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Proceedings Paper

Wireless system for explosion detection in underground structures
Author(s): M. Chikhradze; N. Bochorishvili; I. Akhvlediani; D. Kukhalashvili; I. Kalichava; E. Mataradze
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Paper Abstract

Considering the growing threat of terrorist or accidental explosions in underground stations, underground highway and railway sections improvement of system for protecting people from explosions appears urgent. Current automatic protective devices with blast identification module and blast damping absorbers of various designs as their basic elements cannot be considered effective. Analysis revealed that low reliability of blast detection and delayed generation of start signal for the activation of an absorber are the major disadvantages of protective devices. Besides the transmission of trigger signal to an energy absorber through cable communication reduces the reliability of the operation of protective device due to a possible damage of electric wiring under blast or mechanical attack. This paper presents the outcomes of the studies conducted to select accurate criteria for blast identification and to design wireless system of activation of defensive device. The results of testing of blast detection methods (seismic, EMP, optical, on overpressure) showed that the proposed method, which implies constant monitoring of overpressure in terms of its reliability and response speed, best meets the requirements. Proposed wireless system for explosions identification and activation of protective device consists of transmitter and receiver modules. Transmitter module contains sensor and microprocessor equipped with blast identification software. Receiver module produces activation signal for operation of absorber. Tests were performed in the underground experimental base of Mining Institute. The time between the moment of receiving signal by the sensor and activation of absorber - 640 microsecond; distance between transmitter and receiver in direct tunnel - at least 150m; in tunnel with 900 bending - 50m. This research is sponsored by NATO's Public Diplomacy Division in the framework of "Science for Peace".

Paper Details

Date Published: 5 August 2009
PDF: 8 pages
Proc. SPIE 7502, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2009, 75021U (5 August 2009); doi: 10.1117/12.837523
Show Author Affiliations
M. Chikhradze, G. Tsulukidze Mining Institute (Georgia)
N. Bochorishvili, G. Tsulukidze Mining Institute (Georgia)
I. Akhvlediani, G. Tsulukidze Mining Institute (Georgia)
D. Kukhalashvili, G. Tsulukidze Mining Institute (Georgia)
I. Kalichava, G. Tsulukidze Mining Institute (Georgia)
E. Mataradze, G. Tsulukidze Mining Institute (Georgia)

Published in SPIE Proceedings Vol. 7502:
Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2009
Ryszard S. Romaniuk; Krzysztof S. Kulpa, Editor(s)

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