【摘要】 建立了线路板(PCB)测试中变形对应的二维图形变换模型,使用正态和W e ibu ll分布统计模型处理数据,成功用于针床式在线测试仪(B ed-of-na ils T esting F ix ture)可靠性定量评估,并由定量实测结果分析了针床测试仪对准误差的类型、大小及产生原因。更多还原

【Abstract】 A systematic,accurate and robust evaluating method is developed for printed circuit board(PCB) positioning assessment in bed-of-nails fixtures.Actual deformation of PCB is obtained based upon a reasonable mode.The combined accuracy and cause of the test lands positioning were estimated by Gaussian and Weibull distributions.Results will be helpful for reliability analysis of a bed-of-nails test fixture.更多还原