Title: Fall detection device
Application Number: 200610110065 Application Date: 2006.08.04
Publication Number: 1908675 Publication Date: 2007.02.07
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G01P15/00;G11B19/04;G11B19/20;G11B33/08;G11B33/10
Applicant(s) Name: Hitachi Metals Ltd. Address:
Inventor(s) Name: Noda Masaru;Abe Yasunori
Attorney & Agent: ma gao
Abstract:
    A fall detection device is provided, which accomplishes a fall judgment on acceleration by a simple calculation and improves uniformity of effective threshold value for the acceleration judgment as to a direction of an applied acceleration vector. The fall detection device produces a fall detection signal, when an absolute value of each axis component of an acceleration measured by a three-axis acceleration sensor 1 is less than a first threshold value, and when a sum of the absolute values of the axis components of the acceleration is less than a second threshold value that is 1.5 times to 2 the first threshold value.
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