Accelerometer integrity alert

摘要

A medical device and associated method determine a signal amplitude of a sensor signal produced by a MEMS sensor, compare the signal amplitude to a stiction detection condition, detect stiction of the MEMS sensor in response to the signal amplitude meeting the stiction detection condition, and automatically provide a corrective action in response to detecting the stiction.

主权项

1. A method, comprising:
applying a normal input signal to a micro-electrical mechanical systems (MEMS) sensor to enable the MEMS sensor to function in a normal operating state of producing a time-varying sensor signal that is correlated to physical motion that is imposed on the sensor, wherein the normal input signal is configured not to cause motion of the MEMS sensor; determining by a control module of a medical device a signal amplitude of the sensor signal produced by the MEMS sensor enabled by the normal input signal; comparing the signal amplitude to a stiction detection condition; detecting stiction of the MEMS sensor in response to the signal amplitude meeting the stiction detection condition; and automatically providing a corrective action in response to detecting the stiction.