预防维修与质量控制常常需要始终监视零件磨损情况。这样,对大型机械系统至少提出两个问题:或者必须把系统分解成许多零件,或者必须用有关的实验分析来表示磨屑的特征。所以,监测磨损情况往往不太方便,而且可能需要补充工序,以保证获得所测的磨损量。 Preventive maintenance and quality control often require constant monitoring of part wear. Thus, at least two problems are raised with large mechanical systems: the system must either be decomposed into many parts or the relevant experimental analysis must be used to characterize the debris. Therefore, it is often not easy to monitor wear and tear, and additional work steps may be required to ensure that the amount of wear measured is obtained.