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논문 기본 정보

자료유형
학술저널
저자정보
김형래 (한국표준과학연구원) 강훈 (한국표준과학연구원) 박인용 (한국표준과학연구원) 정진상 (한국표준과학연구원)
저널정보
한국대기환경학회 한국대기환경학회지(국문) 한국대기환경학회지 제38권 제1호
발행연도
2022.2
수록면
159 - 168 (10page)
DOI
10.5572/KOSAE.2022.38.1.159

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초록· 키워드

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Low-cost dust sensors are widely used because of their advantages in real-time measurement, portability, and low price. Low-cost dust sensor which adopts the OPC (optical particle counting) method converts the intensity of light scattering into an electrical signal to measure the particle size. It provides mass concentration information of dust to consumers through its own algorithm using the measured particle size information. However, most manufacturers do not provide information on the sensor’s size segregated mass concentration calculation algorithm, therefore users cannot know whether the sensor accurately measures the particle size or not. In this study, the particle size resolution performance evaluation of four types of low-cost dust sensors and one type of mid-to-low-cost type dust sensor, most commonly used in the market, was performed. Test particles were aerosolized and injected into a chamber and simultaneously measured with low-cost dust sensors and a reference measuring device (aerodynamic particle sizer; APS). The sensor’s electrical signals obtained through communication were correlated with the particle sizes measured by APS. As a result, it was confirmed that the four types of the low-cost dust sensors could not segregate the size of particles. Thus, the mass concentrations provided by the four types of the low-cost dust sensors and APS did not match each other. On the other hand, the mid-to-low-cost dust sensor could segregate the size of particles. Therefore, the mass concentrations measured by the mid-to-low-cost dust sensor and the mass concentrations measured by APS were similar to each other. The performance evaluation method that simply compares the mass concentration provided by a standard measuring instrument (beta ray measurement method, gravimetric method) and the mass concentration provided by low-cost dust sensor is not traceable. Therefore, it is important in terms of traceability to evaluate whether the low-cost dust sensors segregate the size of particles by light scattering method.

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Abstract
1. 서론
2. 연구 방법
3. 결과 및 고찰
4. 결론
References

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