相关实验视频
Updated: Jun 3, 2025

08:20
In Situ Soil Moisture Sensors in Undisturbed Soils
Published on: November 18, 2022
6.0K
纠正土壤湿度传感器因温度变化的方法,以提高准确度
Brenden Kelley1, Nawab Ali2, Younsuk Dong2
1Extension, Michigan State University, East Lansing, MI 48824, USA.
MethodsX
|January 13, 2025
概括
温度显著影响土壤湿度传感器的准确性. 这项研究表明,温度校正对于精确的体积含水量 (VWC) 测量至关重要,特别是在Teros-12和10-HS传感器中.
科学领域:
- 土壤科学 土壤科学
- 农业工程 农业工程
- 环境监测 环境监测
背景情况:
- 精确的土壤湿度测量对于精确的灌至关重要,但传感器性能可能会受到温度变化的影响.
- 了解传感器对温度梯度的反应对于可靠的体积含水量 (VWC) 数据至关重要.
研究的目的:
- 评估土壤湿度传感器 (Teros-12,10-HS,SoilWatch-10) 在沙土中的温度梯度 (4°C至14°C) 的性能.
- 评估温度校正的必要性和有效性,以提高传感器的准确性.
主要方法:
- 土壤湿度稳定,温度逐渐增加.
- 测量了体积含水量 (ΔVWC) 的变化,用于每个温度增加.
- 使用回归分析和统计指标 (RMSE,IA,MBE) 进行了观察 (Oθ) 和温度校正 (TCθ) VWC 的比较.
主要成果:
- Teros-12和10-HS传感器显示,随着温度的增加,DVWC的线性下降趋势,而SoilWatch-10则呈现出上升趋势.
- 10-HS传感器显示了最高的精度 (RMSE = 0.011 厘米3/厘米3),其次是Teros-12 (RMSE = 0.015 厘米3/厘米3).
- Teros-12和10-HS传感器略低估计了VWC (MBE = -0.014和 -0.011),而SoilWatch-10则高估了它 (MBE = 0.028).
结论:
- 温度校正对于提高土壤湿度传感器的准确性至关重要,最大限度地减少过度/低估.
- 10-HS传感器提供了最准确的测量,紧随其后的是Teros-12传感器.
- 所有测试的传感器都显示了观察到的和经过温度校正的VWC之间的强烈一致 (IA = 0.99),这表明它们在进行校正时的可靠性.
相关概念视频
Distance Corrections
25
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...
25
Common Leveling Mistakes and Errors
59
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...
59
Errors in Global Positioning System
35
Global Positioning System (GPS) technology has revolutionized navigation and positioning, but its accuracy is often compromised by various errors. These errors, stemming from environmental, satellite, and receiver-related factors, require careful mitigation to ensure reliable performance across applications.Atmospheric ErrorsGPS signals travel through the Earth’s ionosphere and troposphere, introducing delays which affect accuracy. The ionosphere is strongly influenced by charged particles,...
35
Responses to Heat and Cold Stress
13.3K
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
13.3K
Temperature Measurement Sites
1.5K
A thermometer measures body temperature. The common sites for measuring body temperature are the oral cavity, axillary region, temporal artery, and skin surface, such as the forehead, abdomen, and axilla. True core body temperature is assessed in the rectum, tympanic membrane, pulmonary artery, esophagus, and urinary bladder.
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...
1.5K
Errors and Mistakes in Surveying
50
Errors and mistakes in surveying refer to inaccuracies in measurements and data recording. The errors are deviations from the actual value caused by human sensory limitations, equipment flaws, or environmental effects. These errors are typically unintentional and can result from the inherent imperfections in the instruments used, atmospheric conditions, or the observer’s inability to perceive exact measurements. On the other hand, mistakes are caused by the surveyor's lack of...
50

