管道内检测器性能规格验证方法

Performance verification methods for pipeline inner detectors

管道内检测器性能规格直接决定着管道本体隐患是否能够被系统地识别出来,也是管道运营企业根据自身管道情况选择适宜检测器需要考虑的关键因素。通过对管道内检测器的检出率(POD)、识别率(POI)、误报率(POFC)、采样频率、定位精度、检出缺陷类型及其阈值、缺陷尺寸量化精度,以及抗外界干扰能力(如管道内壁清洁度、流速和温度影响)等性能规格关键指标的分析,提出了开挖验证和牵引试验验证管道内检测器性能规格的方法,建立了管道内检测器性能规格关键指标的计算方法,为管道运营商实现基于风险的检测提供了选择检测器类型和性能指标判定的依据。

Performance of pipeline inner detectors directly determines if potential problems in the pipeline can be identified, but also serves as the key factor in selection of the most suitable detectors depending on specific conditions of the concerned pipeline. In this paper, key performance indicators of the pipeline inner detector, including probability of detection（POD）, probability of identification（POI）, probability of false calls（POFC）, sampling frequency, positioning accuracy, defect types and their detection thresholds, quantitative accuracy of defect sizes and anti-disturbance ability（such as the pipeline inner wall cleanliness, the influence of flow velocity, temperature and so on）, are analyzed, excavation and traction tests are proposed as techniques for verification of performances of pipeline inner detectors, and calculation methods for key performance indicators of the detectors are established. All these provide valuable references for pipeline operators in selecting suitable detector types and desirable performances for risk-based inspections.