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Fiber Optic Sensor Offers Better Monitoring

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A new fiber optic acceleration sensor can be used for the high-frequency measurement of small vibrations, which could lead to better condition monitoring of rotating machines such as turbines, pumps, motors and vehicles.



Brüel & Kjær's SmartAccel-HF sensor. Courtesy of B&K.

Developed by Brüel & Kjær (B&K) and licensed to Smart Fibres of Bracknell, England, the sensor — fiber Bragg grating (FBG) technology called SmartAccel-HF — operates on a single axis and can tolerate extreme environments.

The use of fiber optics allows signals to be transmitted over distances of several kilometers. The sensor needs no power to operate and is immune to the effects of electromagnetic interference. It can measure vibrations from DC up to 900 Hz and has a 200-g dynamic range.

“One of the key advantages of FBG technology is the ability to multiplex numerous sensors of different measure and types on a few optical fibers,” said Chris Staveley, CEO of Smart Fibres.

The sensor could also be used as part of an integrated fiber optic system that monitors subsea pumps for the oil and gas industry.

For more information, visit www.bksv.com.
PI Physik Instrumente - Revolution In Photonics Align LW MR3/24

Published: February 2014
Glossary
fiber bragg grating
A fiber Bragg grating (FBG) is a type of optical filter that is inscribed or "written" into the core of an optical fiber. It consists of a periodic modulation of the refractive index along the length of the fiber. This modulation forms a grating structure that reflects a specific wavelength of light while transmitting others. Key features of FBGs include: Periodic modulation: The refractive index of the optical fiber's core is periodically modulated, creating a series of alternating high...
sensor
1. A generic term for detector. 2. A complete optical/mechanical/electronic system that contains some form of radiation detector.
BusinessDenmarkelectromagneticEnglandEuropeFBGfiber Bragg gratingfiber opticshigh-frequencyindustrialmotorssensorTest & MeasurementturbinesvibrationsBrüel & KjærB&KSmart FibresSmartAccel-HF

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