Spread of the correlation detection method of movement for heavy objects using seismometers — velocimeters

• Main Authors: Бріцький, О. І., Токалін , О. О.
• Format: Article
• Language: Ukrainian
• Published: Інститут проблем реєстрації інформації НАН України 2024
• Subjects: movement of heavy equipment; digital laser seismometers; velocimeters; seismic portraits of speed and the processes themselves; cross-correlation analysis
• Online Access: http://drsp.ipri.kiev.ua/article/view/317415

The results of research on the identification both natural and man-made seismic events using digital laser seismometers are presented. The study is aimed at identifying seismic events by using precision laser seismometers and methods of correlation analysis. However, the most widespread in seismology devices are velocimeters, which measure the rate of oscillation of the Earth's surface. For examples they can be seismometers STS 2, Guralp CMG-T40, various molecular-electronic, geophones and others. Therefore, the task of spreading the developed method of correlation detection of the movement of heavy objects when using velocimeters is urgent. The research presents an analytical approach for identifying relationships between the cross-correlation functions of seismic processes obtained by measuring displacements and velocities. Such a connection has been confirmed experimentally. At the same time, the same seismic process, registered during 4 hours, was studied. Various seismic portraits of the movement of heavy objects were used. In the given example, the time difference between the recording of the seismic portrait and the process itself was about 4 years. The rates of seismic processes were interpreted by their first differences. Seismic portraits and seismic processes were interpreted separately. The sampling rate was 100 Hz. A sampling rate of 2 kHz was used for the analysis of faster processes. Minor differences in the obtained results are explained by the increased influence of noise interference when measuring the speed. Fig.: 2. Refs: 6 titles.