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Related Concept Videos

Equilibrium and Balance01:15

Equilibrium and Balance

The inner ear assumes dual functionalities of auditory perception and equilibrium maintenance. The vestibule is the organ responsible for balance. This organ contains mechanoreceptors, specifically hair cells, endowed with stereocilia, which aid in deciphering information regarding the position and motion of our heads. Two intrinsic components, the utricle and saccule, help perceive head position, while the semicircular canals track head movement. Neurological messages initiated in the...
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The vestibular system is a set of inner ear structures that provide a sense of balance and spatial orientation. This system is comprised of structures within the labyrinth of the inner ear, including the cochlea and two otolith organs—the utricle and saccule. The labyrinth also contains three semicircular canals—superior, posterior, and horizontal—that are oriented on different planes.

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Related Experiment Video

Updated: May 15, 2026

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

Semicircular fiber-based high-sensitivity displacement sensor.

Linlin Xu1, Ying Li, Baojun Li

  • 1State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-Sen University, Guangzhou 510275, China.

Optics Letters
|January 4, 2013
PubMed
Summary
This summary is machine-generated.

A novel semicircular fiber sensor demonstrates precise displacement sensing. The sensor utilizes fiber-bending-induced birefringence to detect transverse displacement with high sensitivity.

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Last Updated: May 15, 2026

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

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Published on: May 23, 2013

Area of Science:

  • Optoelectronics
  • Fiber optics
  • Sensor technology

Background:

  • Fiber optic sensors offer advantages in various sensing applications.
  • Bending-induced birefringence in optical fibers can be exploited for sensing.
  • Developing sensitive and compact displacement sensors is crucial for many fields.

Purpose of the Study:

  • To fabricate and characterize a semicircular fiber (SCF) for displacement sensing.
  • To investigate the relationship between transverse displacement and optical output.
  • To determine the effect of bending radius on sensor sensitivity.

Main Methods:

  • Fabrication of a semicircular fiber using flame-heated treatment.
  • Launching a laser beam into the SCF to induce interference.
  • Measuring resonant wavelength shifts in response to transverse displacement.
  • Analyzing the impact of different bending radii on sensitivity.

Main Results:

  • A laser beam launched into the SCF created interference due to fiber-bending-induced birefringence.
  • Resonant wavelength shifted to shorter wavelengths with increasing transverse displacement.
  • Displacement sensitivity increased as the bending radius of the SCF decreased.
  • A high sensitivity of 1100 nm/mm was achieved with a 0.57 mm bending radius.

Conclusions:

  • The fabricated SCF is effective for displacement sensing applications.
  • The sensor's sensitivity is tunable by adjusting the bending radius.
  • The SCF sensor exhibits high sensitivity and potential for precise measurement.