Carreras Pons, Normandino

Gomáriz Castro, Spartacus

Manuel Lázaro, Antonio

English

UPCommons. Portal del coneixement obert de la UPC

Geophysical Research AbstractsVol. 16, EGU2014-5066-1, 2014EGU General Assembly 2014© Author(s) 2014. CC Attribution 3.0 License.Small instrument to volcanic seismic signalsNormandino Carreras, Spartacus Gomariz, and Antoni ManuelSARTI Research Group. Electronics Dept. Universitat Politecnica de Catalunya (UPC). Rambla Exposicio 24, 08800,Vilanova i la Geltru. Barcelona. Spain. www.cdsarti.orgCurrently, the presence of volcanoes represents a threat to their local populations, and for this reason, scientificcommunities invest resources to monitor seismic activity of an area, and to obtain information to identify risksituations. To perform such monitoring, it can use different general purpose acquisition systems commerciallyavailable, but these devices do not meet to the specifications of reduced dimensions, low weight, low powerconsumption and low cost. These features allow the system works in autonomous mode for a long period of time,and it makes easy to be carried and to be installed.In the line of designing a volcanic acquisition system with the previously mentioned specifications, existsthe Volcanology Department of CSIC, developers of a system with some of these specifications. The objective ofthis work is to improve the energy consumption requirements of the previous system, providing three channels ofdata acquisition and with the possibility to transmit data acquisition via radio frequency to a base station, allowingoperation it in remote mode.The developed acquisition system consists of three very low-power acquisition modules of Texas Instru-ments (ADS1246), and this is designed to capture information of the three coordinate axes. A microprocessor alsoof Texas Instruments (MSP430F5438) is used to work in low-power, due to it is ready to run this consumptionand also takes advantage the power save mode in certain moments when system is not working. This system isconfigurable by serial port, and it has a SD memory to storage data. Contrast to the previous system, it has aRF communication module incorporated specially to work in remote mode of Lynx (YLX-TRM8053-025-05),and boasts also with a GPS module which keeps the time reference synchronized with module of SANAV(GM-1315LA). Thanks to this last selection of components, it is designed a small system about 106 x 106 mm.Assuming that the power supply system is working during all the time, except GPS (it works the 1.4% oftime) and the RF communications (it works the 20% of time), it has been able to obtain experimental consumptiondata of prototype developed. That is the reason why the final power supply of system with one channel active is of110,5mW when using the communication module. If it calculates the power supply without communication, thisconsumes about 71mW. The new system needs to work at 3.3V, and the calculations have made in base of that.In contrast, the previous system needs 12V, and does not use RF communications. In order to compare those twoversions, is used the power supply as reference, up to 696mW in this previous system.Finally it can be concluded that the implemented electronic design has up to three channels to acquireseismic data, it has the ability to transmit these data by radio frequency to a base station, and power consumptionis lower than the initial prototype. The experimental results allow providing an operating time of a year, withweight of 4,84 Kg if the equipment used li-ion batteries.

Small instrument to volcanic seismic signals

UPCommons

https://upcommons.upc.edu/bitstream/2117/25520/1/EGU2014-5066-1.pdf

Small instrument to volcanic seismic signals

Abstract

Similar works

Full text

Available Versions

UPCommons. Portal del coneixement obert de la UPC

UPCommons