A gas leakage concentration quantitative detection device and method based on infrared thermal imaging technology

Abstract

The invention discloses a gas leakage concentration quantitative detection device and method based on infrared thermal imaging technology. The device includes a passive infrared thermal imager, and a concentration-measurement value quantitative relationship model is pre-stored in the passive infrared thermal imager. A portable standard infrared gas chamber is replaceably installed in the front. During on-site detection, this method uses a passive infrared thermal imager to collect three sets of data respectively, namely the infrared image of the leakage point, the infrared image of the non-leakage scene, and the installation of a standard infrared thermal imager. For the infrared image of the non-leakage scene behind the gas chamber, the passive infrared thermal imaging camera can calculate the gas concentration at the site leakage point in real time based on these three sets of data and combined with the concentration-measurement value quantitative relationship model.

Description

technical field [0001] The invention relates to the field of gas detection, in particular to a gas leakage concentration quantitative detection device and method based on infrared thermal imaging technology. Background technique [0002] In petrochemical and other industries, there are a large number of dangerous gas storage or transportation equipment with complex structures. Effective monitoring of the leakage of these equipment is an important prerequisite for ensuring safe production. At present, contact leak detection equipment is widely used, and the sensor of the equipment needs to be in contact with the detection target gas to detect the leakage. However, some leaking points may be leaking, but most of the potential leaking points have not leaked yet, so the operator must personally check and detect each potential leaking point, which is very inefficient and will cause harm to the health and safety of the inspectors. harm. [0003] At present, the infrared thermal ...

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Problems solved by technology

However, it is still inefficient to search for leaks in the case of using this non-contact laser gas detector alone, and the real leak can only be found by detecting all possible leaks one by one

[0009] Through the above, it is not difficult to find that if the quantitative detection of the leaked gas concentration is to be realized at the same time, the thermal imaging camera for gas leak detection must be used in conjunction with at least one set of auxiliary equipment such as a contact electrochemical sensor or a non-contact laser gas detector. The number of equipment is large, the volume is large, and it is difficult to carry, which brings a lot of inconvenience to the on-site operation

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