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상수도 배관에서 두 지점의 동시 누수에 따른 신호특징 분석
이영섭,Lee, Young-Sup 한국비파괴검사학회 2015 한국비파괴검사학회지 Vol.15 No.1
스마트 워터 그리드와 같은 지하매설 상수도 배관망을 구성할 때 누수 지점에 대한 지능적 탐지는 중요한 요소이다. 이런 지능형 배관망의 구성에는 많은 수의 누수탐지센서를 일정한 간격으로 설치하는 것이 필요하며 이들 센서에서 계측되는 신호를 분석해서 누수 유무 및 누수발생시 그 지점의 추정을 신속히 할 수 있어야 한다. 그래서 본 연구에서는 특히 두 지점에서 동시에 누수가 발생하는 경우에 대해 그 센서가 측정한 신호가 가지는 특성 및 두 누수지점 동시 추정 가능성을 심도있게 분석하였다. 즉, 센서간 거리가 315.6 m 인 100A 사이즈의 주철관 상수도 배관에 대해 두 지점 동시 누수시 각각의 개별 센서신호를 계측하였으며, 그 신호를 기반으로 주파수 특성 및 상호상관함수 등의 분석을 통해 두 지점의 누수탐지에 대해 기술하였다. Intelligent leak detection is an essential component of a underground water supply pipeline network such as a smart water grid system. In this network, numerous leak detection sensors are needed to cover all of the pipelines in a specific area installed at specific regular distances. It is also necessary to determine the existence of any leaks and estimate its location within a short time after it occurs. In this study, the leak signal properties and feasibility of leak location detection were investigated when concurrent leaks occurred at two points in a pipeline. The straight distance between the two leak sensors in the 100A sized cast-iron pipeline was 315.6 m, and their signals were measured with one leak and two concurrent leaks. Each leak location was described after analyzing the frequency properties and cross-correlation of the measured signals.
이영섭(Lee Young-sup) 가천대학교 아시아문화연구소 2009 아시아문화연구 Vol.17 No.-
It is not accidental that Kim Hyesun's female poetics orienting otherness of maternality appeared in Korean modern poetics. Kim Chunsu's "Cheoyong" and Kim Suyeong's "Onmom' poetics operate each other co-textually as the background of her Baridegi poetics. Kim Hyesun, who was searching for poetical reflection and engagement to overcome the absurdity of premodern culture, made Kim Chunsoo's ideology criticism through ontological solitude and Kim Suyeong's ontological trial through adventure of whole body her starting point of her new poetics. But she felt her ideological limit among man-poets' ontological studies with women alienated. It is Baridegi poetics that Kim Hyesun found out after she had felt keenly the necessity of female poetics building and female poetry settling. This Baridegi poetics shows acutely her new poetics and aesthetic experiment to cope with masculine politics and her reality recognition, by exposing the negative other side of women-alienated modern culture through the descending image to death. Her tragic Baradegi poetics evokes us the scream and pain from modem woman's frenzy body when her body is torn, trodden, and killed. Poetry of pain which alienated woman's body produces not only criticizes keenly distorted patriarch culture but also shows a desire for a new life culture balanced and harmonized with natural otherness by the maternality recovery.