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MRTD (Minimum Resolvable Temperature Difference)-based gas infrared imaging detection system performance evaluation method

An infrared imaging and detection system technology, applied in measurement devices, material analysis by optical means, instruments, etc., can solve the problem of high cost of gas infrared imaging detection system, achieve strong application promotion value, solid theoretical foundation, avoid construction and The effect of the experimental procedure

Active Publication Date: 2013-10-09
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects of the prior art, in order to solve the problem of high cost of gas infrared imaging detection system performance evaluation, provide a kind of gas infrared imaging detection system performance evaluation method based on MRTD

Method used

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  • MRTD (Minimum Resolvable Temperature Difference)-based gas infrared imaging detection system performance evaluation method
  • MRTD (Minimum Resolvable Temperature Difference)-based gas infrared imaging detection system performance evaluation method
  • MRTD (Minimum Resolvable Temperature Difference)-based gas infrared imaging detection system performance evaluation method

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Embodiment Construction

[0025] Explanation of the principle: For a certain gas infrared imaging detection system based on thermal detectors, what affects the response signal of the detector is the difference ΔM between the radiation output of the target and the background t-b , which is expressed as shown in formula (3),

[0026] Δ M t - b = ∫ λ 1 λ 2 [ ϵ t ( λ ) M ( λ , T t ) - ϵ b ( λ ) M ( λ , T b ) ...

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Abstract

The invention discloses an MRTD (Minimum Resolvable Temperature Difference)-based gas infrared imaging detection system performance evaluation method, belonging to the field of gas detection technologies. The method comprises the steps of: firstly, determining a calculation analytic expression of the radiant exitance difference of a target and the background; then according to the analytic expression, respectively deducing and calculating the radiant exitance difference of the target and the background by using MRTD (Minimum Resolvable Temperature Difference) and MRGC (Multi Row Graphite Core) testing devices and methods; secondarily, enabling the radiant exitance differences of the two conditions to be equal, and calculating the gas transmittance; finally, resolving a performance evaluation parameter MRGC value of a gas infrared imaging system through the gas transmittance. The calculating method not only fully combines the gas infrared absorption characteristic imaging factor to realize the temperature resolving power of the system and the comprehensive evaluation of the space resolving ability, but also avoids the building and laboratory operation processes of a complicated testing system, and is firm in theoretical basis, thus having extremely strong application and popularization values.

Description

technical field [0001] The invention belongs to the technical field of gas detection, and in particular relates to a method for evaluating the performance of a gas infrared imaging detection system based on a minimum resolvable temperature difference MRTD. Background technique [0002] With the continuous improvement of thermal imaging technology and the performance of related components, gas infrared imaging detection technology has attracted the attention of more and more countries and researchers. Developed countries such as the United States and France are developing and applying gas infrared imaging detection systems. Aspect has been at the forefront of the world, and its related products have also occupied most of the gas infrared imaging detection market. In recent years, with the further expansion of market demand, other countries including China are also constantly launching their own new products. At present, the evaluation methods for the performance of gas infra...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/00
Inventor 李家琨金伟其王霞顿熊金明磊夏润秋李力
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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