Real time crack detection using mountable comparative vacuum monitoring sensors
Real time crack detection using mountable comparative vacuum monitoring sensors
复制标题
DOI：
10.12989/sss.2009.5.4.317
复制
发表时间：
2009-07-01
影响因子：
3.5
通讯作者：
Roach, D.
中科院分区：
文献类型：
--
作者：
Roach, D.
目前对各种结构的维护操作和完整性检查需要人员进入通常无法进入或危险的区域进行必要的无损检查。为了获得这些检查的权限，必须拆卸和拆除结构，或者必须将人员运送到偏远地区。原位传感器的使用，再加上远程探测，可以克服无数的检查障碍，这些障碍来自于可达性限制、复杂的几何形状、隐藏损伤的位置和深度，以及结构的孤立位置。此外，如果使用机载健康监测系统更定期地评估结构完整性，可以提高对意外缺陷生长和结构破坏的预防。一项研究计划已经完成，以开发和验证比较真空监测（CVM）传感器的表面裂纹检测。采用单侧公差区间的统计方法，推导了多种应用场景下的检测概率（POD）水平。还进行了多年的现场试验，研究了CVM传感器在飞机上的部署和长期运行。本文介绍了CVM传感器的定量裂纹检测能力，在实际飞行环境中的性能，以及在飞机和其他民用结构结构健康监测中的应用前景。
Current maintenance operations and integrity checks on a wide array of structures require personnel entry into normally-inaccessible or hazardous areas to perform necessary nondestructive inspections. To gain access for these inspections, structure must be disassembled and removed or personnel must be transported to remote locations. The use of in-situ sensors, coupled with remote interrogation, can be employed to overcome a myriad of inspection impediments stemming from accessibility limitations, complex geometries, the location and depth of hidden damage, and the isolated location of the structure. Furthermore, prevention of unexpected flaw growth and structural failure could be improved if on-board health monitoring systems were used to more regularly assess structural integrity. A research program has been completed to develop and validate Comparative Vacuum Monitoring (CVM) Sensors for surface crack detection. Statistical methods using one-sided tolerance intervals were employed to derive Probability of Detection (POD) levels for a wide array of application scenarios. Multi-year field tests were also conducted to study the deployment and long-term operation of CVM sensors on aircraft. This paper presents the quantitative crack detection capabilities of the CVM sensor, its performance in actual flight environments, and the prospects for structural health monitoring applications on aircraft and other civil structures.