刘浩,贺福强.基于正态分布下视觉检测元器件的寿命预测[J].电测与仪表,2021,58(5):164-167. Lliu Hao,He Fuqiang.Life prediction of visual inspection components based on normal distribution[J].Electrical Measurement & Instrumentation,2021,58(5):164-167.
基于正态分布下视觉检测元器件的寿命预测
Life prediction of visual inspection components based on normal distribution
n view of the testing of the lifetime of electronic components in visual inspection system, it is found that the increase of temperature will directly affect its life. When the system works, it cannot effectively grasp the long life of components, which will seriously affect the normal operation of the system. Therefore, a method of rapid failure of components by changing the temperature stress constant is proposed in this paper. The estimation of mean and variance under different stress levels under normal distribution are obtained by point estimation, which can predict the variation law of components under stress and select acceleration model to fit. Hypothesis testing method, comparison test method and test data are used to verify the hypothesis and accelerate the model. The experimental results show that the acceleration model has high accuracy and can effectively predict the lifetime of electronic components under different temperature stress levels. This method can shorten the life test time and improve the test efficiency, which makes it possible to predict and evaluate the life of long-life components. It also provides a theoretical basis for evaluating the life prediction of components under normal temperature stress.
