Reliability Analysis of Degradation Data Based on Accelerated Model -With Photointerrupter Used in Home VCR(Video Cassette Recorder)-

가속 모델에 기초한 열화 데이터의 신뢰성 해석 -가정용 영상 재생기에 사용되는 광센서를 중심으로-

Accelerated degradation is concerned with models and data analyses for degradation of product performance over time at overstress and design conditions. Although there have been numerous studies with accelerated degradation theory in reliability, very few actually apply to parametric statistical analyses. This paper shows how to analyze degradation data, provides tests for how well the assumptions hold. Reel sensors, a sort of photointerrupters in home VCR, hive been tested, and least-square analyses are used to illustrate our approach. Tests for linearity of the performance-time relationship, dependence of the lognormal distribution, and the standard deviation on time are performed. The mean life of tested sensors is assessed at about 414,000 hours, and the Arrhenius activation energy of this reaction is concluded to be 0.39 eV as results.