Comparison of image edge detection methods for intruder detection in a phase-sensitive OTDR system

Záviška, Pavel; Dejdar, Petr; Münster, Petr

doi:10.1109/icumt54235.2021.9631677

Cited by 1 publication

(1 citation statement)

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“…This article, which is an extended version of the conference paper [9], aims to present a distributed fiber optic sensing system based on Φ-OTDR, which has a sufficient spatial resolution, comparison of selected methods used for signal processing, and the results from real testbed measurement. A typical back-reflected signal from a fiber (one period of the reflected signal) from measurement by the Φ-OTDR system is shown in Figure 1a.…”

Section: Introductionmentioning

confidence: 99%

Image Edge Detection Methods in Perimeter Security Systems Using Distributed Fiber Optical Sensing

Dejdar

Záviška

Valach

et al. 2022

Sensors

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This paper aims to evaluate detection algorithms for perimeter security systems based on phase-sensitive optical time-domain reflectometry (Φ-OTDR). Our own designed and developed sensor system was used for the measurement. The main application of the system is in the area the perimeter fencing intrusion detection. The system is unique thanks to the developed motherboard, which contains a field-programmable gate array (FPGA) that takes care of signal processing. This allows the entire system to be integrated into a 1U rack chassis. A polygon containing two different fence types and also cable laid underground in a plastic tube was used for testing. Edge detection algorithms using the Sobel and Prewitt operators are considered for post-processing. The comparison is made based on the signal-to-noise ratio (SNR) values calculated for each event. Results of algorithms based on edge detection methods are compared with the conventional differential method commonly used in Φ-OTDR systems.

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Section: Introductionmentioning

confidence: 99%