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相关概念视频

Adjusting a Traverse01:12

Adjusting a Traverse

37
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...
37
Common Leveling Mistakes and Errors01:17

Common Leveling Mistakes and Errors

50
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...
50
NMR Spectrometers: Resolution and Error Correction01:14

NMR Spectrometers: Resolution and Error Correction

596
When magnetic nuclei in a sample achieve resonance and undergo relaxation, the signal detected in NMR is an approximately exponential free induction decay. Fourier transform of an exponential decay yields a Lorentzian peak in the frequency domain. Lorentzian peaks in an NMR spectrum are defined by their amplitude, full width at half maximum, and position, where the peak width is governed by the spin-spin relaxation time alone. In real experiments, however, the applied magnetic field is rendered...
596
Distance Corrections01:15

Distance 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

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相关实验视频

Updated: May 14, 2025

Magnetic Tweezers for the Measurement of Twist and Torque
11:41

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一种用于三轴磁力仪交叉阵列及其有效性验证的无损标量校准算法.

Lihua Wu1, Yu Huang1,2, Xintong Chen1

  • 1College of Physics and Optoelectronic Engineering, Harbin Engineering University, Harbin 150001, China.

Sensors (Basel, Switzerland)
|April 12, 2025
PubMed
概括

这项研究引入了一种新的无损标量校准算法,以提高三轴磁力计交叉阵列 (TAMCAs) 的磁梯度张量 (MGT) 测量的准确性. 该方法有效减少错误,改善地磁强度和MGT数据质量.

关键词:
有效性验证的有效性验证这是一个错误的错误错误.没有损失的标量级校准.磁梯度张力器磁梯度张力器三轴磁力计交叉阵列的三轴磁力计.

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科学领域:

  • 地质物理学 地质物理学
  • 传感器技术 传感器技术
  • 数据校准 数据校准

背景情况:

  • 使用三轴磁力仪交叉阵列 (TAMCAs) 进行磁梯度张量 (MGT) 测量对于地球物理调查至关重要.
  • 单个三轴磁计 (TAM) 和传感器失调角度 (MAs) 中固有的错误显著降低了MGT数据质量和测量准确性.
  • 现有的校准方法通常涉及近似或努力考虑参考磁强度 (MI) 的实时波动.

研究的目的:

  • 开发和验证TAMCA的新型无损标量校准算法.
  • 为了在校准过程中消除数学近似,并跟踪参考磁强度波动.
  • 提高从TAMCA获得的MGT的整体测量精度和数据质量.

主要方法:

  • 开发了一个无损的标量校准算法,专注于消除近似和跟踪参考磁强度 (MI) 波动.
  • 使用受约束的欧勒定位的验证实验旨在证明算法的有效性.
  • 数值分析调查了TAM噪声水平 (标准偏差),校准数据集大小和参考MI波动 (STD) 对校准准确性的影响.

主要成果:

  • 提出的无损标量校准算法显著提高了校准地点地磁强度 (geo-MI) 的测量精度.
  • 该算法还提高了对充电线圈的磁梯度张量 (MGT) 测量的准确性.
  • 使用四个流门TAM (FTAM) 的实验验证证证了算法在减少测量误差方面的有效性.

结论:

  • 开发的无损标量校准算法在改善TAMCA的MGT测量的准确性方面取得了重大进展.
  • 该方法有效地解决了固有的传感器错误和错位问题,从而获得更高质量的地质物理数据.
  • 这种方法为各种应用中准确的磁场测量提供了强大的解决方案.