A multi-station device and method for online width measurement and calibration of strip steel

Abstract

This invention discloses a multi-station device and method for online strip width measurement and calibration, comprising a rotating device, a first laser measurement calibration plate, a second laser measurement calibration plate, and a third laser measurement calibration plate. The rotating device includes a base, fixed plates respectively mounted on two support rods of the base, a crossbeam rotatably mounted between the two fixed plates, and a motor driving the crossbeam to rotate. The first, second, and third laser measurement calibration plates are all fixed on the crossbeam along the circumferential direction, and the first and second laser measurement calibration plates are arranged perpendicularly to each other, and the second and third laser measurement calibration plates are arranged at 180°. This invention solves the technical defects of offline strip width measurement and single calibration plate in the prior art, and realizes accurate laser width measurement and calibration of strips with different width requirements, as well as online width measurement.

Description

Technical Field

[0001] This invention belongs to the field of strip steel measurement technology, specifically relating to a multi-station device and method for online strip steel width measurement and calibration. Background Technology

[0002] Strip steel is one of the key steel plate products produced by steel rolling mills. It is characterized by its length, narrowness, and resistance to rust, and its production aims to meet the needs of various industrial sectors for metal and machinery products. Measuring the width of strip steel is crucial in its manufacturing process. Real-time measurement of strip steel width on the production line is of paramount importance for optimizing production processes and ensuring product quality. In the manufacturing process of plate materials, maintaining a relatively constant dimensional tolerance in strip width can significantly improve the product qualification rate and reduce unnecessary raw material losses. Studies show that every 1mm reduction in width deviation can increase the yield rate by 0.1%. As a vital parameter in the rolling mill control model, accurate and real-time online measurement of strip steel width is essential for better control of mill operation, improved productivity, and enhanced competitiveness of the enterprise.

[0003] To date, methods for measuring strip width have continuously evolved, from manual sampling to offline and online inspection. The earliest manual sampling involved operators using micrometer calipers for contact measurement. This method was time-consuming, inaccurate, and unable to provide real-time monitoring. Furthermore, the harsh working environment posed a safety risk to inspectors, leading to fatigue and affecting inspection quality. Additionally, manual inspection could only be performed after the strip had cooled, failing to detect hot steel plates and thus negating the effectiveness of real-time monitoring. With the increasing application of advanced technologies in engineering practice, CCD technology has enabled non-contact dynamic width measurement of steel plates. The measurement results are directly displayed on a screen, allowing for more intuitive and convenient observation of strip width and significantly reducing worker fatigue. These non-contact measurements can be categorized into two methods: offline and online. Laser width measurement utilizes the principle of symmetrical triangular reflection, and its main component is also a CCD, improving stability and accuracy. The accuracy of the width measuring instrument is ensured through calibration using a standard plate. However, for the calibration of online continuous strip width measuring instruments, since the calibration plate of the laser width measuring instrument is located below the strip, the strip conveyor line must be stopped before measuring the strip width. The measurement data must then be accurately calibrated using the calibration plate and compared with the actual measurement. This method cannot achieve online calibration of strip width and is therefore an offline measurement method. Online measurement methods, in contrast to offline methods, primarily address the problem of real-time online measurement of strip width. Furthermore, most online strip width measuring devices are equipped with only a single calibration plate, which is not suitable for measuring strips of different widths and makes accurate calibration difficult.

[0004] The current issues regarding strip width measurement are as follows:

[0005] 1) The strip width measurement calibration plate on the production line is located below the strip. The conveyor line must be stopped during laser calibration. If a certain type of strip is too wide and obstructs the calibration plate, the strip must be cut before laser width measurement calibration can be performed.

[0006] 2) Since a single calibration plate is currently used on the production line, when measuring the width of strip steel with different width requirements, the production line personnel need to stop the line to replace the calibration plate, which affects the efficiency of the production line.

[0007] 3) Due to line stoppage for calibration and replacement of calibration plates, online measurement of strip width cannot be achieved on the production line. This not only affects the product qualification rate, but also increases unnecessary waste of raw materials. Summary of the Invention

[0008] The present invention aims to overcome the above-mentioned technical problems by providing a multi-station device and method for online strip width measurement and calibration. It solves the technical defects of offline strip width measurement and single calibration plate in the prior art, and realizes accurate laser width measurement and calibration of strips with different width requirements, as well as online width measurement.

[0009] To achieve the above objectives, the present invention provides a multi-station device for online strip width measurement and calibration, comprising a rotating device, a first laser measurement calibration plate, a second laser measurement calibration plate, and a third laser measurement calibration plate; the rotating device includes a base, fixed plates respectively mounted on two support rods of the base, a crossbeam rotatably mounted between the two fixed plates, and a motor for driving the crossbeam to rotate; the first laser measurement calibration plate, the second laser measurement calibration plate, and the third laser measurement calibration plate are all fixed on the crossbeam along the circumferential direction, and the first laser measurement calibration plate and the second laser measurement calibration plate, the second laser measurement calibration plate and the third laser measurement calibration plate are all arranged perpendicularly, and the first laser measurement calibration plate and the third laser measurement calibration plate are arranged at 180°.

[0010] Furthermore, the short shaft at one end of the crossbeam is inserted into the shaft hole of one side of the fixing plate, and the short shaft at the other end of the crossbeam is inserted into the shaft hole of the other side of the fixing plate. The crossbeam, the short shaft, and the shaft hole are coaxial, and the shaft hole is located at the center of gravity of the fixing plate.

[0011] Furthermore, the motor is mounted on the support rod and drives the short shaft to rotate.

[0012] A method for online strip width measurement and calibration is also provided, which uses the above-mentioned multi-station device for online strip width measurement and calibration. The working process is as follows:

[0013] 1) Predict the strip width and match a suitable laser width measurement calibration plate based on the predicted strip width data; start the motor to drive the short shaft to rotate and rotate the matched laser width measurement calibration plate to the downward vertical direction;

[0014] 2) After switching to the laser width measurement calibration board, the laser shines into the measurement slot of the laser width measurement calibration board to complete the laser width measurement calibration;

[0015] 3) After completing the laser width measurement calibration, start the motor to drive the short shaft to rotate, rotate all the laser width measurement calibration plates until they are horizontal or vertically upward, so that there are no laser width measurement calibration plates under the crossbeam, that is, directly opposite the strip steel.

[0016] 4) The laser irradiates both sides of the strip to complete the online laser width measurement and obtain the strip width data; it is determined whether the strip width data meets the preset error range. If not, an alarm is triggered. If the strip width data is within the error range, the strip width data is saved.

[0017] Compared with the prior art, the advantages of the present invention are as follows: The multi-station device and method for online strip width measurement and calibration of the present invention solves the technical defects of offline strip width measurement and single calibration plate in the prior art, and realizes accurate laser width measurement and calibration of strips with different width requirements, as well as online width measurement. Attached Figure Description

[0018] Figure 1 This is a simplified structural diagram of the multi-station device for online strip width measurement and calibration of the present invention. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0020] like Figure 1 The multi-station device for online strip width measurement and calibration shown includes a rotating device, a first laser measurement calibration plate 3, a second laser measurement calibration plate 5, and a third laser measurement calibration plate 6. The rotating device includes a base 8, a fixed plate 4 respectively mounted on two support rods 1 on the base 8, and a crossbeam 2. The short shaft at one end of the crossbeam 2 is inserted into the shaft hole of one side of the fixed plate 4, and the short shaft at the other end of the crossbeam 2 is inserted into the shaft hole of the other side of the fixed plate 4. The crossbeam 2, the short shaft, and the shaft hole are coaxial, and the shaft hole is located at the center of gravity of the fixed plate 4. At the same time, a motor 9 for driving the short shaft to rotate is installed on one side of the support rod 1.

[0021] The first laser measurement calibration plate 3, the second laser measurement calibration plate 5, and the third laser measurement calibration plate 6 are all fixed to the crossbeam along the circumferential direction. The first laser measurement calibration plate 3 is perpendicular to the second laser measurement calibration plate 5, and the second laser measurement calibration plate 5 is perpendicular to the third laser measurement calibration plate 6. The first laser measurement calibration plate 3 and the third laser measurement calibration plate 6 are arranged at 180°. These three laser measurement calibration plates are three different models, enabling online detection and calibration of different strip widths.

[0022] The working process of the multi-station device for online strip width measurement and calibration is as follows:

[0023] 1) Predict the width of strip 7, and match a suitable laser width measurement calibration plate, such as the first laser width measurement calibration plate, based on the predicted strip width data; start the motor to drive the short shaft to rotate, and rotate the matched laser width measurement calibration plate to the downward vertical direction, that is, to be arranged perpendicular to the strip.

[0024] 2) After switching the laser width measurement calibration board, control the laser to move and shoot into the measurement slot of the laser width measurement calibration board to complete the laser width measurement calibration;

[0025] 3) After completing the laser width measurement calibration, start the motor to drive the short shaft to rotate, rotate all the laser width measurement calibration plates until they are horizontal or vertically upward, so that there are no laser width measurement calibration plates under the crossbeam, that is, directly opposite the strip steel, to avoid the laser width measurement calibration plates blocking the laser from shining on the strip steel 7, thus realizing online width measurement of the strip steel 7.

[0026] 4) Control the laser to move and project onto both sides of the strip to complete the online laser width measurement and obtain the strip width data; determine whether the strip width data meets the preset error range. If not, an alarm is triggered. If the strip width data is within the error range, the strip width data is displayed and stored; then continue calibration and testing.

Claims

1. A multi-station device for online strip width measurement and calibration, characterized in that: The system includes a rotating device, a first laser measurement calibration plate (3), a second laser measurement calibration plate (5), and a third laser measurement calibration plate (6). The rotating device includes a base (8), a fixed plate (4) respectively installed on two support rods (1) of the base (8), a crossbeam (2) rotatably installed between the two fixed plates (4), and a motor (9) that drives the crossbeam (2) to rotate. The first laser measurement calibration plate (3), the second laser measurement calibration plate (5), and the third laser measurement calibration plate (6) are all fixed on the crossbeam along the circumferential direction. The first laser measurement calibration plate (3) is perpendicular to the second laser measurement calibration plate (5), and the second laser measurement calibration plate (5) is perpendicular to the third laser measurement calibration plate (6). The first laser measurement calibration plate (3) and the third laser measurement calibration plate (6) are arranged at 180°. The work process is as follows: 1) Predict the width of the strip (7), and match a suitable laser width measurement calibration plate according to the predicted strip width data; start the motor to drive the short shaft to rotate, and rotate the matched laser width measurement calibration plate to the downward vertical direction; 2) After switching to the laser width measurement calibration board, the laser shines into the measurement slot of the laser width measurement calibration board to complete the laser width measurement calibration; 3) After completing the laser width measurement calibration, start the motor to drive the short shaft to rotate, rotate all the laser width measurement calibration plates until they are horizontal or vertically upward, so that there are no laser width measurement calibration plates under the crossbeam, that is, directly opposite the strip steel. 4) The laser irradiates both sides of the strip to complete the online laser width measurement and obtain the strip width data; it is determined whether the strip width data meets the preset error range. If not, an alarm is triggered. If the strip width data is within the error range, the strip width data is saved.

2. The multi-station device for online strip width measurement and calibration according to claim 1, characterized in that: The short shaft at one end of the crossbeam (2) is inserted into the shaft hole of the fixing plate (4) on one side, and the short shaft at the other end of the crossbeam (2) is inserted into the shaft hole of the fixing plate (4) on the other side. The crossbeam (2), the short shaft and the shaft hole are coaxial, and the shaft hole is located at the center of gravity of the fixing plate (4).

3. The multi-station device for online strip width measurement and calibration according to claim 2, characterized in that: The motor (9) is mounted on the support rod (1) and drives the short shaft to rotate.

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