Fall Detection Apparatus, Magnetic Disk Apparatus, and Portable Electronic Apparatus
First Claim
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1. A fall detection apparatus that detects a fall on the basis of an output signal of an acceleration sensor, the apparatus comprising:
- an acceleration detector configured to obtain detected acceleration values in three axis directions orthogonal to one another; and
a fall determination output unit configured to obtain a determination value which is, among the detected acceleration values in the three axis directions obtained by the acceleration detector, a difference between the detected acceleration value corresponding to a reference axis direction and the detected acceleration value not corresponding to the reference axis direction, and configured to generate a falling state signal when a preliminary determination state in which the determination value is within a predetermined range continues for a predetermined continuation time or longer.
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Abstract
A fall detection apparatus that detects values ax, ay, and az in accordance with acceleration in three mutually orthogonal axes (x, y, and z). Among these detected values, the fall detection apparatus determines values dxy and dzy which are the differences between the detected value for a reference axis, e.g., the y-axis, as well as the other detected values. A falling state signal is then generated when a preliminary determination state in which the determination values are within predetermined ranges continues for a predetermined time or longer.
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16 Claims
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1. A fall detection apparatus that detects a fall on the basis of an output signal of an acceleration sensor, the apparatus comprising:
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an acceleration detector configured to obtain detected acceleration values in three axis directions orthogonal to one another; and a fall determination output unit configured to obtain a determination value which is, among the detected acceleration values in the three axis directions obtained by the acceleration detector, a difference between the detected acceleration value corresponding to a reference axis direction and the detected acceleration value not corresponding to the reference axis direction, and configured to generate a falling state signal when a preliminary determination state in which the determination value is within a predetermined range continues for a predetermined continuation time or longer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification