TesTex HAWKEYE 2000 Weld Scanning System for Crack Inspection
Using the Balanced Field Electromagnetic Technique (BFET), TesTex's Hawkeye crack detection system detects surface & subsurface cracking through paints, coatings or scale. With scanning speeds from a few inches per second up to a foot per second, the Hawkeye is much faster and more thorough than traditional NDT techniques.
See video here.
A revolutionary technique has been developed for the detection of cracks in welds and other materials.
TesTex introduces one of the most innovative systems for the detection and sizing of both surface and sub-surface toe-cracks in welds and base metals. Although the current system and geometric configuration is most suited for the inspection of lap welds in storage tank plates, the system is easily adjustable for the detection of toe-cracks in other welds such as butt, toe, fillet, etc. This system is based on the eddy current principles of electromagnetic techniques and replaces the old and laborious techniques such as vacuum box, dye penetrant or magnetic particle inspections. This technique is quantitative and gives the depth and length of cracks. Unlike UT, the system does not demand a clean surface and is forgiving to scale, corrosion products, etc. With scanning speeds up to 1 ft. / second, the system is fast, accurate and efficient for the evaluation of toe-cracks in welds.
Paint / coatings and corrosive products have no impact on flaw signal
Requires only minimum surface preparation
Unlike UT, requires no couplant - dry method
Testing speeds from a few inches / second to 1 ft. / second
Elimination of lift-off noise signals using special algorithms
Hawkeye can detect cracks with 1/8" or 3/8" of the surface
Scanners with various profiles to fit the weld outlines of lap, butt, toe, fillet, etc.
Enhanced S/N ratio using special noise reduction techniques.
Real time display of defects.
Signals are digitized and stored for future trending purposes
DSP based electronics platform
The Hawkeye 2000 DSP (Digital Signal Processing) with multi-channel electronics
Picture above shows some different Hawkeye Probe designs
A lap-weld being scanned using the Hawkeye 2000
Example of Typical Defects:
Flaw signal from a sub-surface 6mm EDM notch incorporated into a lap-weld. Plate thickness is 0.375". Scanning speed is approximately 1 ft. / second
The waveform above was collected using a traditional Hawkeye Probe. Both cracks are 0.008" wide with the first cracking at 0.083" deep and the second cracking at 0.150" deep.
The waveform above was collected using the traditional Hawkeye Probe. This data was collected on a Column during the 2008 ConocoPhillips Turnaround. The sharp up and down signal is a crack indication.
The Hawkeye 2000's "Hawkeye" software package contains modules for Data Acquisition, 3D Full Color Data Display, Quick View Analysis and Advanced Digital Signal Processing. This provides crack detection and gives the depth and length of cracks.
User friendly menu driven functions
Special real time signal processing algorithms
Real time 3-D full color display
Rotating view for seeing hidden defects
Digital filtering for signal interpretation
Zooming algorithms for detailed views
Full screen view of the display software with defects including side view, top view, channel processed window, 3D view and raw data window.
Can be used for different lap weld sizes from 6mm, 9mm and 12mm thick plates (depth of energy penetrate).
A single envelope system for 1, 2 or 3 sensors
Adjustments for sensor orientation
Separates weld data from heat affected zone data.
System and Technical Specifications
Works with various TesTex systems or stands alone
Main Unit Size: 4" x 2" x 3" (10 x 5 x 7.6 cm), Weight: 1 lb. (<0.5 kg.)
Channels: Up to 8
Power: 12VDC, 110 / 220 VAC or 240V
Electronics Base Digital / DSP based
Power Consumption Max 15VA
Self-Adjusting: 50 / 60 Hz
Measuring Technique: Balance Field Electromagnetic Technique (BFET) Maximum Penetration: 0.375" (9mm) carbon steel Number of Sensors / Channels: 1 to 8 Inspection Width: 12mm per channel Scanning Speed: 12 inch / second or 305mm / second (Max.) Probe Types: