Eddy current testing probe composed of planar coils

A new differential eddy current testing sensor used for detecting crack extension direction

“…Various planar coils, such as round coil, rectangle coil, meander coil and mesh coil, have been studied in past studies [10][11][12][13][14] and these coils can be called even winding coil. We have proposed the gradient winding and studied on the straight gradient winding coils in our past researches.…”

Differential eddy current testing sensor composed of double gradient winding coils for crack detection

“…There are many feature extraction and classification methods like neural network, wavelet, principal component analysis and Bayesian approach [5]- [13]. Some different planar coils have been studied in past studies [14] [15], such as round coil, rectangle coil [15]- [17], meander coil [15] [18] [19] and mesh coil [18] [19], but the coils can only inspect a limited area under it. In order to detect crack position, the sensor performs point scan by two-dimensional scan system with a lot of measurement, so it is called point scan imaging sensor [20].…”

Quality improvement of leather tanning process using a novel sensor

“…Planar meander as well as mesh type sensors are used in inspection of printed circuit boards [2,3,4], inspection of saxophone reeds [5], dairy products [6], estimation of near-surface material properties [7,8]. Interdigital sensors are used to read the moisture diffusion process in power transformers [9], for qualitative and quantitative gas analysis [10], for measurement of moisture diffusion in power cables [11], for investigating the fluid flow [12] and for materials evaluation [13].…”