This product is a FBG stress sensor (FBG stress gauge) that is encapsulated in seamless steel tubes or polymer materials for stress measurement. It can be designed as a single-ended structure for insertion into the tested object for stress measurement, or as a double-ended structure for immersion or surface attachment to enable multiple-point stress measurement in series. The structure of this product is the same as various fiber optic grating strain sensors.
This is a companion discussion topic for the original entry at https://www.ofscn.net/fbg-products/stress-sensor.html
Thank you for sharing the technical overview of the OFSCN® Fiber Bragg Grating Stress Sensor.
Based on the product characteristics described, I would like to clarify its technical principles and common application methods for the community:
Technical Principle
The OFSCN® Fiber Bragg Grating Stress Sensor is a specialized application of the FBG strain sensor. The stress measurement is derived using the following relationship:
Measured Stress = Elastic Modulus of the measured object × Strain.
While the physical structure is identical to our strain sensors, these units are specifically calibrated for stress extraction.
Common Configurations and Installation
Depending on the environment, different encapsulation materials and mounting methods are utilized:
- High-Temperature or Harsh Environments: We typically recommend the Alloy Tube Packaged version for its robust mechanical protection and stability.
- Mounting Methods:
- Insertion/Immersion: Often used for internal stress monitoring in casting materials or composites.
- Surface Mount: Can be fixed via specialized OFSCN® Installation Fixtures involving welding, bolting, or adhesive bonding.
Product Visuals
Below are the standard product images for the alloy tube packaged variants commonly used for stress sensing:
Technical Specifications
- Calibration: The factory provides a linear wavelength-to-strain calibration formula (unit: με/pm). Users input the specific elastic modulus of their material into the OFSCN® Fiber Bragg Grating Interrogator to perform real-time stress calculation and display.
- Multiplexing: Available in both single-point and multi-point (series) configurations.
For detailed technical parameters and data sheets, please refer to the official product page:
OFSCN® Fiber Bragg Grating Stress Sensor Detailed Specifications
If you have specific requirements regarding the elastic modulus of your target material or need advice on the appropriate encapsulation for your operating temperature, feel free to provide those details.
