Pipe Leak Position Determination via Sensor Placement Optimization
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Solution Overview
Problem
Existing leak detection methods in pipes face precision issues when the leak is close to one of the sensors, due to waveform collapse from superimposition of propagation modes and frequency dispersion, leading to reduced accuracy in determining the leak position.
Innovation Solution
A position determination device and method that extract feature amounts from pipe vibrations and determine optimal measurement positions for sensors to enhance waveform similarity, allowing precise leak position specification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensors are mounted at two points spaced away from each other by a certain distance to detect leakage sounds, then the leak position can be specified by comparing sonic waveforms, but when leakage is present at a position close to one of the sensors, the similarity of waveforms detected by the sensors is lost due to waveform collapse from superimposition of propagation modes and frequency dispersion, reducing measurement precision
Solution Approach 1:
The patent applies preliminary action by determining optimal sensor measurement positions before actual leak detection occurs. The system pre-calculates and establishes sensor placement positions where waveform similarity is maximized, so when a leak occurs, the sensors are already in the optimal positions to detect similar waveforms, thereby ensuring high measurement precision regardless of leak location
Solution Approach 2:
The patent applies parameter changes by optimizing the spatial parameter (distance and position) between sensors. The system determines specific measurement positions based on waveform similarity criteria, changing the positional parameters of sensors from arbitrary placement to optimized placement, which ensures that waveforms detected by different sensors maintain high similarity for accurate leak position specification
2Measurement precision
If sensors are placed closer together to maintain waveform similarity, then measurement precision for leak position can be maintained, but the ability to detect leaks at different positions along the pipe is reduced
Solution Approach 1:
The system performs preliminary determination of multiple optimal measurement positions along the pipe, establishing a set of candidate positions where sensors should be placed. This pre-planning ensures that regardless of where a leak occurs along the pipe, there are pre-determined sensor positions that will provide both waveform similarity and adequate spatial separation for detecting leaks at various locations
Solution Approach 2:
The patent extends the solution from a single sensor pair to multiple sensor positions along the pipe length. By determining optimal positions at multiple locations, the system adds the dimension of spatial distribution, allowing it to maintain waveform similarity for each sensor pair while also providing comprehensive coverage along the entire pipe length
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
The solution enables high-precision leak position determination by optimizing sensor placement based on feature amounts, improving the accuracy of leak detection systems.
Implementation Method 1
pipe vibrations detected by detection means
Implementation Method 2
extracting feature amounts relating to detected pipe vibrations respectively based on the pipe vibrations
Data Source
AI summary
Provided are a position determination device and the like which determine vibration measurement positions for specifying a leak position.A position determination device 100 includes a feature amount extraction unit which extracts feature amounts relating to detected pipe vibrations respectively on the basis of the pipe vibrations detected by a plurality of detection units, and a measurement position determination unit which determines measurement positions of at least two of the detection units on the basis of the feature amounts.