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Related Concept Videos

Measurements of Strain01:27

Measurements of Strain

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 gauge...
Design Example: Strain Gauge Bridge or Wheatstone Bridge01:15

Design Example: Strain Gauge Bridge or Wheatstone Bridge

The utilization of strain gauges as transducers for converting mechanical strain into electrical signals is a common practice in various engineering applications. These strain gauges are frequently integrated into Wheatstone bridge circuits to accurately measure parameters such as force or pressure. Within this context, each element within the circuit exhibits a resistance that undergoes subtle variations when subjected to mechanical strain. The primary objective is to convert minuscule...

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Related Experiment Video

Updated: Jun 8, 2026

Production of a Strain-Measuring Device with an Improved 3D Printer
06:17

Production of a Strain-Measuring Device with an Improved 3D Printer

Published on: January 30, 2020

Optical-fiber strain sensors with asymmetric etched structures.

M Vaziri, C L Chen

    Applied Optics
    |September 22, 2010
    PubMed
    Summary

    New optical-fiber strain gauges with asymmetric etched structures offer high sensitivity (gauge factor up to 170) and a wide frequency response. Their performance is linked to structural asymmetry and etching details.

    Area of Science:

    • Photonics and Materials Science
    • Optical Sensor Technology

    Background:

    • Optical-fiber sensors are crucial for precise measurements.
    • Existing strain gauges have limitations in sensitivity and frequency response.

    Purpose of the Study:

    • To analyze, fabricate, and test novel optical-fiber strain gauges.
    • To investigate the impact of asymmetric etched structures on sensor performance.
    • To understand the underlying physical principles governing sensor sensitivity.

    Main Methods:

    • Fabrication and experimental testing of optical-fiber strain gauges.
    • Finite-element method (FEM) for structural analysis under tensile stress.
    • Ray-tracing technique to correlate structural deformation with optical attenuation.

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    Last Updated: Jun 8, 2026

    Production of a Strain-Measuring Device with an Improved 3D Printer
    06:17

    Production of a Strain-Measuring Device with an Improved 3D Printer

    Published on: January 30, 2020

    A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
    08:23

    A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

    Published on: September 30, 2019

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

    Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

    Published on: November 7, 2016

    Main Results:

    • Achieved high gauge factor (up to 170) and flat frequency response to 2.7 kHz.
    • FEM analysis revealed axial stretching induces lateral bends in etched fibers.
    • Ray-tracing confirmed the relationship between lateral bending, structural deformation, and optical attenuation.
    • Sensitivity is dependent on structural asymmetry and the number of etched sections.

    Conclusions:

    • Asymmetric etched structures significantly enhance optical-fiber strain gauge sensitivity.
    • The developed sensors demonstrate excellent performance characteristics for strain monitoring.
    • The combination of FEM and ray-tracing provides a robust framework for sensor design optimization.