IOT기술을 이용한 유무선 통합 가스검출 시스템 구현

방용기,강경식 대한안전경영과학회 2015 대한안전경영과학회지 Vol.17 No.4

This study concerns the integrated gas sensor system of wire and wireless communication by using IoT(Internet of Things) technology. First, communication part is that it delivers the detection information, which transferred by wire or wireless communication and required control procedure based on a wireless module that receives the gas leakage information from wired or wireless detector, to administrator or user’s terminal. Second, receiver part is that it shows the location and information, which received from the wired detector formed by a detecting sensor’s node as linking with the communication part, and transfers these to the communication part. Third, wireless detector formed as a communication module of a detecting sensor node is that it detects gas leakage and transfers the information through wireless as a packet.Fourth, wired detector communicated with the receiver part and formed as a communication module of a detecting sensor node is that it detects gas leakage, transfers and shows the information as a packet. Fifth, administrator’s terminal is that it receives gas leakage information by the communication part, transfers the signal by remote-control, and shut off a gas valve as responding the information. Sixth, database is that it is connected with the communication part; it sets and stores the default values for detecting smoke, CO., and temperature; it transfers this information to the communication part or sends a gas detecting signal to user’s terminal. Seventh, user’s terminal is that it receives each location’s default value which stored and set at the database; it manages emergency situation as shutting off a gas valve through remote control by corresponding each location’s gas leakage information, which transferred from the detector to the communication part by wireless.It is possible to process a high quality data regarding flammable or toxic gas by transferring the data, which measured by a sensor module of detector, to the communication part through wire and wireless. And, it allows a user to find the location by a smart phone where gas leaks. Eventually, it minimizes human life or property loss by having stability on gas leakage as well as corresponding each location’s information quickly.

냉동기 암모니아 누출양상 및 검지장치 위치선정을 위한 수치해석적 연구

이주용(Ju-Yong Lee),김병준(Byeongjun Kim),신원규(Weon Gyu Shin) 대한기계학회 2018 大韓機械學會論文集B Vol.42 No.8

암모니아는 가연성 및 독성가스로 분류되지만 누출을 알려주는 가스누출검지장치 설치에 대한 기준이 없다. 본 연구에서는 누출검지장치의 기준을 설정하기 위해 수치 해석적 연구를 수행하였다. 해석결과 누출부위가 25 mm 이상일 때 수평거리 9 m 이내의 실내 모든 구간에서 20 s 안에 검지농도를 초과하였다. 또한, 상부에 축적되어 폭발분위기를 형성하였다. 이러한 결과를 통해 가스누출검지장치는 압력에 상관없이 누출부위와 가까운 상부로부터 수직거리 30 cm 이내에 설치하는 것이 적절하다고 판단된다. Ammonia is classified as a flammable and poisonous gas; however, no criterion exists for the installation of a gas leak detector. In this study, we conducted numerical simulations to determine an appropriate criterion for the positioning of ammonia gas detectors. The simulation results show that ammonia exceeds the detectable concentration within 20 s in all sections of the room within a horizontal distance of 9 m when the diameter of the leaked section is greater than 25 mm. In addition, the gas is found to accumulate at the upper part. Based on our results, it is considered appropriate to install the gas leak detector within a vertical distance of 30 cm from the top, close to the leaking area, regardless of the leakage pressure.

IOT기술을 이용한 유무선 통합 가스검출 시스템 구현

방용기,강경식 대한안전경영과학회 2015 대한안전경영과학회지 Vol.17 No.4

This study concerns the integrated gas sensor system of wire and wireless communication by using IoT(Internet of Things) technology. First, communication part is that it delivers the detection information, which transferred by wire or wireless communication and required control procedure based on a wireless module that receives the gas leakage information from wired or wireless detector, to administrator or user’s terminal. Second, receiver part is that it shows the location and information, which received from the wired detector formed by a detecting sensor’s node as linking with the communication part, and transfers these to the communication part. Third, wireless detector formed as a communication module of a detecting sensor node is that it detects gas leakage and transfers the information through wireless as a packet.Fourth, wired detector communicated with the receiver part and formed as a communication module of a detecting sensor node is that it detects gas leakage, transfers and shows the information as a packet. Fifth, administrator’s terminal is that it receives gas leakage information by the communication part, transfers the signal by remote-control, and shut off a gas valve as responding the information. Sixth, database is that it is connected with the communication part; it sets and stores the default values for detecting smoke, CO., and temperature; it transfers this information to the communication part or sends a gas detecting signal to user’s terminal. Seventh, user’s terminal is that it receives each location’s default value which stored and set at the database; it manages emergency situation as shutting off a gas valve through remote control by corresponding each location’s gas leakage information, which transferred from the detector to the communication part by wireless.It is possible to process a high quality data regarding flammable or toxic gas by transferring the data, which measured by a sensor module of detector, to the communication part through wire and wireless. And, it allows a user to find the location by a smart phone where gas leaks. Eventually, it minimizes human life or property loss by having stability on gas leakage as well as corresponding each location’s information quickly.

양자기술기반 가스 누출 감지 시스템 개발

권오성(Oh Sung Kwon),박민영(Min Young Park),반창우(Changwoo Ban) 한국가스학회 2021 한국가스학회지 Vol.25 No.5

가스는 일반 가정 및 산업현장에서 폭 넓게 사용되는 에너지원이기도 하고, 석유화학 및 반도체 공정에서 넓게 사용되는 공정 물질이기도 하다. 그러나 사용이 쉬운 반면에 누출 시, 폭발 및 인체흡입 등으로 대규모 인명피해를 발생시키기도 한다. 따라서 가정 및 산업현장에서 안심하고 사용할 수 있는 가스 시설물 안전관리 솔루션은 필수적이다. 특히 가스시설의 노후화에 따라 고도화된 가스안전 솔루션의 개발 필요성이 대두되고 있는 실정이다. 본 논문은 가스 시설물에 더 이상 나눌 수 없는 최소 에너지 단위인 광자를 조사하고, 반사된 광자의 수를 분석해 원거리에서 가스 누출 여부 및 농도를 측정하는 기술을 개발하였다. 이는 기존의 전기/화학식 가스 센서나 적외선 기반의 가스 누출 감지기의 한계인 짧은 탐지 거리, 미세 누출 감지 불가 등의 기술적 한계를 극복하였다. Gas is an energy source widely used in general households and industrial sites, and is also a process material widely used in petrochemical and semiconductor processes. However, while it is easy to use, it can cause large-scale human damage due to leakage, explosion, and human inhalation. Therefore, a gas facility safety management solution that can be safely used at home and industrial sites is essential. In particular, the need to develop advanced gas safety solutions is emerging as gas facilities are aging. In this paper, a technology was developed to measure the presence and concentration of gas leaks from a distance by irradiating photons, the minimum energy unit that can no longer be divided into gas facilities, and analyzing the number of reflected photons. This overcomes technical limitations such as short detection distance and inability to detect fine leaks, which are the limitations of conventional electric/chemical gas sensors or infrared-based gas leak detectors.

가상 환경에서의 가스 누출 음향 데이터 수집

임수빈,박성욱 대한전자공학회 2023 전자공학회논문지 Vol.60 No.4

This paper investigated a method to produce sound data from virtual environment, which is essential for data-driven development of gas leak detectors. The produced data were compared with a previous research, where the envelope of sound pressure level along frequency were largely similar. The virtual environment utilized LES model for fluid dynamics and the Lighthill’s model for acoustics. The production was performed with various geometries, leaked gas speeds and orifice shapes. 음향 기반의 가스 누출 감지기 개발에 필요한 가스 누출 음향을, 가상환경에서 생산하는 방법에 대하여 고찰하였다. 그리고 이렇게 만들어진 가상환경이 기존의 연구와 비교하였을 때 유사한 경향을 보임을 확인할 수 있었다. 가상환경에서는 Navier-Stokes equation을 LES (Large Eddy Simulation) 난류 모형을 기반으로 풀이하고, 그 결과로 얻은 유체속도를 이용하여 Lighthill 의 aero-acoustic model 의 해를 구하는 방식을 사용하였다. 이러한 방식으로 특정 위치에서, 누출 환경(기하학적 구조), 누출되는 가스 속도, 그리고 누출구(orifice)의 모양 등을 바꾸어 가면서 음압 크기(sound pressure level)을 얻을 수 있었다.

초음파 음향누설탐지기의 야외성능시험

조재완,이재철,최유락 제어로봇시스템학회 2021 제어로봇시스템학회 국내학술대회 논문집 Vol.2021 No.6

In this paper, we describe the field test results of the ultrasonic acoustic leak detector. The field test was conducted for about 1 year and 2 months from late January 2020 to mid March 2021.

초음파 음향누설탐지기의 야외배경잡음 측정

조재완,이재철,최유락 제어로봇시스템학회 2021 제어로봇시스템학회 국내학술대회 논문집 Vol.2021 No.6

In this paper, we describe the outdoor background noise measurement results of the ultrasonic acoustic leak detector. The outdoor test was conducted for about 1 year and 2 months from late January 2020 to mid March 2021.

Effect of a Series Connection of a Bi-Electrolyte Hydrogen Sensor in a Leak Detector

( Hyeuk Jin Han ),( Chong Ook Park ),( Young Kyu Hong ),( Jong Suk Kim ),( Jeong Woo Yang ),( Yoon Seo Kim ) 한국센서학회 2015 센서학회지 Vol.24 No.1

Conventional leak detectors are widely based on helium gas sensors. However, the usage of hydrogen sensors in leak detectors has increased because of the high prices of helium leak detectors and the dearth in the supply of helium gas. In this study, a hydrogen leak detector was developed using solid-state hydrogen sensors. The hydrogen sensors are based on Park.Rapp probes with heterojunctions made by oxygen-ion conducting Yttria-stabilized zirconia and proton-conducting In-doped CaZrO3. The hydrogen sensors were used for determining the potential difference between air and air balanced 5 ppm of H2. Even though the Park.Rapp probe shows an excellent selectivity for hydrogen, the sensitivity of the sensor was low because of the low concentration of hydrogen, and the oxygen on the surface of the sensor. In order to increase the sensitivity of the sensor, the sensors were connected in series by Pt wires to increase the potential difference. The sensors were tested at temperatures ranging from 500.600oC.

Helium Leak Detector

홍승수 한국진공학회 2020 한국진공학회 학술발표회초록집 Vol.2020 No.8

초음파 음향누설탐지기의 Steam Leak 측정

조재완,이재철,최유락 제어로봇시스템학회 2021 제어로봇시스템학회 국내학술대회 논문집 Vol.2021 No.6

In this paper, the signal characteristics of an ultrasonic acoustic leak detector in a high-temperature steam leak environment were described. The outdoor steam leak tests were conducted 30 times for about 2 months.