Fiber optic temperature profiling for thermal protection heat shields

Black, Richard J.; Costa, Joannes M.; Moslehi, Behzad; Zarnescu, Livia; Hackney, Drew; Peters, Kara

doi:10.1117/12.2057942

Cited by 6 publications

(5 citation statements)

References 9 publications

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“…When a broadband light is illuminated into the fiber, a narrow wavelength range will be reflected due to the refractive index change induced by grating. The change of the reflected wavelength indicates the status of the FBG sensors such as strain 12 and temperature 13,14 .…”

Section: Review Of Previous Workmentioning

confidence: 99%

Lamb wave-based damage detection of composite shells using high-speed fiber-optic sensing

Sotoudeh

Black

Moslehi

et al. 2014

Smart Sensor Phenomena, Technology, Networks, and Systems Integration 2014

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A Lamb wave-based damage identification method called damage imaging method for composite shells is presented. A damage index (DI) is generated from the delay matrix of the Lamb wave response signals, and it is used to indicate the location and approximate area of the damage. A piezoelectric actuator is employed to generate the Lamb waves that are subsequently captured by a fiber Bragg grating (FBG) sensor element array multiplexed in a single fiber connected to a high-speed fiber-optic sensor system. The high-speed sensing is enabled by an innovative parallel-architecture optical interrogation system. The viability of this method is demonstrated by analyzing the numerical and experimental Lamb wave response signals from laminated composite shells. The technique only requires the response signals from the plate after damage, and it is capable of performing near real-time damage identification. This study sheds some light on the application of a Lamb wave-based damage detection algorithm for curved plate/shell-type structures by using the relatively low frequency (around 100 kHz) Lamb wave response and the high-speed FBG sensor system.

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Section: Review Of Previous Workmentioning

confidence: 99%

Lamb wave-based damage detection of composite shells using high-speed fiber-optic sensing

Sotoudeh

Black

Moslehi

et al. 2014

Smart Sensor Phenomena, Technology, Networks, and Systems Integration 2014

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“…They are effective for multi-point sensing of both temperature 15 and strain 16 depending on how they are configured. We have found them to be particularly suited for integration with MRI-compatible biopsy needles and dynamic measurements therein 12,17,18 .…”

Section: Needle Characterization Using Fbg Temperature Arraysmentioning

confidence: 99%

“…Note that we used the same temperature sensing arrays as we used in Reference15 together with the calibration provided therein . Proc.…”

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confidence: 99%

Characterization of optically actuated MRI-compatible active needles for medical interventions

et al. 2014

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The development of a Magnetic Resonance Imaging (MRI) compatible optically-actuated active needle for guided percutaneous surgery and biopsy procedures is described. Electrically passive MRI-compatible actuation in the small diameter needle is provided by non-magnetic materials including a shape memory alloy (SMA) subject to precise fiber laser operation that can be from a remote (e.g., MRI control room) location. Characterization and optimization of the needle is facilitated using optical fiber Bragg grating (FBG) temperature sensors arrays. Active bending of the needle during insertion allows the needle to be accurately guided to even relatively small targets in an organ while avoiding obstacles and overcoming undesirable deviations away from the planned path due to unforeseen or unknowable tissue interactions. This feature makes the needle especially suitable for use in image-guided surgical procedures (ranging from MRI to CT and ultrasound) when accurate targeting is imperative for good treatment outcomes. Such interventions include reaching small tumors in biopsies, delineating freezing areas in, for example, cryosurgery and improving the accuracy of seed placement in brachytherapy. Particularly relevant are prostate procedures, which may be subject to pubic arch interference. Combining diagnostic imaging and actuation assisted biopsy into one treatment can obviate the need for a second exam for guided biopsy, shorten overall procedure times (thus increasing operating room efficiencies), address healthcare reimbursement constraints and, most importantly, improve patient comfort and clinical outcomes.

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“…Given appropriate coatings and/or packaging, optical fiber sensors fare relatively well in both cryogenic [71] and elevated temperature [54] environments including those encountered in aerospace, nuclear reactor, geothermal [73] and thermal protections system (TPS) [1], [52]- [54], [76] applications. Figure 12 shows an example setup for temperature monitoring with an FBG array in a TPS tile subjected to heat from one side as may be the case for a re-entry vehicle.…”

Section: B Extreme-temperature Environmentsmentioning

confidence: 99%

A Review of Fiber Optic Technology for Turbine Engine Instrumentation Channel: Control, PHM, and Test Cell Applications

Pakmehr¹,

Behbahani²,

Moslehi³

et al. 2014

50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference

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The next generation of gas turbine engines will potentially have Full Authority Digital Eengine Control (FADEC) Systems that consists of wired, wireless, and fiber optics technologies. This paper focuses on the fiber optics technologies for engine applications. Optical fiber sensors have the potential to deliver new and effective measurement in many applications aided by the following properties: (a) immunity to and non-generation of electromagnetic interference (EMI), (b) electrical passivity and thus safety in explosive environments, (c) transmission of sensed information over long distances and through difficult to access regions, (d) very small diameter size allowing integration into smart materials, (d) high durability in many environments, (e) minimal mass, particularly important in aerospace applications, (f) geometric flexibility coupled with capability for multiple functionality, enabling "non-line-of-sight" measurements and contributing to ease of installation compared with alternative approaches. For practical application a fiber optic sensing system needs to include: sensors, fiber optic link, interrogator (comprising photonics, electronics and firmware/software), data interpretation and decision-aid algorithms/software. Fiber optics for diagnostics and troubleshooting are used in varying capacities to test, measure, analyze, transmit, distribute, and/or simulate an optical signal with which procedures and processes associated with maintenance, problem solving, and calibration of equipment and/or networks can be performed. With all the scientific and engineering advancements in the field of fiber optic sensing, the maturity of this technology is high enough and well beyond the experimental lab environment. With its rather low cost, fiber optics sensing technology is a proper option for turbine engine industry.

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Fiber optic temperature profiling for thermal protection heat shields

Cited by 6 publications

References 9 publications

Lamb wave-based damage detection of composite shells using high-speed fiber-optic sensing

Lamb wave-based damage detection of composite shells using high-speed fiber-optic sensing

Characterization of optically actuated MRI-compatible active needles for medical interventions

A Review of Fiber Optic Technology for Turbine Engine Instrumentation Channel: Control, PHM, and Test Cell Applications

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