Nanoceramic NiMn2O4 Powder-Based Resistance Thermometer for Soil Temperature Measurement Application in Agriculture

2018 ◽  
Vol 88 (1) ◽  
pp. 455-470
Author(s):  
S. K. Naveen Kumar ◽  
Almaw Ayele Aniley ◽  
A Akshaya Kumar ◽  
Renny Edwin Fernandez ◽  
Shekhar Bhansali
Keyword(s):  
Soil Temperature ◽  
Temperature Measurement ◽  
Resistance Thermometer

scholarly journals Development of Shallow-Depth Soil Temperature Estimation Model Based on Thermal Response in Permafrost Area

2018 ◽  
Vol 8 (10) ◽  
pp. 1886 ◽  
Author(s):  
Keunbo Park ◽  
Heekwon Yang ◽  
Bang Lee ◽  
Dongwook Kim
Keyword(s):  
Soil Temperature ◽  
Temperature Measurement ◽  
Thermal Response ◽  
Estimation Model ◽  
Temperature Estimation ◽  
Soil Temperatures ◽  
Different Depths ◽  
The Relationship ◽  
Temperature Depth ◽  
Good Agreement

A soil temperature estimation model for increasing depth in a permafrost area in Alaska near the Bering Sea is proposed based on a thermal response concept. Thermal response is a measure of the internal physical heat transfer of soil due to transferred heat into the soil. Soil temperature data at different depths from late spring to the early autumn period at multiple permafrost sites were collected using automatic sensor measurements. From the analysis results, a model was established based on the relationship between the normalized cumulative soil temperatures (CRCST*i,m and CST*ud,m) of two different depths. CST*ud,m is the parameter of the soil temperature measurement at a depth of 5 cm, and CRCST*i,m is the parameter of the soil temperature measured at deeper depths of i cm (i = 10, 15, 20, and 30). Additionally, the fitting parameters of the mathematical models of the CRCST*i,m–CST*ud,m relationship were determined. The measured soil temperature depth profiles at a different site were compared with their predicted soil temperatures using the developed model for the model validation purpose. Consequently, the predicted soil temperatures at different soil depths using the soil temperature measurement of the uppermost depth (5 cm) were in good agreement with the measured results.

scholarly journals Semi-stationary measurement as a tool to refine understanding of the soil temperature spatial variability

2015 ◽  
Vol 29 (4) ◽  
pp. 449-457 ◽  
Author(s):  
Michal Lehnert ◽  
Miroslav Vysoudil ◽  
Petr Kladivo
Keyword(s):  
Spatial Variability ◽  
Soil Temperature ◽  
Temperature Measurement ◽  
Computer Technology ◽  
Spatial Data ◽  
Local Level ◽  
Limited Area ◽  
Using Data ◽  
Further Development ◽  
Stationary Measurement

AbstractUsing data obtained by soil temperature measurement at stations in the Metropolitan Station Network in Olomouc, extensive semi-stationary measurement was implemented to study the spatial variability of the soil temperature. With the development of the research and computer technology, the study of the temperature is not limited by the complexity of the processes determining the soil temperature, but by the lack of spatial data. This study presents simple semi-stationary soil temperature measurement methods, which can contribute to the study of the spatial variability of soil temperature. By semi-stationary measurement, it is possible to determine the average soil temperature with high accuracy and the minimum soil temperature with sufficient accuracy at a depth of 20 cm. It was proven that the spatial variability of the minimum soil temperature under grass at a depth of 20 cm can reach up to several degrees Celsius at the regional level, more than 1°C at the local level, and tenths of °C at the sublocal level. Consequently, the standard stationary measurement of the soil temperature can be regarded as representative only for a very limited area. Semi-stationary soil temperature measurement is, therefore, an important tool for further development of soil temperature research.

scholarly journals EFFECTS OF VARIATION IN MEASUREMENT CHAIN ON TEMPERATURE MEASUREMENT CALIBRATION WITH RESISTANT TEMPERATURE SENSORS

2019 ◽  
Vol 19 (3) ◽  
pp. 57-66
Author(s):  
Jessica DEUTSCH ◽  
Mirko RIEDEL ◽  
Jens MÜLLER ◽  
Steffen IHLENFELDT
Keyword(s):  
Temperature Measurement ◽  
Temperature Sensors ◽  
Platinum Resistance Thermometer ◽  
Platinum Resistance ◽  
Temperature Calibration ◽  
Resistance Thermometer ◽  
Temperature Calibrator ◽  
Industrial Platinum Resistance Thermometer ◽  
Set Up ◽  
Key Parameter

Temperature is one of the most important key parameter to consider in measurement and mechanical engineering, because every measurement has to be conducted with reference to standard temperature conditions (20 °C, ISO 1). Strictly speaking, almost every measurement depends on the accuracy of the temperature measurement, which requires proper calibration. Therefore, standards list detailed criteria to fulfil temperature calibration with high precision. In fact, any calibration is only valid, if the whole measurement chain is taken into account. This would make recalibration necessary with each variation of the components in the measuring set-up (varying cable length, different measurement channel etc.), which is time-consuming or even impossible in practice. For that reason, this paper presents a practicable calibration strategy, which specifies each component individually and later combines the calibration results according to the composition of the measurement chain. This provides a fast and useful way to achieve the required accuracy of temperature measurement. The examined, exemplary measurement chain consists of an industrial platinum resistance thermometer (IPRT), cables with different lengths, an electrical amplifier and a reference temperature calibrator.

COMPARISON OF SOIL TEMPERATURE MEASUREMENT BY CONE PENETRATION TESTING AND BOREHOLE THERMOMETRY

2018 ◽  
Vol 12 (7-8) ◽  
pp. 16-24
Author(s):  
N. G. . VOLKOV ◽  
I. S. SOKOLOV
Keyword(s):  
Soil Temperature ◽  
Temperature Measurement ◽  
Frozen Soil ◽  
Necessary Condition ◽  
Natural Soil ◽  
Cone Penetration ◽  
Monitoring Method ◽  
Penetration Testing ◽  
Cone Penetration Testing ◽  
True Value

Development of infrastructure located in cryolithozone requires the use of modern geotechnical technologies for frozen soil investigation. Accurate soil temperature measurement is the necessary condition for engineering-geocryological survey and geotechnical monitoring. In the article a new method is considered on how to measure soil temperature by cone penetration testing (CPT). The cone temperature stabilization is described in detail, including the existing criteria of thermal stabilization of a cone. The results of temperature measurements are presented for both frozen and non-frozen soils and obtained by CPT (cone with a temperature sensor) and using borehole thermometry (thermistor string), which measured in both holes drilled by a rig and left after the cone penetration testing completion. Detailed analysis of accuracy of soil temperature measurement is also provided. The comparison of the obtained results is performed and the discrepancy of the measured soil temperature in absolute values is estimated. As a result of the analysis, it was shown that all the soil temperature values measured by different methods are sufficiently close to each other and the true value of the natural soil temperature are all located in the zone of intersection of the confidence intervals of each temperature measurement, performed at corresponding depths by different methods. All obtained temperature values do not cross the accuracy limits of temperature sensors, used both in cone penetration testing and borehole thermometry. High accuracy of temperature measurement by CPT is proved and feasibility of CPT application for soil temperature measurement is justified as an express-monitoring method.

STUDI DIFUSIVITAS TERMAL PADA MEDIUM TANAH MELALUI PENGUKURAN SUHU

2008 ◽  
Vol 5 (2) ◽  
Author(s):  
Aries Astradhani Subgan
Keyword(s):  
Heat Transfer ◽  
Soil Temperature ◽  
Temperature Measurement ◽  
Thermal Diffusion ◽  
Pattern Change ◽  
Significant Difference ◽  
Covering Condition

<p>This study is aimed to analyze the thermal diffusion in medium soil through temperature measurement.  The data of medium soil temperature provide information about the phenomenon of heat transfer at medium soil.  This research will also look for significant differences of thermal diffusion at medium soil in two condition of different covering; it is also seeing by the different soil temperature and pattern change of soil temperature.  The equality two mean tests method (two party tests) was used to see the significance of thermal diffusion. There are significant differences of soil temperature according to covering condition and deepness tested by ANOVA (Varian analysis) in two directions. At the same time there is significance difference about pattern change of soil temperature from time to time according to the covering condition to the deepness used by analysis of fouries. The finilings show that there were significant differences at medium soil for coat of        z (4-6) with condition of difference in covering. Significant difference was also shown by soil temperature according to the condition of covering and deepness.</p>

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