Design of Solar Soil Moisture Measuring Instrument Based on STM8 Microprocessor
The moisture content of the soil is very important for the growth of plants.Detecting soil moisture is a key in automatic irrigation system.In order to continuously measure the soil moisture content,STM8 microprocessor and FDR (frequency domain reflectometry) principle were adopted.With solar energy power supply,a portable soil moisture measuring instrument was designed and made with hardware and software.Multigroup experiment was carried by different soils.Comparative results showed that detection result of this device was relatively close to those by the drying method,with less than 3％ of enor.
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NSTL
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维普
