Aris ia dit iam ine inverfectus; nos supi- mactus poenaturo, noctudem num ... M 2 M phased-array solutions for Nondestru
Advantages of phased-array Ad Catumprobes inatiaeque i Phased arrays have several advantages over conventional ultrasonic probes that derive from the ability to dynamically control the acoustic beam transmitted into the structure under examination. Phased arrays can reduce inspection times by eliminating or reducing the need for mechanical scanning by taking advantage of the ability to perform electronic scanning. Electronic scanning is accomplished by fi ring successive groups of elements in the array. Eliminating or reducing mechanical scanning also increases the reliability of the measurements by eliminating changes in (or loss of) coupling, which is a risk each time the probe is moved.
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Whereas a conventional probe has one focal length and one orientation, a single phasedarray probe allows the user to change the shape and focal point of the ultrasonic beam to optimize each inspection. The acoustic energy can be focused, and delay laws can be applied to steer the acoustic beam.
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M 2 M phased-array solutions for Nondestructive M 2 MTesting phased-array solutions for Non
1 rue de Terre-Neuve . Miniparc du Verger . Bat. H . 91940 Les Ulis 1 rue . FRANCE de Terre-Neuve . Miniparc du Verger . Bat. H .
+33 1 60 92 39 65 |
[email protected] | www.m2m-ndt.com +33 1 60 92 39 65 |
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Advantages of phased-array probes Sectorial scanning combined with focusing. Using CIVA (or the M2M software), the ultrasonic beam can be simulated. The figure shows the radiated fi eld calculated for a 32-element linear array for a specified range in a sectorial scan (longitudinal mode, -30 degrees to +30 degrees). The simulation makes it possible to verify the size and location of the focal spot for every angle. The 3D visualization is displayed above in the specimen geometry, which greatly facilitates analysis of results.
3D vizualisation Compared to measurements with conventional single-element probes, the detection and sizing of defects is much easier and more robust. Instead of struggling to fi nd the optimal single signal that can be obtained with one element, a phased array allows hundreds of signals to be captured at once. The greatly improved effi ciency makes it much easier to characterize defects and
reduces the number of false alarms. When used in conjunction with simulation, inspection strategies can be optimized to improve detection. Data recording and traceability are also greatly improved. For example, inspection data can be saved and compared to simulated results, helping to confirm whether or not there is a defect in the inspected structure.
Real-time sectorial-scan imaging using an M2M system and an IMASONIC linear array (64 elements@5MHz). A series of sidedrilled holes are evident in the image.
M 2 M phased-array solutions for Nondestructive Testing 1 rue de Terre-Neuve . Miniparc du Verger . Bat. H . 91940 Les Ulis . FRANCE +33 1 60 92 39 65 |
[email protected] | www.m2m-ndt.com
