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Event-based data collection for smart sensors on a master/slave bus

  • US 10,078,955 B1
  • Filed: 06/15/2017
  • Issued: 09/18/2018
  • Est. Priority Date: 06/15/2017
  • Status: Active Grant
First Claim
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1. A method of collecting data in a system that includes a master controller and a plurality of slave sensors connected to communicate digital data via a master/slave data bus, the method comprising:

  • commanding, by the master controller over the master/slave data bus, the plurality of slave sensors to enter an event monitoring state, wherein each of the plurality of slave sensors enter a listening mode;

    sensing, by the plurality of slave sensors, characteristics of an environment as first sensed data;

    digitizing and retaining, by the plurality of slave sensors, the first sensed data during the listening mode;

    detecting, by a first one of the plurality of slave sensors, a detected event based upon the first sensed data;

    driving, by the first one of the plurality of slave sensors in response to the detected event, an event trigger on the master/slave data bus, wherein the event trigger is a known logic state or pattern on the master/slave data bus;

    detecting, by the plurality of slave sensors, the event trigger on the master/slave data bus;

    sensing, by the plurality of slave sensors, the characteristics of the environment as second sensed data;

    recording, by the plurality of slave sensors, the second sensed data as event data in response to detection of the event trigger on the master/slave data bus; and

    returning, by the first one of the plurality of slave sensors, to the listening mode following recording event data, unless a duration associated with the event monitoring state has expired or the master controller has commanded the first one of the plurality of slave sensors to exit the event monitoring state.

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