Shock and Vibration Application Brief
The Montgomery Elevator Company designs and builds elevators,
escalators, and power walks.
Getting stuck in an elevator is a problem most people fear, and even
more of us have experienced elevator rides that feel or sound unsafe.
While an elevator in good working order runs efficiently enough to be
ignored, one that isn't working right gets everyone's attention. It is
the responsibility of Rick Goetzl of the Montgomery Elevator Company in
Moline, Illinois to determine the condition of operating elevators and
keep them running smoothly and anonymously. He prevents emergencies by
tracking down small problems before they become big ones.
Tracking 3D Movements
Analyzing the movement of an elevator ride is a difficult operation
because an elevator car moves from side to side and from front to back
as well as up and down. The equipment used for recording data must
allow for recording in three dimensions. It must also be able to pick
up a large spectrum of vibrations from all the machinery involved,
since odd noises at specific frequencies indicate specific mechanical
Flexible Motion Analysis Software Required
As if these requirements weren't stringent enough, the
entire recording setup must be small enough to fit into a carrying
case. Data analysis software must interface smoothly with the
acquisition equipment, and must be able to extract individual runs from
a recording of thousands of data points. It must also be flexible
enough to manipulate data in three dimensions and display graphs so
that evaluations can be made of an elevator's overall motion.