Resonance System

Description

This original apparatus gives students a modern approach
to a fascinating topic with great scope for imaginative research. An acrylic base unit supports a hacksaw blade
which is loaded at the top with a detachable brass weight.
An electromagnetic drive coil, connected to a standard
laboratory signal generator can cause the blade to vibrate
in various modes. A bimorph, piezo-electric transducer,
bonded to the blade, detects the amplitude of the vibration
when its output is monitored on a C.R.O. Students can
study the amplitude of vibration and resonance as a function of drive frequency. In addition, there is a mechanical
damping system provided by a thin aluminium vane moving
in a small vessel containing water. The amount of damping is controlled by the depth of water used. The effect of
damping on resonance can be studied.
SP4-1788