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Related Concept Videos

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

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Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
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Experimental Investigation of the Flow Structure over a Delta Wing Via Flow Visualization Methods
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Laser Doppler optical air-data system: feasibility demonstration and systems specifications.

H W Mocker, T J Wagener

    Applied Optics
    |October 14, 2010
    PubMed
    Summary

    A new compact laser Doppler velocimeter provides accurate air velocity measurements, even with vibrations. Its design shows potential for advanced multifunctional air data sensing systems.

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    Area of Science:

    • Optical Engineering
    • Fluid Dynamics
    • Laser Technology

    Background:

    • Accurate air velocity measurement is critical for aviation safety and performance.
    • Existing velocimetry systems can be sensitive to environmental vibrations.
    • Diode-pumped solid-state laser technology offers compact and efficient laser sources.

    Purpose of the Study:

    • To demonstrate a compact laser Doppler velocimeter (LDV) system for accurate air velocity measurements.
    • To present a design concept for an optical air-data system utilizing LDV technology.
    • To explore the potential for multifunctional sensing capabilities.

    Main Methods:

    • Development of a compact LDV system using 1.06 µm diode-pumped solid-state laser technology.
    • Integration of a novel solid-block beam-splitting interferometer.
    • Comparison of backscatter measurements with a reference backscatter sonde.

    Main Results:

    • The demonstrated LDV system achieved accurate Doppler velocity measurements, robust to vibration.
    • Excellent agreement was observed between the system's backscatter measurements and a University of Wyoming sonde.
    • System specifications for a 2.015 µm optical air-data system were determined based on performance.

    Conclusions:

    • The developed compact LDV system is suitable for accurate air velocity measurements in challenging environments.
    • The technology shows significant potential for future multifunctional optical air-data systems.
    • Further development could enable detection of wind shear and wake vortices.