Portable, low-cost, Raspberry Pi-based optical sensor (PiSENS): continuous monitoring of atmospheric nitrogen dioxide
Portable, low-cost, Raspberry Pi-based optical sensor (PiSENS): continuous monitoring of atmospheric nitrogen dioxide
复制标题
基于 Raspberry Pi 的便携式低成本光学传感器 (PiSENS)：连续监测大气二氧化氮
DOI：
10.1039/d2ay01433e
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发表时间：
2023
影响因子：
3.1
通讯作者：
Radu, Aleksandar
中科院分区：
文献类型：
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作者：
Saiz, Ernesto;Banicevic, Ivana;Espinoza Torres, Sergio;Bertata, Salma;Picasso, Gino;O'Brien, Matthew;Radu, Aleksandar
我们开发了一种传感系统，该系统利用低成本计算机（Raspberry Pi）及其成像相机作为光学传感核心，用于连续检测空气中的NO2（PiSENS-A）。该传感器基于气体与吸收溶液相互作用产生的显色。PiSENS-A在每小时平均值上进行了彻底校准，这是评估空气质量的关键指标之一。校准在0 < [NO2] < 476 μg m−3的范围内进行，选择包含用于确定符合英国空气质量标准法规（2010年）的阈值，表示为最多18个[NO2]小时平均值的允许浓度= 200 μg/m3/年。针对UV-vis评价基于实验室的测量。以相对标准偏差表示的平均精密度为：RSD% = 2.8%，而模拟样品的相关性极佳（Pearson's r = 1.000）。基于场的测量相对于显示相关系数R2 = 0.993的基于荧光的仪器进行评价。PiSENS-A还被部署为基尔大学校园的独立空气质量分析仪。
We have developed a sensing system that utilizes a low-cost computer (Raspberry Pi) and its imaging camera as an optical sensing core for the continuous detection of NO2 in the air (PiSENS-A). The sensor is based on colour development as a consequence of the interaction of the gas with an absorbing solution. The PiSENS-A is thoroughly calibrated over the hourly mean which is used as one of the key metrics in evaluating air quality. The calibration was performed in the range of 0 < [NO2] < 476 μg m−3 chosen to contain the threshold used to determine compliance to the UK's Air Quality Standard Regulations (2010) expressed as a maximum of 18 permitted exceedances of [NO2]hourly mean = 200 μg per m3 per year. Lab-based measurements were evaluated against UV-vis. The average precision expressed as a relative standard deviation was: RSD% = 2.8%, while the correlation of mock samples was excellent (Pearson's r = 1.000). Field-based measurements were evaluated against chemiluminescence-based instrument exhibiting a correlation coefficient of R2 = 0.993. The PiSENS-A was also deployed as an independent air quality analyser at the Keele University campus.