Discussion On The Method Of Detecting Airtightness Of Infrared Thermal Imaging

In recent years, the airtight detection of sealed devices have been focused by many enterprises, which has been seen as an important technical index of quality. If the sealing is not well, it is going to bring leakage, low efficiency, and abnormal operation. Sometimes it can even bring environmental pollution problems and production safety problems. Thus, the airtight detection of sealed devices is very important.With the development of science and technology level and the increasing competition in the market, manufacturers need airtight detection equipments which are more efficient, convenient and intelligent. Therefore, at present, how to develop a more quick, convenient and efficient system of leak positioning device has become the hot topic in research institutions of airtight detection at home and abroad. In recent years, the infrared thermography detection technology has been widely valued because of its advantages of the fast response speed, the wide measuring range and the non-contact measurement. The infrared thermography detection technology is irreplaceable by other nondestructive testing technology, so the promotion of infrared thermography detection technology is very necessary in airtight detection.This article is mainly to explore the infrared thermography detection technology used in airtight detection. Firstly, through the knowing of the technology and the development of air tightness detection and the infrared thermal imaging detection, the infrared thermal imaging technology is put forward for air tightness test. Secondly, through the theoretical analysis and Fluent software simulation of the leak of hot gas, the principle of infrared gas tightness detection system is established. Again, air tightness test of infrared thermal imaging technology is discussed in this paper from the conditions of infrared gas tightness test, the heat map analysis technology and the automation of detecting process.Finally, it chooses the appropriate instruments and the experimental platform is built.Using the platform, it analyzes the leakage of specimen which are flawed, it sets up corresponding detection methods and detection technology, it analyzes the temperature field of leak, it explores the best test conditions and test methods for the location of leaking point, in order to provide the theory basis for the application of infrared thermography detection technology in airtight detection of industrial products.