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Matrix array probes for 3D TFM
Matrix array probes for three-dimensional imaging and TFM / PWI techniques.
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Phased array probe models (9)
Type a part number or pick the parameters. Click a model to open its series and send an inquiry.
| Part number | Application | MHz | Elements | Pitch [mm] | Aperture [mm] | Housing |
|---|---|---|---|---|---|---|
| 1M8*8-1.5*1.5-B19 | 1.5D matrix | 1 | 64 (8×8) | 1.5×1.5 | 12×12 | B19 |
| 1.5M5*3-3.5*3-B21 | 1.5D matrix | 1.5 | 15 (5×3) | 3.5×3 | 17.5×9 | B21 |
| 2M8*3-3.5*4.6-A18 | TRL matrix with wedge | 2 | 24 (8×3) | 3.5×4.6 | 28×13.8 | A18 |
| 5M8*8-1.0*1.0-B15 | 2D matrix | 5 | 64 (8×8) | 1×1 | 8×8 | B15 |
| 5M8*8-1.5*1.5-B19 | 2D matrix | 5 | 64 (8×8) | 1.5×1.5 | 12×12 | B19 |
| 5M16*16-1.0*1.0-B16 | 2D matrix | 5 | 256 (16×16) | 1×1 | 16×16 | B16 |
| 10M4*4-2.0*2.0-B15 | 2D matrix | 10 | 16 (4×4) | 2×2 | 8×8 | B15 |
| 10M8*8-0.6*0.6-B13 | 2D matrix | 10 | 64 (8×8) | 0.6×0.6 | 4.8×4.8 | B13 |
| 15M20*3-0.8*1.2-B68 | 2D matrix | 15 | 60 (20×3) | 0.8×1.2 | 16×3.6 | B68 |
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Send the part numberParameters as specified by the manufacturer. Cable length and connector are agreed in the quotation.
What a matrix layout adds
A linear array steers the beam in one plane only — the one its elements are lined up along. A matrix array has elements in two dimensions, so the beam can also be skewed sideways, out of the plane of incidence. That solves the problem that ruins most inspections of dissimilar and austenitic welds: the beam travels through a structure of varying velocity, bends, and a linear array shows the indication somewhere other than where it is.
We stock the matrix series in an 8 × 8 layout — 64 elements at a 1.0 × 1.0 mm pitch, an 8 × 8 mm active aperture, in a 21 × 13 × 28 mm housing. A smaller focal spot concentrates more energy and gives a better signal-to-noise ratio than a beam spread out in the passive plane.
Matrix arrays, FMC and 3D imaging
FMC records every transmit–receive combination: with 64 elements that is 4096 waveforms at each probe position. The TFM algorithm reconstructs an image focused at every point of the grid from that set, and with a matrix array it does so in three dimensions — hence 3D TFM. What you see is not a single cross-section but the volume of the discontinuity, including how it sits relative to the weld.
This needs an instrument that computes such images on the fly: Novascan V3 here, or the ROBUST F1 board in versions up to 256/256. The price is throughput — with the same mechanics, FMC scanning is slower than ordinary phased array and the data sets are an order of magnitude larger.
Frequently asked questions
When does a matrix array beat a linear one?
On dissimilar welds, austenitic and coarse-grained material, on geometries where the flaw does not lie parallel to the weld, and wherever the orientation of the discontinuity in space has to be assessed. For a plain carbon steel butt weld, a linear probe from Phased array probes (PAUT) is faster and cheaper.
Will any flaw detector drive a matrix array?
No. You need an instrument with 3D TFM support and enough channels — Novascan V3, or a system built on ROBUST F1. Connected to an instrument without those functions, the probe behaves like an ordinary array with a small aperture.
What are the limits?
For the same element count, a matrix array has a smaller aperture along each axis than a linear one, so it focuses shallower. Add computation time and data volume. It is a tool for the jobs where ordinary PA fails, not a general replacement.