Optical strain sensors, namely those based on Fiber Bragg Grating (FBG) technology, have been gaining increased attention particularly in the field of infrastructure monitoring over the past decades. But how does an optical sensor work? How do we compensate for optical losses? How many sensors can be integrated into one single fiber? Our experts dug deep to provide their best answers for you about all the important questions regarding strain measurement using fiber optical sensors. Click an option below to direct you to the content on the page.
- An Introduction to Optical Strain Measurements
- Basics of Fiber Bragg Grating (FBG) Technology
- Selecting the Right Strain Sensor, Adhesive and Accessories
- Installation of Optical Sensors: All there is to Know
- Applications of Optical Strain Sensors: Looking Beyond
- Acquiring Data with the Right Hardware and Software
- Free Training on Optical Strain Measurements
Strain Measurement with Fiber Bragg Grating Sensors
This paper gives a short introduction to FBG sensors, pointing out their special strengths and weaknesses. It also describes a measuring system which enables strain gauges and FBGs to be measured simultaneously, providing all data processing functions originally developed for the strain gauges also for the FBG signals.
Experimental Stress Analysis
Experimental Stress Analysis (ESA) is the analysis of the mechanical stress state in materials, which is performed though experiments using strain gauge measurements. Learn the existing types of stress, their origin and states, or how to determine stress from measured strains by reading about it below.
Article: How does an optical strain gauge actually work?
For this article, Cristina Barbosa, Product Manager for HBM optical business, explains how optical strain gauges work.
Configuring optical strain sensors
One of the advantages of Fiber Bragg Grating (FBG) technology is its intrinsic multiplexing capability. The sensors can have both specific and different Bragg wavelengths and can be connected in series without compromising the correct reading of the measurements as long as the sensor signals do not overlap.
Optical Fiber Sensors vs. Electrical Strain Gauges
Optical fiber strain gauges that are based on fiber Bragg gratings (FBGs) operate on very different principles than those that govern traditional electrical strain gauges.