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Ocean weather environment parameter computing method based on infrared thermal imaging system

A technology of infrared thermal imaging and environmental parameters, applied in the field of photoelectric detection, can solve problems such as low solution accuracy, and achieve the effect of improving accuracy

Active Publication Date: 2017-10-20
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

This method combines the real-time sea-sky infrared image and the actual atmospheric influence factors to achieve the effect of accurately solving the effect of the thermal imaging system's operating distance, and overcomes the problem of low solution accuracy caused by the traditional operating distance equation that cannot use real-time images and real-time atmospheric transmittance

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  • Ocean weather environment parameter computing method based on infrared thermal imaging system
  • Ocean weather environment parameter computing method based on infrared thermal imaging system
  • Ocean weather environment parameter computing method based on infrared thermal imaging system

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Embodiment Construction

[0024] The working process of the present invention will be further described below in conjunction with accompanying drawings and examples.

[0025] In this example, the parameters of the long-wave infrared thermal imaging system are as follows: the focal length of the detector is f=10mm, the F-number is 1.4, the field of view is 7°×5.2°, the response band is 7.5-13.5μm, and the number of pixels is 640× 512, pixel size is 15×15μm, NETD≤50mk. The specific implementation process of the whole example is as follows:

[0026] Step 1: Establish an improved range solution model

[0027] The traditional operating distance equation is as follows:

[0028]

[0029] In the formula, f is the spatial characteristic frequency of the target; h is the target height; N e The number of equivalent strips required to find, locate, identify and recognize the target according to the Johnson criterion; R is the distance of the target; ΔT is the apparent temperature difference between the targe...

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Abstract

The invention belongs to the technical field of photoelectric detection, and discloses an ocean weather environment parameter computing method based on an infrared thermal imaging system. Key parameters, such as atmospheric transmissivity, atmospheric path radiation and atmospheric contrast transfer function, of atmospheric environment can be inverted according to a real-time ocean weather image, and thus an effective operating distance of the infrared thermal imaging system to a specific target can be computed according to the key environment parameters. The method provided by the invention has the advantages that a traditional operating distance solving model is effectively improved, the operation of inverting the real-time atmospheric environment parameter according to the infrared image is firstly introduced, the limitation that a traditional operating distance equation does not consider real-time atmospheric influence is broken, and thus prediction accuracy of the infrared thermal imaging system to the target operating distance is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of photoelectric detection, and relates to the detection of long-distance targets under the sea-sky background, and the inversion of real-time parameters of the sea-sky environment based on an infrared thermal imaging system. Background technique [0002] Infrared thermal imaging system plays an increasingly important role in the field of military detection, so the research on the performance evaluation of infrared thermal imaging system is getting more and more in-depth. The working distance to a specific target is an important parameter to evaluate the performance of an infrared imaging system. The working distance of infrared imaging system is not only related to system performance, but also related to real-time atmospheric influence, observation target and background radiation characteristics. [0003] The relevant Chinese patent (CN101320475) discloses a method for predicting the range of an infrared im...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00G01J5/48G01J5/00
CPCG01J5/00G01J5/48G01J2005/0077G16Z99/00
Inventor 邵龙白廷柱王全喜郑海晶何恒
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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