Fiber Bragg Grating (FBG) Fiber Optic Smart Bolt

Name: Fiber Bragg Grating (FBG) Fiber Optic Smart Bolt
Brand: T&S Communications Co., Ltd.

Identifier: 160024

~1.2pm/με | -40°C~85°C | FC/APC

Features

Passive operation and immune to electromagnetic interference
Excellent linearity
High repeatability
Integrated temperature compensation
Capable of monitoring bolt loosening and fatigue

Specification Drawings Request Quote

Product Description of Fiber Bragg Grating (FBG) Fiber Optic Smart Bolt

The Fiber Optic Smart Bolt is an intelligent structural component that utilizes Fiber Bragg Grating (FBG) technology to measure internal strain through spectral variations. It enables real-time monitoring of bolt preload, deformation, loosening, fatigue, and other key parameters.

Specifications

Item	Unit	Specification
Linearity between wavelength and torque	%	≥99.9
Strain coefficient of wavelength	pm/uε	~1.2
Torque vs. preload relationship	-	Linear
Correlation coefficient of repeated torque-wavelength tests	-	~0.999
Number of Bragg gratings	-	2 (strain grating & temperature compensation grating)
Temperature compensation	-	Yes
Operating temperature range	℃	-40~+85
Bolt size requirement	mm	Diameter ≥10, Length ≥6
Connector	-	FC/APC (or customizable)

Applications

Tower cranes
Wind power equipment
Construction elevators and hoists
Power transmission lines
Railway tracks
Signal towers

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