Measuring of Soil Moisture by Damping Ratio Using System Identification Method

Authors

  • พิธา พจมานพิมล
  • วรชาติ สุวรรณงาม
  • อนรรฆพล แสนทน
  • สมยศ เกียรติวนิชวิไล

Keywords:

soil moisture, dynamic parameters, time domain response.

Abstract

This paper proposes a new technique for measuring soil moisture by using the system identification method to formulate the transfer function. The dynamic parameters e.g. rise time and damping ratio varying by the changing in soil moisture were evaluated. In the experiment, the pulses with 1 kHz, 100 kHz and 500 kHz were fed into the soil via the metal electrode; in the proposed technique, the soil is considered as a component in second order series circuit. As results indicated, the electrical properties and system response are depended on the moisture in the soil. In addition, the damping ratio is the best parameter for approximating the prediction function of the soil moisture.

References

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Published

2020-06-22

How to Cite

[1]
พจมานพิมล พ. . ., สุวรรณงาม ว. . . ., แสนทน อ. . ., and เกียรติวนิชวิไล ส. ., “Measuring of Soil Moisture by Damping Ratio Using System Identification Method”, Eng. & Technol. Horiz., vol. 34, no. 1, pp. 17–24, Jun. 2020.

Issue

Vol. 34 No. 1 (2017): January - March

Section

Research Articles

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