Potential Impact:

Robert Hughes

Images courtesy of Google

Images courtesy of Google

Images courtesy of Google

Dangerous

Embarrassing

Expensive

Expensive

1. Precautionary overhaul…

2. Over engineering…

3. Finding the damage before it causes failure but without damaging the structural integrity of the component…

…Priceless (much cheaper)

…Expensive

…Expensive

• Easy• Repeatable• Sensitive

High value manufacturing items◦ Complex geometries

Sub-mm defect detection◦ Difficult materials

Higher background noise

ww

w3

.im

peri

al.ac.u

k/m

estr

uctu

ralinte

gri

ty/re

searc

h

Decision Threshold(3x Max Noise)

Position along scan axis

Ele

ctr

ical sig

nal Component Rejected

Probe

Defect

Position along scan axis

Ele

ctr

ical sig

nal

Decision Threshold(3x Max Noise)

Component Accepted

Coaxial Cable

ECT coil

“Equation of Motion”

Resonant Frequency

Increasing frequency of Operation

Decision Threshold

Near Electrical Resonance signal enhancement (NERSE)

Sub-mm Defects

@ 2.5MHz

@ NERSE(3.75 MHz)

A B C D

A B C D

Detect smaller defects

◦ Greater confidence in structural integrity

◦ Longer lifespans

◦ Greater work efficiency

◦ Redesign to save weight