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Method for extending temperature measuring range of refrigeration type 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: 2015-02-18
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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  • Method for extending temperature measuring range of refrigeration type 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 extending the temperature measuring range of a refrigeration type temperature measuring system, and belongs to the technical field of image processing. The method comprises the steps that firstly, the corresponding linear interval of a detector is set according to relevant parameters of the refrigeration type detector; then, cumulative histogram counting is conducted on images to determine the smallest gray value G1 in the images and the largest gray value Gh in the images; whether the largest gray value Gh and the smallest gray value G1 are within the range of the corresponding linear interval of the detector or not is judged, and if not, integral times of the detector are adjusted to enable the gray values in the images to be kept within the corresponding linear interval of the detector. According to the method, the gray values in the images are kept within the corresponding linear interval of the detector by changing the integral times effectively in real time, the measuring range of the refrigeration type temperature measuring system is extended while high temperature measuring precision is guaranteed, and meanwhile the algorithm is easy to realize, small in calculated amount and capable of being applied to projects in real time easily.

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 ...

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Application Information

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Patent Type & Authority Applications(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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