pyörrevirtitutkimus
Pyörrevirtitutkimus, known in English as eddy current testing, is a non-destructive testing method used to detect surface and near-surface flaws in electrically conductive materials. This technique relies on the principle of electromagnetic induction. A primary coil, energized by an alternating current, generates a time-varying magnetic field. When this field is brought near a conductive material, it induces circulating electrical currents within the material, known as eddy currents.
These induced eddy currents create their own magnetic field, which opposes the original magnetic field. The
Pyörrevirtitutkimus is particularly effective for detecting surface cracks, which are often the most critical defects. It