METADATA IN ENGLISH
About the journal
NAUKA I TEKHNOLOGICHESKIE RAZRABOTKI (SCIENCE AND TECHNOLOGICAL DEVELOPMENTS), ISSN: 2079-5165, eISSN: 2410-7948, DOI: 10.21455/std; https://elibrary.ru/title_about.asp?id=32295; http://std.ifz.ru/. The journal was founded in 1992.
PRECISION DIFFERENTIAL THERMOMETERS FOR STUDYING THERMAL PROCESSES BASED ON THE GEOPHYSICAL OBSERVATORY IN NORTHERN CAUCASUS
D.V. Likhodeev1, V.V. Gravirov1,2, K.V. Kislov2
1 Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia
2 Institute of Earthquake prediction Theory and Mathematical Geophysics, Russian Academy of Sciences,
Corresponding author: D.V. Likhodeev, e-mail: firstname.lastname@example.org
– precision thermometers with sensitivity not worse than 0.005 °C are designed
– platinum thermoresistors, filtration, narrow range, differential scheme
– thermometers for studying the fine structure of temperature fields in a rock massif
– monitoring of liquid magmatic melt in the depths of the volcano
– thermometers are designed to assess the volcanic hazard of Elbrus volcano
Abstract. In order to study the fine structure of temperature fields in the thickness of rocks, precision narrow-band temperature sensors have been created that allow carrying out temperature measurements with sensitivity at least 0.005 °C. It is shown, that it is possible to achieve the required sensitivity by narrowing the measuring range, using platinum thermoresistors and 24-bit ADC for digital signal recording. The developed thermometer is based on the using of platinum thermistors, which have a practically linear temperature dependence of the change in internal resistance from the external temperature and excellent long-term stability of their basic characteristics. To reduce the noise level, special technics of low-frequency filtering of both output signals and all supply voltages are applied. The output differential signals of the thermometer allow it to be easily connected to the majority of modern electronic data acquisition systems. Principal ways to achieve the required measurements accuracy, calibration and installation of the necessary operating temperature range of sensors are considered. Carrying out measurements using the developed sensors will provide unique data on the structure and dynamics of the thermal field near the Elbrus volcano in the tunnel of the Geophysical Observatory in Northern Caucasus of the IPE RAS in the Baksan Gorge. This constant monitoring is a particularly very important task, in both point of view as obtaining new fundamental knowledge about the structure of magmatic structures, and as the viewpoint of assessing the volcanic hazard caused by the presence of a liquid magmatic melt in the bowels of the volcano. These data will provide new knowledge about the potential hazard of the Elbrus volcanic center. Carrying out of such researches is especially actual now in the light of actively developing tourist infrastructure both in the Baksan gorge and in the Elbrus region as a whole.
Keywords: temperature sensors, the Earth's thermal field, monitoring.
Cite this article as: Likhodeev D.V., Gravirov V.V., Kislov K.V. Precision differential thermometers for studying thermal processes based on the geophysical observatory in Northern Caucasus, Nauka i tekhnologicheskie razrabotki (Science and Technological Developments), 2018, vol. 97, no. 1, pp. 15–24. [Special issue “Precise Geophysical Monitoring of Natural Hazards. Part 1. Instruments and Technologies”]. [in Russian]. DOI: 10.21455/std2018.1-2
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About the authors
LIKHODEEV Dmitry Vladimirovich – PhD (Phys.-Math.), Senior Researcher, Schmidt Institute of Physics of the Earth, RAS. 123242, Moscow, ul. Bolshaya Gruzinskaya 10, stroenie 1. Ph.: +7(499) 254 9080. E-mail: email@example.com
GRAVIROV Valentin Valentinovich – PhD (Phys.-Math.), Senior Researcher, Schmidt Institute of Physics of the Earth, RAS. 123242, Moscow, ul. Bolshaya Gruzinskaya 10, stroenie 1. Ph.: +7 (499) 254 9080; Senior Researcher, Institute of Earthquake prediction Theory and Mathematical Geophysics, RAS. 117997, Moscow, Profsouznaya ul., 84/32. Ph.: +7(495) 333-4513. E-mail: firstname.lastname@example.org
KISLOV Konstantin Viktorovich – PhD (Phys.-Math.), Senior Researcher, Institute of Earthquake prediction Theory and Mathematical Geophysics, RAS. 117997, Moscow, Profsouznaya ul., 84/32. Ph.: +7(495) 333-4513. E-mail: email@example.com