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Long-Term Operation of Landslide Observation System Using ZigBee Modules

SocDic Conference. Long-Term Operation of Landslide Observation System Using ZigBee Modules. University of Tsukuba Geo-Sensing Lab Wang Rui. Contents. 1. 3. 2. 5. 4. About landslide. Conclusion. Our new system. Landslide observation system. About ZigBee. About landslide.

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Long-Term Operation of Landslide Observation System Using ZigBee Modules

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  1. SocDic Conference Long-Term Operation of Landslide Observation System Using ZigBee Modules University of Tsukuba Geo-Sensing Lab Wang Rui

  2. Contents 1 3 2 5 4 About landslide Conclusion Our new system Landslide observation system About ZigBee

  3. About landslide • What is landslide? • A landslide is a geological phenomenon that rocks, earth, or debris flows on slopes due to gravity. Landslide can occur in any kind of terrain given the right conditions of soil, moisture and the angle of slope. Fig1. El Salvador.2001

  4. About landslide Landslide in Japan and Indonesia West Java, 2010 Landslide in Japan Landslide observation System is very important and strongly needed western Sumatra , 2009 Fig2. Landslide in Indonesia and Japan

  5. Landslide observation System Function of the Landslide observation System Landslide observation system Landslide monitoring Landslide warning • Effective measures for landslide. • Necessary to measure before occurring landslide. Target of measurement • Displacement surface of the ground • Displacement in the ground • Water level in the ground • Amount of rainfall

  6. Landslide observation System Current landslide observation system • Wired system • Wireless system • other wireless standards • → narrow observation area • → Power is problem • → If many nodes, high cost Fig3. Wired monitoring system • wired observation system • → breaking of wire • → high-cost Fig4. Wireless monitoring system

  7. Landslide observation System Our system Based on ZigBee technology Fig5. Landslide observation system using ZigBee Advantage • Fast installation(no drilling is necessary) • Higher stability(no cables break) • Data transmission is real-time • Permanent data transmission and data collection • Power saving(ZigBee device sleeping mode)

  8. About ZigBee What is ZigBee ? • ZigBee is a Ad-hoc networking technology • Based On IEEE 802.15.4 standard • Intended for 2.45 GHz , 868 MHz and 915 MHz Band. • Low in cost ,complexity & power consumption • Data rates touch 250Kbps for 2.45Ghz, 40 Kbps 915Mhz and 20Kbps for 868Mhz band. Fig6. ZigBee device Advantage • Network capacity • Low power consumption • Low cost • Bought freely

  9. About ZigBee Table1. Comparison with other wireless communication standards Zigbee is especially suitable for instrument measurement and control

  10. INDUSTRIAL & COMMERCIAL About ZigBee ZigBee Application TV VCR DVD/CD remote CONSUMER ELECTRONICS monitors sensors automation control ZigBee LOW DATA-RATE RADIO DEVICES PC & PERIPHERALS PERSONAL HEALTH CARE TOYS & GAMES HOME AUTOMATION consolesportables educational security HVAC lighting closures

  11. About ZigBee ZigBee Flexible network topology Star Cluster tree Mesh Fig7. Network topology

  12. Our new system network topology : mesh Fig8. working process Fig9. Network of our system

  13. Our new system System component • GeoSense: • Network operations • Communicate external device • State transition • GeoSense Coordinator: • Formation of networks • Control GeoSense • AirSenseWare (software): • Control GeoSenseCoordinator • Monitor network • Collect and record data GeoSense Coordinator GeoSense Fig10. GeoSense Fig9. Outline of system

  14. Our new system Problem using mesh network GeoSense Coordinator To work as ZigBee-Router, loss of original power-saving GeoSense • Normal ZigBee device： • can not be set into sleeping mode when • using mesh network • Our laboratory’s ZigBee device(GeoSense)： • can be set into sleeping mode when using mesh network Fig10. GeoSense Improve Power-Saving of ZigBee is important for this study Our ZigBee system’s working time is much longer.

  15. Our new system Experiment of Small-Scale System • System component • AirSense Ware (1) • GeoSense Coodinator (1) • GeoSense (4) • GeoSense with external measurement device(1) • Network topology • Mesh topology External measurement device Fig12. Experiment network Fig11. Small-scale system

  16. Our new system Fig13. Implementation and equipment of landslide observation system • Get environment data • Temperature ,water level , slope • Number of measurement • 72times • Measurement time • A day

  17. Our new system Fig14. Accumulated environmental data • Measure three times per hour properly • Confirmed the power saving function works properly • Get various environment data ,such as temperature and water level , slope , etc to change sensor

  18. Our new system Conclusion • Landslide observation system is very useful for both Japan and Indonesia. • ZigBee is muchsuitable for Landslide observation system • GeoSense can be set into sleeping mode when using mesh network. It is more power-saving. • Many types of data can be obtained for landslide early warning

  19. Thank You !

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