• 디지털산업정보학회논문지
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• 제13권2호
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• pp.77-85
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• 2017

Due to the expansion of accommodation space caused by increase of population along with lifestyle changes, most of people spend their time indoor except for the travel time. Because of this, environmental change of indoor is very important, and it affects people's health and economy in resources. But, most of people don't acknowledge the importance of indoor environment. Thus, monitoring system for sustaining and managing indoor environment systematically is needed, and big data clusters should be used in order to save and manage numerous sensor data collected from many spaces. In this paper, we design a big data cluster for the indoor environment monitoring in order to store the sensor data and monitor unit of the huge building Implementation design big data cluster-based system for the analysis, and a distributed file system and building a Hadoop, HBase for big data processing. Also, various sensor data is saved for collection, and effective indoor environment management and health enhancement through monitoring is expected.

• 한국정보통신학회논문지
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• 제17권9호
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• pp.2167-2173
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• 2013

최근 실내 공기오염으로부터 발생되는 많은 문제점에 대한 관심이 증가하고 있으며, 실내 환경정보를 측정하여 사용자에게 사전 조치를 취할 수 있는 시스템에 대한 필요성이 점차 증대되고 있다. 이와 관련하여 본 논문에서는 휴대용 단말기, 환경 센서를 이용하여 각종 실내 환경정보를 측정할 수 있는 근거리 무선통신을 이용한 실내 환경정보 모니터링 시스템을 설계하고 구현하였다. 제안하는 시스템은 사용자의 휴대 단말기로 센서노드가 설치되어 있는 실내 환경 정보를 사전 인지하고, 위험 요소가 인지될 경우 적절한 대비를 취할 수 있는 장점이 있다.

• 센서학회지
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• 제17권3호
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• pp.168-177
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• 2008

An indoor environmental monitoring system using IEEE 802.15.4 based wireless sensor network is proposed to monitor the amount of pollutant entering to the room from outside and also the amount of pollutant that is generated in indoor by the building materials itself or human activities. Small-size, low-power wireless sensor node and low power electrochemical sensor board is designed to measure the condition of indoor environment in buildings such as home, offices, commercial premises and schools. In this paper, two query models, the broadcasting query protocol and flooding query protocol, were designed and programmed as a query-based routing protocol in wireless sensor network for an environment monitoring system. The flooding query routing protocol in environment monitoring is very effective as a power saving routing protocol and reliable data transmission between sensor nodes.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2005년도 ICCAS
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• pp.449-452
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• 2005

For home networking system with a function of air quality monitoring, a wireless sensor module with several air quality monitoring sensors was developed for indoor environment monitoring system in home networking. The module has various enlargements for various kinds of sensors such as humidity sensor, temperature sensor, CO2 sensor, flying dust sensor, and etc. The developed wireless module is very convenient to be installed on the wall of a room or office, and the sensors in the module can be easily replaced due to well designed module structure and RF connection method. To reduce the system cost, only one RF transmission block was used for sensors' signal transmission to 8051 microcontroller board in time sharing method. In this home networking system, various indoor environmental parameters could be monitored in real time from RF wireless sensor module. Indoor vision was transferred to client PC or PDA from surveillance camera installed indoor or desired site. Web server using Oracle DB was used for saving the visions by web-camera and various data from wireless sensor module.

• 한국산업정보학회논문지
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• 제21권6호
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• pp.71-80
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• 2016

생활수준이 점차 높아짐에 따라 환경문제에 대한 국민들의 관심과 인식 수준도 증가하였다. 최근 들어 실내 활동시간이 증가함에 따라 환경에 대한 인식과 개선에 대한 방안이 요구되고 있다. 본 연구에서는 IoT 기반 기술을 이용하여 실시간으로 실내 환경에 대한 모니터링을 통해 환경정보를 수집하고 연동된 제어장치를 이용하여 실내 환경을 적정수준으로 유지하고 개선하는 시스템을 설계하고 개발하였다. 이는 기존의 수동적인 실내 환경개선 행위나 대규모 설비를 대신하여 가정이나 소규모 장소에서도 자동적인 실내 환경개선 시스템을 제공한다. 본 시스템은 공기 질과 CO2, 온도와 습도, 소음과 조도에 따른 상태분석과 함께 상대적 기준치를 적용하여 9가지의 상태에 따른 제어신호를 자동제어 모듈로 전송하여 실내 환경을 개선한다.

• 한국대기환경학회지
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• 제30권3호
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• pp.233-244
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• 2014

The objective of this study was to explore the characteristics of concentration of indoor air pollutants, such as $PM_{10}$, $CO_2$, and $NO_2$, measured by tele-monitoring system in a Seoul Metropolitan underground railway station from January 1, 2008 to December 31, 2012. The annual average concentration of indoor air pollutants actually varied over a wide range and was found to exhibit marked variation with time and measurement sites (tunnel inlet, platform, and concourse). After installing platform screen doors, the average $PM_{10}$ concentration on platform and concourse was decreased by 43.8% and 31.2%, respectively during the study periods. The relationship between the concentration of $PM_{10}$ and meteorological parameters (relative humidity and rainfall) or the Asian dust events was regarded as statistically significant. The correlations between the number of boarding/alighting passengers and $PM_{10}$, $CO_2$, and $NO_2$ were calculated. A p-value of less than 0.01 was regarded as significant except $NO_2$. The I/O ratio of $PM_{10}$ concentration was elevated after a congested time (about 08:00 am). The average I/O ratios of $NO_2$ were observed in concourse and platform on 03:00 am with $1.76{\pm}0.91$ and $1.50{\pm}0.51$, respectively. The average daily variation of standard excess rate of $PM_{10}$ and $NO_2$ concentration in concourse and platform was investigated. The highest standard excess rate was observed on 21:00 (09:00 pm).

• 한국정보통신학회논문지
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• 제20권2호
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• pp.367-374
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• 2016

오늘날 많은 사람들은 공동의 실내 공간에서 학업이나 업무 등의 다양한 일을 수행한다. 그러나 이렇게 함께 공동으로 사용하는 공간은 여러 가지 오염 요인에 의해 업무의 효율 뿐 만아니라 건강에도 좋지 않은 영향을 미치게 될 수 있다. 그래서 무엇보다도 공동으로 사용하는 공간에 대한 쾌적한 환경의 유지가 중요한 요소로 인식되고 있다. 본 논문에서는 이러한 공동으로 사용되는 사무실이나 도서관, 강의실 등의 공간을 보다 쾌적한 환경으로 만들기 위해서 환경적으로 유해한 요소들을 분석하고, 이러한 유해 요소들을 관리하여 보다 좋은 생활환경을 제공하기 위한 통합 실내 환경 관제시스템을 설계 구현한다. 제안된 실내 환경 관제시스템은 실내 환경의 상태를 실시간으로 모니터링 할 수 있고 액추에이터를 구동시킴으로써 쾌적한 환경을 제공할 것이다. 또한, 각종 실내 공간에 적용할 수 있을 뿐만아니라 사람들의 실내 환경오염 인지도 역시 높이는 방안이 될 것이다.

• 대한임베디드공학회논문지
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• 제13권2호
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• pp.101-107
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• 2018

As indoor pollutants such as carbon dioxide and dust mainly affect the respiratory and circulatory systems, there is an increasing need for real-time indoor / outdoor environmental monitoring. In this paper, we have developed a real - time environmental monitoring system using the cloud-based 3G integrated environmental sensor module for environmental monitoring. A highly reliable environmental information monitoring system requires various IT technologies such as infrastructure (server, commercial software, etc.), service application software, security, and authentication. A real-time environment monitoring system based on cloud service that can provide reliable service satisfying these configuration requirements is proposed and implemented. It is expected that this system can be applied to various technologies such as indoor automatic window opening/closing system based on the Internet.

• 센서학회지
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• 제12권1호
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• pp.24-33
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• 2003

This research is about a comfort sensing system for human environmental monitoring using a one-bodied humidity and temperature sensor and an air flow sensor. The thermal comfort that a human being feels in indoor environment has been known to be influenced mostly by six parameters, i.e. air temperature, radiation, air flow, humidity, activity level and clothing thermal resistance. Considering an environmental monitoring, we have designed and fabricated a one-bodied humidity and temperature sensor and an air flow sensor that detect air relative humidity, temperature and air flow in human environment using surface micromachining technologies. Micro-controller calculates a PMV (predicted mean vote) and CSV (comfort sensing vote) with sensing signals and display a PMV on LCD (liquid crystal display) for human comfort on indoor climate. Our work has demonstrated that a comfort sensing system can provide an effective means of measuring and monitoring the indoor comfort sensing index of a human being. Experimental results with simulated environment clearly suggest that our comfort sensing system can be used in many applications such as air conditioning system, feedback controlling in automobile, home and hospital etc..

• 산업공학
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• 제25권1호
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• pp.114-126
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• 2012

This study describes a real-time location monitoring system developed for efficient operation of workplace in plant equipment maker. This monitoring system can be applied for indoor and outdoor working environment respectively. By using the real-time tracking system based on RTLS, it is possible to track worker's movement and location of working object under indoor working environment. For outdoor working environment, the real-time monitoring system based on IDGPS is applied for work safety and balanced workload. A case study is provided to evaluate the performance of the real-time monitoring system.