Page - 1308 - in Book of Full Papers - Symposium Hydro Engineering

receiving the vibrating wire and analogue inputs and automatically collect, store and transmit data from the connected sensors. The RF gateway ( Fig. 8) controls the network and is the aggregator of all data collected by the nodes. It has an integrated 3G modem with antenna supporting HSDPA, EDGE & GPRS, and a high sensitivity GPS-GNSS module. The gateways transmit the data over the cellular network to web data monitoring service described in section 3. The system offer benefits by means of hassle-free installation- as cable runs-often long and tedious at the dam sites are not involved, cost & time savings, remote monitoring of hard to access locations, easy expansion of the system, if required in future, and easy maintenance. Fig. 7 Dam monitoring sensors connected to an RF network Fig. 8 RF gateway SEEPAGE/FLOW CLOUD WDMS SERVER INTERNET REMOTE USER PC/LAPTOP BOREHOLE EXTENSOMETER VW PIEZOMETERTILT METER VW CRACK METER STRAIN/ STRESSESTELECOORDINOMETER WEATHER STATION INTERNET GATEWAY WIRELESS NODES -1-5 CHANNEL FOR VW, ANALOG & DIGITAL SENSORS LONG RANGE RADIO 1308