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Principle
Differential Reflectometry Mapping (DRM) is Heuristech proprietary technology, patented and developed during three years of research at Texas A&M University. DRM technology was specifically developed for electrical utilities to tackle corrosion issues on their networks.
It has been designed and improved to be efficient:
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in urban environments,
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in concrete,
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under waterways,
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and sensitive enough to detect delamination defects.
Electromagnetic waves are sent into the pipe and the location of the defect is worked out with the time delay of the signal reflexion (same principle as a radar). Reflectometry is the fruit of a paradigm shift from historical ground-based methods.
* Covered by PCT/US2018/026526, “Reflectometry Devices and Methods for Detecting Pipe Defects”.
Frequency
At Heuristech we believe that the future of pipe coating defect detection is high frequency with reflectometry.
Fig. A: Standard Coating Defect Impedance Model
Fig. B: Pipe Holiday EIS
Fig. C. Pipe Delamination EIS
Impedance
The impedance of a delamination is much smaller when measured with reflectometry and therefore, much easier to detect.
