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:
- 金额:$ 11.5万
- 依托单位:
- 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:
- 关键词:
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.
本提案旨在评估调整目前用于商业和家用锅炉系统泄漏检测的技术的可行性,以提供一种低成本(50-100欧元)的一次性探头式仪器,用于测量CO2的垂直分布。如果具备适当的测量特性,这种仪器的小型网络可大大有助于全球大气CO2通量监测,增加从目前地面和卫星方法获得的信息,对了解和预测未来气候具有潜在的重大影响。该项目的主要交付成果将是一个为CO2剖面测量优化的原型仪器,以及生产CO2探测仪的设计和性能规格。这一方法的新奇在于,将在远高于背景环境条件的浓度下证明有效的技术适用于需要高得多的精确度的未经试验的高层大气环境。技术方法:非色散红外(NH 4S)吸收光谱技术的基础是吸收光谱,如比尔-朗伯定律所表示的。这种技术的优点是它具有基于已知或可计算的吸收截面的基本校准。在这种情况下,使用光谱滤波器而不是色散元件来定义光谱通带,因此术语“非色散”。CO2的测量使用其中心在2349 cm-1的基本振动-旋转吸收带。研究计划将分四个阶段进行:1)传感器设计的优化2)优化原型仪器的构建3)实验室和剖面模拟仪器表征4)生产CO2探测仪的设计和性能规范。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Roderic Jones其他文献
Roderic Jones的其他文献
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