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Updated: Jun 8, 2026

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
09:03

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

Published on: January 7, 2019

Fiber-optic pressure sensors for internal combustion engines.

R A Atkins, J H Gardner, W N Gibler

    Applied Optics
    |September 24, 2010
    PubMed
    Summary

    Fiber optic sensors using Fabry-Perot interferometers effectively measured gas pressure in internal combustion engines. This technology was tested on Diesel, gasoline, and natural gas engines for reliable performance monitoring.

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    Area of Science:

    • Engineering
    • Optics
    • Materials Science

    Background:

    • Internal combustion engines require precise pressure monitoring for optimal performance and emissions control.
    • Traditional pressure sensors may face limitations in harsh engine environments.
    • Fiber optic sensing offers a robust alternative for in-situ measurements.

    Purpose of the Study:

    • To evaluate the efficacy of embedded fiber Fabry-Perot interferometers (FFPIs) as strain gauges for internal combustion engine pressure monitoring.
    • To demonstrate the applicability of FFPIs across different engine types.

    Main Methods:

    • Two distinct FFPI sensor designs were developed and embedded within engine components.
    • FFPI strain measurements were correlated with gas pressure in Diesel, gasoline, and natural gas engines.
    • Data acquisition and analysis were performed to validate sensor performance.

    Main Results:

    • The embedded FFPIs successfully functioned as strain gauges, providing reliable data.
    • Accurate gas pressure measurements were achieved across all tested engine types.
    • The sensor designs demonstrated resilience in the demanding engine operating conditions.

    Conclusions:

    • Embedded FFPIs are a viable technology for real-time gas pressure monitoring in internal combustion engines.
    • This fiber optic sensing approach offers a promising solution for engine diagnostics and control.
    • The study validates FFPIs for diverse fuel types, including Diesel, gasoline, and natural gas.