Structural Degradation Detection via Deflection-Displacement Feature Analysis
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Solution Overview
Problem
Existing methods for determining the degradation state of structures, such as bridges and tunnels, rely on either deflection amount or surface distortion, leading to inaccurate inspections as they do not consider the relationship between these two factors.
Innovation Solution
A state determination apparatus and method that measures both deflection amount and surface displacement in multiple target regions, calculates feature values indicating their relationship, and determines the degradation state based on the spatial distribution of these values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If only deflection amount is used to detect abnormality, then the inspection method is simple, but the detection accuracy is insufficient
Solution Approach 1:
The patent combines multiple measurement parameters (deflection amount and surface displacement amount) into a unified inspection system. By merging these different types of data and analyzing their relationships, the system achieves higher detection accuracy while maintaining reasonable complexity through integrated processing.
2Device complexity
If only surface distortion is measured to assess fatigue, then the measurement process is simple, but the inspection accuracy is insufficient
Solution Approach 1:
The patent merges surface displacement measurement with deflection amount measurement, combining two previously separate simple measurement approaches into an integrated system that achieves superior inspection accuracy through the analysis of relationships between the measurements.
3Measurement precision
If both deflection amount and surface distortion are used for inspection, then the detection accuracy improves, but the complexity of conducting an appropriate inspection increases
Solution Approach 1:
The patent transforms the inspection approach by changing from analyzing individual parameters separately to analyzing the relationship between parameters. By calculating feature values that represent the relationship between deflection amount and surface displacement amount, the system manages complexity through parameter transformation and spatial distribution analysis.
Data Source
AI summary
A state determination apparatus 100 determines the state of a structure 200. The state determination apparatus 100 includes a measurement unit 10 configured to measure a deflection amount and a surface displacement amount in each of a plurality of target regions that are preset on the structure 200, a feature value calculation unit 20 configured to calculate, for the respective target regions, feature values each indicating a relationship between the deflection amount and the surface displacement amount, using the measured deflection amount and surface displacement amount, a spatial distribution calculation unit 30 configured to calculate a spatial distribution of the feature values using the feature values calculated for each of the target regions, and a degradation state determination unit 40 configured to determine a degradation state of the structure 200 based on the spatial distribution of the feature value.