Improvements in or relating to fall detectors and fall detection

摘要

A fall of a user is detected by detecting an acceleration and change in angle of the users orientation, processing that data and comparing against thresholds to determine if a fall has occurred, and the detecting apparatus may be worn on the wrist. The detectors may be a gyroscope and an accelerometer. If measured acceleration is large then data may be stored for further analysis. Fuzzy logic may be used to verify falls based on change in angle and maximum gyroscope magnitude. For example, each input may be categorized as low, medium or high, and a fall may be verified if both inputs are medium or higher. Other components may include a geomagnetic sensor (for detecting location), a photoplethysmogram (for detecting activity, blood pressure, blood oxygen and heart rate data), means for transmitting a fall detection, and interaction means such as LED, buttons, voice recognition means, vibration motors or speakers.