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

低成本的气体取样对于一系列工业和环境应用来说是非常重要的。非色散红外（NDIR）光谱是一种经过验证且广泛使用的低成本气体检测方法，现在可用于各种超小型，低成本配置。然而，虽然对于某些物种（例如CO2）， NDIR仪器能够在一系列环境中进行高精度测量，但如果存在多种吸收物种，其光谱分辨率有限（通常为100厘米-1），则无法定量使用NDIR技术。我们建议通过使用~ 5 cm-1光谱分辨率的静态FTIR来克服这一限制，并将其与紧凑的微型白细胞集成在一起，以生产一个原型超紧凑FTIR光谱仪。该仪器将在红外光谱中工作，该光谱区域包含许多分子种类的强基本吸收。交付成果将包括：-功能原型气体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-完全集成的低成本FTIR仪器的概念设计主要交付成果是集成的小型化低成本FTIR光谱仪，将广泛适用于低成本气体检测，包括工业，环境监测和大气科学。其目的是寻求TSB和STFC创新以及NERC/EPSRC的后续资金，用于技术开发和科学应用。项目本身预计将持续6个月，从2012年10月1日开始。

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.