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Related Concept Videos

Gyroscope01:02

Gyroscope

A gyroscope is defined as a spinning disk in which the axis of rotation is free to assume any orientation. When spinning, the orientation of the spin axis is unaffected by the orientation of the body that encloses it. The body or vehicle enclosing the gyroscope can be moved from place to place, while the orientation of the spin axis remains the same. This makes gyroscopes very useful in navigation, especially where magnetic compasses cannot be used, such as in crewed and crewless spacecraft,...
Gyroscope: Precession01:24

Gyroscope: Precession

Precession can be demonstrated effectively through a spinning top. If a spinning top is placed on a flat surface near the surface of the Earth at a vertical angle and is not spinning, it will fall over due to the force of gravity producing a torque acting on its center of mass. However, if the top is spinning on its axis, it precesses about the vertical direction, rather than topple over due to this torque. Precessional motion is a combination of a steady circular motion of the axis and the...
Galvanometer01:24

Galvanometer

Common devices, including car instrument panels, battery chargers, and inexpensive electrical instruments, measure potential difference (voltage), current, or resistance using a d'Arsonval galvanometer. This electromechanical instrument is also known as a moving coil galvanometer.
The galvanometer consists of  two concave-shaped permanent magnets, providing a uniform radial magnetic field in the annular region. In the center, a pivoted coil of fine copper wire is placed in the uniform magnetic...
Measuring Acceleration Due to Gravity01:12

Measuring Acceleration Due to Gravity

Consider a coffee mug hanging on a hook in a pantry. If the mug gets knocked, it oscillates back and forth like a pendulum until the oscillations die out.
A simple pendulum can be described as a point mass and a string. Meanwhile, a physical pendulum is any object whose oscillations are similar to a simple pendulum, but cannot be modeled as a point mass on a string because its mass is distributed over a larger area. The behavior of a physical pendulum can be modeled using the principles of...

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Related Experiment Video

Updated: Jun 8, 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

Automatic north sensor using a fiber-optic gyroscope.

T Tanaka, Y Igarashi, M Nara

    Applied Optics
    |September 24, 2010
    PubMed
    Summary

    Fully automatic, computer-controlled north sensors utilizing all-fiber gyroscopes achieve high accuracy. These advanced fiber optic gyroscopes can detect north direction with a precision of 0.056°, even amidst mechanical noise.

    Area of Science:

    • Optoelectronics
    • Navigation Systems
    • Sensor Technology

    Background:

    • Accurate determination of north direction is crucial for various applications, including surveying, navigation, and scientific research.
    • Traditional north-seeking methods can be limited by environmental factors and technological constraints.

    Purpose of the Study:

    • To develop and evaluate computer-controlled, fully automatic north sensors based on all-fiber gyroscopes.
    • To investigate the measurement accuracy achievable with these sensors and the impact of mechanical noise.

    Main Methods:

    • Development of a computer-controlled, fully automatic north sensor system.
    • Utilization of an all-fiber gyroscope with a specific scale factor (5.4 s).
    • Employment of a 1665-m polarization-maintaining fiber for enhanced signal stability.

    More Related Videos

    A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
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    A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

    Published on: January 7, 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

    Related Experiment Videos

    Last Updated: Jun 8, 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

    A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
    09:03

    A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

    Published on: January 7, 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:

    • The developed north sensor achieved a high measurement accuracy of 0.056° for detecting the north direction.
    • The study investigated the influence of surrounding mechanical noises on the sensor's performance and achievable accuracy.

    Conclusions:

    • Computer-controlled, fully automatic north sensors using all-fiber gyroscopes offer a highly accurate solution for north direction determination.
    • The system demonstrates robustness and potential for applications requiring precise directional referencing, with further analysis on noise mitigation being valuable.