What are "probe coil designs" in the context of Eddy Current Testing?

Probe coil designs refer to the specific arrangement and configuration of coils within the probe used in Eddy Current Testing (ECT). This design is crucial because it significantly affects the sensitivity of the probe and its ability to detect various types of flaws or defects in the material being examined. The arrangement can include factors like the number of turns in the coil, the spacing between coils, coil diameter, and the orientation of the coils, all of which influence how effectively the probe can interact with the eddy currents induced in the conductive material.

Properly designed probe coils can enhance the resolution of the measurements and improve the probe's performance in specific applications, such as detecting surface cracks or measuring material thickness. Therefore, understanding and optimizing probe coil designs is key to achieving accurate and reliable results in Eddy Current Testing.