Environmental IoT Applications & Agriculture: Low-Cost ...€¦ · Technical Univ. of Crete,...
Transcript of Environmental IoT Applications & Agriculture: Low-Cost ...€¦ · Technical Univ. of Crete,...
Environmental IoT Applications & Agriculture: Low-Cost, Batteryless
Scatter Radio Sensors
Associate Prof. Aggelos Bletsas"[email protected]"
School of Electrical & Computer Engineering (ECE)
Technical Univ. of Crete, Chania, Greece
2nd Naftemporiki Technology
Conference, Internet of Things – Evolution in Action,
Divani Caravel, Athens " Dec. 8, 2016"
Problem: Networking all plants in a green-house/garden/field!"Why?"Ø Water saving: precise irrigation
(80% of water potential => agriculture)"
Ø Dense measurements => 30% water savings"
Ø Plant health monitoring: precision agriculture."
“No-glue-technology” Challenge:"Ø Reduce cost (in $$$ and Joules) of wireless networking:
from 75$-400$ => less than 1-5$/wireless sensor!"
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State-of-the-Art (2013) Commercial (French/Dutch) Technology..."
§ Humidity, temperature and sunlight to mobile (Bluetooth)."§ Problem: too expensive (what if 10000 plants?)!!!"
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Approach: Backscatter (Reflection/RADAR) Radio"
Ø Conventional Radio Transmitter:
filters, mixers, amplifiers…"
Ø ~20mA (60mW), 100m – 1km
range."
Ø Backscatter/RFID Radio:
just 1 (transistor) switch!"
Ø …less than 0.6mA, “smaller”
range."
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TUC/Bletsas Group Scatter Sensor Networks Research Outcome:"
Ø Range: 150+ m outdoors."
Ø Cost: 3-10€/wireless sensor
in quantities of 1."
Ø Power: Battery-less."
Ø Network Size: 100+"5/8
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Example 1: Soil Moisture/Environmental Humidity Sensing"
Ø Principle: convert capacitor changes to backscattered freq!"
Ø Cost ~5€ (quantity of 1), Power ~100μWatt, RMS 1.9% SM. !Ø Simple Networking (FDMA)."
Example 2: Plant = Sensor!"
Plant Electric Potential (EP) signal correlated..."
Ø ...with solar irradiance,"
Ø ...with plant watering! [IEEE Trans. Instrum. Meas., Feb. 2016]"7/8
Towards Commercial Exploitation"
Ø Technology tested in real-world greenhouse conditions…"
Ø …has attracted International Awards and Distinctions
(e.g., IEEE Sensors 13, IEEE ICASSP 15) "
Ø Entrepreneurial Team ASTRAPI has been formed…"
Ø …in the process of securing IP…"
Ø …extensions to other markets/applications is also possible!
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