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Related Concept Videos

Measurements of Strain01:27

Measurements of Strain

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Strain quantifies the deformation of a material under force, typically measured as normal strain, which represents the change in length when compared with the original length. Electrical strain gauges are used for enhanced accuracy. These devices consist of a conductive wire mounted on a paper backing that adheres to the material's surface. These gauges operate on the piezoresistive effect, where the wire's electrical resistance changes in response to mechanical deformation. The strain...
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Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over...
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Temperature Dependent Deformation01:12

Temperature Dependent Deformation

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In a nonhomogeneous rod made up of steel and brass, restrained at both ends and subjected to a temperature change, several steps are involved in calculating the stress and compressive load. Due to the problem's static indeterminacy, one end support is disconnected, allowing the rod to experience the temperature change freely. Next, an unknown force is applied at the free end, triggering deformations in the rod's steel and brass portions. These deformations are then calculated and added...
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Related Experiment Video

Updated: Jan 1, 2026

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
09:48

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Published on: November 7, 2016

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0.5 mm spatial resolution distributed fiber temperature and strain sensor with position-deviation compensation based

Mingming Luo, Jianfei Liu, Caijie Tang

    Optics Express
    |December 28, 2019
    PubMed
    Summary
    This summary is machine-generated.

    We developed a 0.5 mm resolution distributed fiber sensor using Optical Frequency Domain Reflectometry (OFDR). This sensor accurately measures temperature and strain, even in harsh environments, with high spatial resolution.

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    Area of Science:

    • Optoelectronics
    • Materials Science
    • Sensor Technology

    Background:

    • Distributed fiber optic sensors offer remote and real-time monitoring capabilities.
    • Achieving high spatial resolution in distributed sensing is challenging due to signal degradation.
    • Existing methods struggle with accuracy at sub-millimeter resolutions.

    Purpose of the Study:

    • To develop a distributed fiber optic sensor with 0.5 mm spatial resolution.
    • To implement position-deviation compensation for improved cross-correlation of Rayleigh spectra.
    • To demonstrate the sensor's capability for precise temperature and strain measurements.

    Main Methods:

    • Utilizing Optical Frequency Domain Reflectometry (OFDR) for high-resolution sensing.
    • Implementing a novel position-deviation compensation technique.
    • Conducting experiments with gold-coated and polyimide-coated fibers for temperature and strain tests.

    Main Results:

    • Successfully demonstrated a 0.5 mm resolution distributed fiber sensor.
    • Achieved 0.5 mm strained fiber segment recognition with 50,000 measurement points.
    • Obtained temperature repeatability of ±0.9 °C and strain accuracy of ±15 µɛ.

    Conclusions:

    • The developed sensor achieves unprecedented spatial resolution for distributed fiber sensing.
    • Position-deviation compensation is crucial for maintaining spectral correlation at high resolutions.
    • The sensor is suitable for demanding applications in astronautics, advanced materials, and nuclear facilities.