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Adjusting a Traverse01:12

Adjusting a Traverse

66
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...
66
Design Example: Measuring Distance Between Two Points with Obstructions01:10

Design Example: Measuring Distance Between Two Points with Obstructions

44
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...
44
Beams with Unsymmetric Loadings01:17

Beams with Unsymmetric Loadings

123
Analyzing a supported beam under unsymmetrical loadings is essential in structural engineering to understand how beams respond to varied force distributions. This analysis involves calculating the deflection and identifying points where the slope of the beam is zero, which are crucial for ensuring structural stability and functionality.
The first moment-area theorem determines the slope at any point on the beam. This theorem indicates that the change in slope between two points on a beam...
123

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相关实验视频

Updated: Jul 12, 2025

Measurement of Dynamic Scapular Kinematics Using an Acromion Marker Cluster to Minimize Skin Movement Artifact
10:07

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基于影像成像的三角化方法用于工具偏移测量.

Marina Terlau1, Axel von Freyberg1, Dirk Stöbener1,2

  • 1University of Bremen, Bremen Institute for Metrology, Automation and Quality Science, Linzer Straße 13, D-28359 Bremen, Germany.

Sensors (Basel, Switzerland)
|October 28, 2023
PubMed
概括

一个多传感器系统准确地测量了在增量成型中的工具尖端位置,实现了50μm以下的不确定性. 这个系统可以补偿系统偏差,从而能够精确控制成型板的几何偏差.

关键词:
增量表格成型 增加表格成型影子成像技术 影子成像技术三维位置测量三维位置测量三角测量就是三角测量.

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Characterization of Surface Modifications by White Light Interferometry: Applications in Ion Sputtering, Laser Ablation, and Tribology Experiments
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相关实验视频

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科学领域:

  • 制造业 工程 制造工程
  • 计量学 计量学 计量学
  • 机器人技术 机器人技术 机器人技术

背景情况:

  • 增量成型 (IF) 工艺往往会导致由于工具偏移而导致几何偏差.
  • 准确的过程中测量成型工具的尖端位置对于控制这些偏差至关重要.

研究的目的:

  • 开发和验证一个多传感器系统,用于在工艺过程中精确测量工具尖位置的IF.
  • 在大型工作体积 (2.0 m × 1.0 m × 0.2 m) 上实现低于50μm的测量不确定性.

主要方法:

  • 设计了一个利用三角化原理的多传感器系统.
  • 每个传感器都确定了工具上的发光二极管 (LED) 的方向向量.
  • 通过将两个传感器的数据结合起来来计算LED的3D位置.

主要成果:

  • 该系统成功地在指定的体积和不确定性范围内测量了工具尖位置.
  • 传感器视角被确定为范围和不确定性的限制因素.
  • 系统性偏差被确定并补偿,满足所需的测量不确定性.

结论:

  • 开发的多传感器系统有效地解决了IF中在工艺过程中测量工具尖端位置的需求.
  • 对系统偏差的补偿策略是实现高精度的关键.
  • 该系统可以更好地控制增量形成的部件中的几何偏差.