Free fall detection system for protecting hard drives in mobile devices
AssigneeRobert Bosch GmbH
InventorsJulian Bartholomeyczik, Sergej Scheiermann
Life of this patent
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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 value of the first acceleration, a second value of the second acceleration, and a third value of the third acceleration is calculated, and the free fall is detected as a function of the sum.
Claims11
A method for detecting a free fall of a mobile device, comprising:
- measuring a first acceleration parallel to a first axis;
- measuring a second acceleration parallel to a second axis perpendicular to the first axis;
- measuring a third acceleration parallel to a third axis perpendicular to the first axis and to the second axis;
- calculating a sum of a first value of the first acceleration, a second value of the second acceleration, and a third value of the third acceleration;
- and
- detecting the free fall of the mobile device as a function of the calculated sum.
A device for detecting a free fall of a mobile device, comprising:
- a triple-axis acceleration sensor configured to measure (i) a first acceleration parallel to a first axis, (ii) a second acceleration parallel to a second axis perpendicular to the first axis, and (iii) a third acceleration parallel to a third axis perpendicular to the first axis and to the second axis;
- and
- an evaluation circuit configured to (a) calculate a sum of a first value of the first acceleration, a second value of the second acceleration, and a third value of the third acceleration, and (b) detect the free fall of the mobile device as a function of the calculated sum.
Dependencies are inferred from the claim text.