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Atmospheric absorption band infrared radiant luminance calibration method, apparatus and system

A technology of infrared radiation and atmospheric absorption, applied in radiation pyrometry, measuring devices, optical radiation measurement, etc., can solve the problem of lack of atmospheric absorption band calibration method, etc., to achieve the effect of expanding quantitative test bands

Inactive Publication Date: 2019-12-20
BEIJING INST OF ENVIRONMENTAL FEATURES
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method, device and system for calibrating the infrared radiance of the atmospheric absorption band in view of the lack of an effective atmospheric absorption band band calibration method in the prior art

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  • Atmospheric absorption band infrared radiant luminance calibration method, apparatus and system
  • Atmospheric absorption band infrared radiant luminance calibration method, apparatus and system
  • Atmospheric absorption band infrared radiant luminance calibration method, apparatus and system

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Embodiment Construction

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0039] The invention provides a method for calibrating the infrared radiation brightness of the atmospheric absorption band, which obtains the calibration curve of the infrared thermal imager in the typical atmospheric absorption band band, and converts the infrared thermal imaging data of the atmospheric absorption band band into data that ca...

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Abstract

The present invention relates to an atmospheric absorption band infrared radiant luminance calibration method, apparatus and system. The method comprises: aligning a thermal imager light path axis with a central position of a black body, adjusting a relative position between a thermal imager and a black body and a black body temperature, collecting infrared images of different black body temperatures at different relative positions; reading infrared image gray values of a same black body temperature obtained at the different relative positions, establishing a first relational expression between a relative position and an infrared image gray value, and determining an infrared image gray value at a thermal imager detector actinal surface at different black body temperatures; establishing a second relational expression between a black body temperature and an infrared image gray value at the thermal imager detector actinal surface, and converting the second relational expression into a correspondence between an infrared image gray value and an infrared radiant luminance, so as to obtain an infrared thermal imager calibration curve. According to the atmospheric absorption band infraredradiant luminance calibration method, apparatus and system, the calibration curve is constructed, so that quantitative analysis processing on wave band infrared radiation characteristic data of a target in a typical atmospheric absorption band is implemented.

Description

technical field [0001] The invention relates to a method for calibrating an infrared thermal imager, in particular to a method, a device and a system for calibrating infrared radiation brightness in an atmospheric absorption band. Background technique [0002] All living and non-living objects above absolute zero are constantly radiating infrared rays. Infrared radiation is a kind of electromagnetic radiation, which is emitted and absorbed in the form of light quanta. The infrared band includes three atmospheric windows, which are 2 μm to 2.5 μm, 3 μm to 5 μm, and 8 μm to 14 μm. In the atmospheric window, the atmosphere absorbs less infrared rays, so most infrared systems use the atmospheric window band. [0003] Infrared thermal imaging camera is a technical device used to detect the infrared radiation of the target object and visualize the temperature distribution of the target object instantaneously by means of photoelectric conversion and electrical signal processing. T...

Claims

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Application Information

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IPC IPC(8): G01J5/00
CPCG01J5/00G01J5/80
Inventor 万继敏
Owner BEIJING INST OF ENVIRONMENTAL FEATURES
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