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Multi-mode sensor for surface orientation

  • US 10,317,200 B1
  • Filed: 09/23/2016
  • Issued: 06/11/2019
  • Est. Priority Date: 09/30/2015
  • Status: Active Grant
First Claim
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1. A wearable device comprising:

  • a wearable housing;

    first and second light emitters;

    first and second light detectors, wherein the first and second light emitters and the first and second light detectors are located within the housing and are each individually and independently controllable, each of the first and second light detectors associated with at least one of a set of emitter-detector pairs,the set of emitter-detector pairs comprising;

    a first emitter-detector pair comprising the first light emitter and the first light detector,a second emitter-detector pair comprising the first light emitter and the second light detector, anda third emitter-detector pair comprising the second light emitter and the first light detector pair,wherein the position of the emitter relative to the detector in each emitter-detector pair is predetermined; and

    a controller within the housing and in communication with the first and second light emitters and the first and second detectors, wherein the controller is configured to;

    select one or more of the set of emitter-detector pairs,activate the light emitter(s) of the one or more of the set emitter-detector pairs,acquire light data from the one or more emitter-detector pairs, anddetermine a relative z-distance and tilt angle of a housing surface to a surface of a user based on the light data from the one of more of the set of emitter-detector pairs.

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