Posture sensor automatic calibration

摘要

A system and method automatically calibrate a posture sensor, such as by detecting a walking state or a posture change. For example, a three-axis accelerometer can be used to detect a patient's activity or posture. This information can be used to automatically calibrate subsequent posture or acceleration data.

主权项

1. A device comprising:
an accelerometer configured to sense an acceleration signal from a patient; a filter circuit configured to extract a characteristic of the acceleration signal; a comparison circuit configured to perform a comparison between the characteristic of the acceleration signal and a stored template to distinguish a walking state of the patient from a non-walking activity state of the patient; and a posture calibration circuit configured to use an orientation of the accelerometer in the walking state to perform a posture calibration of the acceleration signal of the accelerometer.