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Proceedings Paper

Noncontact infrared temperature measurement using machine vision
Author(s): Fei Zhong; Tielin Shi; Tao He; Yuning Zhong
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Paper Abstract

Temperature monitoring is a common requirement; the thermocouples can accurately control the temperature of rotating and moving heated object, without touching it. Uncoated metal heaters are difficult for infrared sensors to measure reliably, the reflected infrared signals can change after a heated object surface is clean, the smog is rareness after the clean heated object has been burnt, when the surface is dirty and smeary, the smog is so dense that the measurement result would be influenced. In order to measuring the metal heater accurately, the measurement noise can be reduced by the machine vision. The Self-Organizing Maps (SOM) is an efficient tool for image processing. It projects input space on prototypes of a low-dimensional regular grid. In this paper a new image process technique has been validated against U-matrix method based on Euclidean distances between input vectors and neurons weights combined with the distribution of the fixed lattices in the network. SOM, as an unsupervised neural networks, is applied to pattern recognition and image processing. By analyzing and processing of the noise signals of the image, the characteristic parameters which represent operating state of the heated object are extracted to construct characteristic vector and used to train SOM. The trained results can be used to modify the sensor testing value. A new image processing scheme based on the use of the organization property of Kohonen maps are presented in this paper, the image processing result can be correct the non-contact infrared temperature measurement.

Paper Details

Date Published: 13 October 2006
PDF: 6 pages
Proc. SPIE 6280, Third International Symposium on Precision Mechanical Measurements, 62803Q (13 October 2006); doi: 10.1117/12.716329
Show Author Affiliations
Fei Zhong, Hubei Univ. of Technology (China)
Huazhong Univ. of Science and Technology (China)
Tielin Shi, Hubei Univ. of Technology (China)
Huazhong Univ. of Science and Technology (China)
Tao He, Hubei Univ. of Technology (China)
Huazhong Univ. of Science and Technology (China)
Yuning Zhong, Hubei Univ. of Technology (China)
Huazhong Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 6280:
Third International Symposium on Precision Mechanical Measurements
Kuang-Chao Fan; Wei Gao; Xiaofen Yu; Wenhao Huang; Penghao Hu, Editor(s)

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