CUSUM与休哈特控制图在路面施工质量控制中的应用

Application of CUSUM and Shewhart Control Chart in the Quality Control of Pavement Construction

沥青路面施工中广泛使用休哈特控制图来进行生产质量控制,结合实际生产过程的样本检测数据,将累积和(CUSUM)控制图与休哈特控制图中的均值控制图及方差控制图进行对比分析。结果表明:休哈特控制图对异常波动引起的瞬时的较大均值变异效果显著,但在持续性的小偏移检出上效果较差;而累积和控制图对于持续性的小偏移检出力更强,但无法有效检测非持续性偏移。基于以上结论,考虑在沥青路面施工质量控制过程中联合应用这两种控制图进行监控分析,将两种控制图的优势进行融合,检出效果明显优于其中的一种,可以尽快发现沥青路面生产过程中的异常波动。

Shewhart control chart is widely used in asphalt pavement construction for production quality control.Combined with the sample test data of the actual production process,the cumulative sum(CUSUM)control chart and the mean control chart and variance control chart in the Shewhart control chart are carried out comparative analysis shows that the Shewhart control chart has a significant effect on the instantaneous large mean value caused by abnormal fluctuations,but it is less effective in detecting continuous small deviations;while the cumulative sum control chart is effective for continuous small deviations.The shift detection power is stronger,but it cannot effectively detect the non-persistent shift.Based on the above conclusions,considering the joint application of these two control charts for monitoring and analysis in the process of asphalt pavement construction quality control,combining the advantages of the two control charts,the detection effect is significantly better than one of them,and the asphalt pavement can find abnormal fluctuations in the production process as soon as possible.