Investigating Heater Resistance Tolerance of the Heat-Pulse Sensor for Accurate Soil Moisture Measurements on Vadose Zone Soil

2021 ◽  
Author(s):  
Vinay S Palaparthy ◽  
Jobish John ◽  
Maryam Shojaei Baghini
Keyword(s):  
Soil Moisture ◽  
Vadose Zone ◽  
Heat Pulse ◽  
Pulse Sensor

A Multiprobe Heat Pulse Sensor for Soil Moisture Measurement Based on PCB Technology

2019 ◽  
Vol 68 (2) ◽  
pp. 606-613 ◽  
Author(s):  
Maria Bernadete de Morais Franca ◽  
Flavio J. O. Morais ◽  
Pedro Carvalhaes-Dias ◽  
Luis Caparroz Duarte ◽  
Jose A. Siqueira Dias
Keyword(s):  
Soil Moisture ◽  
Heat Pulse ◽  
Moisture Measurement ◽  
Pulse Sensor ◽  
Soil Moisture Measurement

Thin Film Dual Probe Heat Pulse (DPHP) Micro Heater Network for Soil Moisture Content Estimation in Smart Agriculture

2019 ◽  
Vol 166 (2) ◽  
pp. B63-B67 ◽  
Author(s):  
Almaw Ayele Aniley ◽  
Naveen Kumar S. K. ◽  
Akshaya Kumar A. ◽  
Renny Edwin Fernandez ◽  
Shekhar Bhansali
Keyword(s):  
Thin Film ◽  
Soil Moisture ◽  
Moisture Content ◽  
Soil Moisture Content ◽  
Heat Pulse ◽  
Smart Agriculture ◽  
Dual Probe

Seasonal and diurnal trends of heat pulse velocity in Douglas-fir and ponderosa pine

1986 ◽  
Vol 16 (4) ◽  
pp. 814-821 ◽  
Author(s):  
W. Lopushinsky
Keyword(s):  
Soil Moisture ◽  
Ponderosa Pine ◽  
Heat Pulse ◽  
Pulse Velocity ◽  
Early Summer ◽  
Douglas Fir ◽  
Evaporative Demand ◽  
Maximum Heat ◽  
Weather Patterns ◽  
Summer Maximum

Seasonal trends of heat pulse velocity in the trunks of 55-year-old ponderosa pine (Pinusponderosa Dougl. ex Laws.) and Douglas-fir (Pseudotsugamenziesii var. glauca (Beissn.) Franco) trees showed large yearly variations related to weather patterns. Onset of sap movement in the spring, seasonal variations, and summer declines in response to decreasing moisture were similar for Douglas-fir and ponderosa pine. When soil moisture was not limiting, rates of heat pulse velocity in both species were significantly related to air temperature, solar radiation, and vapor pressure deficit. As soil moisture decreased during the summer, rates of heat pulse velocity no longer followed evaporative demand. In both species, sap movement also occurred at night. Diurnal trends of heat pulse velocity also were similar in both species. During early summer, maximum heat pulse velocity occurred at midday; in the fall, maximum rates occurred earlier. The similarity of seasonal and diurnal trends of heat pulse velocity and responses to variation in site conditions suggest that on the site studied, transpiration behavior in ponderosa pine and Douglas-fir trees generally is similar.

A high sensitivity single-probe heat pulse soil moisture sensor based on a single npn junction transistor

2013 ◽  
Vol 96 ◽  
pp. 139-147 ◽  
Author(s):  
Pedro Carvalhaes Dias ◽  
Wellington Roque ◽  
Elnatan Chagas Ferreira ◽  
José A. Siqueira Dias
Keyword(s):  
Soil Moisture ◽  
High Sensitivity ◽  
Heat Pulse ◽  
Moisture Sensor ◽  
Soil Moisture Sensor ◽  
Single Probe ◽  
Junction Transistor
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