Structural health monitoring (SHM) is vital to the maintenance of civil infrastructures. For rail
transit systems, early defect detection of rail tracks can effectively prevent the occurrence of …

Structural health monitoring and other smart structures gain an increased attention which
can be satisfied by the quasi-distributed optical sensing approach. Serial fiber optic sensors …

Damage detection of railway tracks is vital to ensure normal operation and safety of the rail
transit system. Piezoelectric sensors, which are widely utilized to receive ultrasonic wave …

This contribution shows the interrogation of 4000 serial fiber-Bragg gratings (FBGs) by
means of a hybrid code-division multiplex (CDM)-wavelength-division multiplex (WDM) …

Track status classification is essential for the stability and safety of railway operations
nowadays, when railway networks are becoming more and more complex and broad. In this …

Railways are the most preferable transport system because of their reliability, passenger
safety, and ease to travel. If any misalignment or crack occurs, it creates a loss of lives. If …

The paper demonstrates novel magnetic optical fiber Bragg grating (FBG) sensors based on
magnetostriction material Terfenol-D and ferrofluids. The FBG is an optical fiber with …

The need for improved safety, reliability and efficiency is one of the most important aspects
of the railway industry worldwide. Optical sensors can be used in smart condition monitoring …

This contribution evaluates the potential of a code-division multiplex (CDM) interrogated
fiber optical sensor network, namely a fiber-Bragg grating (FBG) sensor network. The basic …

Defect detection of rail bases is more difficult than heads and webs using conventional
ultrasonic nondestructive testing techniques. This thesis conducts a series of guided wave …