Gas Detection Infrared Imager

In recent years,gas leakage accidents have occurred repeatedly and caused serious consequences.Most dangerous gases are not easy to detect with the naked eye.Therefore,it is essential to invent an instrument that can image dangerous gases.In industrial production,explosions and fires caused by gas leaks cause serious personal and property losses every year.To solve this problem,gas detection technology has developed rapidly in recent years.Gas infrared imaging detection technology has become a research hotspot in the field due to its advantages such as the ability to quickly locate the source of leakage,the large detection range,the variety of dangerous gases that can be detected,and the ability to detect long distances.This subject uses uncooled infrared detectors combined with multiple filters to detect a variety of dangerous gases,and realizes the visual detection of a variety of toxic and harmful gases in the long wave band.Non-uniformity correction is performed on the collected image to improve the infrared image quality.(1)The infrared gas imaging principle is analyzed.From a microscopic point of view,the physical characteristics and vibration of infrared absorption of gas molecules are described,which provides a basis for the influence of atmospheric absorption of infrared waves.The atmospheric window is introduced and its application in the visual detection of dangerous gases is analyzed.The layer radiation transmission model of gas leakage passive infrared imaging is established,and the layer radiation transmission model is simplified.(2)Introduce the overall program flow,analyze the optical module and video processing module in detail,and develop and design a gas detection infrared imager capable of rapid imaging and real-time detection of gas leakage.The device can realize high-sensitivity imaging detection of a variety of dangerous gases in the imaging range of 8?14?m infrared radiation band.(3)The basic theory of non-uniformity correction algorithm and histogram infrared enhancement algorithm is expounded,and the overall architecture of infrared image processing module is studied.By processing the collected infrared images,non-uniformity correction,image noise reduction and image detail enhancement are realized,and the quality of infrared images is improved.(4)Aiming at the problem that the current gas leak infrared imaging detection system performance evaluation method cannot realize the comprehensive consideration of gas infrared absorption characteristics,gas temperature and concentration and other influencing factors,the minimum distinguishable gas concentration of gas leak infrared imaging detection is studied MRGC performance evaluation model;designed the MRGC performance test system of the gas leak infrared imaging detection system,and realized the measurement of the MRGC evaluation index of the gas leak infrared imaging detection system.