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

Phased Array Photo

The benefits of Phased Array are:

* High scan speed with no moving parts
* Software control of beam angle, focal distance and spot size
* Greater accuracy of detection and sizing
* Multiple angle inspection with a small multi element transducer

Phased Array PhotoPhased Array Photo

Phased Array PhotoPhased Array Photo

Phased Array Module Specifications

Overall dimensions
(W x H x D)

244 mm x 182 mm x 57 mm
(9.6 in. x 7.1 in. x 2.1 in.)

Weight

1.2 kg (2.6 lb)

Connectors

1 OmniScan connector for phased-array probes
2 BNC connectors (1 pulser/receiver,
1 receiver for conventional UT) (BNC not available on models 32:32 and 32:128)

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:
180 MB (or 300 MB optional)

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

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