Topic

Vibration monitoring

What the ground does when a blast fires, how a unit records it, and how to read the numbers.

How far the ground moved from rest — usually a fraction of a millimetre.

How fast the ground is moving at each instant. Compliance limits are written in mm/s.

How fast the velocity is changing. This is what a ViB accelerometer senses.

How many cycles a second. The same travel is a different speed and a different g at a different rate.

A real blast is many tones at once, so the trace is messy. The pure tone is the building block, so you can check the sums.