Can the MB-LDV VibroMet tolerate changes in signal amplitude, which may occur when particles or other obscurants block the laser beam?
Yes. The MB-LDV VibroMet measures optical phase changes due to target vibration. This optical phase change is manifested as a frequency modulated signal upon mixing the target signal with the reference beam local oscillator. Thus signal amplitude fluctuations would have very little effect on the signal frequency provided that the amplitude of the signal stays above a reasonable threshold. If the signal amplitude falls below the threshold then the instrument would experience a “dropout.” Our software would look at regions between dropouts and report the valid data.
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