基于DEM数据的无人机放射性测量的高度和地形校正
Zhipeng Deng1, Liangquan Ge1, Long Wen1
1College of Nuclear Technology and Automation Engineering, Chengdu University of Technology, Chengdu, 610059, Sichuan, China.
Journal of environmental radioactivity
|March 16, 2025
概括
无人驾驶飞行器 (UAV) 马光谱仪提供了有效的地面放射测量调查. 高度和地形调整提高了无人机数据准确度,以提高地面剂量率,特别是在复杂的环境中.
科学领域:
- 地质物理学 地质物理学
- 环境科学 环境科学
- 辐射测量测量 辐射测量测量
背景情况:
- 对于环境监测和资源勘探而言,陆地放射测量调查至关重要.
- 传统的地面方法在大规模和复杂的地形地区面临挑战.
- 无人机 (UAV) 马光谱测量为克服这些局限性提供了一个潜在的解决方案.
研究的目的:
- 研究无人机马光谱仪在地面放射测量调查中的应用.
- 评估无人机飞行高度和崎地形对测量准确性的影响.
- 开发和验证一种基于高度和地形的无人机辐射测量数据校正方法.
主要方法:
- 现场实验是在使用无人机马光谱仪在稀土矿床上进行的.
- 从509个无人机调查点和585个地面测量点收集了放射性数据.
- 建立了一个物理模型,结合数字高度模型 (DEM) 来进行高度和地形校正.
主要成果:
- 开发了一个物理模型,使用无人机测量地面放射性.
- 证明高度和地形校正方法有效地利用无人机数据来指示地面空气吸收剂量率.
- 随着校正范围的扩大,无人机测量数据的准确性得到了提高,特别是在复杂的地形上.
结论:
- 无人机马光谱仪是放射测量调查的有效技术.
- 开发的高度和地形校正方法提高了无人机放射测量数据的可靠性.
- 这项研究提供了一种有价值的新方法,用于在大规模和具有挑战性的地形上进行放射测量调查,适用于环境监测,资源勘探和核安全.
相关概念视频
01:26Influence of Earth's Curvature and Atmospheric Refraction on Leveling
47
During leveling, the Earth's curvature and atmospheric refraction introduce deviations in the line of sight from a true horizontal reference. When the line of sight is leveled, it remains perpendicular to the plumb line only at a single point. Beyond this, it deviates due to the Earth’s curvature, represented by the correction C. For a sight distance D, the deviation can be derived using the relationship:This relationship shows that the deviation increases quadratically with distance.
47
01:15Distance Corrections
24
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...
24
01:30Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device
18
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...
18
01:17Common Leveling Mistakes and Errors
58
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...
58
01:25Methods of Obtaining Topography
40
Topography involves measuring and mapping land elevations, natural features, and artificial structures to create accurate representations of the terrain. Topographic surveying relies on traditional and modern methods, each with distinct advantages and limitations.Traditional Surveying Methods:Transit stadia surveys and plane table surveys were widely used traditional surveying methods. These techniques relied on instruments like theodolites and stadia rods for measuring distances and angles,...
40
01:12Differential Leveling
112
Differential leveling is a precise method in surveying used to determine the elevation difference between two points. Its primary goal is to establish accurate vertical measurements to create level surfaces or grade lines critical for designing and constructing infrastructures such as roads, bridges, and buildings.The procedure for differential leveling begins with setting up and leveling the instrument at a point where the benchmark can be seen. The level rod is held on the benchmark (BM), and...
112