Sweep frequency eddy current testing

Sweep frequency eddy current testing (SFECT) is a type of eddy current testing technique, where the probes are operated around its resonance frequency. Sweep frequency eddy current techniques involve collecting eddy current data at a wide range of frequencies. This usually involves the use of a specialized piece of equipment such as an impedance analyzer or a high precision LCR meter, which can be configured to automatically make measurements over a range of frequencies.

The advantage of a swept frequency measurement is that depth information can be obtained since eddy current depth of penetration varies as a function of frequency.

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