Leakage Determination Using Correlation Profiles
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Solution Overview
Problem
Existing leakage detection methods in buried pipes fail to accurately determine leaks due to reliance on vibration measurement data alone, neglecting ambient environmental factors such as noise variations caused by time, weather, and other conditions.
Innovation Solution
A method that compares correlation profiles, including cross-correlation functions and environmental information, from measurement data at multiple positions to determine leaks, using a database to analyze and account for ambient conditions, and incorporates simulated leakage sounds to improve accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If vibration measurement data alone is used to determine leakage, then the detection system is simple, but the accuracy of leakage determination deteriorates due to ambient noise interference
Solution Approach 1:
The patent introduces an intermediary approach by using correlation profiles as a mediator between the vibration measurement data and the leakage determination. The correlation profile, which includes cross-correlation functions and environmental information, acts as an intermediary that filters out ambient noise interference and enables accurate leakage detection without requiring complex additional hardware.
2Measurement precision
If correlation profile comparison method is used, then leakage determination accuracy is improved by considering ambient factors, but the system complexity increases due to database and processing requirements
Solution Approach 1:
The patent applies preliminary action by pre-storing correlation profiles in a database that include cross-correlation functions and environmental information before actual leakage detection. This preliminary preparation allows the system to efficiently compare and determine leakage without requiring complex real-time processing, thus reducing operational system complexity while maintaining high accuracy.
3Ease of operation
If simple vibration measurement is used, then the measurement system is easy to operate, but the reliability of leakage detection deteriorates due to inability to distinguish leakage noise from ambient noise
Solution Approach 1:
The patent implements feedback by incorporating environmental information into the correlation profile, which then feeds back into the leakage determination process. This feedback mechanism allows the system to continuously adjust and refine its detection by comparing current measurement data with stored profiles that include environmental context, thereby improving reliability while maintaining ease of operation through automated processing.
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
This approach enables accurate leak detection and position estimation by considering ambient factors, reducing errors and improving the precision of leak identification and volume estimation.
Implementation Method 1
a correlation profile including a cross-correlation function obtained from measurement data measured at at least a pair of measurement positions
Data Source
AI summary
The present invention is a leakage determination method comprising: comparing a correlation profile including a cross-correlation function obtained from measurement data measured at at least a pair of measurement positions and position information for the measurement positions, and a correlation profile at the time of the leakage determination including the cross-correlation function obtained from the measurement data measured at the pair of measurement positions and the position information for the measurement positions; and determining leakage.