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Study on Signal Processing in Eddy Current Testing for Defects in Spline Gear
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 Title & Authors
Study on Signal Processing in Eddy Current Testing for Defects in Spline Gear
Lee, Jae Ho; Park, Tae Sung; Park, Ik Keun;
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 Abstract
Eddy current testing (ECT) is commonly applied for the inspection of automated production lines of metallic products, because it has a high inspection speed and a reasonable price. When ECT is applied for the inspection of a metallic object having an uneven target surface, such as the spline gear of a spline shaft, it is difficult to distinguish between the original signal obtained from the sensor and the signal generated by a defect because of the relatively large surface signals having similar frequency distributions. To facilitate the detection of defect signals from the spline gear, implementation of high-order filters is essential, so that the fault signals can be distinguished from the surrounding noise signals, and simultaneously, the pass-band of the filter can be adjusted according to the status of each production line and the object to be inspected. We will examine the infinite impulse filters (IIR filters) available for implementing an advanced filter for ECT, and attempt to detect the flaw signals through optimization of system design parameters for detecting the signals at the system level.
 Keywords
Spline Gear;Eddy Current Testing;Phase Linearity;Digital Filter;ECT Sensor;
 Language
Korean
 Cited by
 References
1.
A. Nicolaide, "Electromagnetics," 3rd Ed., Transilvania University Press, Brasov, pp. 143-144 (2012)

2.
A. V. Oppenheim, R. W. Schafer and J. Buck, "Discrete-Time Signal Processing," 2nd Ed., Prentice Hall, Upper Saddle River, New Jersey, pp. 306-307 (1989)

3.
M. Wickert, "Signals and Systems for Dummies," John Wiley & Sons, p. 165 (2013)

4.
R. G. Lyons, "Understanding Digital Signal Processing," 3rd Ed., Prentice Hall, Upper Saddle River, New Jersey, pp. 275-278 (2010)

5.
L. Jackson, "Roundoff-noise analysis for fixedpoint digital filters realized in cascade or parallel form," IEEE Trans. Audio Electroacoustics, Vol. 18(2), pp. 107-122 (1970) crossref(new window)

6.
J. F. Kaiser, "Some practical considerations in the realization of linear digital filters," Proc. 3rd Annual Allerton Conference on Circuit and System Theory, pp. 621-633 (1965)

7.
L. R. Rabiner and C. M. Rader, "Digital Signal Processing," Prentice Hall, Englewood Cliffs, New Jersey, p. 406 (1989)