High-Speed 3D Railroad Tie Deflection Mapping in Real-Time Using an Array of Air-Coupled Non-contact Transducers

Datta, Diptojit; Hosseinzadeh, Ali Zare; Cui, Ranting; Scalea, Francesco Lanza di

doi:10.1007/978-3-031-07258-1_90

Cited by 1 publication

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“…Images can also be used to develop a machine learning-based technique, aimed at classifying the probed objects. Such a technique can supplement the acoustic signal-based tie/ballast discrimination [ 44 , 45 ]. The classification is based on a texture analysis of the objects observed in the ROIs.…”

Section: Image-based Techniques For Spatial Position Tracking and Obj...mentioning

confidence: 99%

Railroad Sleeper Condition Monitoring Using Non-Contact in Motion Ultrasonic Ranging and Machine Learning-Based Image Processing

Datta

Hosseinzadeh

Cui

et al. 2023

Sensors

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An ultrasonic sonar-based ranging technique is introduced for measuring full-field railroad crosstie (sleeper) deflections. Tie deflection measurements have numerous applications, such as detecting degrading ballast support conditions and evaluating sleeper or track stiffness. The proposed technique utilizes an array of air-coupled ultrasonic transducers oriented parallel to the tie, capable of “in-motion” contactless inspections. The transducers are used in pulse-echo mode, and the distance between the transducer and the tie surface is computed by tracking the time-of-flight of the reflected waveforms from the tie surface. An adaptive, reference-based cross-correlation operation is used to compute the relative tie deflections. Multiple measurements along the width of the tie allow the measurement of twisting deformations and longitudinal deflections (3D deflections). Computer vision-based image classification techniques are also utilized for demarcating tie boundaries and tracking the spatial location of measurements along the direction of train movement. Results from field tests, conducted at walking speed at a BNSF train yard in San Diego, CA, with a loaded train car are presented. The tie deflection accuracy and repeatability analyses indicate the potential of the technique to extract full-field tie deflections in a non-contact manner. Further developments are needed to enable measurements at higher speeds.

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Section: Image-based Techniques For Spatial Position Tracking and Obj...mentioning

confidence: 99%

Railroad Sleeper Condition Monitoring Using Non-Contact in Motion Ultrasonic Ranging and Machine Learning-Based Image Processing

Datta

Hosseinzadeh

Cui

et al. 2023

Sensors

Self Cite

View full text Add to dashboard Cite

show abstract

High-Speed 3D Railroad Tie Deflection Mapping in Real-Time Using an Array of Air-Coupled Non-contact Transducers

Cited by 1 publication

References 6 publications

Railroad Sleeper Condition Monitoring Using Non-Contact in Motion Ultrasonic Ranging and Machine Learning-Based Image Processing

Railroad Sleeper Condition Monitoring Using Non-Contact in Motion Ultrasonic Ranging and Machine Learning-Based Image Processing

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