Aiming at the problems of low efficiency

precision

and that the leak location cannot be accurately calibrated in ethylene gas leakage detection

present a method for detecting ethylene gas leakage based on multiple features combination of infrared imaging. Firstly

Infrared image of the production workshop is obtained by the infrared camera

and the suspected area is obtained by the method of the combination of frame difference and background difference; secondly

the statistics features and the wavelet energy variation characteristics of gas leakage imaging in suspected area is analyzed to find out the feature threshold; finally

the multiple feature threshold conditions is combined together

to determine whether there is leakage. The experimental results show that this method is accurate

efficient and real-time

and the leak detection accuracy rate reaches 95. 6 %.