnerable to oxidation and moisture ingress
Solution Approach 1:
The patent introduces an insulator layer as an intermediary between the conduit and the environment. This layer provides protection against corrosion and moisture ingress while allowing electrical measurements to detect its integrity. The mounting unit with enclosure forms another intermediary protective barrier during measurement.
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 accurate and cost-effective detection of corrosion and moisture, with enhanced accuracy and ease of use, even in hard-to-reach locations, by wirelessly transmitting data through the environment.
Implementation Method 1
a mounting unit configured to be arranged on a surface of the conduit and to create an enclosure against the surface, said enclosure containing the first electrode and configured to form a dielectric between the first electrode and the environment
Implementation Method 2
a measurement instrument configured to determine a value which is representative of an impedance between the first electrode and the second electrode
Data Source
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AI summary
Figure 1 illustrates a device (100) for measuring a conduit (10), wherein the conduit is arranged in a submerged or subterraneous environment (E) and is surrounded by an insulator layer, wherein the device comprises: - a first electrode (120); - a mounting unit (110) configured to be arranged on a surface of the conduit (10) and to create an enclosure against the surface, said enclosure containing the first electrode (120) and configured to form a dielectric between the first electrode (120) and the environment (E); - a second electrode (130) configured to be arranged at a distance of the surface and at a distance of the first electrode (120), wherein the second electrode (130) is intended to be in contact with the environment; - a measurement instrument (140) configured to determine a value which is representative of an impedance between the first electrode and the second electrode.