Structural Deterioration Assessment Using Surface and Ground Displacement
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Solution Overview
Problem
Existing methods for determining the deterioration of structures, such as roads, are inaccurate as they primarily focus on surface unevenness and do not account for ground displacement, which can lead to hidden deterioration.
Innovation Solution
A deterioration determination system that combines sensor information from mobile devices and synthetic aperture radar to assess both the surface layer and ground displacement, allowing for more accurate determination of structural deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If only surface unevenness measurement is used to determine deterioration, then the measurement process is simple and cost-effective, but the determination accuracy is insufficient because ground displacement is not detected
Solution Approach 1:
The patent combines surface unevenness measurement (using accelerometers or similar sensors on vehicles) with ground displacement measurement (using InSAR technology) into a unified deterioration determination system. This merging allows the system to leverage both measurement approaches, achieving high accuracy in detecting both surface-level and subsurface deterioration while maintaining operational efficiency through integrated data processing
2Measurement precision
If ground displacement measurement is added to surface measurement, then deterioration determination accuracy is improved, but the device complexity and cost increase
Solution Approach 1:
The patent segments the deterioration determination process into two independent measurement channels: surface unevenness measurement conducted by mobile vehicles equipped with sensors, and ground displacement measurement conducted by satellite-based InSAR systems. Each segment operates independently with its own optimal methodology, and the results are subsequently integrated. This segmentation maintains operational simplicity for each measurement type while achieving comprehensive accuracy through combination
3Area of stationary object
If only passing point measurement is used, then the measurement cost is reduced, but the information coverage of the structure is insufficient
Solution Approach 1:
The patent introduces ground displacement data as an intermediary that bridges the gap between limited surface measurement points and the need for comprehensive structure assessment. The InSAR-derived ground displacement field provides continuous spatial coverage information that interpolates between discrete vehicle passing points, enabling extrapolation of deterioration patterns to areas not directly traversed by measurement vehicles
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
Improves the accuracy of deterioration assessment by distinguishing between surface and ground-based deterioration, enabling better planning and repair strategies.
Implementation Method 1
generating the determination result of the displacement of the ground surface using an observation result of a synthetic aperture radar
Data Source
AI summary
A deterioration determination device includes: a memory; and at least one processor coupled to the memory. The processor performs operations. The operations include: acquiring a diagnosis result of first deterioration of a structure and a determination result of displacement of a ground surface including the structure; determining second deterioration of the structure using the diagnosis result of the first deterioration and the determination result of the displacement of the ground surface; and outputting the second deterioration and a position of the second deterioration.