1. Date of download: 12/22/2017
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From: Online Real-Time Quality Monitoring in Additive Manufacturing Processes Using Heterogeneous Sensors
J. Manuf. Sci. Eng. 2015;137(6): doi: /
Figure Legend:
(Top) The three observed process states in FFF, demarcated as normal, abnormal, and failure. (Bottom) The transition between normal, abnormal, and failure states is prominently evident from the time series pattern of the noncontact IR temperature sensor.