Determination of the parameters of the acoustic device for rescuer equipment

Alexander Levterow

National University of Civil Defenсe of Ukraine

http://orcid.org/0000-0001-5926-7146

Evgeniy Statyvka

National University of Civil Defenсe of Ukraine

http://orcid.org/0000-0003-1536-2031

DOI: https://doi.org/10.52363/2524-0226-2022-36-21

Keywords: acoustic device, sensor, impedance, reflection coefficient, wrecking, unsatisfactory visual control

Аnnotation

As part of the use of the effect of acoustic emission, the article considers the possibility of creating spatial orientation devices for equipping rescuers. The introduction of an acoustic device placed on the rescuer's equipment as an additional element of equipment to increase the efficiency of orientation in an environment unsatisfactory for visual control in order to reduce the time of searching for the victim and the time required for evacuation is substantiated. The introduction of an acoustic device to reduce the number of cases of injury to rescuers during emergency rescue operations indoors and in conditions with unsatisfactory visual control, especially in wartime, is substantiated, which will reduce the time of searching for a victim, protect the rescuer from injuries, and reduce the total time spent searching. -rescue works and works to eliminate emergency situations. The most influential characteristics of the emergency situation due to fire on acoustic waves have been determined. It is proposed to use correction coefficients that take into account the influence of the characteristics of the emergency situation on acoustic waves: angle of incidence, concentration of suspended particles, temperature, wave resistance of the medium when determining the parameters of the obstacle and the distance to it in order to increase the accuracy of the measurements. It is proposed to use: reflection coefficient, wave impedance, temperature of the medium. A dependence is proposed that takes into account the effect on the propagation of acoustic waves when determining the shape of the obstacle. A technical solution and a scheme for placing sensors of the acoustic action device on the rescuer's equipment to determine the shape of the obstacle are proposed. Placing acoustic devices on the rescuer's equipment at knee level to reduce injuries when moving in conditions of unsatisfactory visual control is substantiated.

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