Measuring Chemical Air Emissions Using Environmental CAT Scanning

0001385托德这项研究的目标是开发和实地测试一种创新的实时方法，用于测量、可视化和量化化学空气排放和排放率。该方法结合了开路傅里叶变换红外光谱(OP-FTIR)的化学探测技术和计算机辅助层析成像的测绘能力，利用环境CAT(计算机辅助层析成像)扫描系统生成了大面积的二维污染物浓度图。在拟议的系统中，几个OP-FTIR光谱仪沿着开放光束路径(大约长达一公里)发射红外线光束，以同时测量和识别大气中直接存在的各种多种污染物，通常是百万分之几或百万分之几的检测水平。层析成像系统使用数学图像重建算法将多个数据处理成二维化学地图。如果成功，这种方法将允许在大范围内实时地在空间上解析浓度，而不需要使用传统的点采样器来获得相同级别的细节。***

0001385 Todd The goals of this research are the development and field-testing of an innovative real-time method for measuring, visualizing and quantifying chemical air emissions and emission rates. With the proposed method, two-dimensional pollutant concentration maps of large areas are generated using an environmental CAT (computer assisted tomography) scanning system that couples the chemical detection technology of open-path Fourier transform infrared (OP-FTIR) spectroscopy with the mapping capabilities of computer assisted tomography. In the proposed system, several OP-FTIR spectrometers transmit beams of infrared light along open beam paths (up to one kilometer, approximately) to simultaneously measure and identify a wide range of multiple contaminants directly in the atmosphere, typically at part per billion or part per million detection levels. The tomographic system uses a mathematical image reconstruction algorithm to process the multiple data into two-dimensional chemical maps. If successful, this method will allow concentrations to be spatially resolved in real-time over large areas with fewer measurements than would be required with conventional point samplers to obtain the same level of detail. ***