New Scanning Infrared Gas Imaging System (SIGIS 2) for Emergency Response Forces

摘要

The German ministry of the interior, represented by the civil defense agency BBK, is currently establishing analytical task forces for the analysis of released chemicals in the case of fires or chemical accidents. One part of the equipment of these emergency response forces will be a remote sensing system that allows the identification of hazardous clouds from long distances. Therefore, a new scanning infrared gas imaging system, SIGIS 2, is currently being developed at TUHH. The system is based on an interferometer with a single detector element (Bruker OPAG 33) in combination with a telescope and a synchronized scanning mirror. The new scanning system allows 360° surveillance. For simple interpretation of the results, the system is equipped with a video camera and the results of the analyses of the spectra are displayed by an overlay of a false color image on the video image. This allows a simple evaluation of the position and the size of a cloud. In order to allow simultaneous display of false color representations of measurement results and of the video image in real-time, a new scanner module has been developed. In the standard measurement mode, 16 two-sided interferograms per second are measured, analyzed, and the results are displayed. The spectral resolution is 4 cm"1. The new interferometer, the new scanning system, the data analysis method, and first results of measurements are presented.