Measurement of very low-frequency vibrations

Judah Levine

doi:10.1117/12.188870

4 October 1994 Measurement of very low frequency vibrations

Judah Levine

Proceedings Volume 2264, Vibration Monitoring and Control; (1994) https://doi.org/10.1117/12.188870
Event: SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, 1994, San Diego, CA, United States

Abstract

We have developed a number of instruments that are capable of measuring vibrations at very low frequencies (below 1 Hz). Two of these instruments are a laser strainmeter, which can respond to strains with frequencies ranging from 0 to about 100 Hz and a borehole tiltmeter which can respond to deflections of the vertical or horizontal accelerations in the frequency range from 0 to about 1 Hz. We have also modified commercial gravity meters (vertical accelerometers) and have used them to make measurements at comparable frequencies. Most of our work has been motivated by geophysical considerations including the dynamics of the earth in seismically active regions, but the instrumentation might also be useful in vibration monitoring for other purposes.

Citation Download Citation

Judah Levine "Measurement of very low frequency vibrations", Proc. SPIE 2264, Vibration Monitoring and Control, (4 October 1994); https://doi.org/10.1117/12.188870

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