EXPANDING THE BANDWIDTH OF A SEISMIC SENSOR
Journal Title: Сенсорна електроніка і мікросистемні технології - Year 2018, Vol 15, Issue 3
Abstract
If we reduce technologically the frequency of natural oscillations of the pendulum of a seismic sensor below 1 Hz, then its performance characteristics become unacceptable. It is shown that by adjusting of the transfer function of the seismic sensor by the transfer functions of the typical dynamic units, a horizontal platform can be obtained in the low frequency region of the amplitude-frequency characteristic. An equation of a proportional-integral-differential controller in a discrete form is proposed in which a feedback signal is calculated using the STM32 microcontroller. Application of the modern microcontrollers to generate a feedback signal allows to flexibly adjust the frequency response of a seismic sensor by directly selecting weight factors, as well as making it remotely tuned. Such a solution combined with the proposed optical method of converting mechanical vibrations into electric allows achieving a high degree of miniaturization of the oscillatory system and obtaining a high level of signal-to-noise ratio of the hardware part.
Authors and Affiliations
V. Zhukovskiy, A. Gokhman, L. Vilinska
Keywords
Related Articles
- EP ID EP400176
- DOI 10.18524/1815-7459.2018.3.142046
- Views 54
- Downloads 0
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