| 周 明,黄新敬,郭 霖,曾周末.悬跨管道弯曲度检测特征提取方法研究[J].电子测量与仪器学报,2021,35(8):135-141 |
| 悬跨管道弯曲度检测特征提取方法研究 |
| Research on feature extraction method for curvednessdetection of spanning pipeline |
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| DOI： |
| 中文关键词: 海底管道 悬跨 弯曲检测 |
| 英文关键词:subsea pipeline spanning bend detection |
| 基金项目: |
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| 摘要点击次数: 345 |
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| 中文摘要: |
| 悬跨弯曲严重威胁着海底管道安全,可以使用不易卡堵、收发便捷的球形内检测器开展准实时检测。 通过在球形内检
测器内合理布置加速计及其质量分布,实现了球形内检测器在管道内的定轴转动,建立了加速度计的精确输出模型,实现了对
加速度交流分量频率和直流分量的提取,用于指征管道向下弯曲。 通过峰值检测或连续小波变换从加速度数据中提取直流分
量,可以实现对管道弯曲的高灵敏检测。 若加速度频谱特征峰为单峰,则管道没有发生悬跨弯曲;若特征峰存在展宽现象,则管
道发生了悬跨弯曲。 对于 12 m 的管道,弯曲检测分辨率可以达到 1 cm。 |
| 英文摘要: |
| Bend due to spanning seriously threatens the safety of subsea pipelines. Quasi-real-time detection of pipeline spanning can be
achieved by using spherical detectors ( SDs) with low blockage risk and convenient launch / retrieve procedures. In this paper, via
rationally arranging the accelerometer and mass distribution, the fixed-axis rotation of the SD is realized, the accurate output model of the
accelerometer is formulated, and the AC component’s frequency and DC component of the recorded acceleration are accurately extracted
and then used to indicate the downward bend of the spanning pipeline. By extracting the DC component from the acceleration data
through peak detection or continuous wavelet transform, high-sensitivity detection of pipeline bend can be achieved. If the characteristic
peak of the acceleration spectrum is a single peak, the pipeline has no bend; if the characteristic peak has a broadening phenomenon,
the pipeline has bend. For a 12 m pipe, the bend detection resolution can reach 1 cm. |
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