Low-Cost Sensors Calibration for Monitoring Air Quality in the Federal District—Brazil

• 作者: Eduardo Neiva Caetano Botelho de Carvalho Erick Frederico Kill Aguiar Henrique Llacer Roig Luís Henrique Mancini
• 来源期刊: 环境保护(英文)
• 学科: 医学
• 关键词: LOW-COST SENSORS MONITORING Air Quality CALIBRATION of Micro-Sensors MiCS-5521 (CO/VOC) WebGIS
• 年，卷（期）: 2015,（2）
• 页码范围: 173-189
• 页数: 17页
• 分类号: R73

摘要

Critical situations that cannot be solved by conventional approaches (traditional air quality monitoring networks), have the possibility of being managed quickly by a wide network of portable systems with sensors. The purpose of this research was to calibrate and validate low-cost sensors. Pilot indoor and outdoor areas, in the central area of Brasilia (Brazil’s capital city) were chosen for corporative performance evaluation of the sensors. The CO at 99.999% volumetric injection method has been used in a gas test box, among two MiCS-5521 (CO/VOC) sensors, one being new and the other one with a short useful life. The number of injections adopted to each volume (from 1 ml to 6 ml) was 10, rising each sensor’s confidence interval mean. A increase of the injected volume (ml) of CO resulted in significant decrease in a resistance (Ohms), as shown by a good inverse relationship on the interaction of these two variables (r = 0.88), with good measurement accuracy, when compared to the manufacturer’s reference datasheet. Finally, a geospatial management system was built for the pollution data measured by the low-cost sensors.