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Near infrared spectrum detection method for insulation coating layer thickness of silicon steel

A near-infrared spectroscopy and near-infrared spectrometer technology is applied in the field of thickness detection of cold-rolled silicon steel insulation coating, which can solve problems such as application blanks and achieve the effect of expanding the application field.

Inactive Publication Date: 2012-07-04
SHANXI TAIGANG STAINLESS STEEL CO LTD
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Problems solved by technology

Although near-infrared spectroscopy has been widely used in many fields, its application in the metallurgical industry is still blank, and there is no precedent for using near-infrared spectroscopy to detect the thickness of silicon steel coatings

Method used

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  • Near infrared spectrum detection method for insulation coating layer thickness of silicon steel
  • Near infrared spectrum detection method for insulation coating layer thickness of silicon steel
  • Near infrared spectrum detection method for insulation coating layer thickness of silicon steel

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Embodiment Construction

[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings and the embodiments completed by the inventors according to the above-mentioned technical solutions. The following examples are only preferred examples, and the present invention is not limited to these examples.

[0020] The silicon steel insulating coating to be tested in this example is an environmentally friendly semi-organic coating with a thickness in the range of 1.02 μm-1.98 μm. The standard value of each insulating coating thickness of the silicon steel sample is obtained by a coating thickness gauge based on the electromagnetic method, and the near-infrared spectrum of the sample insulating coating is obtained by scanning with an AOTF near-infrared spectrometer. The near-infrared spectrum of the layer realizes the detection of the thickness of the silicon steel coating.

[0021] 1. Near-infrared characteristic absorption spectrum of insulating coating...

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Abstract

The invention discloses a near infrared spectrum (NIR) detection method for insulation coating layer thickness of silicon steel. The method is characterized in that an acousto-optic tunable filter (AOTF) NIR analyzer is used for acquiring the NIR of an insulation coating layer of a silicon steel surface, a sample database containing insulation coating layer NIR and coating layer thickness standard value is created, an insulation coating layer thickness analytical mode which is composed of a pre-processing module and a kernel partial least square (KPLS) module is created based on the insulation coating layer sample database, NIR data of the sample database is input into the pre-processing module, the output of the pre-processing module is input into the KPLS module, the thickness value of the insulation coating layer is output after processing, and acquired NIR data of the insulation coating layer of the silicon steel surface is input into the insulation coating layer thickness analytical mode to obtain the thickness value of the insulation coating layer. The invention expands the application field of the NIR analyzer, realizes the thickness detection of semi-organic insulation coating layer of silicon steel surface, has the advantages of high speed, accuracy and reliability, and the like.

Description

technical field [0001] The invention relates to a method for detecting the thickness of an insulating coating on cold-rolled silicon steel, in particular to a method for detecting the thickness of an insulating coating based on an acousto-optic tunable filter (Acousto-optic Tunable Filter, abbreviated as AOTF) near-infrared spectrometer. Background technique [0002] Non-oriented silicon steel is widely used as the core material of motors and transformers. In order to reduce the power loss between silicon steel layers, ensure that the silicon steel sheet has a high surface resistivity, and protect the silicon steel from erosion and rust of various corrosive media, it is necessary to coat a thin layer of inorganic and organic resin on the surface of the silicon steel. composed of insulating coatings. The performance of silicon steel insulation coating has very strict technical requirements, and thickness is one of the important technical indicators. There are two main non-d...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/06
Inventor 郝惠敏马莹郝俊宇乔聪明赵建宏杨斌刘雅俊
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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