Determination of Target Value under Automatic Vision Inspection Systems

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Journal of Korean Society for Quality Management > Volume 29(3); 2001 > Article

Journal of Korean Society for Quality Management 2001;29(3): 66-.

자동시각검사환경하에서 공정 목표치의 설정

서순근, 이성재

동아대학교 산업시스템공학과

Determination of Target Value under Automatic Vision Inspection Systems

ABSTRACT

This paper deals with problem of determining process target value under automated visual inspection(AVI) system. Three independent error sources - digitizing error, illumination error, and positional error - which have a close relationship with the performance of the AVI system, are considered. Assuming that digitizing error is uniformly or normally distributed and illumination and positional errors are normally distributed, respectively, the distribution function for the error of measured lengths is derived when the length of a product is measured by the AVI system. Then, Optimal target values under two error models of AVI system are obtained by minimizing the total expected cost function which consists of give away, rework and penalty cost. To validate two process setting models, AVI system for drinks filling process is made up and test results are discussed.

Key Words: Automated Visual Inspection(AVI);AVI Error Distribution;Target Value;Cost Model;