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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 11:51 |
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Conference: Bucharest University Faculty of Physics 2008 Meeting
Section: Electricity and Biophysics
Title:
Digital measurements of soil humidity by a resistive transducer
Authors:
Cristiana Anca Parvan
Dragos Stefan Varlan
Affiliation:
E-mail
dragos.varlan@gmail.com
Keywords:
Abstract:
The contribution consist of a new resistive transducer type
intended for humidity measurements at different ground levels.The display may be both digital and analogical.
The system may be easily adapted for computer assisted operation by adding of adequate electronic circuit.Electronical humidimeters involve specific transducers as a large class of automatic systems does.Their characteristics regarding linearity, dynamic and precision are most important in order to cope whith the theoretical hypothesis of automatic processes mathematical background.
The transducer electrical output is the input signal for the measuring electronic circuit.If the subject to be measured could offer the energy required by the measuring process, the electrical input signal is obtained by simple conversion of its characteristic, into an electrical signal. If this is not the case, an exterior signal is requested (activation signal).
The electronic circuit delivers an electrical output signal whitch proportionally follows the variations of the imput signal. The output may be measured, displayed directly, recorded for future reference or the whole circuit may be interconected in a complex automatic system and electronically computed.
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