LOW FREQUENCY PRIMARY VIBRATION CALIBRATION USING A MULTI-COMPONENT SHAKER

N. Yan, L. Klaus, T. Bruns

Abstract

The multi-component vibration calibration device at PTB consists of a triaxial shaker which is suitable and convenient for calibrating multi-axial seismometers. Three laser vibrometers are furthermore utilised as references. The frequency range was further extended for a European research project. Instead of a closed-loop control system limiting the vibration frequency down to 0.4 Hz, a signal generator is now used to provide the excitation voltage to the amplifier of the shaker in open-loop mode. This excites the shaker yielding vibrations with significantly lower frequencies. The first test measurements with a seismometer were carried out. The results demonstrate that a calibration down to 10 mHz is easily achievable.

Keywords

primary vibration calibration; seismometer; multi-component shaker; low frequency

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IMEKO-TC22-2022-019.pdf

DOI

10.21014/tc22-2022.019

IMEKO TC

TC22 - Vibration Measurement

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