Method and device for detecting anomalous events for an electronic apparatus, in particular a portable apparatus

US7979235B2 · kind B2 · utility

Assignee

• STMicroelectronics SA

Inventors

• Fabio Pasolini · Pavullo nel Frignano, IT
• Alberto Ressia · Tortona, IT

Key dates

• Filing date: Jan 22, 2009
• Grant date: Jul 12, 2011
• Expiry date: Apr 19, 2029

Classification

• Technology area (CPC G): Physics
• CPC primary: G11B19/043
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Detection of an anomalous event in an electronic apparatus includes detecting accelerations acting on the electronic apparatus, establishing a normal-mode range of accelerations that corresponds to normal operation of the apparatus, and detecting the anomalous event when a level of acceleration of the electronic apparatus exits the normal-mode range and remains outside the normal mode range for more than a defined duration. The method includes displacing the normal-mode range toward a current level of acceleration of the electronic apparatus while the level of acceleration remains outside the normal-mode range. Additionally, the normal-mode range is increased toward a maximum size while the level of acceleration remains outside the normal-mode range, and is decreased toward a minimum size while the level of acceleration is within the normal-mode range.