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heat pulse method [2 records]

Record 1 2011-03-08

English

Subject field(s)
  • Soil Science
  • Scientific Measurements and Analyses
CONT

Error analysis of the heat pulse method for measuring soil heat capacity, diffusivity, and conductivity.

CONT

Since the low cost sensor technologies available present several limitations to their inclusion in this system, it was developed and implemented a low cost sensor, as described by Valente et al. (1997), based on the heat-pulse and capacitance methods. In the first method the maximum temperature rise measured at some distance from a line heat source can be used to determine the volumetric heat capacity and hence the water content of a porous media, such as soil. The second method relates the volumetric water content with the capacitance change of a probe, inserted in the soil, according to its dielectric properties. Simultaneous use of both methods improves sensor accuracy, gives built-in fault detection capability, and makes possible self-calibration procedures.

French

Domaine(s)
  • Science du sol
  • Mesures et analyse (Sciences)
CONT

Mesure de l'humidité du sol. On citera en particulier : - La méthode par prélèvement d'échantillons du sol [...] - La méthode neutronique (sonde à neutrons) [...]. - La méthode par choc thermique permettant d'évaluer la capacité calorifique du sol, laquelle dépend de la teneur en eau.

Spanish

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Record 2 1990-05-18

English

Subject field(s)
  • Horticulture

French

Domaine(s)
  • Horticulture
OBS

pour la mesure du courant de sève dans la tige des arbres et des plantes herbacées

OBS

Source : Agronome 1989 9 (4) p. 321.

Spanish

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