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低成本的CO2传感器:现场性能评估和同位点校正程序,用于学校可靠的通风评估
David Honan1,2, John Garvey3, John Littlewood4
1Department of Civil, Structural & Environmental Engineering, Trinity College Dublin, The University of Dublin, D02 PN40 Dublin, Ireland.
Sensors (Basel, Switzerland)
|February 27, 2026
概括
这项研究开发了一种实用方法,用于校准低成本的二氧化碳 (CO2) 传感器,用于学校通风监测. 标准化技术显著提高了传感器的准确性和可比性,确保可靠的室内空气质量评估.
科学领域:
- 环境科学 环境科学
- 室内空气质量监测室内空气质量监测
- 传感器技术 传感器技术
背景情况:
- 通风对于学校室内环境质量至关重要,通常由室内二氧化碳 (CO2) 水平来调节.
- 低成本的非分散性红外 (NDIR) CO2传感器对于监测是实用的,但受到传感器变化的影响.
- 准确的二氧化碳测量对于教育环境中有效的通风策略至关重要.
研究的目的:
- 评估用于学校通风的低成本二氧化碳传感器的性能.
- 开发和验证规范化功能,以提高传感器可比性.
- 在没有实验室设备的情况下引入可访问的现场校准方法.
主要方法:
- 在三个测试期内,在典型的学校环境中同时安装23个低成本的二氧化碳传感器.
- 开发和验证标准化模型,使用一个休息一期的方法.
- 在传感器校准中应用基于回归的校正和网络衍生的全局参考.
主要成果:
- 在正常化前显示高线性 (R2=0.999) 但显著的变化 (RMSE=18.3 ppm).
- 正常化将RMSE降低了27%,范围之外的测量减少了43%.
- 经过校正的传感器显示出高的一致性,在环境水平下RMSE=7.4 ppm,在1500 ppm以下为11.9 ppm.
结论:
- 为评估和规范低成本二氧化碳传感器制定了一种实用且易于使用的方法.
- 开发的规范化功能显著提高了传感器的准确性和通风监控的可比性.
- 这种方法支持学校可靠且具有成本效益的室内空气质量评估.
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