• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.2150-2151
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• 2011

본 논문에서는 분전반 내에서 전기화재가 발생할 경우 화염전파와 연기화염의 전파 특성, 연기의 진행방향, CO가스농도의 위치, 내부 온도분포 등을 통해 전기화재의 사전예방과 화재대응 운영시스템 등에 활용하고자 수치해석 등의 시뮬레이션을 수행하였다. 시뮬레이션 결과 화재가 발생한 경우 온도보다 CO가스가 분전반 상부에 빠르게 전달됨을 확인하였고, 시뮬레이션 결과는 분전반 화재예방을 위한 센서의 선택과 설치위치 선정 등에 활용될 것이다.

• Annual Conference of KIPS
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• 2023.11a
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• pp.652-655
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• 2023

우리나라에서는 지난 10년간 매년 4만 건 내외의 화재가 발생하여 많은 인명 피해와 경제적 손실이 발생하고 있다. 화재가 발생했을 때는 화재를 신속히 진압하여 인명 피해와 경제적 손실을 최소화하여야 한다. 또한, 화재 사고를 예방하기 위해 화재의 발화 원인이 무엇인지 알아내야 한다. 기존의 화재 경보 시스템에서는 온도, 연기, 불꽃 센서 등으로 화재를 감지하였으나 오경보나 화재를 인식하지 못하는 문제, 화재 원인을 구분하지 못하는 문제 등이 있었다. 또한, 사람이 화재 발생을 인지하기까지 시간이 많이 소요될 수 있고 부재로 인해 화재 상황인식이 늦어질 수도 있는 문제가 있었다. 이러한 문제를 해결하기 위해 본 논문에서는 GCN(Graph Convolutional Network) 모델을 이용하여 화재 상황에서의 복합 센서 상황을 학습해서 실제 화재 사고가 발생했을 때 화재의 원인을 구분할 수 있는 모델을 제안한다.

• Korean Journal of Remote Sensing
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• v.39 no.3
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• pp.283-295
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• 2023

With the development of sensor and satellite technology, numerous high-resolution and multi-spectral satellite images have been available. Due to their wavelength-dependent reflection, transmission, and scattering characteristics, multi-spectral satellite images can provide complementary information for earth observation. In particular, the short-wave infrared (SWIR) band can penetrate certain types of atmospheric aerosols from the benefit of the reduced Rayleigh scattering effect, which allows for a clearer view and more detailed information to be captured from hazed surfaces compared to the visible band. In this study, we proposed a multi-resolution transform-based image fusion method to combine visible and SWIR satellite images. The purpose of the fusion method is to generate a single integrated image that incorporates complementary information such as detailed background information from the visible band and land cover information in the haze region from the SWIR band. For this purpose, this study applied the Laplacian pyramid-based multi-resolution transform method, which is a representative image decomposition approach for image fusion. Additionally, we modified the multiresolution fusion method by combining a haze-guided weight map based on the prior knowledge that SWIR bands contain more information in pixels from the haze region. The proposed method was validated using very high-resolution satellite images from Worldview-3, containing multi-spectral visible and SWIR bands. The experimental data including hazed areas with limited visibility caused by smoke from wildfires was utilized to validate the penetration properties of the proposed fusion method. Both quantitative and visual evaluations were conducted using image quality assessment indices. The results showed that the bright features from the SWIR bands in the hazed areas were successfully fused into the integrated feature maps without any loss of detailed information from the visible bands.

• 한국HCI학회:학술대회논문집
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• 2008.02a
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• pp.534-539
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• 2008

This paper is about intelligent hexapod robot for the support walking of the aged person. The robot using various sensors and small camera has various abilities of forward backward walking, turing left or right, control the speed of walking, avoiding the obstacles and detecting risky situation of fire or gas. To let the aged feel soft and safe walking, we used special servo motor and developed hexapod walking mechanism and effective algorithm.

• Journal of Korea Multimedia Society
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• v.12 no.10
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• pp.1478-1485
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• 2009

A sensor network which is composed of a large number of sensors that perform various sensing is applied in a variety of fields. The sensor networks can be widely used for various application area like as home automation, fire detection and security area. Development of new sensor to have appropriate functions and deployment of networks for suitable application are served actively. In this paper, we design and implement a system that monitors various factory facilities by deploying sensor network at a working place which threatens the worker's safety. A sensor node reports its sensing data like as temperature and humidity to monitor facilities to a sink node. And the server which is connect to the sink node gathers and provides information by user interface. In addition, digital data which are generated at a work place can be transferred via the sensor network to increase the efficiency of works. The proposed sensor network provides the convenience of working, since it is deployed at a garbage collection company to monitor a temperature and humidity of garbage and to transmit data about the weight of trucks which enters the company.

• Defense and Technology
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• no.11 s.297
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• pp.56-61
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• 2003

Longbow Apache의 밀리미터파 사통 레이더는 최첨단의 광학 체계조차 장님으로 만드는 연기와 날씨도 침투한다. 애초에 특수 작전용 Black Hawk와 Chinook에 탑재된 통합 RF Countermeasures는 대공 레이더를 식별하고 위치확인 후 교란한다. IDM(Improved Data Modem), 내장된 GPS 관성 항법장치 그리고 초지평선 HF 무전기가 헬기편대에 포함되서 미래전투체계(FCS)와 UAV(Unmanned Aerial Vehicle)의 정보를 실시간으로 이용할 수 있게 한다. 게다가 AWACS와 JSTARS같은 공군의 공중 레이더, 혹은 해군의 네트워크 중심의 전장 공간 같은 데 있는 해상 센서를 통해 전체적으로 파악된 영상까지도 가능하게 될 것이다.

• Annual Conference of KIPS
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• 2017.11a
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• pp.1267-1270
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• 2017

이 논문에서는 라즈베리파이카메라를 이용하여 실내 흡연감지를 실시간으로 모니터링하는 시스템을 제안한다. 기존에 라즈베리파이에 가스센서를 SPI 통신으로 연결하여 실외 흡연감지 기능을 제공하는 시스템에 대한 연구가 진행되었다. 그러나 기존의 시스템은 부정확한 센서 값의 원인과 흡연이 감지되어도 흡연자를 조치하는 부분에 대한 문제점이 있다. 이 논문에서 제안하는 것은 연기센서, 가스센서를 시리얼통신으로 연결하여 공공장소 실내 흡연여부를 판단해 라즈베리파이카메라를 사용하여 실시간으로 흡연감지 하는 시스템을 제안한다. 이 논문에서 제안 시스템은 공공장소에서 실내흡연을 감지하고 이미지조회기능으로 보다 더 신뢰성있는 흡연감지 시스템에 대해 기대된다.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.13 no.4
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• pp.221-227
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• 2013

In this paper, zero-energy house in order to monitor the energy savings come with Zigbee communication temperature humidity, smoke detection, illumination and CO2 to develop complex sensor board a protocol for handling about it dealt. In particular, indoor space to mount the sensor based on the location of the control algorithm, so it varies through the Zigbee wireless sensor mounting position is free, and the advantage of being able to change. Also, the energy loss that occurs through the window can be reduced to the room lighting can play an important role in the control system.

• Fire Science and Engineering
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• v.11 no.2
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• pp.45-53
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• 1997

In this article, the Fuzzy Logic as the principle of the multcriteria fire detector is used to determine whether the fire takes out or not. The main contents of this method as follow; most of all, the degree of the fire is represented as the type of the Fuzzy, and then it is possible to examine whether the fire takes out or not by the principle of the Fuzzy Logic. The input fators of the Fuzzy fire detector are temperature sensor, smoke sensor, light sensor applied to digital type. On the result of this study, the first, the number of the case of the nonfire alarm which is represented in the existing fire detector is reduced, and the second, the applicability of the fuzzy detector is demonstrated by the test.

• The Journal of the Korea institute of electronic communication sciences
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• v.16 no.6
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• pp.1019-1028
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• 2021

Emergency exit guidance lights were designed and manufactured to quickly determine the location of the emergency exit in the event of a fire using a gas sensor, an illumination sensor, a temperature sensor, an Arduino Uno, and a Bluetooth module. This research was designed such that, when a fire breaks out, a red arrow appears as the illuminance value is low and a green arrow as the illuminance value is high to improve visibility when detecting high temperature and smoke. In addition, it is designed to prevent more serious conflagration by applying an alarm sound and text transmission algorithm using a communication module to transmit text messages indicating a 174Hz alarm sound and a fire location to prevent more serious conflagration.