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相关概念视频

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

Design Example: Measuring Distance Between Two Points with Obstructions

40
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...
40
Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device01:30

Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device

37
Surveyors use Global Positioning System (GPS) technology to measure the precise location and elevation of points on Earth. In a recent survey, GPS receivers were used to determine the coordinates and elevations of two park monuments. The process involved careful mission planning, data collection, and correction to ensure accuracy. The survey began with mission planning to identify optimal satellite visibility and minimize Position Dilution of Precision (PDOP). A geodetic control point...
37
Types of Global Positioning System Surveys01:30

Types of Global Positioning System Surveys

62
GPS surveying methods vary in application, accuracy, and data collection techniques, catering to diverse surveying and mapping needs. Static GPS, kinematic GPS, and real-time kinematic (RTK) surveying are widely used. Each technique offers distinct advantages.Static GPS involves placing one receiver at a known reference point and another at the target point. It collects exact positional data by observing multiple satellite ranges over an extended period, achieving centimeter-level accuracy for...
62
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
Field Application of Global Positioning System01:28

Field Application of Global Positioning System

49
The Global Positioning System (GPS) has become an indispensable tool in fieldwork, offering unparalleled precision and efficiency for surveying, navigation, and infrastructure development. By harnessing signals from a constellation of satellites, GPS receivers determine the location of objects with remarkable speed and accuracy, often completing calculations within a second.Advantages of Modern GPS TechnologyContemporary GPS receivers are designed to meet the practical demands of field...
49
Leveling Equipment01:18

Leveling Equipment

88
As leveling involves measuring vertical distances relative to a horizontal line of sight, it requires a graduated rod, called a level rod, for vertical measurements and an instrument called a level for a horizontal sight line. A level includes a high-powered telescope with a mechanism for leveling to ensure the line of sight is horizontal when the bubble in the spirit level is centered. Leveling rods, made of wood, metal, or fiberglass, are graduated in feet or meters and commonly used in two-...
88

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基于角度和距离平行测量的多目标自动定位.

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    本研究引入了一种用于大规模制造的新型多目标定位方法,提高了使用平行角度和距离测量的3D坐标测量效率和精度.

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    科学领域:

    • 计量学和测量科学 计量学和测量科学
    • 工业制造技术 工业制造技术
    • 航空航天和海洋工程 航空航天和海洋工程

    背景情况:

    • 准确的3D坐标测量对于航空航天和造船领域的大规模组件制造至关重要.
    • 传统的计量系统在大型结构的效率和自动化方面面临着挑战.
    • 需要提高工业测量过程的精度和速度.

    研究的目的:

    • 开发和验证一个多目标自动定位方法,用于快速,平行角度和距离测量.
    • 为了提高大规模制造业3D坐标测量的效率和自动化.
    • 为了提高3D坐标测量的精度,超越传统方法.

    主要方法:

    • 脱角度和距离测量用于同时执行.
    • 使用合作目标用于旋转激光扫描角度和绝对距离测量.
    • 通过激光扫描实现多目标粗略定位,然后通过绝对距离约束进行精确的坐标测量.
    • 提出一种用于内部零长度的确定和镜像偏移在距离测量的错误补偿的方法.

    主要成果:

    • 通过现场实验证明了多目标自动定位方法的可行性.
    • 与激光追踪器相比,实现了比0.17毫米更好的3D坐标测量精度.
    • 与传统计量系统相比,经过验证提高了测量效率和自动化.

    结论:

    • 拟议的平行角度和距离测量方法显著提高了3D坐标测量的效率和自动化.
    • 开发的技术提供了高精度,适用于大型制造业的关键应用.
    • 这种方法为航空航天和造船行业的精确计量提供了可行的解决方案.