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OPTICAL MANUFACTURING PROCESS SENSING AND STATUS INDICATION SYSTEM

  • US 20170016781A1
  • Filed: 09/26/2016
  • Published: 01/19/2017
  • Est. Priority Date: 03/26/2014
  • Status: Active Grant
First Claim
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1. A manufacturing process sensing and status indication system comprising:

  • (a) one or more optical sensors configured to measure the optical emissions from the manufacturing process over a range of wavelengths from 200 nanometers to 1000 nanometers, and produce time-domain optical data;

    (b) one or more thermal sensors configured to measure thermal phenomena at two different characteristic timescales, a first timescale associated with the application of heat into the manufacturing process by an external heat source and a second timescale associated with the material response to the application of heat within the manufacturing process by the external heat source, and produce time-domain thermal data;

    (c) an analysis system configured to provide(c1) a first feature extraction process that extracts, from the time domain optical and thermal data, features that are related to the heating rate, cooling rate and peak temperature of the thermal cycles associated with the application of heat into the manufacturing process by an external heat source;

    (c2) a second feature extraction process that extracts, from the time domain optical and thermal data, features that are related to the heating rate, cooling rate and peak temperature of the thermal cycle associated with the material response to the external heat input to the manufacturing process;

    (c3) a classification process that, from the features extracted by the first and second feature extraction processes, distinguishes features associated with a baseline or nominal operating condition from features associated with a deviant or off-nominal process condition;

    (d) a status indicator that is configured to communicate the results of the classification process at a given instant in time to a human-machine interface.

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