Material features based compensation technique for the temperature effects in a polymer diaphragm-based FBG pressure...

Area of Science:

• Sensor Technology
• Materials Science
• Mechanical Engineering

Background:

• Fiber Bragg Grating (FBG) sensors are versatile for measuring various physical parameters.
• Embedding FBGs on polymer diaphragms enables pressure, liquid level, and vibration sensing.
• Polymer mechanical properties vary with temperature, causing cross-sensitivity in FBG sensors.

Purpose of the Study:

• To develop and present a compensation technique for temperature effects on oblong polymer diaphragm-based FBG pressure sensors.
• To overcome the cross-sensitivity issue caused by temperature variations in polymer diaphragm materials.

Main Methods:

• Developed an analytical model incorporating temperature-dependent diaphragm properties.
• Utilized dynamic mechanical analysis to characterize diaphragm material behavior.
• Implemented a compensation technique based on the analytical model.

Main Results:

• The developed compensation technique effectively reduces cross-sensitivity to approximately 1.74 Pa/°C.
• The technique demonstrates superior performance compared to existing methods in terms of cross-sensitivity and root mean squared error.

Conclusions:

• The proposed compensation technique significantly enhances the accuracy of polymer diaphragm-based FBG pressure sensors.
• This method offers a robust solution for mitigating temperature-related cross-sensitivity in FBG sensing applications.