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 Linear
phased array probes
Electronic beam steering
Principle
probes for rotor inspection – TOFD technique
10MHz 26 elts
extra flat probe
Angled contact phased array for vessel inspection
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Combination of electronic beam steering and focusing.
- High density of elements allows high beam steering angles
- Focusing depth can be electronically selected
More detail
about phased array principle here >>
Typical use in direct contact, with water film,
or with a wedge
Typical work with pulse echo or TOFD technique
Applications
Applications requiring variable angles and sound
path, applications with difficult access for the probes (reduced
space, complex geometry) :
- Pressurised components inspection
- Rotor discs inspection
- Blade roots and rotor steeples inspection
- Weld inspection
Advantages
- Feasibility of some inspections and access to
difficult areas
- Reduction of the number of probes
- Inspection angle and focusing depth sweeping capability
- Mechanical set-up simplification
Typical configurations
See also the main features
of all phased array probes here >>
| Freq. (MHz) |
Pitch p (mm) |
Lateral resolution D |
| 8 elements |
16 elements |
32 elements |
64 elements |
| 2 |
1.5 |
2.3 mm @ 15 mm |
3.7 mm @ 50 mm |
7.4 mm @ 200 mm |
11 mm @ 600 mm |
| 5 |
0.6 |
0.8 mm @ 5 mm |
1.9 mm @ 25 mm |
3.7 mm @ 100 mm |
5.5 mm @ 300 mm |
| 10 |
0.3 |
0.4 mm @ 2.5 mm |
0.7 mm @ 10 mm |
1.8 mm @ 50 mm |
1.8 mm @ 100 mm |
| 15 |
0.25 |
0.3 mm @ 2 mm |
0.6 mm @ 10 mm |
1.2 mm @ 40 mm |
1.2 mm @ 80 mm |
Figures above are optimised for deflexion angles
from 0° to 80°.
Resolutions are calculated at the indicated sound path, for 45°
SW in steel, with 36° Perspex wedge (-6dB in T/R mode)
High frequency linear array with removable wedge
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Active elements pattern
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