NDT Techniques »

Phased Array Examination

The Ultrasonic Phased Array probe consists of many small ultrasonic transducers, each of which can be pulsed independently. By varying the timing, for instance by pulsing the elements one by one in sequence along a row, a pattern of constructive interference is set up that results in a beam at a set angle. In other words, the beam can be steered electronically. The beam is swept like a search-light through the object being examined, and the data from multiple beams are put together to make a visual image showing a slice through the object.

Ultrasonic Phased Array is used in several industrial sectors, such as construction or power generation. This method is an advanced NDT method that is used to detect component failures i.e. cracks or flaws and thereby determine component quality.

Due to the possibility to control parameters such as beam angle and focal distance, this method is very efficient regarding the defect detection and speed of testing. Apart from detecting flaws in components, phased array can also be used for wall thickness measurements in conjunction with corrosion testing.

Phased Array can be used for the following industrial purposes:

  • Flaw detection (in welds)
  • Thickness measurements
  • Corrosion inspection

 

To further assist our customers with a wider range of inspection methods we have developed the following inspection tools:

 

ScalaMove®

A semi-automatic phased array scanner equipped with a large aperture and low frequency transducer which allows us to inspect high attenuation materials like duplex steels or fibre reinforced plastics or composites.

Typical applications are;

  • Delamination testing on turbine wind blades
  • FRP/GRP/GVK bond testing
  • Fatigue failure inspection on large forged duplex components

 

ScalaStud®

A compact and low-profile hand-manipulated scanner which allows us to inspect bolts and studs of various diameters and lengths. The low and narrow profile ensures a wide range of employability and in-situ inspection flexibility.

Typical inspection applications are;

  • Slewbearing ring studs
  • Flange bolts
  • Riser system bolts

 

ScalaShaft®

A unique internal scanning tool which allows for in-service inspection of Topdrive shafts with an internal diameter between 3” – 5” and a length up to 5 meters vertically. The scanner is setup in such a way that with a single circumferential scan 3 inspections can be conducted simultaneously; flaw detection facing upwards, facing downwards and straight beam corrosion mapping.

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