Application Based On Auto Highlighting Scan Data Anomalies
Contact Acuren
Anomaly Detection Based Applications
- Corrosion Under Pipe Support (Robust Detection/Screening)
- Tank Floor Inspection from outside Chime (Robust Detection/Screening)
- Sleeve Weld Inspection (Complex Geometries)
- Vessel Inspection at Elevated Temperatures
Anomaly Detection Approach to Representing UT Data
- Only Highlighting indications which are ”unusual” compared with the rest of the scan (Shannon Information Processing)
- Ideal for highlighting subtle damage signatures, especially when close to specimen boundaries e.g. shallow cracks
- Subject of recent publication by ADG
Shannon Information Processing: Corrosion Under Pipe Support (CUPS)
- Multiple skip phased array inspection can be used to detect corrosion under pipe supports (without lifting pipe)
- Smoothly texture, deep flaws do not reflect ultrasound well, easily missed
- Shannon information (statistical processing) finds weak reflections by comparing to area off of support
- Robust tool for screening/detection of Corrosion Under Pipe Supports
Shannon Information Processing: Tank Floor Inspection
- Multiple skip phased array inspection can be used to detect corrosion in annular ring plate of storage tanks
- Smoothly texture, deep flaws do not reflect ultrasound well, easily missed
- Shannon information (statistical processing) finds weak reflections with greater confidence
Deployment: Tank Floor Inspection (Shannon Information Processing)
- Tank Floor Inspected with Multiple-Skip PAUT technique
- Regions with anomaly highlighted as regions with potential corrosion
- Circumferential location and distance from the shell was reported for each anomaly
Deployment: Sleeve Weld Inspection (Shannon Information Processing)
- Major reflections from weld obscure small LOF flaws
- Potential for mis-identifying geometry as flaws or flaws as geometry
- LOF defects much easier to identify after applying Shannon Information Processing
- Analysis significantly faster, less prone to false calls
Shannon Information Processing: Vessel Inspection at High Temperature
- Developed prototype system for on stream inspection of heavy walled vessel (temperature above 200°C)
- Designed custom wedge to withstand high temperature (up to 350°C)
- Tested on 4” block with small FBH holes drilled to various depths heated to 280°C
- TFM imaging very noisy, shallowest target merged into backwall, PCI image improved but still noisy
- TFM with Shannon Info processing on signals plus thresholding gives best detection of simulated flaws
