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Integrated sensor network methods and systems

  • US 10,188,295 B2
  • Filed: 06/01/2010
  • Issued: 01/29/2019
  • Est. Priority Date: 06/01/2009
  • Status: Active Grant
First Claim
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1. A method comprising:

  • processing sensor data from a plurality of motion sensors and a bed sensor deployed in a living unit for a first time period to establish a frame of reference for an activity pattern by a person residing in the living unit, wherein the activity pattern frame of reference represents a health condition of a person residing in the living unit, wherein the processed sensor data for the first time period comprises a plurality of data values corresponding to a plurality of subintervals within the first time period, wherein each subinterval data value represents (1) a total number of sensor hits during that subinterval of the first time period or (2) a total time for sensor firings during that subinterval of the first time period, and wherein the activity pattern frame of reference comprises a statistical value about the subinterval data values over the first time period;

    computing a standard deviation for the processed sensor data over the first time period based on the subinterval data values;

    defining a statistical parameter threshold, wherein the statistical parameter threshold comprises a defined number of the standard deviations;

    processing additional sensor data from the plurality of motion sensors and the bed sensor deployed in the living unit for a second time period, the second time period occurring after the first time period;

    computing a value for the activity pattern for the second time period based on the processed additional sensor data, the computed activity pattern value of the second time period also representing a health condition of the person, wherein the computed activity pattern value comprises (1) data about a total number of sensor hits during the second time period if the activity pattern frame of reference is based on the total number of sensor hits during the first time period or (2) data about a total time for sensor firings during the second time period if the activity pattern frame of reference is based on the total time for sensor firings during the first time period;

    comparing the computed activity pattern value with the activity pattern frame of reference and the defined statistical parameter threshold to determine whether the computed activity pattern value deviates from the activity pattern frame of reference by more than the defined number of the standard deviations;

    generating an alert based on a determination that the computed activity pattern value deviates from the activity pattern frame of reference by more than the defined number of standard deviations;

    receiving a feedback response to the alert, the feedback response including feedback regarding clinical relevance of the alert; and

    adjusting the defined number of the standard deviations for the statistical parameter threshold to a different defined number of the standard deviations based on the feedback response to the alert.

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