Performance evaluation device and method for gas leakage infrared imaging detecting system

Abstract

The invention provides a performance evaluation device for a gas leakage infrared imaging detecting system. The performance evaluation device comprises an air chamber with infrared windows, a facial differential blackbody radiation source, a gas concentration sensor, a temperature sensor, a pressure sensor and a collimating optical system. The facial differential blackbody radiation source comprises a target blackbody and a background blackbody, wherein the air chamber is arranged between the target blackbody and the background blackbody. The gas concentration sensor, the temperature sensor and the pressure sensor are arranged in installation holes in the side wall of the air chamber. The background blackbody is located on the focal plane of the collimating optical system. The front face and the rear face of the air chamber are respectively provided with one infrared window. The side wall of the air chamber is provided with an air inlet hole and an air outlet hole. The background blackbody is provided with a hollowed-out area for forming a target pattern with spatial frequency being fx. The temperature of the target blackbody can be controlled and is used for forming temperature difference between the target blackbody and the background blackbody. By increasing concentration of gas to be detected in the air chamber continuously, the performance evaluation device can comprehensively evaluate the temperature resolution and the spatial resolution of the system.

Description

technical field [0001] The invention belongs to the technical field of gas detection, and in particular relates to a performance evaluation device and method of a gas leakage infrared imaging detection system. Background technique [0002] Although there are a variety of sensors used for gas leak detection with different principles, traditional gas sensors generally use fixed-point or alignment measurement methods. It is very time-consuming and labor-intensive to achieve large-scale dynamic detection, and is easily affected by gas diffusion. Due to the influence of wind and other weather factors, the accuracy of the test results is difficult to guarantee. In addition, due to the contact principle of traditional gas sensors, many target locations to be detected cannot be reached, and its operation safety is greatly reduced. Considering that most industrial harmful gases have characteristic absorption spectra in the medium-wave or long-wave infrared band, the spectral detecti...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of the prior art, in order to solve the problem of performance evaluation of gas infrared imaging detection system, to provide a performance evaluation device and method of gas leakage infrared imaging detection system

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