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Advantages
l Rugged package protection
l Stable and accurate detection signal
l Fast, simple, permanent installation
l Multiplexing and multiaccess capabilities reducing cabling configuration
l Ideal remote and long-term sensing ability
l Combinable with other WASAN-series sensors
l Double ended design support sensor array
l Supportable for both positive and negative stress measurements
Applications
l Suited for structural health monitoring in large civil engineering, such as stress measurements for concrete reinforcements and anchors.
l Applicable for structural health monitoring in heavy loading machinery.
Description
The WASAN-OFS-AR01 is an anchor stress sensor based on optical Fiber Bragg Grating (FBG) sensing technology. The design of WASAN-OFS-AR01 is suitable for reliable and accurate strain measurement with full consideration of mechanical and installation characteristics.
With a high-strength steel package this sensor possesses excellent mechanical properties to ensure enhanced fatigue resistance. The WASAN-OFS-AR01 includes a second FBG which provides active temperature compensation, which enables absolute and accurate strain measurement. WASAN-series sensors employ the unique optical device packaging method to ensure the long-term sensing stability and the ability to measure both positive and negative strains.
The typical installation of WASAN-OFS-AR01 is shown in the following diagram. Armored cables make both installation and fiber protection fast and easy during measurement.
The WASAN-OFS-AR01 can be used alone or in series as a part of an FBG array. Double ended design and low bending loss support multiplexing of many sensors on one single fiber even if kilometers apart. Installation of such arrays will be more economical and maintainable for large measurement networks.
WASAN-OFS-AR01 Installation Diagram
Anchor Stress Sensor (WASAN-OFS-AR01)
Specifications | OFS-AR01 |
Performance Properties | |
Measurement range | ±500 Mpa |
Resolution | 0.01 Mpa |
Accuracy | 0.5% F.S. |
Physical Properties | |
Dimensions | Largest part of the main body is 320±3 × Φ45 mm |
Shell Material | Stainless alloy steel |
Fiber Type | Single mode fiber |
Cable Type | Φ5 mm armored optical cable |
Connectorization | FC/APC or fusing |
Cable Bend Radius | 5 cm |
Fiber core and coating diameter | Welding + mechanical thread |
Optical Properties | |
Peak Reflectivity (Rmax) | > 90% |
FWHM (-3 dB point) | 0.25 nm |
Notes:
1. The typical initial wavelength of the FBG sensor is from 1525.00nm to 1580.00nm.
2. To achieve measurement accuracy as presented in this datasheet, the sensor should be used with the Rugged Temperature Sensor WASAN-OFS-AR01Shell Material high speed interrogator WASAN-OSI-16.
3. For special coating FBG please contact wasan@wasan.mo
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