scholarly journals Multipath interference test method using synthesized chirped signal from directly modulated DFB-LD with digital-signal-processing technique

2011 ◽  
Vol 19 (26) ◽  
pp. B756 ◽  
Author(s):  
Kazuo Aida ◽  
Toshihiko Sugie
Keyword(s):  
Signal Processing ◽  
Digital Signal Processing ◽  
Digital Signal ◽  
Processing Technique ◽  
Test Method ◽  
Signal Processing Technique ◽  
Multipath Interference ◽  
Interference Test

Detecting Fatigue Cracks in Gears by Amplitude and Phase Demodulation of the Meshing Vibration

1986 ◽  
Vol 108 (2) ◽  
pp. 165-170 ◽  
Author(s):  
P. D. McFadden
Keyword(s):  
Signal Processing ◽  
Early Detection ◽  
Digital Signal Processing ◽  
Phase Modulation ◽  
Fatigue Cracks ◽  
Digital Signal ◽  
Processing Technique ◽  
Signal Processing Technique ◽  
Signal Average ◽  
Local Defects

A digital signal processing technique is proposed for calculating the amplitude and phase modulation of the tooth meshing vibration of a gear from the signal average of the vibration with application to the early detection of local defects such as fatigue cracks. The importance of phase modulation in the detection of defects is confirmed.

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