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Method for measuring thickness of rigid transparent material with laser

A technology of laser thickness measurement and transparent materials, which is applied in the direction of measuring devices, optical devices, instruments, etc., can solve problems affecting production efficiency and achieve the effect of improving quality and production efficiency

Inactive Publication Date: 2011-06-15
GUANGDONG FUSHAN GLASS MACHINERY +1
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Problems solved by technology

At present, when the optical measurement method is used for on-line measurement of thickness, it is usually necessary to stop the production line or use an auxiliary structure to grasp the material, so that the material stops at the designated position for measurement, which greatly affects the production efficiency

Method used

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  • Method for measuring thickness of rigid transparent material with laser
  • Method for measuring thickness of rigid transparent material with laser
  • Method for measuring thickness of rigid transparent material with laser

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] Such as figure 1 As shown, after the position of the laser light source 1 is fixed, the incident angle of the laser beam is a constant value, the material refraction angle It varies according to the difference in material composition, but the same material for a certain value. Suppose the refractive index of the material 6 to be tested is K, the thickness of the material is T, and the horizontal distance between the two bundles of parallel rays reflected and refracted on the upper and lower surfaces of the material is A. For the convenience of calculation, the laser incident angle is adjusted as . Then the calculation method of the material thickness T at this time is as follows:

[0023] ;

[0024] ;

[0025] (1)

[0026] in:

[0027]

[0028] From equation (1), it can be seen that the thickness T of the ...

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Abstract

The invention provides a method for measuring the thickness of a rigid transparent material with laser. The method comprises the following steps of: 1) adjusting the position of a laser source and a vertical distance from the laser source to a roll gang, and adjusting the horizontal and the vertical distances between the laser source and a sensor so that light spots can be generated on the sensor after the laser illuminates a material to be measured; 2) when the material to be measured passes through a measuring system, detecting that the material to be measured is in a thickness measurement state, by the sensor; 3) after the laser source emits laser beams to illuminate the material to be measured, forming ribbon-shape light spots on the sensor after optical conduction, collecting a light spot image by an image acquisition card, and transmitting the image to a processor for image analysis; and 4) analyzing the light spot image on the sensor by the processor to obtain the width A of the light spots, and calculating the thickness of the measured material according to the following calculation formula in the specification. In the invention, the thickness of the measured material can be measured accurately without stopping of the production process, the measured material can not be damaged due to adoption of a contactless measurement method, and the quality of the product and the production efficiency are improved.

Description

technical field [0001] The invention relates to a method for measuring the thickness of a transparent flat material, in particular to a method for measuring the thickness during the moving process of the transparent flat material. Background technique [0002] In the production and deep processing of transparent flat materials, it is necessary to accurately measure the thickness of the material. At present, most domestic manufacturers still use traditional contact measuring devices to measure the thickness of such materials. This measurement method is difficult to sample, has low precision, consumes manpower and material resources, and has a serious lag in grasping the change of material thickness. The biggest advantage of the optical measurement method is that it is non-contact, fast, and can be used for continuous measurement. It can be used in some measurement places with harsh environments. At present, when the optical measurement method is used for on-line thickness me...

Claims

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Application Information

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IPC IPC(8): G01B11/06
Inventor 李礼开程良伦易斌黄卫平范树新黄双欢
Owner GUANGDONG FUSHAN GLASS MACHINERY
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