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US 9,522,276 B2Granted
Accelerometer integrity alert
AssigneeMedtronic, Inc.
InventorsXiaonan Shen, Nathan A Grenz, Robert D Musto, David L Palkert, Jonathan P Roberts, James D Reinke, Paul R Solheim
Life of this patent
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Abstract
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.
Claims25
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.
3 more elements
A method, comprising:
- determining by a control module of a medical device a signal amplitude of a sensor signal produced by a micro-electrical mechanical systems (MEMS) sensor;
- 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;
- acquiring the sensor signal over an analysis interval;
- detecting motion in response to the sensor signal acquired over the analysis interval;
- withholding the comparing of the signal amplitude to the stiction detection condition in response to the motion being detected;
- and
- automatically providing a corrective action in response to detecting the stiction.
5 more elements
A medical device, comprising:
- a micro-electrical mechanical system (MEMS) sensor configured to produce a sensor signal correlated to motion of the medical device;
- and
- a control module configured to:
- apply a normal input signal to the MEMS sensor to enable the MEMS sensor to function in a normal operating state of producing the sensor signal as a time-varying 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;
- determine a signal amplitude of the sensor signal;
- 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
- provide a corrective action in response to detecting the stiction.
6 more elements
A medical device, comprising:
- a micro-electrical mechanical system (MEMS) sensor configured to produce a sensor signal correlated to motion of the medical device;
- and
- a control module configured to:
- determine a signal amplitude of the sensor signal;
- 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;
- acquire the sensor signal over an analysis interval;
- detect motion in response to the sensor signal acquired over the analysis interval;
- withhold the comparing of the signal amplitude to the stiction detection condition in response to the motion being detected;
- and
- provide a corrective action in response to detecting the stiction.
8 more elements
A non-transitory computer readable storage medium comprising a set of instructions that, when executed by a control module of a medical device comprising a micro-electrical mechanical system (MEMS) sensor, cause the device to:
- apply a normal input signal to the 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;
- determine a signal amplitude of a sensor signal produced by the 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
- provide a corrective action in response to detecting the stiction.
3 more elements
Dependencies are inferred from the claim text.