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 Phased Array Ultrasonic Testing (PAUT) is an advanced NDT method that utilizes a multi element ultrasonic transducer to create multiple beam angles that combine to form a single wave front. The time delay of these multiple beam angles is adjusted to a specific range of angles. A standard UT detector is capable of creating a beam of only one angle, typically 0, 45, 60 or 70 degree. With phased array multiple beams are simultaneously created, typically 16-256. These multiple beam angles create a full volumetric sectorial scan (S-Scan), a real time side view image from one inspection point. Coast to Coast NDE utilizes the OmniScan MX for our phased array inspections
The benefits of Phased Array are:
Phased Array Module Specifications
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Overall dimensions |
244 mm x 182 mm x 57 mm |
Weight |
1.2 kg (2.6 lb) |
Connectors |
1 OmniScan connector for phased-array probes |
Number of focal laws |
256 |
Probe recognition |
Automatic probe recognition and setup |
Pulser/Receiver |
|
Aperture |
16 elements* |
Number of elements |
128 elements |
Pulser |
|
Voltage |
80 V per element |
Pulse width |
Adjustable from 30 ns to 500 ns, resolution of 2.5 ns |
Fall time |
Less than 10 ns |
Pulse shape |
Negative square wave |
Output impedance |
Less than 25 Ω |
Receiver |
|
Gain |
0 dB to 74 dB, maximum input signal 1.32 Vp-p |
Input impedance |
75 Ω |
System bandwidth |
0.75 MHz to 18 MHz (-3 dB) |
Beamforming |
|
Scan type |
Azimuthal and linear |
Scan quantity |
Up to 8 |
Active elements |
16* |
Elements |
128 |
Delay range transmission |
0 µs to 10 µs in 2.5-ns increments |
Delay range reception |
0 µs to 10 µs in 2.5-ns increments |
Data acquisition |
|
Digitizing frequency |
100 MHz (10 bits) |
Maximum pulsing rate |
Up to 10 kHz (C-scan) |
Acquisition depth |
29 meters in steel (L-wave), 10 ms with compression. 0.24 meter in steel (L-wave), 81.9 µs without compression |
Data processing |
|
Number of data points |
Up to 8000 |
Real-time averaging |
2, 4, 8, 16 |
Rectifier |
RF, full wave, halfwave +, halfwave - |
Filtering |
Low-pass (adjusted to probe frequency), digital filtering (bandwidth, frequency range) |
Video filtering |
Smoothing (adjusted to probe frequency range) |
Data storage |
|
A-scan recording (TOFD) |
6000 A-scans per second (512-point, 8-bit A-scan) |
C-scan type data recording |
I, A, B, up to 10 kHz (amplitude or TOF) |
Maximum file size |
Limited to available internal flash memory: |
Data visualization |
|
A-scan refresh rate |
Real-time: 60 Hz |
Volume-corrected S-scan |
Up to 40 Hz |
Data synchronization |
|
On internal clock |
1 Hz to 10 kHz |
On encoder |
On 1 or 2 axes |
Programmable time-corrected gain (TCG) |
|
Number of points |
16 (1 TCG curve per channel for focal laws) |
Alarms |
|
Number of alarms |
3 |
Conditions |
Any logical combination of gates |
Analog outputs |
2 |
