The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 29, 2008
Filed:
Apr. 22, 2005
Yoshinori Ando, Kanagawa, JP;
Yoshinori Ando, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
In an electronic appliance, accelerations in X-direction, in Y-direction that is orthogonal relative to the X-direction and in Z-direction that is orthogonal relative to both the X-direction and the Y-direction are synthesized and the size of the synthetic acceleration vector formed by synthesizing the accelerations is detected, associated with the clock time of the detection and stored in a synthetic acceleration memory (). A fall candidate is detected when the size of the synthetic acceleration vector is stabilized at a value close to a for a predetermined time period and clock time Tthat is associated with the synthetic acceleration vector that has a size equal to predetermined value b and closest to the clock time Twhen the fall candidate is detected is determined by retrieving the sizes of the synthetic acceleration vectors stored in the synthetic acceleration memory (). Then, the stability of the sizes of the synthetic acceleration vectors from clock time Tto clock time Tthat corresponds to the size of the synthetic acceleration vector that was stored earliest in the synthetic acceleration memory () is detected. Then, the electronic appliance is determined to be falling when a fall candidate is detected and the stability is found within a predetermined range.