In-Pipe Leak Detection Using Pressure Gradient Sensing Tubes
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current leak detection methods in water distribution systems are inefficient, with significant water losses due to leaks in pipes, leading to wasted energy and resources, as they often rely on external sensing methods that are limited in accuracy and coverage.
Innovation Solution
An in-pipe leak detection system featuring a structure with multiple tubes and sensors that can move along the pipe to detect pressure gradients, allowing for precise localization of leaks at pipe walls, joints, and valves, using various sensor technologies such as contact sensors, flux sensors, and pressure sensors to create a two-dimensional leak pattern.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If external acoustic sensing methods are used for leak detection, then the system can detect leaks from outside the pipe, but the accuracy and coverage are limited
Solution Approach 1:
The patent embeds sensing tubes directly inside the pipe, nesting the detection system within the pipe structure itself. This allows the sensor to be positioned at the leak source rather than externally, significantly improving detection accuracy and coverage while simplifying the overall sensing architecture by eliminating the need for complex external acoustic coupling systems.
Solution Approach 2:
The sensing tube acts as an intermediary element between the leak source and the detection electronics. By placing the tube inside the pipe with its end near the pipe wall, it serves as a direct conduit for detecting pressure gradients and acoustic signals from leaks, improving measurement precision without requiring complex external sensing arrangements.
2Loss of information
If simple water metering is used to detect unaccounted water, then the system is easy to implement, but it cannot localize leaks or provide detailed leak characteristics
Solution Approach 1:
The pipe interior is segmented into multiple sensing zones by placing multiple sensing tubes at different locations along the pipe. Each tube independently detects pressure gradients in its local region, allowing the system to segment the detection task and provide localized leak information without requiring a single complex detection system.
Solution Approach 2:
The patent transitions from one-dimensional water metering (total volume measurement) to two-dimensional spatial mapping by placing sensing tubes at multiple positions along the pipe. This dimensional expansion allows the system to not only detect total water loss but also localize leaks to specific positions and provide spatial distribution of leak characteristics.
3Measurement precision
If in-pipe sensing structures are deployed to improve leak detection, then leak localization accuracy improves, but the system complexity and deployment difficulty increase
Solution Approach 1:
The sensing tube is designed with localized functionality - a simple tubular structure with an end near the pipe wall that detects pressure gradients in its immediate vicinity. This local quality design simplifies the overall system compared to complex distributed sensing arrays, as each tube is a simple, self-contained unit that can be independently deployed and operated.
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 system effectively reduces false positives and provides high-resolution leak detection, enabling efficient identification and localization of leaks, thereby minimizing water losses and optimizing water distribution efficiency.
Implementation Method 1
A sensor is disposed within the at least one tube to detect a pressure gradient within the tube. The pressure gradient indicates a leak in the pipe adjacent to the tube location.
Implementation Method 2
The pressure gradient may be measured by fluid flow in the tube.
Data Source
AI summary
The system includes structure for supporting at least one tube within a pipe. The tube has one end disposed close to, or in contact with, a wall of the pipe. A sensor is disposed within the at least one tube to detect a pressure gradient or fluid movement within the tube. Such pressure gradient or fluid movement indicates a leak in the pipe adjacent to the tube location. In a preferred embodiment, the structure is a ring sized to fit within the pipe and the ring supports a plurality of tubes. In another aspect, the tube includes a restriction to prevent flow and pressure is measured on each side of the restriction.