A new particle sensor based on true RMS value measurement

Shao, Wenjia; Zhang, Hongjian; Zhou, Hongliang

doi:10.1109/i2mtc.2016.7520398

Cited by 4 publications

(3 citation statements)

References 9 publications

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“…In order to diminish the influence of meteorological parameters such as RH on the PM2.5 sensors based on light scattering, a new particle sensor based on multi-angle light scattering and data fusion is proposed in this paper. The sensor presented here is a new version of the prototype developed by our group and shows better accuracy and stability with respect to thedevice reported earlier in reference [ 18 ]. The rest of the paper is arranged as follows: the design of the sensor is described in Section 2 .…”

Section: Introductionmentioning

confidence: 88%

“…Similar to the RMS (Root Meam Square) moving average method in reference [ 18 ], a signal processing program was written using LabVIEW. As illustrated in Figure 4 , the scattered light signals of the three photodiodes are conditioned by Median Filter, Moving Average Filter and so on.…”

Section: Design Of the Sensor And Particle Measurement Systemmentioning

confidence: 99%

“…The sensor presented here is a new version of the prototype developed by our group and shows better accuracy and stability with respect to thedevice reported earlier in reference [18]. The rest of the paper is arranged as follows: the design of the sensor is described in Section 2.…”

Section: Introductionmentioning

confidence: 99%

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Fine Particle Sensor Based on Multi-Angle Light Scattering and Data Fusion

Shao

Zhang

Zhou

2017

Sensors

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Meteorological parameters such as relative humidity have a significant impact on the precision of PM2.5 measurement instruments based on light scattering. Instead of adding meteorological sensors or dehumidification devices used widely in commercial PM2.5 measurement instruments, a novel particle sensor based on multi-angle light scattering and data fusion is proposed to eliminate the effect of meteorological factors. Three photodiodes are employed to collect the scattered light flux at three distinct angles. Weather index is defined as the ratio of scattered light fluxes collected at the 40° and 55° angles, which can be used to distinguish the mass median diameter variation caused by different meteorological parameters. Simulations based on Lorenz-Mie theory and field experiments establish the feasibility of this scheme. Experimental results indicate that mass median diameter has less effect on the photodiode at the 55° angle in comparison with photodiodes at the 40° angle and 140° angle. After correction using the weather index, the photodiode at the 40° angle yielded the best results followed by photodiodes at the 55° angle and the 140° angle.

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Section: Introductionmentioning

confidence: 88%

Section: Design Of the Sensor And Particle Measurement Systemmentioning

confidence: 99%