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引用次数: 0
摘要
在光纤分布式振动传感器(Fiber Optic Distributed Vibration Sensor,FODVS)的长距离管道监测应用中,高能量的瞬时振动事件会在时空图中产生一对反V特征,为事件识别提供清晰的特征。本文提出了一种利用 FODVS 和手工创建的形态学对象检测算法的事件识别方法。采用相敏光学时域反射仪(φ-OTDR)作为分布式传感器,采集包含反V特征的实景时空图数据。利用带通滤波器和高斯模糊来抑制随机噪声并增强反 V 信号,然后提出了一种手工创建的形态学物体检测方法来识别反 V 模式。事实证明,所提出的方法能够准确捕捉时空图中的反转 V 特征。本文对手工创建的 FODVS 事件识别方案进行了概念验证的初步论证,该方案追求模型具有良好的可解释性和对不同环境的强大适应性。
A hand-crafted φ-OTDR event recognition method based on space-temporal graph and morphological object detection
In the long-range pipeline monitoring application of Fiber Optic Distributed Vibration Sensor (FODVS), instantaneous vibration event with high energy generates a pair of invert-V signature in the space-temporal graph, providing clear characteristic for event recognition. This paper proposed an event recognition method utilizing FODVS and hand-crafted morphological object detection algorithm. Phase-sensitive Optical Time Domain Reflectometer (φ-OTDR) was employed as the distributed sensor to collect the real field space-temporal graph data containing invert-V signature. Bandpass filter and Gaussian blur were utilized to suppress random noise and enhance the invert-V signature, then a hand-crafted morphological object detection method was proposed to recognize the invert-V pattern. The proposed method was proved to be able to accurately capture the invert-V signature in the space-temporal graph. This paper provided a concept-proof preliminary demonstration on the hand-crafted FODVS event recognition scheme for pursuing model with good interpretability and strong adaptability to varied environments.
期刊介绍:
Optics and Lasers in Engineering aims at providing an international forum for the interchange of information on the development of optical techniques and laser technology in engineering. Emphasis is placed on contributions targeted at the practical use of methods and devices, the development and enhancement of solutions and new theoretical concepts for experimental methods.
Optics and Lasers in Engineering reflects the main areas in which optical methods are being used and developed for an engineering environment. Manuscripts should offer clear evidence of novelty and significance. Papers focusing on parameter optimization or computational issues are not suitable. Similarly, papers focussed on an application rather than the optical method fall outside the journal''s scope. The scope of the journal is defined to include the following:
-Optical Metrology-
Optical Methods for 3D visualization and virtual engineering-
Optical Techniques for Microsystems-
Imaging, Microscopy and Adaptive Optics-
Computational Imaging-
Laser methods in manufacturing-
Integrated optical and photonic sensors-
Optics and Photonics in Life Science-
Hyperspectral and spectroscopic methods-
Infrared and Terahertz techniques