Characterisation and calibration of low-cost PM sensors at high temporal resolution to reference-grade performance.
Characterisation and calibration of low-cost PM sensors at high temporal resolution to reference-grade performance.
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DOI：
10.1016/j.heliyon.2023.e15943
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发表时间：
2023-05
期刊：
影响因子：
4
通讯作者：
Loxham, Matthew
中科院分区：
文献类型：
--
作者：
Bulot, Florentin M. J.;Ossont, Steven J.;Morris, Andrew K. R.;Basford, Philip J.;Easton, Natasha H. C.;Mitchell, Hazel L.;Foster, Gavin L.;Cox, Simon J.;Loxham, Matthew
颗粒物（PM）的低成本传感器（LCS）提出了一个具有成本效益的机会，以提高空气中PM数据的时空分辨率。以前的研究集中在PM-LCS报告的每小时数据，并确定，没有完全解决，他们的局限性。然而，PM-LCS提供更精细的时间分辨率的测量。此外，政府机构已经开发了伴随这些传感器的新用途的认证，但是这些认证具有缺点。为了解决这些知识差距，两种型号的PM-LCS，8 Sensirion SPS 30和8 Plantower PMS 5003，与Fidas 200 S，MCERTS认证的PM监测仪搭配使用一年，并以2分钟的分辨率进行表征，从而能够复制认证过程，并突出其局限性和改进。使用传感器报告的颗粒数浓度和相对湿度的稳健线性模型，加上为期2周的两年一次的校准活动，在PM2.5背景浓度中位数为5.5 μg/m3的情况下，实现了参考级性能，表明通过仔细校准，PM-LCS可以在具有良好时空性的多节点网络中经济有效地补充参考设备。低成本PM传感器很少在其时间分辨率的全部范围内进行研究，并且需要有效的数据质量处理以达到低运营成本。这项研究搭配了16个低成本的PM传感器与参考仪器，在一个很好的时间分辨率为期一年的研究。在2 min分辨率下测试了不同的校准方法、频率和持续时间。该设置使传感器性能认证流程得以复制，并突出了改进。基于传感器报告的颗粒数浓度，精心选择的校准策略使低成本PM传感器能够在2分钟分辨率下达到参考级性能。
Particulate Matter (PM) low-cost sensors (LCS) present a cost-effective opportunity to improve the spatiotemporal resolution of airborne PM data. Previous studies focused on PM-LCS-reported hourly data and identified, without fully addressing, their limitations. However, PM-LCS provide measurements at finer temporal resolutions. Furthermore, government bodies have developed certifications to accompany new uses of these sensors, but these certifications have shortcomings. To address these knowledge gaps, PM-LCS of two models, 8 Sensirion SPS30 and 8 Plantower PMS5003, were collocated for one year with a Fidas 200S, MCERTS-certified PM monitor and were characterised at 2 min resolution, enabling replication of certification processes, and highlighting their limitations and improvements. Robust linear models using sensor-reported particle number concentrations and relative humidity, coupled with 2-week biannual calibration campaigns, achieved reference-grade performance, at median PM2.5 background concentration of 5.5 μg/m3, demonstrating that, with careful calibration, PM-LCS may cost-effectively supplement reference equipment in multi-nodes networks with fine spatiotemporality. Low-cost PM sensors are seldom studied at the full extent of their temporal resolution and require efficient data quality processes to reach a low operational cost. This study collocated 16 low-cost PM sensors with a reference instrument for a yearlong study at a fine temporal resolution. Different calibration methods, frequencies and duration were tested at 2 min resolution. The setup enabled the replication of sensor performance certification processes and highlighted improvements. Carefully selected calibration strategies, based on sensor-reported particle number concentration, enabled low-cost PM sensors to reach reference-grade performances at 2 min resolution.
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影响因子：
3.8
作者：
Hagan DH;Kroll JH
通讯作者：
Kroll JH
影响因子：
3.9
作者：
Lee, Hoochang;Kang, Jiseock;Lee, Dongjun
通讯作者：
Lee, Dongjun
影响因子：
11.4
作者：
Kim, E;Hopke, PK;Wilson, WE
通讯作者：
Wilson, WE
影响因子：
5
作者：
Ayers, GP
通讯作者：
Ayers, GP
DOI：
10.3390/s18092790
发表时间：
2018-08-24
期刊：
Sensors (Basel, Switzerland)
影响因子：
--
作者：
Di Antonio A;Popoola OAM;Ouyang B;Saffell J;Jones RL
通讯作者：
Jones RL