Description

G‑Scan

G‑Scan is a rapid rail inspection system that can be deployed on tracks during normal operation. It screens the entire rail cross‑section in a single test by using several guided wave modes simultaneously. As each mode carries energy in different parts of the rail, reflections reveal location of defects such as corrosion in any section, including
the foot.

The G‑Scan is ideally suited for guided wave screening of:

  • General rail
  • Level crossings
  • Rail welds of all kinds
  • Tunnels
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Principle of Operation

A structure can support many guided wave modes at any given frequency. Each mode carries the guided wave energy in different parts of the rail cross section. Using several modes simultaneously, the entire rail cross section can be inspected in a single test. In addition, by examining which mode is reflected from a defect, it is possible to determine in what part of the rail cross section the defect is located.

Example of guided wave mode shapes with energy concentrated in the foot (left) and web (right) of the rail respectively.

Unlike conventional ultrasonic inspection, guided waves provide 100% volumetric inspection and can inspect tens of metres in a single test.

Specifications

Number of Channels
26
Rail Sizes
CEN60, CEN56, CEN54, CEN50
Operating Temperature
-40°C to 120°C (-40°F to 248°F)
Transduction System Compatibility
Wavemaker® G4

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