极端颗粒物浓度环境对低成本光散射颗粒物传感器性能影响

选取了市场上占有率比较大的几款低成本颗粒物传感器,与中高端光散射颗粒物监测仪做对比,以高浓度淹没实验模拟极端颗粒物浓度环境,检测传感器线性响应和平行性。结果发现,高浓度淹没实验后,PT、SF传感器线性较好,且仪器间平行性也较好;YT和NF传感器线性出现了较大偏差。结论表明,有必要将极端环境条件下传感器性能检测纳入考察范畴,尤其是对使用低成本传感器作为核心检测部件的扬尘监测系统和微型空气监测站,从而在最大程度上避免极端环境或突发环境变化时监测仪器性能受到影响,进一步保障颗粒物监测数据质量。

Influence of Extreme Particulate Matter Concentration Environment on Performance of Low-cost Light Scattering Particle Sensor

Four low-cost particulate sensors (PT, NF, SF, YT) were utilized as the representatives, comparing with medium-level light-scattering particulate matter monitor (LL).The linear response and parallelism were tested through the high concentration submergence experiment.The results showed that both the linearity of PT and SF sensor were much better than that of YT and NF sensors after the high-concentration submergence experiment.Moreover, the high concentration of dust barely influenced the parallelism of PT and SF.According to the consequences, the high concentration submergence experiment can indeed pick out the defectives to some extent, which indicated that high concentration submergence experiment could serve as a laboratory experiment to simulate extreme environmental conditions experiment for the purpose of pre-market testing.