Infrared Imaging based Method for Real-Time Location of Heavy Gas Leakage
For the urgent need for the monitoring of heavy gas leakage in rocket fuel storage and the limitations existing methods have in sensitivity,real-time response and precise location,the paper presents an infrared imaging based method for real-time localization,in which the absorption properties of heavy gases in certain infrared wavelengths are utilized,8～14 μm infrared sensors and lenses are employed to capture images,and a special passive calibration plate is designed for tuning the system.By contrasting backgrounds and selecting various features,the detection accuracy reaches 98.3％.By combining dynamic analysis of the changing density of leakage spots across the consecutive frames with the pre-calibrated data by the system,the location errors is below 3％.On 30FPS video streams,the processing speed is 27.3 frames per second and the whole process takes less than 1.5s on average,ensuring real-time location of gas leakage.This study offers robust support for safety management of rocket fuel facilities.
heavy gas leakageinfrared imaging technologymultidimensional feature selectionsystemic calibrationreal-time positioning
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