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:
Apr. 24, 2012
Filed:
Nov. 30, 2009
Akihiko Shibata, Kanagawa-ken, JP;
Akihiko Shibata, Kanagawa-ken, JP;
Abstract
By detecting that a differentiation value of the absolute value of acceleration is lower than a negative threshold value DAthin a negative direction from a first stage (S: Stationary state) where the differentiation value of the absolute value of acceleration is approximately 0, it is considered that the stage is in a second stage (S: Fall start state). When the absolute value of acceleration after that has become lower from a threshold value Ath, it is considered that the fall detection device has entered a third stage (S: Low gravity state). When the low gravity state has continued for a given time T, it is considered that the stage is in a fourth stage (S: Falling state), and a fall detection signal is output. Thus, the processing load when the determination is performed by software is reduced and the prediction of a fall can be performed.