Investigation of the capability of the moiré technique in detecting the first displacement of seismic waves

Authors

Abstract

Today, accurate detection of seismic waves is a favorite task for many researchers in this field. Accurate determination of the beginning of seismic phases is also very important in seismological studies. In other words, it is very important to receive seismic pulses and convert them into seismic signals in a way that is highly consistent with reality in terms of reception time and waveform. In this study, a conventional mass-spring oscillation system has been used to detect seismic waves, and a stability system based on the moiré technique has been used to convert the oscillating mass displacement into an electrical signal. In this seismograph, the sensitivity of the seismograph is changed simply by changing the angle between the grid lines or changing their step. Due to the magnification of the moiré technique, this seismograph is capable of detecting very small displacements of the order of a few micrometers. In this study, the response obtained from the moiré seismometer and a sample of conventional seismometers to typical seismics under the same conditions has been investigated. The results show a very good match of the data of both sensor samples. On the other hand, the beginning of the seismic waves reaching the moiré sensor is determined to be much more accurate than that of the conventional sample. The results are a good indication of the efficiency and high accuracy of the moiré seismometer.

Keywords

References

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Volume 8, Issue 1
January 0
Pages 41-48

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