Rail Installation State Determination via Curved Section Vibration Exclusion
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Solution Overview
Problem
Existing rail installation state determination systems face inaccuracies due to the use of inappropriate data from vibration sensors, sound level sensors, and current sensors, which can degrade the determination accuracy.
Innovation Solution
A rail installation state determination system that includes a vibration database, a preprocessor performing curved section exclusion, and a determiner to analyze vibration data after preprocessing, excluding data from curved sections where vibrations are independent of the rail's installation state, and sorting data from normal, junction, and branching areas to improve accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If vibration data from all sections (including curved sections) is used for determination, then more data is available for analysis, but determination accuracy degrades due to irrelevant vibrations
Solution Approach 1:
The rail path is segmented into straight sections and curved sections. The preprocessor identifies and separates vibration data from curved sections, excluding them from the determination process. This segmentation allows the system to utilize vibration data from straight sections for accurate rail installation state determination while avoiding contamination from curved section vibrations.
Solution Approach 2:
The preprocessor extracts and removes vibration data obtained in curved sections from the overall vibration data set. By taking out the irrelevant curved section data, the system prevents degradation of determination accuracy while maintaining the quantity of usable data from straight sections for analysis.
2Measurement precision
If vibration data from curved sections is excluded, then determination accuracy improves, but the quantity of available data decreases
Solution Approach 1:
The system segments the vibration data based on the geometric characteristics of the rail path, separating data from straight sections (useful) and curved sections (useless for this purpose). This segmentation resolves the contradiction by maintaining data quantity from straight sections while excluding curved section data, achieving both goals simultaneously.
Solution Approach 2:
Different quality requirements are applied to different sections of the rail path. Straight sections require high-quality vibration data for determination, while curved sections are excluded. This local quality approach allows the system to optimize determination accuracy in straight sections without being constrained by the limitations of curved section data.
Data Source
AI summary
A rail installation state determination system includes a vibration database storing vibration data indicating a relationship between a position, a vibration, and a travel speed of a vehicle traveling along a rail, a preprocessor that performs preprocessing on the vibration data stored in the vibration database, and a determiner that determines the installation state of the rail based on the vibration data on which the preprocessing has been performed. A path includes a straight section and a curved section. The preprocessor performs a curved section exclusion process of excluding pieces of the vibration data obtained in the curved section from the vibration data stored in the vibration database.