Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Development and Evaluation of Portable Multiple Gas Meter

휴대용 다중 가스측정 장비 개발 및 평가

  • 장희중 (LG전자 L&A연구센터) ;
  • 김응식 (호서대학교 안전소방학부) ;
  • 박종열 (호서대학교 안전환경기술융합대학원)
  • Received : 2018.11.09
  • Accepted : 2019.03.08
  • Published : 2019.03.31
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Abstract

Assessing the effect of forest fires and measuring the gas concentration around a fire has received little attention. Therefore, the concentrations of various gases in areas surrounding a fire need to be measured by the development of a suitable device. Unlike conventional portable devices, the AQS (Air Quality System) proposed in this paper is a portable instrument that measures five types of gases simultaneously, including CO, CO2, NOx, VOCs, and NH3, and has high durability through sensor protection algorithms. A PC-based program with an AQS connection was developed to monitor the real-time changes in the gas concentration. The reliability of the developed device was proven through a comparison of the results with other commercial gas analyzers. Measurements of the concentration due to indoor and outdoor fires were performed around a fire area to review the applicability and the predicted results were obtained.

화재 발생으로 인한 피해 및 영향에 관해 국내에서의 연구는 미비한 상태이다. 따라서 화재 발생에 따른 연기 농도를 측정하기 위한 기기를 개발함으로 연기가 주변 지역으로 확산될 경우의 농도를 측정하고자 한다. 본 논문에서 제안한 공기질 측정 시스템은 기존의 측정기와는 달리 CO, CO2, NOx VOCs, NH3 등 총 5가지의 가스를 동시에 측정할 수 있고, 센서보호 알고리즘을 통해 높은 내구 수명을 갖는다. 또한, 모니터링 프로그램을 통해 실시간 가스 변화량을 측정하는 시스템을 구성하였다. 상용 가스 분석기와의 비교를 통해 가스농도 측정의 신뢰성을 확보하였으며, 실내 및 실외 화재실험을 통해 발화점 주변에 존재하는 가스농도 평가를 실시하여 신뢰성이 높은 데이터를 얻을 수 있음을 확인하였다.

Keywords

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Fig. 1. Air quality system schematic

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Fig. 2. Air quality system artwork (Up-Front, Down-Back)

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Fig. 3. Air quaility system schematic(Power part)

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Fig. 4. Sensor schematic(CO&NOx, NH3 Part)

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Fig. 5. Sensor schematic(CO2 Part)

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Fig. 6. Sensor schematic(VOCs Part)

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Fig. 7. Air quality system proto sample ass’y

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Fig. 8. AQS in gas measurement chamber

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Fig. 9. Environment of gas measurement system

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Fig. 10. Dry and wet fuel(leaves, etc.)

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Fig. 11. Indoor gas measurement

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Fig. 12. Indoor gas measurement data

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Fig. 13. Installation of AQS on the vehicle

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Fig. 14. Smoke difference before and after a fire

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Fig. 15. Outdoor gas measurement data

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Fig. 16. Spiral driving for gas assessment

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Fig. 17. Results of spiral driving test

Table 1. Various gas sensor for measurement.

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