1. Advanced Sensors for Field Server
M. Hirafuji, H. Hu and T. Fukatsu
Computational modeling Lab.
National Agricultural Research Center
Tsukuba Japan

2. Requirements and Strategy
Effective sensation
Low energy
consumption
Low cost
Small
Maintenance-free
Calibration-less
New sensors by new methods
Combination of sensor-net and conventional sensors
Data shared
by user’s
collaboration
Interdisciplinary
collaboration
International
collaboration
Mass-production with system LSI

3. Effective Sensation Temp, RH, Light and Image for all users
CO2 for farmers and environmental scientists
UV for outdoor sport players and environmental scientists
Wetness for housekeepers and farmers
Soil Moisture for farmers and environmental scientists
Virus and bacteria for residents, farmers and biological scientists

4. UV, CO2 and Leaf-wetness sensors

5. Wetness Sensor
Raindrops
Humidity sensor
Screen

6. Installed Wetness Sensor

7. Wetness Detection

8. Relationship CO2 & UV

9. Fully Unwired (Cable-less)

10. Network Architecture Cable
Solar-energy Driven Field Servers (Client connection, Intermittent work)
Hotspot
Interconnection between APs
Conventional Field Servers
(Access-point, Continuously work)

11. A Result of Field Test

12. Conclusions
Solar-cell-driven Field Server was developed for sensor-network.
Leaf-wetness sensors was developed.
CO2 & UV sensors were tested.
New sensors can be developed instantly by using Field Monitoring Servers
3ch soil moisture sensor is under developing.