Hollow Structure Crack Detection via Internal Pressure Monitoring
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Solution Overview
Problem
Current structural health monitoring methods for civil engineering structures, particularly hollow structures, face challenges in cost-effectiveness and long-term reliability, especially in coastal and offshore regions, where traditional methods like X-ray and ultrasonic techniques are not suitable for direct application.
Innovation Solution
A method and apparatus for long-term monitoring of hollow structures using internal fluidic pressure measurement, where a pressure sensor detects changes in fluidic pressure within closed compartments to indicate through thickness cracks, allowing for continuous monitoring over extended periods with minimal maintenance and wide applicability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional monitoring methods like X-ray and ultrasonic techniques are used, then detection capability is improved, but cost-effectiveness and long-term reliability deteriorate
Solution Approach 1:
The patent replaces complex mechanical monitoring systems (X-ray, ultrasonic techniques) with a simple pressure-based monitoring system. By establishing internal fluidic pressure in the hollow structure and monitoring pressure changes, the system detects through-thickness cracks without requiring expensive and complex imaging equipment, thereby improving cost-effectiveness while maintaining detection capability.
2Measurement precision
If complex monitoring systems are deployed, then detection precision is improved, but device complexity and maintenance costs increase
Solution Approach 1:
The patent extracts the essential detection function from complex monitoring systems and isolates it to a simple pressure change detection mechanism. By removing unnecessary components and focusing only on the critical function of detecting pressure changes caused by cracks, the system achieves high detection precision with minimal device complexity.
Solution Approach 2:
The patent employs simple, inexpensive pressure sensors instead of expensive, complex monitoring equipment. These basic pressure sensors can be easily replaced if needed, reducing both initial investment and long-term maintenance costs while maintaining effective crack detection capability.
3Measurement precision
If traditional monitoring methods are applied, then initial detection capability is improved, but long-term monitoring reliability deteriorates
Solution Approach 1:
The patent establishes continuous internal fluidic pressure within the hollow structure, enabling uninterrupted monitoring over extended periods. The constant pressure state allows the system to detect cracks at any time without requiring periodic re-initialization or complex recalibration, ensuring both high initial detection capability and sustained long-term monitoring reliability.
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 provides cost-effective, reliable, and long-term monitoring capabilities for a variety of civil engineering structures, including offshore installations, with enhanced sensitivity and reduced maintenance costs, enabling early detection of through thickness cracks and preventing damage.
Implementation Method 1
monitoring the internal fluidic pressure in order to detect a change of the internal fluidic pressure indicating a through thickness crack in the compartment
Data Source
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AI summary
Suggested are: a method and using the method for long-term monitoring of a civil engineering structure, the civil engineering structure comprising at least one hollow element comprising an internal closed compartment, the method comprising: Establishing an internal fluidic pressure in the compartment; Monitoring the internal fluidic pressure in order to detect a change of the internal fluidic pressure indicating a through thickness crack in the compartment, wherein long term monitoring comprises monitoring over at least two weeks, preferably over 1 month, more preferably over 1 year, especially over periods extending five years; an apparatus for long term monitoring of a civil engineering structure comprising a hollow structure, the hollow structure comprising at least one closed internal compartment, the apparatus comprising: a pressure sensor, adapted to measure an internal fluidic pressure in the compartment; a controller for recording and comparing the internal pressure with an established pressure or with a given threshold value, the controller being adapted to detect a through thickness crack in the compartment by a change of the internal fluidic pressure; and a TTC detection method for a grounding structure comprising at least one internal closed compartment, the TTC detection method comprising: Establishing an internal fluidic pressure in the internal closed compartment; Monitoring the internal fluidic pressure over at least two weeks, preferably over 1 month, more preferably over 1 year, especially over periods extending five years; Detecting a change of the internal target pressure indicating a through thickness crack in the at least one closed compartment.