Patent ID: 9341566
Filing Date: 2016-05-17
CPC Classification: B29B,G01N,Y02W

Claim Text:
1. A resin type identification method for identifying a resin type of resin pieces conveyed in succession to a measurement range by having a controller execute signal processing on the basis of time-series signal powers corresponding to infrared reflection intensities obtained by emitting infrared light onto said measurement range at predetermined time intervals, said controller implementing: a selection step of selecting at least one identifying signal power for identifying the resin type of said resin pieces from said time-series signal powers corresponding to measurement position of said each resin piece conveyed in succession, on the basis of respective magnitudes of said time-series signal powers, the selection step selecting the at least one signal power within a predetermined threshold range defined in advance as said identifying signal power from said time-series signal powers corresponding to the measurement position of said each resin piece conveyed in succession; and an identification step of identifying the resin type of said resin pieces on the basis of an infrared reflection spectrum corresponding to said selected identifying signal power in the predetermined threshold range defined in advance.