Title:
PHOTOELECTRIC SWITCH
Document Type and Number:
Japanese Patent JP2017072522
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a photoelectric switch that can correctly detect even such a workpiece that changes color among manufacturing lots while suppressing wrong detection.SOLUTION: A photoelectric switch comprises: matching degree calculation means that compares acquired color information with color information on a reference color to calculate a matching degree; detection signal generation means that compares the calculated matching degree with a predetermined detection determination threshold to conduct a workpiece determination; and reference color specification means that specifies a start reference color, additional reference color and interpolation reference color on the basis of a take-in instruction. The reference color specification means is configured to: specify color information acquired on the basis of a first take-in instruction as color information on the start reference color; specify color information acquired on the basis of a second take-in instruction as color information on the additional color reference color; and specify the interpolation reference color based on the start reference color and additional reference color. The detection signal generation means compares the highest matching degree out of a matching degree relative to the start reference color, a matching degree relative to the interpolation reference color, and a matching degree relative to the additional reference color with the detection determination threshold to conduct a workpiece determination.SELECTED DRAWING: Figure 4
Inventors:
TSUKIKI SHINICHI
Application Number:
JP2015200555A
Publication Date:
April 13, 2017
Filing Date:
October 08, 2015
Export Citation:
Assignee:
KEYENCE CO LTD
International Classes:
G01J3/46; H01H35/00; H03K17/78
Domestic Patent References:
| JP2005127869A | 2005-05-19 | |||
| JP2001333290A | 2001-11-30 | |||
| JPH04301530A | 1992-10-26 | |||
| JPH11326055A | 1999-11-26 | |||
| JP2012020130A | 2012-02-02 |
Foreign References:
| WO2013002349A1 | 2013-01-03 | |||
| US5021645A | 1991-06-04 | |||
| US6901163B1 | 2005-05-31 |
Attorney, Agent or Firm:
Satoshi Otsuki
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