Deterioration Assessment Using SAR Screening and Sensor Pinpointing
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Solution Overview
Problem
Existing techniques using Synthetic Aperture Radar (SAR) for assessing structure deterioration have a spatial resolution of several meters, which is insufficient to detect smaller deteriorations such as cracks and potholes on road surfaces.
Innovation Solution
A deterioration assessment system and method that combines SAR for ground surface displacement analysis with sensor information from moving bodies to extract detailed positions and assess deterioration using higher spatial resolution sensor data, including images and accelerations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If SAR is used to assess ground surface displacement, then large-area coverage is achieved, but spatial resolution is insufficient to detect detailed deterioration
Solution Approach 1:
The patent segments the assessment process into two stages: first using SAR for large-area screening to identify regions with ground displacement, then using high-resolution sensors (cameras, LiDAR) to detect detailed deterioration features within those specific regions. This segmentation allows the system to achieve both large coverage and high measurement precision by applying different measurement methods to different spatial scales.
2Measurement precision
If high spatial resolution sensors are used to detect detailed deterioration, then measurement precision is improved, but coverage area and efficiency are reduced
Solution Approach 1:
The patent applies preliminary action by first performing low-resolution SAR-based ground displacement assessment over large areas to identify regions requiring detailed inspection. This preliminary screening step filters out areas without deterioration risks, allowing high-resolution sensors to be deployed only where needed, thus maintaining high measurement precision while improving overall coverage efficiency.
3Measurement precision
If detailed deterioration assessment is performed across the entire structure, then measurement precision is maximized, but time and resource consumption increase
Solution Approach 1:
The patent implements local quality by concentrating high-resolution assessment resources on specific local regions where ground displacement has been detected, rather than uniformly applying detailed assessment across the entire structure. This allows the system to achieve high measurement precision for deteriorated areas while minimizing time and resource consumption in stable regions.
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 detailed assessment of structure deterioration by integrating SAR displacement data with higher resolution sensor information, providing precise positioning and assessment of cracks and other surface issues.
Implementation Method 1
a technique for measuring a structure on the ground, a technique for measuring a state of a ground surface using 'Synthetic Aperture Radar (SAR)' is known
Data Source
AI summary
A deterioration assessment device includes: a memory; and at least one processor coupled to the memory. The processor performs operations. The operations include: acquiring information on displacement of a ground surface; extracting a position at which sensor information used for assessment of deterioration is acquired based on the information on the displacement of the ground surface; and outputting the extracted position.