Search Results - wave+propagation

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Portable Railroad Spike Inspection System based on Acoustic Signals
Reference #: 01567 The University of South Carolina is offering licensing opportunities for Portable Railroad Spike Inspection System based on Acoustic Signals Background: It is reported that broken spikes were observed frequently, including cut spikes, screw spikes, and driven spikes that were used to restrict both tie plates and rails. Since the...
Published: 7/10/2026   |   Updated: 7/21/2022   |   Inventor(s): Yu Qian, Jun Liu
Keywords(s): acoustic emission, hammer excitation, microphone, non-destructive testing, railroad spike, sound wave frequency and pattern, wave propagation
Category(s): Engineering and Physical Sciences
Laser-Based Non-Destructive Spike Defect Inspection System
Reference #: 01473 The University of South Carolina is offering licensing opportunities for Laser-based Non-destructive Spike Defect Inspection System Background: Although many new types of elastic fasteners and concrete ties have been introduced recently, cut spikes (referred as spike hereafter) together with tie plates and timber ties are the dominant...
Published: 7/10/2026   |   Updated: 5/7/2021   |   Inventor(s): Yu Qian
Keywords(s): acoustic emission, laser excitation, non-destructive testing, railroad spike, wave propagation
Category(s): Engineering and Physical Sciences