Advanced Sensors for Field Server M. Hirafuji, H. Hu and T. Fukatsu Computational modeling Lab. National Agricultural Research Center Tsukuba Japan
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
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
UV, CO2 and Leaf-wetness sensors
Wetness Sensor Raindrops Humidity sensor Screen
Installed Wetness Sensor
Wetness Detection
Relationship CO2 & UV
Fully Unwired (Cable-less)
Network Architecture Cable Solar-energy Driven Field Servers (Client connection, Intermittent work) Hotspot Interconnection between APs Conventional Field Servers (Access-point, Continuously work)
A Result of Field Test
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.