Acoustic Pipe Material Identification via Vibration Analysis
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Solution Overview
Problem
Current methods for identifying lead and galvanized steel service pipes in water distribution systems are invasive, require access to homes, and are not effective in distinguishing between different materials, hindering proactive replacement programs.
Innovation Solution
A non-invasive method using acoustic wave analysis to identify pipe materials by generating controlled vibrations and analyzing the vibration responses to determine the material composition of buried water pipes, specifically using a vibration exciter and transducer system to differentiate between lead, copper, and galvanized steel pipes without entering the property.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If visual inspection and water sampling methods are used to identify lead pipes, then material identification can be achieved, but access to homes is required which is intrusive and difficult to arrange
Solution Approach 1:
The patent replaces intrusive mechanical inspection methods (visual inspection, water sampling requiring home entry) with acoustic wave analysis that can detect pipe material through external measurements. Acoustic sensors mounted on the exterior of pipes or in the surrounding environment detect vibration characteristics that identify lead vs. copper pipes without requiring access to the interior or homeowner cooperation.
Solution Approach 2:
The patent introduces acoustic waves as an intermediary medium to indirectly detect pipe material composition. Instead of directly examining the pipe interior or water sample, acoustic waves interact with the pipe wall and transmit information about material properties that can be analyzed externally, serving as a mediator between the detection system and the target object.
2Measurement precision
If electrical resistivity testing devices are inserted inside the service pipe, then material testing can be performed, but the method is highly intrusive and dominated by the response of the pipe closest to the sensor
Solution Approach 1:
The patent substitutes electrical resistivity testing (which requires inserting devices into the pipe) with acoustic wave-based detection methods. Acoustic sensors can be positioned externally on the pipe surface or in the surrounding medium, eliminating the need to insert testing devices into the service pipe and avoiding the intrusiveness associated with internal sensor placement.
3Measurement precision
If traditional inspection methods are used, then some material identification can be achieved, but the ability to proactively build scaled replacement programs is restricted due to dependency on homeowner cooperation
Solution Approach 1:
The patent enables the utility company to perform material identification independently without requiring homeowner participation. Acoustic detection systems can be deployed by utility personnel to scan service pipes and automatically generate material identification reports, allowing the utility to proactively identify lead pipes and plan replacement programs without waiting for homeowner cooperation or scheduling appointments.
Solution Approach 2:
The patent replaces cooperative-based inspection workflows with autonomous acoustic detection technology. The system can rapidly survey multiple service pipes sequentially, generating comprehensive material identification data that enables scaled replacement program planning without the logistical constraints of coordinating with individual homeowners.
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
Enables accurate and non-intrusive identification of pipe materials, allowing utilities to plan scaled replacement programs without homeowner cooperation, improving safety and efficiency in water distribution systems.
Implementation Method 1
generating controlled vibrations in the water pipe using a vibration exciter
Implementation Method 2
detecting a vibration response associated with the water pipe in response to the controlled vibrations using a vibration transducer
Data Source
AI summary
A method for identifying a material of a water pipe buried below ground is provided. The method includes generating controlled vibrations in the water pipe using a vibration exciter, and detecting a vibration response associated with the water pipe in response to the controlled vibrations using a vibration transducer in vibrational communication with the water pipe. The method further includes analyzing and processing the vibration response using a vibration signal analyzer to identify the material of the water pipe based on a comparison of the processed vibration response of the water pipe to a known vibration response of a known water pipe material.