High-Speed Multispectra Infrared Digital Video System to Measure the ReactionFronts of Solid Propellants

摘要

The work was to design a new multispectra infrared (MS-IR) digital imaging systemby employing multiple parallel processing focal plane detector arrays (FPDA) and spectrometry to measure the reaction front of impacted solid propellants. The new system is a high-speed spectral IR spectroscopic digital imaging system operated by a desk-top computer and the raw data will be processed by using our user-friendly software package. The new system with a magnification ratio of 11.271 will enable us to capture IR images of objects (with size as small as 2-4 micrometer) at variable framing rates, as high as 20 million frames/sec, up to four successive digital images; it will also allow us to determine tha apparent distributions of temperature and water vapor through the line-of-path. The system will equipped with both calibration and synchronization devices so that the events taking place in a sample with about 1 sq mm size under sudden impact can quantitatively determined. The new system has an object mirror with f/1.0 having diameter of over 150mm so that we can use the system on various apparatus including a drop-weight setup or a gas-gun facility.