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Index Geophysics

Instrumenti na stanici za praćenje disanja Zemljine kore na RGN fakultetu Zagreb

Item

Title (Dublin Core)

hrv Instrumenti na stanici za praćenje disanja Zemljine kore na RGN fakultetu Zagreb
eng Instrumentation of the Earth-breathing monitoring Station at the Faculty of Mining Geology and Petroleum Engineering, Zagreb

Description (Dublin Core)

hrv Na RGN fakultetu u Zagrebu prvi je put u našoj zemlji uspješno puštena u pogon stanica za praćenje disanja Zemljine kore. U pogon stanice uključeni su različiti mjerni instrumenti: Permanentna Trimble GNSS-stanica, vertikalni ekstenzometar, dvokomponentni tiltmetar, jednokomponentni tiltmetar i stacionarni gravimetar LaCoste & Romberg ET 16. GNSS-antena postavljena je na stup na terasi iznad rudarskog okna i antenskim kabelom spojena na prijamnik koji je uz pomoć LAN-mreže povezan s centralnim računalom. Svi ostali mjerni uređaji spojeni su na data-logger koji je također pomoću LAN-mreže povezan s centralnim računalom. U istom prostoru gdje je postavljen data-logger smješteni su svi kontrolni uređaji potrebni za rad tih instrumenata. Kod gravimetra, tiltmetra i vertikalnog ekstenzometra primijenjeni su kapacitivni senzori, a kod gravimetra je na iste ploče kondenzatora priključena i elektrostatička povratna veza. Svi ti elektronički uređaji vlastite su konstrukcije. Signali s mjernih instrumenata direktno se ili preko niskopropusnih Butterworthovih filtara (strmine 18 dB/oktavi i vremenske konstante 100 s) dovode na data-logger. Uz signale sa spomenutih mjernih uređaja prikupljaju se također i podaci sa senzora tlaka zraka (digitalni barometar) te registrira temperatura u gravimetru, kućištu elektronike kapacitivnog senzora tiltmetara, a također temperatura prostora mjernih uređaja i rudarskog okna. Na displeju računala moguće je praćenje registracija, koje se uzorkuju svake sekunde, uz Flukeov grafički program Trend-link, a za obradu drugim standardnim statističkim programima podaci mjerenja pohranjuju se u CSV ASCII kodu. Predviđeno je da se mjerni podaci registrirani kao vremenski nizovi statistički obrade i primijeni Fourierova spektralna analiza sadržaja registracije te korelacijska i križna kovarijantna analiza. Posebno je značenje tih istraživanja u tome što će se na temelju mjerenja i registracija vremenskih nizova prvi put u našoj zemlji preciznim stacionarnim gravimetrom odrediti realni parametri elastičnosti Zemlje i njihova odstupanja od teorijskih parametara, a ujedno i maksimalne amplitude plimnih valova za tu lokaciju. Isto je tako posebno važan egzaktni postupak određivanja vlastite frekvencije zgrade, što će u budućem sustavu zaštite od potresa morati postati jedan od standardnih postupaka pri zoniranju hazarda zgrada u gradovima.
eng At the Faculty of Mining Geology and Petroleum engineering of the University Zagreb for the first time in our country a station for Earth-breathing monitoring was successfully established. Different instruments are included in the station operation such as a permanent Trimble GNSS station, a vertical extensometer, a two-component tilt-meter, an one-component tilt-meter and a LaCoste & Romberg Earth-tide gravity-meter (model ET 16). The GNSS antenna is fixed on the terrace over the mining shaft and with a cable connected to the receiver which is via LAN connected to the host computer. All other measuring instruments are connected to a data logger which is also connected to the host computer. In the same room with the data logger all control equipments for the installed instruments are placed. The gravity-meter, tilt-meter and the vertical extensometer are equipped with a capacitive sensor and the same condenser plates of the gravity-meter are used for the electrostatic feedback. All these electronics was developed by the author. Signals from the measuring instruments are directly or over a Butterworth low-pass filter (18 dB/octave and T=100 s) connected to the data logger. Besides signals from the mentioned instruments several other sensors for barometric pressure and temperature inside the instruments and the surrounding space are registered. The registration could be followed on the computer display by means of the FLUKE graphic program Trend-link. For calculation purposes with other standard statistic programs the Data are saved in ASCII format as CSV (Comma Separated Values). It is foreseen that the registered time series will be processed with Fourier spectral analyses programs so as correlation and covariance analyses. A special meaning of this research is that for the first time in our country using a precise gravity-meter elastic parameters of the Earth and a comparison to the theoretically parameters will be determined so as maximally Earth-tide amplitudes for this location. Also the exact determination of building resonance frequencies is of big importance especially for the future earthquake risk system which must become a standard process in building hazard zoning in cities.

Creator (Dublin Core)

Marjanović Kavanagh, Radovan

Subject (Dublin Core)

hrv gravimetar; 2-komponentni tiltmetar; vertikalni ekstenzometar; kapacitivni senzor; Fourierova spektralna analiza; korelacijska analiza; kovarijantna analiza; parametri elastičnosti Zemlje; vlastita frekvencija zgrada; registracije potresa i mikroseizmike
eng gravity-meter; 2-component-tilt-meter; vertically extensometer; capacitive sensor; Fourier spectral analysis; correlation analysis; covariant analysis; Earth's elastic parameters; resonant frequency of buildings; earthquake and micro seismic registrations

Publisher (Dublin Core)

Croatian geodetic society

Date (Dublin Core)

2013

Type (Dublin Core)

text
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion

Format (Dublin Core)

application/pdf

Identifier (Dublin Core)

https://hrcak.srce.hr/104405
hrv https://hrcak.srce.hr/file/153504

Source (Dublin Core)

Geodetski list
ISSN 0016-710X (Print)
ISSN 1849-0611 (Online)
Volume 67 (90)
Issue 2

Language (Dublin Core)

hrv

Rights (Dublin Core)

info:eu-repo/semantics/openAccess
Full-text papers can be used for personal or educational purposes only. Authors' and publisher's copyrights must be acknowledged.