Innovative Optical Fiber Sensors for Automotive Fluid Monitoring
Title Alternative:Innovative Optical Fiber Sensors for Automotive Fluid Monitoring
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Date
2025-11-12T00:00:00Z
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Abstract
This doctoral thesis presents the design, fabrication, and experimental evaluation of three innovative optical fiber sensors developed for monitoring critical automotive fluids. The first sensor detects moisture content in glycol-based brake fluid using nanomaterial-enhanced optical fibers. Sensitivity was significantly improved through the application of silica nanofibers and aerogels, with further enhancement achieved by introducing an air gap. The second sensor measures liquid level using refractive index contrast at discrete immersion points, demonstrating fast dynamic response and improved signal reliability under laboratory conditions. The third sensor distinguishes between gasoline and diesel based on their optical properties, offering a compact, low-cost concept for misfueling prevention. All sensors were evaluated in terms of repeatability and measurement uncertainty, with theoretical assessments addressing temperature influence and practical protection strategies. The results demonstrate the sensors' capability for real-time fluid monitoring and highlight their potential as scalable, dielectric-safe alternatives to conventional electronic systems in future automotive applications.
This doctoral thesis presents the design, fabrication, and experimental evaluation of three innovative optical fiber sensors developed for monitoring critical automotive fluids. The first sensor detects moisture content in glycol-based brake fluid using nanomaterial-enhanced optical fibers. Sensitivity was significantly improved through the application of silica nanofibers and aerogels, with further enhancement achieved by introducing an air gap. The second sensor measures liquid level using refractive index contrast at discrete immersion points, demonstrating fast dynamic response and improved signal reliability under laboratory conditions. The third sensor distinguishes between gasoline and diesel based on their optical properties, offering a compact, low-cost concept for misfueling prevention. All sensors were evaluated in terms of repeatability and measurement uncertainty, with theoretical assessments addressing temperature influence and practical protection strategies. The results demonstrate the sensors' capability for real-time fluid monitoring and highlight their potential as scalable, dielectric-safe alternatives to conventional electronic systems in future automotive applications.
This doctoral thesis presents the design, fabrication, and experimental evaluation of three innovative optical fiber sensors developed for monitoring critical automotive fluids. The first sensor detects moisture content in glycol-based brake fluid using nanomaterial-enhanced optical fibers. Sensitivity was significantly improved through the application of silica nanofibers and aerogels, with further enhancement achieved by introducing an air gap. The second sensor measures liquid level using refractive index contrast at discrete immersion points, demonstrating fast dynamic response and improved signal reliability under laboratory conditions. The third sensor distinguishes between gasoline and diesel based on their optical properties, offering a compact, low-cost concept for misfueling prevention. All sensors were evaluated in terms of repeatability and measurement uncertainty, with theoretical assessments addressing temperature influence and practical protection strategies. The results demonstrate the sensors' capability for real-time fluid monitoring and highlight their potential as scalable, dielectric-safe alternatives to conventional electronic systems in future automotive applications.
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Optical fiber sensor, electrospinning, silica nanofibers, gum arabic, silica aerogel, intensity modulated optical fiber sensor, refractive index, optical properties of nanofibers and aerogel, humidity, moisture sensors, air gap, and sensitivity.