Accelerometer integrity alert
First Claim
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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.
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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.
82 Citations
25 Claims
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1. A method, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method, comprising:
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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. - View Dependent Claims (11, 12)
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13. A medical device, comprising:
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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. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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22. A medical device, comprising:
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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. - View Dependent Claims (23, 24)
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25. 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:
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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.
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Specification