DOI: 10.1016/j.atmosenv.2020.117264
论文题名: ‘Envilution™’ chamber for performance evaluation of low-cost sensors
作者: Omidvarborna H. ; Kumar P. ; Tiwari A.
刊名: Atmospheric Environment
ISSN: 1352-2310
出版年: 2020
卷: 223 语种: 英语
英文关键词: Air quality
; Costs
; Environmental testing
; Humidity control
; Pollution control
; Air quality measurements
; Environmental pollutions
; Gaseous/particle pollutants
; Low-cost sensors
; Performance evaluation
; Quality control
; air quality
; air sampling
; atmospheric pollution
; certification
; cost analysis
; flux chamber
; linearity
; operations technology
; particulate matter
; performance assessment
; relative humidity
; sensor
; air pollutant
; Article
; calibration
; concentration (parameter)
; controlled study
; environmental temperature
; measurement
; particulate matter
; priority journal
学科: Air quality measurement
; Environmental-pollution chamber
; Gaseous/particle pollutants
; Low-cost sensors
; Performance evaluation
中文摘要: The emergence of low-cost sensors (LCSs) has rapidly changed the landscape of air pollution monitoring. Unlike regulatory standards with comprehensive processes for performance evaluation and certification for reference equipment, no accreditations or regulatory standards exist for LCSs. Hence, calibration and performance assessment of the LCSs are carried out via co-location experiments with reference instruments under limited ranges of environmental conditions and pollutant concentrations. We designed and tested an environmental-pollution (referred to as ‘Envilution™’) chamber to generate controlled environment for temperature and relative humidity (RH) along with different concentrations of particles so that varied real-world environmental conditions and pollution concentrations can be generated for the performance evaluation of LCSs. The custom-made 125L Envilution™ chamber consists of a humidifier/dehumidifier system, heat pump, particulate matter (PM) generator, a connection for gaseous air pollutants and reference measuring instruments. In the experiments under controlled conditions, the chamber was able to maintain diverse ambient and indoor environmental conditions (temperature range from 5 to 40 °C and RH from 10 to 90%) and stable pollutant concentrations, thereby enabling the use of chamber as a reference environment for LCSs' testing. For demonstration, the assessment was conducted based on temperature/RH (HDC1000 digital) and PM2.5 (HPMA115S0 Honeywell) sensors. A Vaisala HMT120 temperature/RH sensor and optical particle counter (Grimm EDM 107) were employed as reference instruments. The evaluation of LCSs, which were placed inside small enclosure kits, showed excellent correlation for temperature (R2 > 0.96), RH (R2 = 0.99), and PM2.5 (R2 = 0.97) with the reference instruments. The LCSs also demonstrated high linearity agreement (R2 > 0.98) among themselves at temperature (5–35 °C), RH (20–80%), PM2.5 (65–200 μg/m3) measurement ranges. The unique features of the chamber, including affordable cost, small size and lightweight, low maintenance/operational costs and ease of operation, has the potential to make it an on-demand package for LCSs' testing. © 2020 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160512
Appears in Collections: 气候变化与战略
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作者单位: Global Centre for Clean Air Research (GCARE), Department of Civil and Environmental Engineering, Engineering and Physical Sciences, University of Surrey, Guildford, GU2 7XH, United Kingdom; Department of Civil, Structural & Environmental Engineering, School of Engineering, Trinity College Dublin, Dublin, Ireland
Recommended Citation:
Omidvarborna H.,Kumar P.,Tiwari A.. ‘Envilution™’ chamber for performance evaluation of low-cost sensors[J]. Atmospheric Environment,2020-01-01,223