Abstract
We have developed an autonomous portable digital seismometer for measurements in the field, in engineering constructions, and in hard-to-reach places. The seismometer is a monoblock including an SM-6 seismic receiver and digital seismic recorder. The SM-6 seismic receiver is a highly effective device for field work on investigating a microseismic wave field and for use in systems of seismological monitoring. Field tests of these seismic receivers in comparison with well-known SM-3 devices were carried out. The basic part of the seismic recorder is an MSC1213Y5 system-on-chip representing a precision 24-bit ADC coupled with an 8051 compatible microcontroller. Autonomy of the seismometer up to 30 days is provided with data recording into a flash memory chip of 1 Gbyte capacity. Time synchronization of seismic data is provided with the PPS second mark received from a GPS receiver. A preproduction model of the portable digital seismometer was manufactured and tested. As a result of tests, the working capacity of this preproduction model has been confirmed and its basic technical characteristics have been determined.
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