A Method of Extending the Temperature Measuring Range of Refrigeration Temperature Measuring System

A cooling type and range technology, applied in the field of image processing, can solve problems such as limited temperature measurement range, and achieve the effect of small calculation and simple algorithm implementation

Active Publication Date: 2017-12-15
LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for expanding the temperature measurement range of the refrigeration type temperature measurement system to solve the problem that the temperature measurement range of the existing refrigeration type temperature measurement system is limited

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  • A Method of Extending the Temperature Measuring Range of Refrigeration Temperature Measuring System

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Embodiment Construction

[0023] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0024] The linear interval of the detector is an interval of the output response amplitude of the detector to the infrared radiation. For the same infrared radiation energy, the output response amplitude of the detector is different under different integration times. That is, the higher the integration time, the larger the response amplitude. By modifying the integration time, the output response amplitude of the detector corresponding to the external radiation is increased or decreased, so that the corresponding amplitude is within the linear range of the detector.

[0025] The invention judges the maximum and minimum gray levels of images by accumulating the histogram domain value, and effectively removes the influence of blind pixels or noise on the gray value judgment on the image. By effectively increasing and reducing the integration ...

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Abstract

The invention relates to a method for expanding the temperature measurement range of a refrigeration type temperature measurement system, which belongs to the technical field of image processing. The present invention first sets the corresponding linear interval of the detector according to the relevant parameters of the cooling type detector; then performs cumulative histogram statistics on the image to determine the minimum gray value Gl and the maximum gray value Gh in the image; judge the maximum gray value Gh and whether the minimum gray value G1 is within the range of the corresponding linear interval of the detector, if not, adjust the integration time of the detector so that the gray value in the image remains within the corresponding linear interval of the detector. The invention keeps the gray value in the image within the corresponding linear interval of the detector by effectively changing the integration time in real time, ensuring high temperature measurement accuracy and expanding the temperature measurement range of the refrigeration temperature measurement system, and at the same time the algorithm realizes It is simple, and the amount of calculation is small, which is beneficial to the real-time application of engineering.

Description

technical field [0001] The invention relates to a method for expanding the temperature measurement range of a refrigeration type temperature measurement system, which belongs to the technical field of image processing. Background technique [0002] Infrared testing technology has been widely used. The existing thermal imaging cameras for temperature measurement are mainly uncooled thermal imaging cameras. Due to the limitation of performance parameters of uncooled thermal imaging cameras, it is difficult to improve the temperature measurement accuracy, while cooling thermal imaging cameras have better performance. Performance parameters, used to measure temperature can achieve very high accuracy, but the dynamic range of the cooling type thermal imager is limited, and the temperature measurement range is limited. The method of measuring the temperature range of the temperature system. Contents of the invention [0003] The purpose of the present invention is to provide a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J5/00
Inventor 毛义伟孙小亮赵凯生汪江华
Owner LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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