基于传感器的CO<sub>2</sub>检测仪在水库CO<sub>2</sub>通量检测中的应用

逯又豪; 杨帆; 张溪; 孙松华; 庞小兵

doi:10.13205/j.hjgc.202310007

基于传感器的CO₂检测仪在水库CO₂通量检测中的应用

doi: 10.13205/j.hjgc.202310007

逯又豪¹,
杨帆²,
张溪³,
孙松华⁴,
庞小兵^1, ,

1. 浙江工业大学环境学院, 杭州 310000;
2. 水利部农村电气化研究所, 杭州 310000;
3. 长江师范学院绿色智慧环境学院, 重庆 408100;
4. 绍兴生态环境监测中心, 浙江绍兴 312000

基金项目:

浙江省"领雁"研发攻关计划（2022C03073）；浙江省自然科学基金（LZ20D050002）；绍兴市科技计划项目（2022B41006）；重庆市自然科学基金面上项目（cstc2019jcyj-msxmX0820）；南京水利科学研究院中央级公益性科研院所基本科研业务费专项资金（重点）项目（Y921015）

详细信息

作者简介:
逯又豪(1998-),男,硕士研究生,主要研究方向为大气检测装备开发。LuYH98DD@163.com

通讯作者:
庞小兵(1978-),男,教授,主要研究方向为大气检测装备开发。pangxb@zjut.edu.cn

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出版历程
- 收稿日期: 2023-07-25
- 网络出版日期: 2023-12-26

APPLICATION OF CO₂ DETECTOR BASED ON SENSORS IN CO₂ FLUX DETECTION OF RESERVOIRS

1. College of Environment, Zhejiang University of Technology, Hangzhou 310000, China;
2. Rural Electrification Research Institute of the Ministry of Water Resources, Hangzhou 310000, China;
3. Green Intelligence Environmental School, Yangtze Normal University, Chongqing 408100, China;
4. Shaoxing Ecological Environment Monitoring Center, Shaoxing 312000, China

摘要

摘要: 在自然水体水-气界面二氧化碳（CO₂）通量的测定中常用的CO₂检测仪器是基于长光路红外吸收法，仪器质量和体积偏大且价格高昂。为了降低研究成本，减小检测设备的质量和体积，将1种基于非分散红外（non-dispersive infrared，NDIR）原理的CO₂传感器部署在通量箱中，搭建了1套低成本CO₂检测仪器，并与原位检测对比实验。结果表明：低成本CO₂检测仪的CO₂体积分数检测结果相比参比仪器展现出良好的相关性（R²=0.86），低成本检测仪的相对偏差范围在-1.45%~0.92%。根据低成本检测仪检测结果计算出各检测点位的CO₂通量在7.76~15.93 mmol/（m²·d），其变化规律与参比仪器的结果一致。环境相对湿度和传感器自身的电压漂移是CO₂通量检测偏差的主要来源，可通过湿度修正和增加通量箱内CO₂传感器数量的方法来降低这两者的干扰。低成本检测仪在测定水库CO₂通量方面有良好的应用前景。
- 传感器 /
- 通量箱 /
- 二氧化碳(CO₂)通量 /
- 水库 /
- 检测偏差
Abstract: The commonly used CO₂ detection instrument for the measurement of CO₂ flux at the water-air interface of natural water is based on the long light path infrared absorption method, which is bulky and expensive. To reduce the research cost and the mass and volume of the detection equipment, a low-cost CO₂ sensor based on the principle of non-dispersive infrared (NDIR) was deployed in the flux box to build a low-cost CO₂ detection instrument, and the in-situ detection contrast experiment with the referred instrument was carried out. The results showed that, CO₂ volume fraction detection results of the low-cost CO₂ detector showed a good correlation (R²=0.86) with the referred instrument, and the relative deviation range of the low-cost detector was -1.45% to 0.92%. According to the low-cost detector results, the CO₂ flux at each detection point was estimated in the range of 7.76 to 15.93 mmol/(m²/d), and its change rule was the same as that of the referred instrument. Environmental relative humidity and voltage drift of the sensor itself were the main sources of CO₂ flux detection deviation. The interference of these two factors could be reduced by humidity correction and increasing the number of CO₂ sensors in the flux box. This low-cost detector has a good application prospect in measuring the CO₂ flux of reservoirs.
- sensor /
- flux box /
- carbon dioxide flux /
- reservoir /
- detection deviation

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