A method and device for measuring the surface temperature of an object based on visible light photos
An object surface, visible light technology, applied in the field of image recognition, can solve the problem of small temperature measurement range on the object surface, and achieve the effect of solving installation and maintenance difficulties, facilitating operation, and improving reliability.
Active Publication Date: 2020-08-18
HUAZHONG UNIV OF SCI & TECH
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[0006] In view of the defects of the prior art, the object of the present invention is to provide a method and device for measuring the surface temperature of an object based on visible light photos, aiming to solve the problem that the existing visible light band has a small range of object surface temperature measurement
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[0065] Choose fixed regions of different sizes and repeat the learning and verification process.
[0066] The calculated results are shown in Table 1:
[0067] Table 1
[0068] area mean variance 200*200 47.88 400*200 3.52 600*200 0.976 800*200 0.614 1000*200 0.3862 1000*400 0.1204 1000*600 0.0437 1000*800 0.0432 1000*1000 0.0427 1000*1200 0
[0069] Choosing different fixed regions of the image can optimize the model, and the larger the region size, the smaller the average variance.
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The invention discloses a method and device for measuring the surface temperature of an object based on visible light photos. The method includes firstly obtaining an optimized temperature recognition model for object surface temperature recognition based on visible light photos through training, and collecting the temperature of the surface of the object to be measured at an unknown temperature. Visible light photos, the three-primary gray frequency distribution information of the visible light photos is extracted and input into the temperature recognition model to obtain the surface temperature of the object to be measured. The device includes an image acquisition system for acquiring visible light photos and an image processing system for acquiring object surface temperature. The invention is suitable for measuring the surface temperature of objects at room temperature in the visible light band, has a simple structure and is easy to operate, and solves the problem that traditional contact temperature measuring tools are difficult to install and maintain, and cannot be used in harsh environments. And compared with the existing visible light image temperature measurement technology that can only be used for high-temperature objects, it effectively expands the measurement range of the visible light image temperature measurement technology.
Description
technical field [0001] The invention belongs to the technical field of image recognition, and more specifically relates to a method and device for measuring the surface temperature of an object based on visible light photos. Background technique [0002] In the field of industrial control and process monitoring, temperature is an important parameter reflecting the state of objects. There are many ways to measure temperature. According to the positional relationship between the sensor and the measured object, it is usually divided into two categories: contact temperature measurement and non-contact temperature measurement. [0003] Thermocouples and RTDs are typical contact temperature measurement tools with accurate measurement results and low measurement costs. However, the dynamic performance is poor, and the range of the measured object is limited, such as some corrosive or too high temperature objects are not suitable for contact temperature measurement. [0004] Non-c...
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IPC IPC(8): G01J5/50G01J5/00
CPCG01J5/03
Inventor 叶齐政王明
Owner HUAZHONG UNIV OF SCI & TECH
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