Free fall detection system for protecting hard drives in mobile devices
First Claim
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1. 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.
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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.
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Citations
11 Claims
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1. A method for detecting a free fall of a mobile device, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A device for detecting a free fall of a mobile device, comprising:
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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. - View Dependent Claims (9, 10, 11)
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Specification