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低成本颗粒物传感器的基于可见度的校准:实验室评估和理论分析
Ayala Ronen1,2
1Environmental Physics Department, Israel Institute for Biological Research (IIBR), Ness Ziona 7410001, Israel.
Sensors (Basel, Switzerland)
|November 27, 2025
概括
使用可见度数据对低成本颗粒物 (PM) 传感器进行校准提供了一个实际的解决方案. 这种方法提高了PM传感器的精度,使其可靠用于广泛的环境监测.
科学领域:
- 环境科学 环境科学
- 传感器技术 传感器技术
- 大气科学 大气科学
背景情况:
- 像SDS011这样的低成本光学颗粒物 (PM) 传感器很受欢迎,但需要精确的校准.
- 传感器的精度受到气溶特性和环境因素的影响.
研究的目的:
- 评估使用可见度传感器的低成本PM传感器的实用校准方法.
- 为了实现准确的,实时的PM监控,特别是在资源有限的环境中.
主要方法:
- 实验是在一个受控的气溶室中进行的,使用SDS011传感器,可见度传感器 (FD70,SWS250) 和重力测量样本.
- 通过将可见度测量与质量度的相关性来确定大规模灭绝系数.
- 来自SDS011传感器的光学信号使用大规模灭绝系数将其转换为准确的PM值.
主要成果:
- 对校准的SDS011传感器确定了一个稳定的正常化因子,这取决于气溶类型,波长和颗粒大小.
- 与基于可见度的方法相比,制造商的校准显示出明显的偏差,原因是气溶的光学特性不同.
- 基于可见度的方法允许实时连续校准,使用最小的设备.
结论:
- 基于可见度的校准提供了一个可靠和可访问的框架,用于提高低成本的PM传感器精度.
- 这种方法可以通过单一的重力度参考进行可扩展的校准,适用于资源有限的环境.
- 在真实大气条件下需要进一步验证,以探索方法的稳定性.
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