Method and apparatus for calibrating a fall detector

Abstract

This invention relates to a method and apparatus for calibrating a fall detector, a method of setting a fall detector, and a fall detector. According to the invention, the method of calibrating a fall detector comprises (a) acquiring the duration of a free fall of the fall detector; (b) calculating the change in height of the fall detector during the free fall from said duration; (c) measuring the change in height of the free fall by the fall detector; (d) calculating the difference between the calculated change in height and the measured change in height; and (e) updating a threshold in the fall detector for determining whether or not a fall has occurred on the basis of this difference.

Description

technical field [0001] The present invention relates to fall detection, and more particularly to a method and apparatus for calibrating a fall detector, a method for setting a fall detector, and a fall detector. Background technique [0002] EP 1642248 describes a wearable multimodal fall detector that uses both an accelerometer and a barometer to increase the reliability of fall detection (see the disclosure of patent document EP 1642248, which will be incorporated by reference). The contents of which are incorporated herein). From the air pressure measured by the barometer, the altitude change of the fall detector during the fall can be derived. If the fall detector is worn on the upper body of the human body, the height of the fall detector will usually be lowered by at least 50 cm, which can be obtained by a barometer. [0003] However, the reliability of fall detectors is low due to the fact that altitude sensors used in fall detectors (eg, barometers) to measure chan...

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Problems solved by technology

However, since the heights of different users are usually different, this introduces additional error for fall detection

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