Device and method for inspecting piston ring

Details Device and method for inspecting piston ring Device and method for inspecting piston ring

2008-03-18

2008-03-18

Luu, Thanh X. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

With circuit for evaluating a web, strand, strip, or sheet

C250S559360, C250S559370, C029S222000

Reexamination Certificate

active

10559450

ABSTRACT:
A piston-ring inspecting device includes a sensor unit (27) including a light emitting system (27a) that emits slit-like detection light toward an outer peripheral surface (Ps) of a piston (P) and an outer peripheral surface (2c) of a piston ring (2) and a light receiving image system (27b) that receives light reflected from the outer peripheral surfaces so as to form an image; an image calculating means that subjects image information obtained by the sensor unit to numerical processing and that calculates a tilt angle of the outer peripheral surface of the piston ring with respect to the outer peripheral surface of the piston; and a controller (30) including a judgment means that, based on arithmetical information obtained by the image calculating means and preset standard information, judges whether or not the piston ring has been fitted in a predetermined direction. Accordingly, an inspection can be performed without scanning, through a simple analysis process, in a short time, and with high accuracy.

REFERENCES:
patent: 4379234 (1983-04-01), Cruz
patent: 2004/0194296 (2004-10-01), Kosuge
patent: 8202776 (1983-04-01), None
patent: 2 099 142 (1982-12-01), None
patent: 57-194837 (1982-11-01), None
patent: 4-268486 (1992-09-01), None
patent: 2002-357408 (2002-12-01), None

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