Pipe Inspection Scraper Carriage with Ultrasound Tapping Detection
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Solution Overview
Problem
Existing methods for detecting clandestine tapping in pipelines are expensive, require technical expertise, and cannot differentiate between tapping and other anomalies, such as leaks or deformations.
Innovation Solution
A scraper carriage equipped with multiple ultrasound transducers arranged in alternating circles and offset patterns, combined with a processing unit and inertial unit, to detect and locate clandestine tapping by analyzing reflected ultrasound pulses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If magnetic flux leak sensors are used to detect clandestine tapping, then detection capability is improved, but technical expertise requirements and implementation complexity increase significantly
Solution Approach 1:
The patent replaces complex magnetic flux leak sensors with a simplified ultrasound-based detection system. The ultrasound transducers emit acoustic waves that travel through the pipe wall, and any changes in wave propagation (such as those caused by clandestine tapping) are detected by the receiver. This substitution maintains detection capability while significantly reducing the need for specialized technical expertise and simplifying implementation.
Solution Approach 2:
The patent introduces an intermediary processing unit that automatically analyzes the ultrasound signals and generates tap location reports. This intermediary system processes the raw data from the transducers, identifies anomalies, and provides actionable information, thereby reducing the operational complexity and eliminating the need for highly skilled operators to manually interpret complex magnetic sensor data.
2Ease of operation
If acoustic sensors are used to listen to noises, then passive detection is enabled, but the ability to detect clandestine tapping without fluid draw-off is lost
Solution Approach 1:
The patent employs dynamic ultrasound wave propagation analysis rather than static acoustic listening. The ultrasound transducers actively emit waves and the system dynamically analyzes changes in wave transmission through the pipe wall. This dynamic approach enables the system to detect tapping events regardless of whether fluid is being drawn off, as the detection is based on structural integrity changes rather than fluid flow variations.
Solution Approach 2:
The patent replaces passive acoustic sensing with active ultrasound transmission through the pipe wall. Instead of listening for noises generated by tapping, the system sends ultrasound waves through the pipe structure and detects changes in wave propagation caused by tapping. This substitution enables reliable detection without requiring fluid draw-off conditions.
3Measurement precision
If ultrasound transducers in transmitter/receiver mode are used, then crack and corrosion detection is enabled, but differentiated detection of clandestine tapping is not achieved
Solution Approach 1:
The patent applies local quality by positioning ultrasound transducers at specific locations around the pipe circumference and analyzing wave propagation paths through different sections of the pipe wall. By examining the local response of ultrasound waves to potential defects at various angular positions, the system can differentiate between general wall defects (cracks, corrosions) and the specific signature patterns of clandestine tapping, enabling both precise defect detection and targeted tapping identification.
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
Accurately identifies and locates clandestine tapping with high precision, reducing reliance on external surveillance and technical expertise, and providing energy-autonomous operation.
Implementation Method 1
a first crown, carrying a first plurality of ultrasound transducers, arranged on a first circle centered on the axis and of diameter substantially equal to a diameter of the pipe
Implementation Method 2
arranged so that a wave transmitted by a transmitting ultrasound transducer is reflected, by a wall of the pipe facing it, towards a counterpart receiving ultrasound transducer
Data Source
AI summary
A device for inspecting a pipe, includes a scraper carriage, substantially cylindrical about an axis coinciding with an axis of the pipe and which is inserted into the pipe and propelled by a liquid transported by the pipe, and a measurer carried by the carriage. The measurer includes a first crown, carrying a first set of ultrasound transducers, arranged on a first circle centered on the axis and of diameter substantially equal to an inside diameter of the pipe, alternating a transmitting ultrasound transducer and a receiving ultrasound transducer, arranged so that a wave transmitted by a transmitting ultrasound transducer is reflected, by a wall of the pipe facing it, towards a counterpart receiving ultrasound transducer.