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相关概念视频

Gyroscope: Precession01:24

Gyroscope: Precession

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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...
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Gyroscope01:02

Gyroscope

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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,...
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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...
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相关实验视频

Updated: Jan 17, 2026

Wideband Optical Detector of Ultrasound for Medical Imaging Applications
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宽带源驱动的共振集成光学陀螺仪使用低调制频率.

Ying Wang, Liu Yang, Chenlong Xu

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    此摘要是机器生成的。

    这项研究介绍了一种新的共振集成光学陀螺仪 (RIOG) 设计,该设计使用低调制频率. 这种创新方法实现了高精度,减少了小型惯性设备中信号处理系统面临的挑战.

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    科学领域:

    • 光学和光学工程的光学和光学工程.
    • 惯性传感技术 惯性传感技术
    • 微光学和微腔装置的微光学和微腔装置.

    背景情况:

    • 响应集成光学陀螺仪 (RIOGs) 是高精度,小型化的惯性装置的关键.
    • 传统的RIOG需要高调制频率 (MHz范围) 来抑制噪声,使信号处理复杂化.
    • 宽带来源提供了改善RIOG性能的潜力.

    研究的目的:

    • 提出并实验验证一个使用低调频率的宽带源驱动RIOG方案.
    • 克服传统RIOG中高频调制的局限性.
    • 为了提高微型,高精度光学陀螺仪的实用性.

    主要方法:

    • 实施了一个带宽源驱动的RIOG方案,具有低调制频率 (300 kHz).
    • 使用光学取消方法来抑制噪音.
    • 采用低语画廊模式微腔 (WGMR) 支持多种模式 (一个FSR中的七种模式).

    主要成果:

    • 实现了0.17°/√h的角度随机步行 (ARW).
    • 与传统方案相比,表现出6dB的性能改善.
    • 成功降低调制频率要求,同时保持高测量精度.

    结论:

    • 拟议的RIOG方案有效地减少了调制频率要求.
    • 这种方法为小型化,高精度光学陀螺仪的实际工程应用提供了创新的解决方案.
    • 该方法为克服光学陀螺仪中传统信号处理挑战提供了一条途径.