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| 基于主成分分析的β射线法PM2.5测量准确性影响因素分析 |
| Influence Factor on PM2.5 Measurement Accuracy by β ray Method Based on Principal Component Analysis |
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| DOI： |
| 中文关键词: PM2.5 β射线法 主成分分析法 影响因素 |
| 英文关键词: PM2.5 β ray method Principle component analysis Influence factor |
| 基金项目:国家重点研发计划基金资助项目（2017YFC0805200）；〖JP〗天地科技股份有限公司科技创新创业基金资助项目（2018-TD-QN058） |
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| 摘要点击次数: 695 |
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| 中文摘要: |
| 采用主成分分析法探究环境温度、湿度、动态加热温度、采样流量、分离器切割性能、走纸精度、本底值分析时间、采样时间等8项因素对β射线法PM2.5测量准确度的影响，定量分析各影响因素的贡献率并提出主要影响因素的影响程度、控制范围及方法。结果表明：走纸精度、动态加热温度及采样流量的贡献率之和为54.2%，对β射线法PM2.5测量结果影响较为明显。为使测量结果误差＜5%，滤带定位误差应不超过1.3 mm，动态加热温度控制在45 ℃～50 ℃范围内，采样流量偏离在±0.8 L/min以内。 |
| 英文摘要: |
| The influences of eight factors：ambient temperature，humidity，dynamic heating temperature，sampling flow，separator cutting performance，paper feeding accuracy，analysis time of background value and sampling time on the accuracy of PM2.5 measurement by β ray method were studied based on principal component analysis. The contribution rate of each factor was quantitatively analyzed and the influences of the main factors，control of scope and method were put forward. The results showed that the sum of the contribution rate of paper feeding accuracy， dynamic heating temperature and sampling flow rate was 54.2%，which had an obvious influence on PM2.5 measurement by β ray method. In order to make the measurement error less than 5%， the positioning error of filter strip should not exceed 1.3 mm，the dynamic heating temperature should be in the range of 45 ℃~50 ℃，and the deviation of sampling flow should be within ±0.8 L/min. |
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