Defect Position Identification Using Multi-Camera Spatial Integration
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Solution Overview
Problem
Existing techniques for evaluating concrete deterioration by optical measurement often struggle to accurately identify defect locations, making it difficult to pinpoint the areas requiring evaluation.
Innovation Solution
An operating device and method that utilize a relative positional relationship calculator and a measured position calculator, combining data from optical devices like cameras and hyperspectral cameras to determine the precise location and attitude of defects within three-dimensional coordinates, allowing for accurate identification of defect positions based on exterior orientation parameters and physical characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If optical measurement techniques are used for concrete deterioration evaluation, then measurement capability is improved, but defect location identification becomes difficult
Solution Approach 1:
The patent combines multiple measurement devices (optical device for surface imaging and measuring device for physical characteristics) into a unified measurement system. The position calculator integrates data from both devices with their respective positional relationships to the object, merging the capabilities to detect both deterioration and locate defects precisely.
Solution Approach 2:
The patent introduces a position calculator as an intermediary component that processes and integrates positional information from multiple sources. This calculator receives data from the optical device, measuring device, and external position information, then computes the precise location of measured points on the object, acting as a mediator that connects measurement data with spatial location.
2Adaptability or versatility
If multiple measurement devices are used to obtain both optical and physical characteristic data, then measurement comprehensiveness is improved, but device complexity increases
Solution Approach 1:
The patent creates a universal measurement system where the position calculator serves multiple functions: it calculates positions for both the optical device and measuring device, integrates data from different measurement types, and provides comprehensive positional information for various deterioration evaluation needs. This multi-functional approach reduces the need for separate processing systems for each measurement type.
Solution Approach 2:
The patent segments the measurement system into distinct functional components: an optical device for surface imaging, a measuring device for physical characteristics, and a position calculator for integration. Each component has a specific function, and the position calculator receives segmented data from both measurement devices along with their respective positional relationships, processing them separately before integrating the results.
3Measurement precision
If exterior orientation parameters are preliminarily determined for the measuring device, then measurement accuracy is improved, but preparation time increases
Solution Approach 1:
The patent applies preliminary action by determining the external orientation parameters of the measuring device in advance, before actual measurement takes place. This pre-determination of positional relationships between the measuring device and the object allows for faster real-time position calculations during measurement, as the transformation parameters are already established.
Data Source
AI summary
A position at which evaluation of a defect was performed is easily identified. Relative positional relationships between three-dimensional coordinates of feature points of a photographed object and positions of a panoramic camera 111 are calculated based on a moving image, which is photographed by the panoramic camera 111 while a vehicle 100 travels. The position of the object photographed by a hyperspectral camera 114 is calculated based on the relative positional relationships and exterior orientation parameters of the hyperspectral camera 114 with respect to the panoramic camera 111.