The way of measuring plantamnesty sheet material

 

We propose a method of measuring plantamnesty sheet material, representing the dimension of the width of the distribution of light projected on the surface of the sheet material in the form of concentric rings placed one inside the other, received from at least 2 light sources, are displaced relative to each other in the vertical direction, while planchenoit sheet of material is defined as the difference between the heights of the individual sections of sheet material, as defined by the following expression: Hi=L1-L0(X0i/X1i-1), where L0- the distance (in mm) from the reference plane to the light source 1; L1- the distance (in mm) from the reference plane to the light source 2; X0i- the width of the i-th projection of the beam (in pixels) on the surface of the sheet material from the light source 1; X1i- the width of the i-th projection of the beam (in pixels) on the surface of the sheet material from the light source 2; i - number of a single projection of the beam on the surface of the sheet material. The technical result - improving the accuracy and reliability of measurements of sheet material, the improvement of product quality. 3 Il.

The invention relates to opto-electronic methods oehh metallurgical production and production of flat-rolled technologies.

There is a method of determining plantamnesty moving strip of sheet metal (see “Telemetry system for measuring the flatness of hot-rolled strip in-line”, Zh. Ferrous metals, September-October 1998 UDC. 621.771.23-418.25; 621.771.23.019).

The method is based on measuring the straightness and the density of the bands allocated to the measuring device (digital camera). Lines are drawn using the projector, projecting cross reference strip for a distance equal to the width of the sheet, and a longitudinal strip with a length of about 2 m

The disadvantages of this method are the low accuracy of measurement arising from uneven spectral radiation. Reducing the precision and accuracy of the data with the measurements of sheet material under conditions of severe vibration, and also due to the fact that the measurement of plantamnesty boils down to the averaged measurement of cell size, which makes the process of measuring plantamnesty discrete.

Closest to the proposed invention is a method for determining the flatness of a moving strip of material (Patent No. 2119643, IPC 6 G 01 B 7/34, 11/24, 21/20, publ. 1998).

The method is based on measuring the angle formed by the lines of intersection of a plane tangent to p the Loos, with the plane passing through the measurement point and located along the direction of movement of the strip perpendicular to the plane tangent to the support elements, which moves the strip, and are determined by the relative elongation of the tape longitudinal sections of the bands allocated to the measuring device.

The disadvantages of this method are the reduction in the reliability and accuracy of measurement of plantamnesty due to the fact that the measurement is made in relative coordinates, which requires additional configuration for measuring plantamnesty sheet material in absolute coordinates. Deteriorates the accuracy and reliability of the data measured in conditions with variable speed, because the measurement with this method depends on the constancy of the velocity of the moving sheet material.

The technical result - improving the accuracy and reliability of measurements of sheet material, the improvement of product quality.

To achieve a technical result in the proposed method of measuring plantamnesty sheet material, including the measurement of the width of the distribution of light projected on the surface of the sheet material, measure the width of the distribution of light projection, p light projection in the form of concentric rings, located one inside the other, with planchenoit sheet of material is defined as the difference between the heights of the individual sections of sheet material, as defined by the following expression:

Hi=L1-L0/(X0i/X1i-1),

where L0- the distance (in mm) between the light sources;

L1- the distance (in mm) from the reference plane to the light source 2;

X0i- the width of the i-th projection of the beam (in pixels) on the surface of the sheet material from the light source 1;

X1i- the width of the i-th projection of the beam (in pixels) on the surface of the sheet material from the light source 2;

i - number of a single projection of the beam on the surface of the sheet material.

The method is illustrated by drawings

Fig.1. Views define the height of a single line section of sheet material.

Fig.2. View of the light projection on the surface naplavlennogo plot sheet material.

Fig.3. An example of a specific plantamnesty plot sheet material.

The method is as follows.

The light from the light source 1 located at a distance of L0from the light source 2, falls on the surface 3 forming the light projection in the form of a ring, thus forming a distribution of light projection of roccii to the border of light projection in the first direction, obtained from source 1. The light from source 2 located at a distance of L1from the reference plane 4, falls on the surface 3 forming the light projection in the form of a ring, thus forming a distribution of light projection in the i-th direction of a width of X1iinside the light projection x0i. Under the width of the projection of X1irefers to the distance from the center of the light projection to the boundary of light projection in the i-th direction, obtained from source 2. The ratio of the widths of the light projections X0iand X1ishows the change in the height Hia single section of sheet material measured surface 3 relative to the reference plane 4. The difference of the obtained heights Hifor each single section of sheet material forms planchenoit plot sheet material 5.

Distinctive features of this method is the use of stereoscopic effect method, thereby increasing the reliability and accuracy of measurement plantamnesty sheet material, allowing to reduce the error introduced in the measurement of strong fluctuations and the thickness of the sheet material. The proposed method allows to obtain the absolute coordinates of the measured planches the sheet material, thereby increasing the quality of manufactured products.

Claims

The way of measuring plantamnesty sheet material, including the measurement of the width of the distribution of light projected on the surface of the sheet material, characterized in that the measured width of the distribution of light projection, obtained from 2 light sources that are offset relative to each other in a vertical direction and forming the light projection in the form of concentric rings placed one inside the other, with planchenoit sheet of material is defined as the difference between the heights of the individual sections of sheet material, as defined by the following expression:

Hi=L1-L0(X0i/X1i-1),

where L0- the distance (in mm) between the light sources;

L1- the distance (in mm) from the reference plane to the light source 2;

X0i- the width of the i-th projection of the beam (in pixels) on the surface of the sheet material from the light source 1;

X1i- the width of the i-th projection of the beam (in pixels) on the surface of the sheet material from the light source 2;

i - number of a single projection of the beam on the surface of the sheet material.

 

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3 cl, 2 dwg

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