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相关概念视频

Distance Corrections01:15

Distance Corrections

28
To achieve precise distance measurements, especially in surveying and construction, certain corrections must be applied to account for potential sources of error like the standardization errors, temperature variations, and slope adjustments.Standardization error emerges when measurement equipment undergoes changes, such as wear, repairs, or weather impacts. To address this, surveyors compare the equipment’s readings to a standard. This process identifies any deviation that might lead to...
28
Common Leveling Mistakes and Errors01:17

Common Leveling Mistakes and Errors

75
A survey team is tasked with determining the elevation difference between points Point A and Point B, separated by uneven terrain. They use a leveling instrument and a leveling rod.Common MistakesMisreading the Rod: During a backsight reading at Point A, the instrumentman observes the rod partially obscured by tall grass. Instead of reading 1.135 m, they mistakenly record 1.735 m due to the misalignment of the crosshair with the wrong graduation. This error adds 0.600 m to all subsequent...
75
Adjusting a Traverse01:12

Adjusting a Traverse

59
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...
59

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相关实验视频

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High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques
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阶段辅助在线自我校正方法,用于高精度的三维测量.

Xiaojie Zhang, Ziwei Wang, Zewei Cai

    Optics express
    |February 1, 2024
    PubMed
    概括

    本研究介绍了双筒结构光3D测量系统的在线自我校正方法. 这种新的方法即使在不稳定的结构中也确保了高精度,提高了工业检查可靠性.

    科学领域:

    • 计量学和测量科学 计量学和测量科学
    • 光学工程是指光学工程.
    • 计算机视觉 计算机视觉

    背景情况:

    • 双筒结构光3D测量系统对于工业检查至关重要,但由于机械或环境因素而存在不稳定性.
    • 传统的方法难以自我纠正结构变化,影响在线测量准确度.
    • 保持系统完整性对于可靠的现场形状测量至关重要.

    研究的目的:

    • 为双筒结构光3D测量系统开发在线自我校正方法.
    • 为应对工业检查和形状测量的结构不稳定的挑战.
    • 在动态环境中提高3D测量的准确性和可靠性.

    主要方法:

    • 提出了一种在线自我校正方法,利用直角边缘投影.
    • 从直角边缘投射中利用双向阶段来放松极几何约束.
    • 实施了阶段解封策略,以减少投影模式和提高效率.

    主要成果:

    • 提出的方法有效地纠正不稳定的系统结构的在线自我纠正.
    • 即使在复杂和乱的环境条件下,也可以实现高精度的3D测量.
    • 证明了直角边缘投影技术对动态测量的稳定性.

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    结论:

    • 开发的方法为不稳定的3D测量系统的在线自我校正提供了有效的解决方案.
    • 正角边缘投影在克服结构变化以获得准确的3D测量方面具有优势.
    • 该技术增强了双筒结构光系统在具有挑战性的工业环境中的应用性.