DEVELOPMENT AND TESTING OF A CAPACITIVE DIGITAL SOIL MOISTURE METRE
| Autor: | E. L. Ndulue, V. Ogwo, K. N. Ogbu, C.C. Mbajiorgu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
0209 industrial biotechnology Soil test Capacitive sensing Soil science 02 engineering and technology Soil moisture content Metre Capacitance sensor Microcontroller Dielectric 01 natural sciences 020901 industrial engineering & automation Linear relationship agricultural engineering Linear regression Calibration Metre Environmental science measurement and instrumentation Soil moisture content Water content 010606 plant biology & botany Remote sensing |
| Zdroj: | Nigerian Journal of Technology; Vol 35, No 3 (2016); 686-693 |
| ISSN: | 0331-8443 2467-8821 |
| Popis: | This paper presents a low cost, simple digital soil moisture meter, working on the principle of dielectric. A digital soil moisture meter using the NE555 timer and micro controller as a major electronic component was developed and tested, which display its output in a range of 0.0 to 99% on the 7-segment displayed unit. The digital soil moisture meter developed was compared with gravimetric method for soil moisture determination on fifteen soil samples added different level of water during calibration process. The results revealed a relatively linear relationship between the moisture content process and the digital soil moisture meter. The regression coefficient (R 2 ) of the digital soil moisture meter calibration was 0.984. Twenty soil samples were used in validation of the calibrated digital soil moisture meter. The regression coefficient (R 2 ) was found to be 0.964, showing validity of the developed digital soil moisture meter. The developed meter provided up to 96% accuracy in estimating the value of the soil moisture content. The results showed that the developed digital soil moisture meter is more reliable, sensitive, precise and easy to use. http://dx.doi.org/10.4314/njt.v35i3.30 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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