Annular Phased Array Transducer0 pages

GE
Inspection Technologies

Ultrasonics

Annular Phased Array Probes
for Multi-zone Immersion Inspection

What is a Phased Array Probe?
A phased array probe can be compared to a large single
element transducer whose active area has been subdivided into small segments or elements. When connected
to appropriate instrumentation, the beam from an annular

phased array is focused electronically by sequentially
firing the elements of the array. Focal depth is generated
electronically by the instrumentation and can be changed
on each pulse repetition.

Key Features
• Variable beam size or aperture, controlled electronically
• Variable spherical (point) focus, controlled electronically
• Replaceable center element to optimize near surface resolution
• Three connections to center element (see gures page 2) - UHF on probe
head, Lemo 00 on Hypertronics connector, and Hypertronics pin G-19
• 4.5 m shielded cable standard

Advantages of Annular Phased Arrays
• Eliminate multiple inspections with xed focus probes.

• High sensitivity, broadband piezocomposite elements

• Change focal depth electronically with each pulse of the
instrument.

• Annular rings have equal area for best element uniformity.

• Increase sensitivity and signal to noise ratio with electronic focusing.
• Eliminate costly set up time required with multiple xed
focus probes.

Digital | Eddy Current | Film | Testing Machines | Ultrasonics | X-ray

• High resolution design, 7.5 MHz and 10 MHz frequencies