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相关概念视频

Adjusting a Traverse01:12

Adjusting a Traverse

102
In the site survey of a four-sided traverse, internal angles are essential to ensure geometric accuracy. The survey revealed that the sum of the measured internal angles was 359 degrees and 48 minutes, which is 12 minutes less than the expected 360 degrees. This discrepancy signals an error likely arising from measurement inaccuracies during the fieldwork.To rectify this error, the adjustment process involved distributing the 12-minute shortfall equally across the four internal angles. By...
102
Design Example: Measuring Distance Between Two Points with Obstructions01:10

Design Example: Measuring Distance Between Two Points with Obstructions

119
When measuring distances in areas with physical obstructions, such as a lake in a field, surveyors must employ techniques to calculate accurate lengths without direct line measurements. One effective method is the offset technique, which allows for precise distance estimation over inaccessible stretches.In this scenario, a surveyor must measure a side of an area that crosses a lake. Since the measuring tape cannot span the lake, the surveyor begins by establishing a baseline that aligns with...
119

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相关实验视频

Updated: Sep 11, 2025

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
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基于双面光学的滚角测量方法.

Yan Guo, Jiali Ji, Yu Zhang

    Applied optics
    |August 12, 2025
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    概括
    此摘要是机器生成的。

    这项研究引入了一种新的方法,用于测量全360°范围的滚角,使用双面光学. 该技术实现了高精度,为这种具有挑战性的几何参数测量提供了可靠的解决方案.

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    Measurement of Chladni Mode Shapes with an Optical Lever Method
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    Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
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    相关实验视频

    Last Updated: Sep 11, 2025

    Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
    05:57

    Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

    Published on: April 1, 2020

    8.1K
    Measurement of Chladni Mode Shapes with an Optical Lever Method
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    Measurement of Chladni Mode Shapes with an Optical Lever Method

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    Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
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    科学领域:

    • 光学计量学 在光学计量学
    • 测量几何参数的测量方法
    • 仪器仪表工程 仪器仪表工程

    背景情况:

    • 滚角是各种应用中的关键几何参数.
    • 精确测量滚动角度,特别是超过360°,存在重大挑战.
    • 现有的方法可能缺乏全面分析所需的精度或范围.

    研究的目的:

    • 提出和验证一种用于360度滚角测量的新方法.
    • 开发一个使用双面光学 (DOW) 进行增强测量的系统.
    • 为了在大范围的滚转角度确定中实现高精度.

    主要方法:

    • 采用专门设计的双面光学 (DOW) 作为探针.
    • 使用光电探测器对两个分开的光束进行成像.
    • 通过分析两个图像的运动轨迹来确定滚动角度.

    主要成果:

    • 测量系统的精度超过±7.72弧秒.
    • 在整个360度范围实现了有效的测量.
    • 实验验证证证实了该原则的有效性.

    结论:

    • 提出的基于DOW的方法为大范围滚角测量提供了有效的解决方案.
    • 该系统提供高精度,适合苛刻的应用.
    • 这种技术推进了几何参数计量学的领域.