An integrated low cost miniaturised Fourier transform spectrometer for the simultaneous measurement of multiple atmospheric species.

低成本的气体采样在一系列工业和环境应用中是非常重要的。非色散红外(NDIR)光谱是一种经过充分验证和广泛使用的低成本气体检测方法，目前可用于各种超小型、低成本配置。然而，虽然对于某些物种(如二氧化碳)，NDIR仪器能够在一系列环境中进行高精度测量，但如果存在多个吸收物种，由于其有限的光谱分辨率(通常为100s cm-1)，NDIR技术不能定量使用。为了克服这一限制，我们建议使用一台具有~5 cm-1光谱分辨率的静态FTIR，并将其与一个紧凑的微型白室集成在一起，以产生一个原型的超紧凑FTIR光谱仪。该仪器将在中红外波段工作，这是一个包含许多分子物种的强基波吸收的光谱区域。可交付的产品包括：-可正常工作的原型气体FTS光谱仪和吸收池-实验室验证和灵敏度测试(CO2、H2O、CH4和N2O)--有限现场试验的结果基于完全集成的低成本FTIR仪器的概念设计主要交付产品是一种集成的小型化低成本FTIR光谱仪，将在包括工业、环境监测和大气科学在内的低成本气体检测中具有广泛的适用性。其目的是为技术开发和科学应用寻求TSB和STFC Innovation以及NERC/EPSRC的后续资金。该项目本身预计将从2012年10月1日起持续6个月。

Low cost gas sampling is at a premium for a range of industrial and environmental applications. Non-dispersive infra-red (NDIR) spectroscopy is a well-proven and widely used method for low cost gas detection and is now available in a variety of ultra small, low cost configurations. However, while for some species (e.g. CO2) NDIR instruments are capable of high precision measurements in a range of environments, if multiple absorbing species are present, with its restricted spectral resolution (typically 100s of cm-1), NDIR techniques cannot be used quantitatively. We propose to overcome this limitation through the use of a static FTIR with ~ 5 cm-1 spectral resolution, integrated with a compact miniature White cell to produce a prototype ultra compact FTIR spectrometer. The instrument will operate in the mid IR, a spectral region which contains the strong fundamental absorptions of many molecular species. The deliverables will be:- A functioning prototype gas FTS spectrometer and absorption cell- Laboratory validation and sensitivity tests (CO2, H2O, CH4 and N2O)- Results from limited field trialsConceptual design for a fully integrated low cost FTIR based instrumentThe principal deliverable, an integrated miniaturised low cost FTIR spectrometer, will have wide ranging applicability in low cost gas detection, including industry, environmental monitoring and atmospheric science. The intention would be to seek follow-on funding from TSB and STFC Innovations, and NERC/EPSRC for technical developments and scientific applications. The Project itself is expected to last for 6 months from 1-Oct 2012.