【摘要】 尘土污染是造成连接器电接触故障的主要原因之一。为进行尘土条件下电接触可靠性评定,设计尘土自然沉积实验,得到尘土沉积密度的时间曲线。以洁净样片200次电阻测试的最大值作为压着尘土颗粒的判据,得到压着概率达到90%以上的危险尘土密度临界值为每平方毫米300个。最后对压着概率和尘土密度进行曲线拟合,得到拟合效果较好的几种函数形式,分析认为四次多项式和幂函数拟合是最符合要求的。更多还原

【Abstract】 Dust is one of the factors causing electric contact failures.For evaluating the reliability of electric contact in dusty environment,a deposition experiment was performed and the time curve of dust deposition density was obtained.Base on the experimental results,the criterion was given from the maximum of 200 dust tests on clean materials,and inserted probability of the dust was available.300 particles per square millimeter were gotten as the hazardous dust density that the inserted probability reached above 90 percent.Furthermore,the curve fitting analysis of the inserted probability and dust density were discussed.The fitting result shows that some functions are better forms,but the fourth polynomial and power function are the best through analysis.更多还原