Swedish fiber optic strain gauge

Fiber optic strain gauges are advanced sensors that measure mechanical strain using optical fibers, offering high precision, immunity to electromagnetic interference, and suitability for harsh environments.

Overview of Fiber Optic Strain Gauges

Fiber optic strain gauges use optical fibers embedded in elastic materials to detect deformation. When the material stretches or compresses, the physical properties of the fiber change, altering the light passing through it, which can be measured to determine strain . Many of these sensors are based on fiber Bragg gratings (FBGs), where strain changes the grating period and shifts the Bragg wavelength, allowing precise strain measurement .

Advantages

• High precision and sensitivity: Capable of detecting very small deformations with sub-millimeter spatial resolution .
• Electromagnetic immunity: Ideal for environments with high electrical interference, such as power plants or electric locomotives .
• Harsh environment suitability: Resistant to humidity, corrosion, and extreme temperatures, making them suitable for marine, offshore, and industrial applications .
• Long-distance monitoring: Can measure strain over long optical fibers, sometimes up to 100 km, enabling distributed sensing for pipelines, railways, and large structures .
• Safety: Intrinsically non-explosive and suitable for hazardous zones, including ATEX/IECEx-certified applications .

Applications

Fiber optic strain gauges are widely used in civil engineering, structural health monitoring, and industrial systems. Examples include:

• Monitoring bridges, dams, and concrete structures for stress and deformation .
• Integration into composite materials for aerospace or automotive applications .
• Long-term monitoring in hydroelectric plants, oil rigs, and electrical transformers .
• Distributed sensing along pipelines, highways, and railways for strain, temperature, and acoustic phenomena .

Swedish Context

While the web results do not list a specific Swedish manufacturer, Sweden has a strong engineering and industrial sector, and companies there often integrate fiber optic strain gauges from international suppliers or develop custom solutions for civil and industrial monitoring. Swedish research institutions and engineering firms may also collaborate with global suppliers to implement FBG-based or distributed fiber optic sensing systems in infrastructure projects.

Conclusion

Swedish fiber optic strain gauges, whether locally manufactured or imported, leverage the advantages of optical sensing: high precision, immunity to interference, and suitability for harsh or hazardous environments. They are particularly valuable for structural health monitoring, industrial safety, and long-distance distributed sensing, making them a versatile choice for modern engineering applications .