Private: Fiber Bragg Grating (FBG) Sensors
Overview
Stran Technologies offers the highly capable Fiber Bragg Grating (“FBG”) fiber optic strain measurement system technology. Fiber optic FBG strain sensors are growing widely accepted in long-term health monitoring applications. These include bridges, dams, trains, and other complex structures. Surface strain can be measured on various surfaces such as concrete, rock, steel, composite and other materials.
The software included in the strain sensing hardware system is the ideal operating program for fiber optic sensing technology. Every scan of the laser is referenced internally in the interrogator on an inferometer. This allows for better, continuous calibration and ultimately more accurate data analysis. Instrument data is exported in Lab View format.
Applications
-
Continuous long-term health monitoring of bridges, dams, tunnels, ships, aircraft, trains, composite wind turbine blades and other complex structures.
-
Measurements of FBG strain gages, temperature probes, accelerometers, pressure, displacement, and other FBG sensors.
- Deployed on:
- Civil structures (bridges, dams, tunnels, mines, buildings)
- Energy (wind turbines, pipelines, nuclear reactors, solar panel farms)
- Oil & Gas (well reservoir management, platform structural health, pipeline condition)
- Aerospace (airframes, composite structures, wind tunnels, dynamic tests)
- Marine vessels (hull, mast, rudder, deck, cargo containers)
- Transportation (railways, trains, roadways, specialty vehicles, cranes)
- Homeland Security (perimeter intrusion, heat detection, security gate monitoring)
Specifications
| Title | Description |
|---|---|
| Optical Sensing Interrogator | |
| # Channels | 4 |
| Scan Frequency | 1 KHz |
| Wavelength Range | 1510-1590 nm |
| Wavelength Stability | 2 pm typ, 5 pm max |
| Wavelength Repeatability | 1 pm, 0.05 pm with 1,000 averages |
| Dynamic Range | 25 dB with user-selectable gain |
| Typical FBG Sensor Capacity | Up to 80 |
| Internal Peak Detection | Included |
| Spectral Diagnostic View | Included |
| Fiber Optic Connectors | FC/APC |
| Dimensions | 122 mm x 267 mm x 135 mm |
| Weight | 2.5 kg (5.5 lbs) |
| Operating Temperature | 0° to 50°C |
| FBG Strain Sensor | |
| Strain Sensitivity | ~ 1.2pm/με |
| Gage Length | 10 mm |
| Operating Temperature Range | -40° to 60°C |
| Strain Limits | ± 5,000 με |
| Maximum Drift | < 50 με |
| Weight | 1.0 g |
| Cable Length | 1m (±10 cm), each end |
| Cable Type | 1 mm Fiberglass Braid |
| Connectors | FC/APC optional |
| Cable Bend Radius | ≥ 17 mm |
| Fastening Method | Epoxy |
| FBG Temperature Sensor | |
| Operating Temperature Range | -40 to 120°C |
| Temperature Sensitivity | ~10 pm/°C (±1.7pm/°C) |
| Cable Temperature Range | -40 to 250°C (FC/APC Connectors: -40 to 80°C) |
| Response Time | 4.6 seconds |
| Standard Calibration | 1.0°C Long Term Accuracy |
| Dimensions (L x W x H) | 31.8 x 7.6 x 7.6 mm |
| Weight (including cable) | 4.3 g |
| Housing Material | Alumina |
| Cable Length | 1 m (± 10 cm) |
| Cable Bend Radius | ≥ 17 mm |
| Cable Type | 1 mm Fiberglass Blaid |
| Fastening Method | Epoxy |
| Peak Reflectivity (Rmax) | > 70% |
Drawings
