A miniature fiber-optic Fabry–Perot (FP) accelerometer based on phase demodulation is
demonstrated for improving sensitivity. The accelerometer is composed of a 11.5 mm …

This article presents machinery fault diagnosis in electric motors through mechanical
vibration monitoring. Using a commercial machinery fault simulator, two fiber Bragg grating …

Sensing an incoming acoustic signal is typically associated with absorbing the energy,
perturbing the measurement and therefore causing a deformation of the sensing elements …

In recent years, condition monitoring has become the leading method for diagnosing the
health of motor-based machines, with motor vibration or strain being a critical parameter for …

Conventional ultrasonic sensors are significantly affected by low temperatures. This results
in the difficulty of acoustic emission (AE) detection at cryogenic temperatures (CTs). In this …

Acoustic emission (AE) location is important for finding the structural crack and ensuring the
structural safety. Fiber laser sensors have ability to replace traditional piezoelectric sensors …

In this article, we propose and demonstrate a fiber optic ultrasound sensing technique using
a polarization-maintaining fiber loop mirror (PMF-LM) to achieve an enhanced signal-to …

Mixing multi-source vibration signals presents a major challenge in target recognition in
distributed fiber optic acoustic sensor systems. This article proposes a deep learning method …

The signal-to-noise ratio (SNR) is a crucial parameter for assessing audio transmission
quality and fiber optic acoustic sensors. This study presents a model for predicting the SNR …

This letter presents the development of a high-resolution all-fiber strain sensing system
using a narrow linewidth Brillouin-random laser (BRL) in conjunction with a fiber Bragg …