Free fall detection system for protecting hard drives in mobile devices

US9514780B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Julian Bartholomeyczik · Reutlingen, DE
• Sergej Scheiermann · Eningen unter Achalm, DE

Key dates

• Filing date: Mar 1, 2011
• Grant date: Dec 6, 2016
• Expiry date: Feb 5, 2033

Classification

• Technology area (CPC G): Physics
• CPC primary: G01P15/18
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

In a method for detecting free fall, a first acceleration parallel to a first axis, a second acceleration parallel to a second axis perpendicular to the first axis, and a third acceleration parallel to a third axis perpendicular to the first axis and to the second axis are measured. A sum of a first absolute value of the first acceleration, a second absolute value of the second acceleration, and a third absolute value of the third acceleration is calculated, and the free fall is detected as a function of the sum.