Self-Evaluation of PANDA-FBG Based Sensing System for Dynamic Distributed Strain and Temperature Measurement

Area of Science:

• Optical Fiber Sensing
• Instrumentation and Measurement

Background:

• Current methods for evaluating polarization-maintaining fiber Bragg grating (PANDA-FBG) sensing systems often rely on external sensors like strain gauges and thermocouples.
• This conventional approach complicates the system and reduces efficiency due to the need for multiple sensor types for the same measurement.

Purpose of the Study:

• To develop a novel, self-evaluation method for PANDA-FBG distributed dynamic strain and temperature sensing systems.
• To enhance the applicability and reliability of PANDA-FBG sensing systems by enabling self-performance assessment.

Main Methods:

• Utilized the approximately constant ratio of primary errors in strain and temperature measurements.
• Implemented a self-evaluation mechanism within the PANDA-FBG sensing system.

Main Results:

• Successfully realized a self-evaluation capability for the PANDA-FBG sensing system.
• Demonstrated a method to effectively evaluate the performance of the sensing system without external sensors.

Conclusions:

• The proposed self-evaluation method significantly enhances the applicability and reliability of PANDA-FBG sensing systems.
• This approach simplifies system design and improves efficiency in dynamic strain and temperature monitoring.