文章目录

Introduction

1 Measurement principle

2 Detection system for composite non-point sources emissions

3 Detection method and verification of eliminating gas fluctuation

4 Experimental verification

4.1 Verification experiment of the measurement method

4.2 Comparative experiment

4.3 Methane monitoring experiment in Fengqiu Ecological Station

5 Conclusions

文章摘要:在面源气体排放的测量过程中,不可避免地受到相邻田地气体排放干扰,又受到环境扰动的影响,影响气体检测的准确性。为了提高测量精度,研究了基于激光光谱检测的复合面源甲烷非均匀排放测量方法。通过多次自标定测量,减少了外部环境的干扰。设计了非均匀面源排放物检测系统,并提出了消除气体波动检测方法。首先进行了准确性验证试验,待测源a的标准差为0.17,待测源b的标准差为0.18;随后与光声光谱抽取式进行了对比试验,相关系数达到0.91;最后开展了外场实际的测量应用,对不同施肥方式造成的两个不均匀排放待测源进行监测,实现对多源不均匀排放的准确测量。它具有农业气体排放,环境气体检测等实用工程价值。

文章关键词:激光吸收光谱,准确测量,非均匀,复合面源,

项目基金:Supported by the National Natural Science Foundation of China(41805124),Anhui Natural Science (1808085MD107),Chinese Academy of Sciences Scientific Research Instrument and Equipment Development Project(YJKYYQ20190051)； Key Research and Development Plan of Anhui Province(201904a07020093)；