Elastic Wave Vehicle Estimation for Concrete Slab Comparison
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Solution Overview
Problem
Comparing different measurement results of concrete floor slabs requires understanding vehicle information at a measurement target location, as varying traffic conditions and measurement times can lead to inconsistent results.
Innovation Solution
A vehicle information estimation system that includes sensors detecting elastic waves generated by passing vehicles and a signal processor estimating the number of vehicles, weights, and speeds using these elastic waves, allowing for normalized comparison of measurement results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If measurement is performed for a longer time to increase the density of generation sources, then the measurement precision improves, but the loss of time increases
Solution Approach 1:
The patent replaces the mechanical approach of extending measurement time to increase data density with an acoustic field-based approach. By analyzing the spatial distribution and characteristics of elastic waves in the acoustic field, the system can estimate vehicle information and calculate equivalent density metrics without requiring prolonged measurement periods, thus resolving the contradiction between measurement precision and time consumption.
2Measurement precision
If measurement is performed at a place with larger traffic volume to improve statistical significance, then the measurement precision improves, but the adaptability to different locations deteriorates
Solution Approach 1:
The patent transforms the measurement results by calculating equivalent traffic volumes and normalizing density values based on actual vehicle passage data. This parameter transformation allows measurement results from locations with different traffic volumes to be converted to a common reference basis, enabling fair comparison across diverse locations while maintaining the statistical significance gained from high-traffic measurements.
3Measurement precision
If traffic volume information is collected and analyzed to enable comparison of measurement results, then the measurement precision improves, but the device complexity increases
Solution Approach 1:
The patent integrates multiple functions into the existing acoustic emission measurement system. The same sensor array and signal processing infrastructure used for detecting elastic waves is also utilized for estimating vehicle information such as passage count, speed, and weight. This multi-functional approach enables traffic volume analysis and measurement result normalization without requiring separate dedicated systems, thereby limiting the increase in device complexity.
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 accurate estimation of vehicle information, allowing for effective comparison of measurement results under standardized conditions, thereby improving the evaluation of concrete floor slab soundness.
Implementation Method 1
at least one sensor detects elastic waves generated from a structure
Data Source
AI summary
According to one embodiment, a vehicle information estimation system according to an embodiment includes at least one sensor and a vehicle count estimator. The at least one sensor detects elastic waves generated from a structure. The vehicle count estimator estimates the number of vehicles that have passed through on the structure using the elastic waves detected by the at least one sensor.