Design and Implementation of NonAutonomous Mobile Wireless Sensor

Design and Implementation of Non-Autonomous Mobile Wireless Sensor for Debris Flow Monitoring Mobile Adhoc and Sensor Systems, 2009. MASS '09. IEEE 6 th International Conference on Author(s): Huang-Chen Lee, Chuan-Yu Cho, Chung-Ta King, Yao-Min Fang, Bing-Jean Lee 1

INTRODUCTION • The mountain terrain is precipitous, and fragile rocks and frequent seismic activities characterize the region. • Such land conditions were further deteriorated after excessive developments in the mountain areas and the devastating 921 earthquake in 1999. 4

INTRODUCTION • Close monitoring and early warning of debris flows become imperative to save life and reduce damage. • monitored area is usually limited by the availability of existing facilities and only a few sample locations are able to be examined. 5

Current Technology 6

Current Technology • Unfortunately, most of this equipment indirectly collects data only from a distance. So far, there is no way to understand what is happening inside a debris flow and to collect its internal parameters, not to mention doing this in real time. 7

Advantages • 1. Scatter and Deploy • 2. Design • 3. The cost of equipment, deployment labor, and maintenance of the proposed system are low. • 4. Dual Power – Alkaline Battery(Two D) – Solar Panel 8

Advantages • 5. The price of each mobile sensor is about 200 USD. To set up a motioning site using six mobile sensors and riverbank receivers, the cost is below 2000 USD. Our system has a very good cost-efficiency ratio in comparison with conventional apparatus. 9

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INSIDER • Two operation modes: ACTIVE mode and SLEEP mode • Any INSIDER receiving the low frequency vibration generated by the moving debris flow will change its operational mode to ACTIVE. It then sends alarm messages to COORIDNATORs on the riverbank. 11

INSIDER 12

INSIDER 13

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Energy • Energy consumption is the most critical factor to make INSIDER to work for a long time. 15

CONCLUSION • we present the model of debris flow monitoring system, including a real INSIDER and a scale-down COORDINATOR. • For interactive demonstration, the simulated debris flow approaching the INSIDERs will trigger the INSIDERs into ACTIVE mode. • The INSIDERs then start to send out the measured raw vibration data and these data are display on the PC. 16

REFERENCES • Design of a Multifunctional Wireless Sensor for In-Situ Monitoring of Debris Flows • 土石流防災資訊網 17