A low cost disposable instrument for vertical profile measurements of atmospheric CO2

用于大气二氧化碳垂直剖面测量的低成本一次性仪器

基本信息

批准号：
NE/H002650/1
负责人：
Roderic Jones
金额：
$ 11.5万
依托单位：
University of Cambridge
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2010
资助国家：
英国
起止时间：
2010 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=NE%2FH002650%2F1
关键词：
low cost disposable instrument vertical

项目摘要

This proposal is to assess the feasibility of adapting technology currently used for leak detection in commercial and domestic boiler systems to provide a low cost (50-100 euro) disposable sonde based instrument for measuring vertical profiles of CO2. With suitable measurement characteristics, a small network of such instruments could contribute significantly to global atmospheric CO2 flux monitoring, adding to the information obtainable from the current ground-based and satellite based approaches, with potentially significant implications for understanding and predicting future climate,. The principal deliverable of the project will be a prototype instrument optimised for CO2 profile measurements, and the design and performance specification for a production CO2 sonde instrument. The novelty of this approach is the adaptation of technology proven at concentrations well above background ambient conditions to the untried environment of the upper atmosphere where far higher precision is required. Technological approach: non dispersive infra-red (NDIR) absorption spectroscopy The basis of the technology is absorption spectroscopy, as expressed by the Beer-Lambert law. The advantage of this technique is that it has a fundamental calibration, based on known or calculable absorption-cross-sections. In this case a spectral filter rather than a dispersing element is used to define the spectral passband, hence the term 'non-dispersive'. CO2 is measured using its fundamental vibration-rotation absorption band centred at 2349 cm-1. The research program will take place in four phases: 1) Optimisation of sensor design 2) Construction of optimised prototype instrument 3) Laboratory and profile simulation instrument characterisation 4) Design and performance specification for a production CO2 sonde instrument.

该建议是评估当前用于在商业和家用锅炉系统中用于泄漏检测技术的适应技术的可行性，以提供低成本（50-100欧元）可支配SONDE的工具，用于测量CO2的垂直配置文件。有了合适的测量特性，此类工具的小网络可能会对全球大气CO2通量监测产生重大贡献，从而增加了可从当前基于地面和卫星的方法获得的信息，这对理解和预测未来气候具有潜在的重要意义。该项目的主要交付方式将是针对CO2概况测量的原型仪器，以及生产CO2 SONDE仪器的设计和性能规范。这种方法的新颖性是在浓度远高于背景环境条件下对技术进行了证明的适应，需要更高的精度。技术方法：非色散基础红外（NDIR）吸收光谱法所述的基础是吸收光谱，如Beer-Lambert Law所示。该技术的优点是它具有基于已知或可计算的吸收杂交段的基本校准。在这种情况下，光谱滤波器而不是分散元件用于定义光谱通带，因此术语为“非分散性”。 CO2使用其基本振动反转吸收带中以2349 cm-1的速度进行测量。研究计划将分为四个阶段：1）传感器设计的优化2）构建优化的原型仪器3）实验室和配置模拟仪器表征4）生产CO2 SONDE仪器的设计和性能规范。