Fiber Optic Fiber Bragg Grating Sensing for Monitoring and Testing of Electric Machinery: Current State of the Art and Outlook

Abstract

This paper presents a review of the recent trends and the current state of the art in the application of fiber optic fiber Bragg gratings (FBG) sensing technology to condition the monitoring (CM) and testing of practical electric machinery and the associated power equipment. FBG technology has received considerable interest in this field in recent years, with research demonstrating that the flexible, multi-physical, and electromagnetic interference (EMI) immune in situ sensing of a multitude of physical measurands of CM interest is possible and cannot be obtained through conventional sensing means. The unique FBG sensing ability has the potential to unlock many of the electric machine CM and design validation restrictions imposed by the limitations of conventional sensing techniques but needs further research to attain wider adoption. This paper first presents the fundamental principles of FBG sensing. This is followed by a description of recent FBG sensing techniques proposed for electric machinery and associated power equipment and a discussion of their individual benefits and limitations. Finally, an outlook for the further application of this technique is presented. The underlying intention is for the review to provide an up-to-date overview of the state of the art in this area and inform future developments in FBG sensing in electric machinery.

A Low-Frequency Fiber Bragg Grating Acceleration Sensor Based on Spring Support and Symmetric Compensation Structure with Flexible Hinges

“…One of the key pieces of equipment for acquiring vibration signals is the acceleration sensor, which is widely used in the monitoring of large structures and for ensuring environmental safety. Compared to traditional electrical acceleration sensors, as an advanced optical fiber-sensing technology, fiber Bragg grating technology offers high sensitivity, a wide frequency response range, low noise, and strong resistance to electromagnetic interference, making it a research hotspot in the field of acceleration sensors [5][6][7][8].…”

Sensitivity analysis of FBG sensors for detection of fast temperature changes

“…Optical fiber is a consolidate technology with the primary property of transmitting a light signal inside itself [1]. Because of this property, optical fiber has revolutionised the communication industry as well as a wide range of novel technical applications [2]- [8]. However, throughout the last several decades, one of the most explored elements of scientific study has been the application of optical technology for sensor creation [9]- [11].…”