Bridge Displacement Phase Analysis Under Non-Uniform Temperature
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Solution Overview
Problem
Existing bridge displacement analysis methods, such as PS-InSAR, inaccurately estimate temperature-related parameters due to non-uniform temperature distributions in objects like water pipe bridges, leading to reduced displacement calculation accuracy.
Innovation Solution
An information processing apparatus and method that calculates phase differences in multiple directions, incorporating time-series and spatial temperature changes to evaluate time-series and spatial temperature difference parameters, improving displacement estimation accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If PS-InSAR analysis uses overall temperature uniform assumption, then the analysis process is simple, but the displacement calculation accuracy deteriorates for objects with non-uniform temperature distribution
Solution Approach 1:
The patent segments the temperature field into multiple spatial components (time-series temperature component and spatial temperature component) rather than treating it as a uniform whole. This segmentation allows the system to model non-uniform temperature distributions by combining multiple temperature components, thereby improving displacement calculation accuracy while maintaining manageable computational complexity through modular processing.
2Measurement precision
If multiple temperature components are introduced to model non-uniform temperature distribution, then displacement calculation accuracy improves, but the analysis complexity increases
Solution Approach 1:
The patent transforms the temperature parameter from a single uniform value to multiple independent temperature components (time-series temperature and spatial temperature). Each component is modeled with specific parameters that capture different aspects of temperature variation. This parameter transformation enables accurate representation of non-uniform temperature distributions while allowing systematic estimation through separate parameter optimization processes.
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
Enhances the calculation accuracy of bridge displacements by accounting for non-uniform temperature distributions, enabling precise displacement measurements in infrastructure monitoring.
Implementation Method 1
radio waves are emitted from an artificial satellite toward a bridge at a set interval, and reflected waves are received
Implementation Method 2
the phase difference between the reflected waves is calculated by the interference processing
Implementation Method 3
the behavior of thermal expansion and thermal contraction may be different between the bridge axial direction and the vertical direction due to a difference in temperature of each member
Data Source
AI summary
An information processing apparatus acquires irradiation direction phase difference data indicating a displacement amount in an irradiation direction of an object, calculates a phase difference in a first direction by using a time-series temperature change in the object and a time-series temperature difference parameter and calculates a projection value of the calculated phase difference in the irradiation direction, calculates a phase difference in a second direction by using a spatial temperature difference generated in the second direction and a spatial temperature difference parameter and calculates a projection value of the calculated phase difference in the irradiation direction, and a evaluates the time-series temperature difference parameter and the spatial temperature difference parameter by using a difference between a displacement amount estimated from the two calculated projection values and a displacement amount indicated by the irradiation direction phase difference data.