Search results for " Discrete Wavelet Transform"

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Digital signal processing for rail monitoring by means of ultrasonic guided waves

2007

Recent train accidents have reaffirmed the need for developing rail defect detection systems that are more effective than those used today. One of the recent developments in rail inspection is the use of ultrasonic guided waves (UGWs) and non-contact probing techniques to target transverse-type defects. Besides the obvious advantages of non-contact probing, that include robustness and a potential for large inspection speed, such a system can theoretically detect transverse defects under horizontal shelling or head checks. This paper demonstrates the effectiveness of digital signal processing to enhance the damage detection sensitivity of the non-contact system. The method proposed here comb…

Discrete wavelet transformSignal processingEngineeringGuided wave testingbusiness.industryMechanical EngineeringMetals and AlloysWaveletRail inspection Discrete Wavelet Transform Damage Index Laser Ultrasonics Air-coupled Ultrasonic Sensors.Mechanics of MaterialsRobustness (computer science)Rail inspectionMaterials ChemistryElectronic engineeringUltrasonic sensorSettore ICAR/08 - Scienza Delle CostruzionibusinessTelecommunicationsDigital signal processingInsight - Non-Destructive Testing and Condition Monitoring

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