A method and system for active lighting gas imaging detection
A gas imaging and active lighting technology, which is applied in the application of light to test fluid tightness, color/spectral characteristic measurement, etc., can solve the problems of poor detection sensitivity of infrared imaging gas, and achieve the effect of easy extraction and contrast improvement
Active Publication Date: 2019-11-19
南京南智芯光科技有限公司
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[0006] This application provides an active lighting gas imaging detection method and system to solve the problem of poor detection sensitivity of infrared imaging gas in the case of weak background light in traditional detection methods
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[0058] The embodiments will be described in detail hereinafter, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following examples do not represent all implementations consistent with this application. These are merely examples of systems and methods consistent with aspects of the present application as recited in the claims.
[0059] see figure 1 , which is a schematic flow chart of an active illumination gas imaging detection method of the present application, composed of figure 1 It can be seen that the active lighting gas imaging detection method provided by the present application includes the following steps:
[0060] S1: Emitting illumination laser light to the detection area through a tunable laser, and performing wavelength tuning on the illu...
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The invention provides an active illumination gas imaging detection method and system. The method comprises the steps of: firstly emitting illumination laser to a detection area through a tunable laser, and performing wavelength tuning on the illumination laser; then receiving the illumination laser after a gas in a detection area is absorbed through an infrared CCD to generate infrared image data; judging whether the detection area contains a leakage gas according to an illumination laser parameter and the infrared image data; and when the detection area contains the leakage gas, obtaining the concentration of the leakage gas in the detection area according to calculation. According to the method, gas absorption band laser is applied to active illumination, and the infrared imaging gas detection sensitivity is still high under the condition that the background light is weak. Moreover, wavelength tuning is performed while the wavelength tunable laser is applied to illumination, a gasabsorption peak is scanned, the contrast of gas imaging can be improved, and the gas diffusion range and concentration information are extracted more easily.
Description
technical field [0001] The present application relates to the technical field of gas detection, in particular to an active illumination gas imaging detection method and system. Background technique [0002] In the fields of daily life, industrial production and transportation, the leakage of harmful gases, such as natural gas, oil and other alkane flammable and explosive gases, will cause various hazards. In order to reduce the hazards of gas leakage, it is necessary to detect whether there is gas leakage in the area. Common gas detection methods mainly include: semiconductor type, catalytic combustion type, electrochemical type, and infrared type, that is, the gas concentration in the detection area is detected through the sensor under the corresponding principle. However, these sensors need to be in contact with the gas to detect, so that the detection range of these sensors is small and the response is slow. Therefore, gas detection can also be carried out by optical rem...
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IPC IPC(8): G01N21/39G01M3/38
CPCG01M3/38G01N21/39
Inventor 宁建于淑慧
Owner 南京南智芯光科技有限公司