Compliant Leak Detection System for Variable Pipe Diameters
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current leak detection methods in water distribution networks are limited by high costs, inaccuracy, noise interference, and material dependency, particularly in plastic pipes with variable diameters due to scaling, which complicates signal detection and localization.
Innovation Solution
A compliant leak detection system with adjustable arms and spherical bearings that maintain contact with the pipe wall, utilizing a flexible membrane and suction cups to detect leaks across varying diameters, and a gimbal mechanism to transmit axial forces for accurate measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a large number of pressure transducers are used to detect leaks, then detection coverage is improved, but system cost and complexity increase
Solution Approach 1:
The detection system is segmented into multiple functional components: a single force transducer, a compliant drum, multiple leak detection leaves with flexible membranes, and spherical bearings. This segmentation allows one transducer to effectively monitor multiple locations through the mechanical amplification of pressure gradients, replacing the need for numerous sensors while maintaining comprehensive leak detection coverage.
Solution Approach 2:
The compliant drum acts as an intermediary mechanism that converts localized pressure gradients into measurable forces. The drum's compliant structure amplifies the effect of pressure differences caused by leaks, allowing a single force transducer to detect leaks at multiple positions along the pipe, thereby reducing the total number of sensors required.
2Stability of the object's composition
If rigid detection structures are used, then structural stability is improved, but adaptability to varying pipe diameters deteriorates
Solution Approach 1:
The detection system employs dynamic elements including arms that can pivot, spherical bearings that can rotate and conform to the pipe surface, and flexible membranes that can deform. These dynamic components allow the structure to adapt to varying pipe diameters caused by scaling while maintaining stable contact with the pipe wall, effectively resolving the contradiction between structural stability and adaptability.
Solution Approach 2:
The leak detection leaves incorporate flexible membranes that can conform to the pipe's inner surface regardless of diameter variations. These flexible films maintain contact with the pipe wall even when the pipe diameter changes due to scaling, ensuring consistent detection performance without requiring rigid structural adjustments.
3Adaptability or versatility
If the detection system is made compliant to adapt to scaled pipes, then adaptability is improved, but measurement precision may deteriorate
Solution Approach 1:
The system replaces direct pressure measurement with force measurement using a force transducer on the compliant drum. This substitution allows the compliant structure to adapt to pipe diameter variations while the force transducer provides precise measurement of the amplified pressure gradient effects, thereby maintaining measurement precision despite the compliant design.
Solution Approach 2:
The compliant drum changes its physical parameters (shape, position) in response to pressure gradients caused by leaks. This parameter change allows the drum to adapt to varying pipe conditions while the force transducer measures the resulting force changes with high precision, effectively converting adaptability requirements into measurable force signals.
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 system reduces the number of sensors required, enhances reliability, and maintains effective leak detection in both clean and scaled pipes by ensuring consistent contact with the pipe wall, improving detection accuracy and reducing operational costs.
Implementation Method 1
suction from a leak will cause the flexible membrane to contact the pipe wall and put a drag force on the structure
Implementation Method 2
suction from a leak will cause the flexible membrane to contact the pipe wall and put a drag force on the structure
Implementation Method 3
each leak detection leaf supported by an arm pivotally attached to the structure and urged outwardly by a torsion spring into contact with a pipe wall
Implementation Method 4
A spherical bearing is placed at an end of each of the leak detection leaves for engaging an inner surface of the pipe wall
Data Source
AI summary
Compliant leak detection system. The system includes structure adapted to support at least two rows of leak detection leaves, each leak detection leaf supported by an arm pivotally attached to the structure and urged outwardly by a torsion spring into contact with a pipe wall so as to adjust for changes in pipe diameter. The leak detection leaf includes a rigid support and a flexible member such that suction from a leak will cause the flexible member to contact the pipe wall and put a drag force on the structure. An axial force transmitting drum measures the drag force to indicate presence of a leak.