Shock and vibration detection as part of product warranty protection, these sensors can be part of any drop sensitive devices i.e. Hard disk drives to record shock instances for warranty claims. Here’s an interesting app note (PDF) from Kionix.
This application note describes how to use a Kionix MEMS tri-axis accelerometer as part of a warranty protection system. The system will record free-fall events or high-g events which might void warranty agreements. It can be integrated into a hand-held or portable electronic device or be used as an external module (in a shipping container, for example).