|
You, as a user of eddy current crack
detection, already know the procedure: The crack test instrument
is calibrated with a natural or an artificial defect (crack or
pore) in order to determine the selectivity of testing.
The Concept of
eddyvisor®C is
dramatically different:
Calibration is with good parts only,
a principle many of you already know from ibg's Preventive
Multi-Frequency Testing (PMFT) in the structure test field.
In calibration , the crack probe is moved
over the area to be tested on the reference part, which is
actually a good part with no flaws. Signals generated by the
acceptable surface finish are recorded and displayed as
tolerance fields, signals from a large number of band pass
filter settings are taken simultaneously, and a tolerance zone
is established for each filter setting.
So we have created the "Preventive
Multi-Filter Testing." It is pure chance that the abbreviation
is also PMFT, but it complies with the test philosophy of ibg.
Both structure test and crack detection
require good parts only for calibration and thus also unexpected
defects and faults are detected as well.
|
