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`CLAIMS
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`WHAT IS CLAIMED IS:
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`1.
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`A portable electronic device, comprising:
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`a housing having an internal cavity;
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`a structure that separates the internal cavity from an environment external to the
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`housing; the structure comprising an opening;
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`an air-permeable; liquid-resistant cover over the opening; and
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`a sensor; integrated with the cover; and configured to detect an occlusion of the
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`opening.
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`2.
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`The portable electronic device of claim 1; wherein the structure comprises a
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`portion of the housing.
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`3.
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`The portable electronic device of claim 1; wherein the structure comprises a wall
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`within the housing that separates the internal cavity from another cavity that is located within the
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`housing and adjacent to an opening in the housing.
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`4.
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`The portable electronic device of claim 1; wherein the sensor comprises at least
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`one conductive trace on the cover that extends across the opening in the structure.
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`5.
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`The portable electronic device of claim 1; wherein the sensor comprises at least
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`one conductive thread woven into the cover.
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`6.
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`The portable electronic device of claim 1; wherein the cover comprises a
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`conductive polymer material and forms at least a portion of the sensor.
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`7.
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`The portable electronic device of claim 1; wherein the sensor comprises a
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`conductive plate that is capacitively coupled to the cover.
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`-17-
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`Attorney Docket No. 122202-5654 (P3 5420USl)
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`8.
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`The portable electronic device of claim 1, further comprising an occlusion
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`mitigation component operable to mitigate the occlusion of the opening responsive to the
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`detection of the occlusion by the sensor.
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`9.
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`The portable electronic device of claim 8, wherein the sensor and the occlusion
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`mitigation component each comprises resistive conductive structures on or within the cover.
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`10.
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`The portable electronic device of claim 8, wherein the occlusion mitigation
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`component comprises a vibratory component that is directly mechanically coupled to the cover.
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`11.
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`The portable electronic device of claim 10, wherein the vibratory component
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`comprises an ultrasonic piezoelectric water vaporizer.
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`12.
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`The portable electronic device of claim 8, wherein the occlusion mitigation
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`component comprises an infrared heater.
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`13.
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`A portable electronic device, comprising:
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`a housing having an internal cavity, and
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`an intelligent barometric vent that separates the internal cavity from an
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`environment external to the housing, wherein the intelligent barometric vent comprises an
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`opening and a sensor to detect an occlusion of the opening.
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`14.
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`The portable electronic device of claim 13, wherein the sensor comprises a
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`conductive structure that extends across the opening and is conductively coupled to occlusion
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`detection circuitry within the housing.
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`15.
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`The portable electronic device of claim 14, wherein the occlusion detection
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`circuitry is configured to sense a change in conductivity of the conductive structure due to
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`contact with an occluding liquid, and wherein the device further comprises occlusion mitigation
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`circuitry configured to drive a current through the conductive structure to heat the conductive
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`structure to encourage evaporation of the occluding liquid.
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`-18-
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`
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`Attorney Docket No. 122202-5654 (P3 5420USl)
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`16.
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`The portable electronic device of claim 13, further comprising an occlusion
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`mitigation component operable to remove at least some of the detected occlusion.
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`17.
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`The portable electronic device of claim 13, wherein the intelligent barometric vent
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`comprises a water-resistant cover that prevents ingress of moisture from the environment
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`external to the housing into the internal cavity.
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`18.
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`The portable electronic device of claim 17, further comprising a battery and a
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`main logic board disposed in the internal cavity.
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`19.
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`A method, comprising:
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`detecting an occlusion of an opening in a structure of a portable electronic device
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`using a cover-integrated sensor associated with a cover for the opening,
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`wherein the structure comprises a portion of a barometric vent disposed between a
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`cavity within the device and an external environment.
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`20.
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`The method of claim 19, further comprising:
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`operating an occlusion mitigation component, responsive to the detection by the
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`cover-integrated sensor, to at least partially remove the detected occlusion.
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`-19-
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