Steel Deck Bridge Evaluation Device Frequency Component Removal
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Solution Overview
Problem
Conventional image diagnostics methods for steel deck bridges cannot distinguish between damage to or deterioration of the surface layer asphalt, mastic asphalt, and the steel deck, requiring qualitative evaluation by a professional engineer, which is difficult to interpret without specialist knowledge and does not account for the extensive repair needed for steel deck damage caused by mastic asphalt deterioration.
Innovation Solution
A steel deck bridge evaluation device and method that acquires reflected response data to electromagnetic waves, removes specific frequency components, and evaluates damage using peak measurement values, enabling quantitative assessment of mastic asphalt and steel deck deterioration by comparing peak values to reference values, with options for proportional evaluation and threshold-based determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional image diagnostics methods are used to evaluate steel deck bridges, then damage detection is possible, but the method cannot distinguish between damage to surface layer asphalt, mastic asphalt, and steel deck
Solution Approach 1:
The patent segments the reflected response frequency distribution into distinct frequency components corresponding to different structural layers. By removing frequency components associated with the surface layer (first frequency component) and steel deck (second frequency component), the method isolates and identifies damage in the mastic asphalt layer specifically, enabling precise location identification of damage within the multi-layer structure.
2Measurement precision
If conventional image diagnostics are used, then damage can be visualized, but qualitative evaluation requires professional engineers and is difficult to interpret without specialist knowledge
Solution Approach 1:
The patent transforms the complex qualitative image interpretation into quantitative parameter measurement. By extracting peak measurement values from the reflected response frequency distribution and comparing them against reference values, the system converts subjective expert judgment into objective numerical metrics that are easier to interpret and automate, reducing dependency on specialist knowledge while maintaining evaluation accuracy.
3Measurement precision
If conventional methods are used, then damage detection is achieved, but it does not account for the extensive repair needed for steel deck damage caused by mastic asphalt deterioration
Solution Approach 1:
The patent extracts and removes the frequency components corresponding to the steel deck (second frequency component) from the reflected response frequency distribution. This extraction process isolates the signal characteristics specific to the mastic asphalt layer, enabling the system to identify not only the presence of damage but also its location and severity, providing critical information about the cause and extent of potential steel deck corrosion risks.
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 quantitative evaluation of damage to both mastic asphalt and steel decks, allowing for precise identification of deteriorated areas and facilitating targeted repairs, reducing the risk of steel deck corrosion from mastic asphalt issues.
Implementation Method 1
a first frequency component obtained by reflection of the electromagnetic wave at the surface of the steel deck bridge and a second frequency component obtained by reflection of the electromagnetic wave at the steel deck
Data Source
AI summary
A steel deck bridge evaluation device includes a processor configured to acquire reflected response data relating to a reflected response to an electromagnetic wave irradiated through a surface of a deck in a depth direction of the deck, remove a first frequency component obtained by reflection of the electromagnetic wave at a surface of the deck and a second frequency component obtained by reflection of the electromagnetic wave at a steel deck from a reflected response frequency distribution of the reflected response expressing the reflected response data, and evaluate damage to or deterioration of the deck using a peak measurement value that is a peak value of a frequency component level corresponding to a specific frequency or higher, in the reflected response frequency distribution from which the first frequency component and the second frequency component have been removed.