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Related Experiment Video

Updated: Jun 16, 2026

Stress Distribution During Cold Compression of Rocks and Mineral Aggregates Using Synchrotron-based X-Ray Diffraction
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Stress Distribution During Cold Compression of Rocks and Mineral Aggregates Using Synchrotron-based X-Ray Diffraction

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Diffractographic dynamometer.

T R Pryor, O L Hageniers, W P North

    Applied Optics
    |January 30, 2010
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a modified diffractographic sensor for measuring shaft torque and horsepower. The enhanced sensor provides a quasi-digital output linearly proportional to horsepower or torque, improving upon previous visual measurement methods.

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    Area of Science:

    • Mechanical Engineering
    • Optical Sensing
    • Instrumentation

    Background:

    • A previous study introduced a diffractographic sensor for torque measurement using visual analysis of diffraction patterns.
    • The sensor's fringe spacing was found to be linearly related to applied torque.

    Purpose of the Study:

    • To describe a modification of the diffractographic sensor for electronic readout of torque and horsepower.
    • To develop a quasi-digital output for improved measurement resolution and data processing.

    Main Methods:

    • Modification of a single slit diffractographic sensor.
    • Development of electronic circuitry to process diffraction pattern changes.
    • Generation of pulse bursts proportional to horsepower or torque.

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    Last Updated: Jun 16, 2026

    Stress Distribution During Cold Compression of Rocks and Mineral Aggregates Using Synchrotron-based X-Ray Diffraction
    10:36

    Stress Distribution During Cold Compression of Rocks and Mineral Aggregates Using Synchrotron-based X-Ray Diffraction

    Published on: May 20, 2018

    Crack Monitoring in Resonance Fatigue Testing of Welded Specimens Using Digital Image Correlation
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    Published on: September 29, 2019

    A Method for Studying the Temperature Dependence of Dynamic Fracture and Fragmentation
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    Main Results:

    • A modified sensor produces a pulse burst frequency linearly proportional to horsepower.
    • An alternative version generates a pulse burst count linearly proportional to torque.
    • Both versions maintain high resolution and advantages of the original sensor.

    Conclusions:

    • The modified diffractographic sensor offers a quasi-digital and high-resolution method for measuring shaft horsepower and torque.
    • A minor limitation is a small dead zone for near-zero measurements in the horsepower readout.