Single-blackbody temperature-controlled MRTD (Minimum Resolvable Temperature Difference) field online automatic detection device and method for thermal imager

Abstract

The invention relates to a single-blackbody temperature-controlled MRTD (Minimum Resolvable Temperature Difference) field online automatic detection device and a method for a thermal imager. The automatic detection device comprises a single-blackbody temperature difference generator, an infrared collimating optical system, an image acquisition system and a microcomputer control and processing system. The detection method comprises the following steps that: the temperature of a surface source blackbody is firstly adjusted, so that the required infrared radiation temperature difference can be generated by a 4-bar target and the environment; the infrared radiation temperature difference is collimated by using a Cassegrain collimator tube and then enters the objective lens of a detected thermal imager; and imaged results are acquired by an image acquisition card and then are inputted to the microcomputer control and processing system, the calculation processing is carried out, and the calculated MRTD result is displayed, so that the automatic detection on the MRTD parameters of the detected thermal imager is achieved. The detection device provided by the invention has the advantages of small volume and little weight, guaranteed accuracy, simplicity and convenience in operation, and high degree of automation, and is applicable to the field online detection on the MRTD of infrared thermal imaging equipment.

Description

Technical field [0001] The invention relates to a photoelectric instrument measuring equipment, in particular to a thermal imager single black body temperature control MRTD field online automatic detection device and detection method. Background technique [0002] In recent years, infrared thermal imaging technology has developed rapidly, and infrared thermal imaging equipment has been used in almost every field. Infrared thermal imaging equipment has high technical content, precise structure and complex circuit system. Compared with general electromechanical instruments and equipment due to its structural process and technical characteristics, it has a higher failure rate objectively, so the performance parameters of infrared thermal imaging equipment Detection is particularly important. [0003] An important parameter for evaluating the performance of thermal imaging equipment is the minimum resolvable temperature difference (abbreviated as "MRTD"). MRTD is defined as: for the ...

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Problems solved by technology

[0007] The second purpose of the present invention is to provide a thermal imager single-black temperature-controlled MRTD field online automatic detection method to solve the problem of MRTD detection of infrared thermal imaging equipment in the field environment

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