FBG strain sensor
The fiber optic Strain Sensor FBGS-01 is a long base strain gauge which measures tension or compression between two fixed points. It is based on Fiber Bragg Grating (FBG) technology. The standard gauge length can be chosen between 250 mm and 2 meters. The sensor has connectors on both ends and can be used alone or in series as a part of an FBG sensor array. Installation and cabling for such arrays is much less expensive and less cumbersome than comparable electronic gauge networks. The Strain Sensor FBGS-01 is the fiber optic equivalent of an electrical strain gauge and can be mounted directly on the surface of a structure by means of an adhesive. The sensor is supplied with two aluminum L-brackets and fasteners which facilitate a mounting on a structure. In this way, the fiber sensor makes direct contact with the surface and therefore accurately measures the strain at the surface. The Strain Sensor FBGS-01 features high accuracy and resolution, and immunity to electric sparks and EMI/RFI. It is suitable for remote sensing and it is possible to install it kilometers away from the measurement unit. It is protected against complete, continuous submersion in water guaranteeing IP68 protection. The fiber optic Strain Sensor FBGS-01 can be used to measure strain changes on the surface of material (due to tension, compression and bending) of metallic or composite structures. This allows for the continuous structural health monitoring of structures, crack and fissure formation in (concrete) walls, monitoring of bridges, dams, buildings, tunnels, ships, trains, and other complex structures etc. Electrical power is not necessary on-site, an interrogator can be placed tens of kilometers away.Features
Applications
Specifications
Sensor length
0.250 m up to 2 m / other on request
Strain range
-0.5 % shortening and +1 % elongation
Strain sensitivity
1.2 pm/με
Operating temperature
-20 °C up to +60 °C
Central wavelength
1510 to 1590 nm, 810-860
Connector type
FC/APC (standard)
Pigtail length
1.0 m (standard)
Anchor material
Aluminum
Cross sensitivity
10 pm/ºC
Protection class
IP68
FBG strain sensors
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