Page 14 - Vibrations 3

This is what most of them look like for

measuring vibrations.

A special cable is attached to the device

which feeds into a charge amplifier.

Commercial charge amplifier made by

famous company Brūel & Kjaer.

Note the input connector for the

accelerometer.

You can vary the gain and the filtering

characteristics of the device.

Needed because the accelerometer

will only operate in a linear fashion

over a limited frequency range.

Being a mechanical

structure, it has its own

resonance.

The accelerometer is

operated well away from

the resonance as you can

see in the above diagram.

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