12 parameter agrometeorological station
GREEN One is an innovative low cost monitoring solution proposed by 3a S.r.l. for the agriculture sector.
The heart of the system is an integrated sensor, housed inside the solar screen, capable of directly measuring Air Temperature, Relative Humidity and Atmospheric Pressure. In addition, 3 integrated inputs allow for the acquisition of data from 3 external sensors: Precipitation, Wind Direction and Wind Speed. The integrated micro-controller’s processing capabilities also allows for the development of specific functions on board the sensor which, starting with the sensor acquisitions, provide 6 derived measurements in output mode: Global Radiation, Net Radiation, Dew Temperature, Wet Bulb Temperature, Leaf Wetness and Potential Evapo-transpiration.
Data calibration and other requirements for the acquisition of measurements (linearization, temperature compensation, etc.) are memorized in the on board electronics. The station’s firmware implements raw data validation procedures and statistical processing of measurements at different time scales.
The system is powered by a 12V / 18 Ah battery that is recharged by a 10 W photovoltaic panel.
Innovation:
- Reduction in costs linked to sensors
- Implementation of advanced agro-meteorological algorithms
- Possibility of installing outdoor analogue sensors of different manufacturers
- Interfacing with the GPMeteo agro-meteorological monitoring system
The station is equipped with a GPRS modem capable of sending data at a configurable transmission interval. The GPMeteo web interface creates a control station for measurements, managing alarms, integrating mathematical agro-meteorological and environmental models. The user queries and processes the data via internet using high performance, high speed spreadsheets, with results that are analogous to client systems.
Technical specifications for the Temperature-Humidity-Pressure integrated sensor:
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TECHNICAL SPECIFICATIONS FOR THE TEMPERATURE-HUMIDITY-PRESSURE INTEGRATED SENSOR: |
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Measurement |
Resolution |
Accuracy |
Repeatability |
Operating Range |
Long-term Drift |
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Temperature |
0.01°C |
±0.3°C |
±0.1 °C |
-40÷+120 °C |
<0.04°C/year |
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Rel. Humidity |
0.05% RH |
± 2% RH |
±0.1% RH hysteresis ±1% RH nonlinear <1% RH |
0÷100% RH |
<0.5% RH/year |
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Atmospheric pressure |
0.1 mBar |
±0.5 mBar (p=750÷1100 mBar e Temp=25°C) |
Temperature relative error ±1 mBar (p=300÷1000 mBar e Temp=0..50°C) -2,+5 mBar (p=300÷1000 mBar e Temp=-40 ÷ +85°C) |
10÷1100 mBar |
1 mBar/year |
Technical specifications:
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PRECIPITATION GAUGE |
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Dimension |
Resolution |
Accuracy |
Operating Range |
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Diameter:16.5 cm Area di raccolta: 214 cm² |
0.2 mm |
±4% (0÷50 mm/h) ±5% (50÷100 mm/h) |
0÷999.8 mm |
The anemometer comprises a Robinson reel with three digital–magnetic actuator cups.
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ANEMOMETER |
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Resolution |
Accuracy |
Operating Range |
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0.1 m/s |
±1 m/s (0÷5 m/s); ±10% (>5 m/s); |
0÷50 m/s |
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The wind direction sensor features a 16 point potentiometric wind vane.
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WIND DIRECTION |
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Resolution |
Accuracy |
Operating Range |
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22.5° |
±7% |
0÷360° |
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Final measurements are processed by the GREEN One station(Daily/Hourly/10min):
- Air Temperature (med, max, min)
- Air Humidity (med, max, min)
- Air Pressure (med, max, min)
- Wind Speed (med, max)
- Wind Direction (med)
- Precipitation Gauge (cumulation, rain rate)
- Global Radiation (integral)
- Net Radiation (integral)
- Potential Evapo-transpiration (cumulation)
- Leaf Wetness (cumulation)
- Dew Temperature (med, max, min)
- Wet Bulb Temperature (med, max, min)
