AFORS autonomous fibre-optic rotational seismograph: Design and application |
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| Authors: | Leszek R Jaroszewicz Zbigniew Krajewski Henryk Kowalski Grzegorz Mazur Pawe? Zinówko Jerzy Kowalski |
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| Institution: | 1.Institute of Applied Physics,Military University of Technology,Warszawa,Poland;2.Institute of Computer Science,Warsaw University of Technology,Warszawa,Poland;3.ELPROMA Electronics Ltd,?omianki,Poland;4.m-Soft Ltd,Warszawa,Poland |
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| Abstract: | We outline the research leading to development of the Autonomous Fibre-Optic Rotational Seismograph (AFORS) and describe the
final version of the instrument. The instrument with linear changes of sensitivity keeps accuracy from 5.1 × 10−9 to 5.5 × 10−8 rad/s in the detection bandpass 1.66–212.30 Hz; it is designed for a direct measurement of rotational components emitted
during seismic events. The presented system is based on the optical part of the fibre optic gyro construction where a special
autonomous signal processing unit (ASPU) optimizes its operation for the measurement of rotation motions instead of the angular
changes. The application of a newly designed telemetric system based on the Internet allows for a remote system control, as
shown in an example of the system’s operation in Książ (Poland) seismological observatory. |
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