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Related Concept Videos

Distance Measurements by Taping01:18

Distance Measurements by Taping

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Tapes are essential in surveying for accurate, durable, and short-distance measurements. Made from lightweight, nylon-coated steel, they offer flexibility and strength for rugged outdoor use. The nylon coating protects against rust and wear, extending the tape's life. Standard lengths, around 30 meters, are marked in meters and millimeters for precision.Surveyors select tapes based on site conditions and accuracy needs. Lightweight, nylon-coated tapes are commonly used for ease of handling and...
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Electronic Distance Measuring Instruments01:30

Electronic Distance Measuring Instruments

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Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over...
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Types of Global Positioning System Surveys01:30

Types of Global Positioning System Surveys

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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...
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Distance Corrections01:15

Distance Corrections

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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...
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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

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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...
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Related Experiment Video

Updated: Dec 3, 2025

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Calibration method of three-dimensional plane array laser radar based on space-time transformation.

Shuo Zhang, Lipeng Sun, Yongran Chen

    Applied Optics
    |October 26, 2020
    PubMed
    Summary

    Accurate calibration of 3D laser radar (Light Detection and Ranging) is crucial. This study introduces a novel method fixing target-sensor position, using space-time transform for precise distance simulation, achieving high accuracy and efficiency.

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    Area of Science:

    • Metrology
    • Optical Engineering
    • Remote Sensing

    Background:

    • Accurate calibration is vital for 3D laser radar performance in target detection and optical imaging.
    • Traditional calibration methods suffer from environmental constraints, complexity, and reduced accuracy.
    • Existing techniques necessitate improvements for practical, efficient, and precise laser radar calibration.

    Purpose of the Study:

    • To develop a novel, accurate, and efficient calibration method for 3D laser radar systems.
    • To overcome the limitations of traditional calibration techniques, including environmental demands and procedural complexity.
    • To introduce a practical calibration device and validate its performance.

    Main Methods:

    • A fixed relative position between a cooperative target and the laser radar sensor is established.
    • Space-time transform principles are employed to simulate distance measurements.
    • A delay module is utilized for synchronous distance control, integrated into a practical calibration device.

    Main Results:

    • The proposed method achieves an average absolute error of 0.0019 m and a relative error of 0.0678% within a 0.5-25 m range.
    • Experimental results demonstrate the stability and high accuracy of the calibration technique.
    • The method allows for rapid and precise calibration of plane array laser radar.

    Conclusions:

    • The developed calibration method offers a stable, accurate, and efficient solution for 3D laser radar.
    • The approach effectively addresses the shortcomings of conventional calibration procedures.
    • This technique provides a practical and reliable means for calibrating laser radar systems, enhancing their measurement capabilities.