A servo dynamic billet laser doppler measuring device

Abstract

The utility model discloses a kind of dynamic steel billet laser doppler measuring devices of follow-up, including conveying roller, the inner wall left side of conveying roller is equipped with measuring hole, the left side of conveying roller is fixedly installed with linear displacement rod, the upper movable mounting of linear displacement rod has moving platform, the upper fixed mounting of moving platform has laser doppler velocimeter sensor, first position sensor and second position sensor, the left side of linear displacement rod is fixedly installed with servo motor, the output end fixed mounting of servo motor has adjusting screw rod.The utility model actively adapts to the position change of steel billet, reduces the requirement to the running stability of steel billet, expands the applicable scenario of laser doppler velocimeter sensor, to realize the length measurement of continuous, stable, high-precision to the steel billet that exists swing or bending;It provides accurate length and positioning information for automatic sawing and subsequent process, help to improve product size qualification rate and yield rate.

Description

Technical Field

[0001] This utility model relates to the field of steel length measurement technology, specifically a follow-up dynamic steel billet laser Doppler measurement device. Background Technology

[0002] On steel production lines, such as rail beam plants, accurate measurement of the length of hot-rolled steel billets is crucial for subsequent sawing, process control, and cost accounting. Laser Doppler velocimeters (LDVs) are often used to measure the speed of steel online and integrate it to obtain the length due to their non-contact and high-precision characteristics. However, LDVs usually have an effective optical measurement range. In actual production, when hot-rolled steel billets are conveyed on roller conveyors, unavoidable lateral sway often occurs due to factors such as rolling process, roller conveyor condition, and the shape (curvature) of the steel billet itself.

[0003] In existing technologies, either contact measurement with low accuracy (speed measuring roller) is used, or other optical sensors with high sensitivity to the environment (moisture, oxide scale) are used, or manual assistance is relied upon. This dynamic instability will cause the measured surface to frequently move out of the optimal measurement area of ​​LDV, resulting in signal loss or instability, measurement point deviation and decreased accuracy. All of these make it difficult to achieve continuous, stable and high-precision automatic measurement of dynamic billets in the harsh rolling line environment. To this end, we propose a follow-up dynamic billet laser Doppler measurement device. Utility Model Content

[0004] The purpose of this invention is to provide a follow-up dynamic billet laser Doppler measurement device to solve the problems mentioned in the background art. In the prior art, the existing technology either uses contact measurement (speed measuring roller) with low accuracy, or other optical sensors that are highly sensitive to the environment (moisture, oxide scale), or relies on manual assistance. This dynamic instability will cause the measured surface to frequently move out of the optimal measurement area of ​​LDV, resulting in signal loss or instability, measurement point deviation and decreased accuracy. All of these make it difficult to achieve continuous, stable and high-precision automatic measurement of dynamic billets in the harsh rolling line environment.

[0005] To achieve the above objectives, this utility model provides the following technical solution, including:

[0006] The conveyor roller has a measuring hole on its inner left side. A linear displacement rod is fixedly installed on the left side of the conveyor roller. A moving platform is movably installed above the linear displacement rod. A laser Doppler velocimeter sensor, a first position sensor, and a second position sensor are fixedly installed above the moving platform. A servo motor is fixedly installed on the left side of the linear displacement rod. An adjusting screw is fixedly installed at the output end of the servo motor. Connecting bearings are installed at both ends of the adjusting screw. A control box is fixedly installed on the lower left side of the linear displacement rod. Limit grooves are formed on both sides of the linear displacement rod. Limit sliders are movably installed inside the limit grooves.

[0007] In a preferred embodiment of the following dynamic steel billet laser Doppler measuring device of this utility model, the limiting slider is fixedly connected to the moving platform, and the moving platform is movably connected to the linear displacement rod through the limiting slider and the limiting groove.

[0008] In a preferred embodiment of the following dynamic steel billet laser Doppler measuring device of this utility model, the adjusting screw passes through the interior of the moving platform, the adjusting screw is threadedly connected to the moving platform, the moving platform moves on the linear displacement rod through the servo motor and the adjusting screw, and the adjusting screw is movably connected to the linear displacement rod through the connecting bearing.

[0009] In a preferred embodiment of the following dynamic billet laser Doppler measuring device of this utility model, the control box is electrically connected to the servo motor, the control box is electrically connected to the first position sensor, the control box is electrically connected to the laser Doppler velocimeter sensor, the control box is electrically connected to the second position sensor, and a PLC controller is installed inside the control box.

[0010] As a preferred embodiment of the follow-up dynamic steel billet laser Doppler measuring device of this utility model, the conveyor roller conveyor is further provided with:

[0011] A top plate is fixedly installed above the conveyor rollers. A fan is bolted to the top of the top plate, and an installation cylinder is threaded onto the top of the fan. A filter plate is fixedly installed inside the installation cylinder. The filter plate is made of synthetic zeolite material.

[0012] In a preferred embodiment of the following dynamic steel billet laser Doppler measuring device of this utility model, the output end of the fan is connected to the interior of the conveying roller conveyor, and the input end of the fan is connected to the mounting cylinder.

[0013] As a preferred embodiment of the follow-up dynamic steel billet laser Doppler measuring device of this utility model, the linear displacement rod is further provided with:

[0014] A protective box is fixedly installed on the outside of the linear displacement rod. A cover plate is hinged to the top of the protective box, and a buckle is fixedly installed at the front end of the protective box. The protective box is fixedly connected to the conveyor roller. The protective box is detachably connected to the cover plate through the buckle.

[0015] Compared with the prior art, this utility model provides a follow-up dynamic steel billet laser Doppler measurement device, which has the following beneficial effects:

[0016] 1. This utility model uses a second position sensor to detect the specific position of the steel billet relative to the laser Doppler velocimeter sensor in real time, and a first position sensor to detect the specific position of the laser Doppler velocimeter sensor relative to the conveyor rollers in real time. In conjunction with a movable platform, it automatically adjusts the measurement position of the laser Doppler velocimeter sensor, ensuring it remains within the effective measurement range and aligned with the target measurement area. This proactively adapts to changes in the position of the steel billet, reducing the requirements for the stability of the steel billet's operation and expanding the applicable scenarios of the laser Doppler velocimeter sensor. This enables continuous, stable, and high-precision length measurement of steel billets that are swaying or bent; it provides accurate length and positioning information for subsequent processes such as automatic sawing, helping to improve product dimensional qualification rate and yield.

[0017] 2. This utility model uses a filter plate to absorb the water vapor in the gas entering the conveyor rollers and blows the water vapor-free gas into the interior of the conveyor rollers, thereby preventing water vapor or dust from entering the conveyor rollers and avoiding any impact on the measurements of the laser Doppler velocimeter sensor, the first position sensor, and the second position sensor. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the protective box of this utility model;

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of the linear displacement rod of this utility model;

[0021] Figure 4 This is a schematic diagram of the connection structure between the fan and the top plate of this utility model;

[0022] Figure 5 This is a schematic diagram of the connection structure between the linear displacement rod and the adjusting screw of this utility model;

[0023] Figure 6 This utility model Figure 5 Enlarged structural diagram at point A in the middle.

[0024] In the diagram: 1. Conveyor roller; 2. Fan; 3. Filter plate; 4. Mounting cylinder; 5. Top plate; 6. Cover plate; 7. Protective box; 8. Control box; 9. Servo motor; 10. Fastener; 11. Laser Doppler velocimeter sensor; 12. First position sensor; 13. Linear displacement rod; 14. Second position sensor; 15. Moving platform; 16. Limiting slider; 17. Limiting groove; 18. Measuring hole; 19. Adjusting screw; 20. Connecting bearing. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-6 A follow-up dynamic steel billet laser Doppler measuring device includes a conveyor roller 1, a measuring hole 18 on the left side of the inner wall of the conveyor roller 1, a linear displacement rod 13 fixedly installed on the left side of the conveyor roller 1, a moving platform 15 movably installed above the linear displacement rod 13, a laser Doppler velocimeter sensor 11, a first position sensor 12, and a second position sensor 14 fixedly installed above the moving platform 15, a servo motor 9 fixedly installed on the left side of the linear displacement rod 13, an adjusting screw 19 fixedly installed at the output end of the servo motor 9, connecting bearings 20 installed at both ends of the adjusting screw 19, a control box 8 fixedly installed below the left side of the linear displacement rod 13, limit grooves 17 opened on both sides of the linear displacement rod 13, and limit sliders 16 movably installed inside the limit grooves 17.

[0027] In this implementation scheme: the second position sensor 14 detects the specific position of the steel billet relative to the laser Doppler velocimeter sensor 11 in real time, and the first position sensor 12 detects the specific position of the laser Doppler velocimeter sensor 11 relative to the conveyor roller 1 in real time. In conjunction with the movable moving platform 15, the measurement position of the laser Doppler velocimeter sensor 11 is automatically adjusted to keep it within the effective measurement range and aligned with the target measurement area. This enables continuous, stable, and high-precision length measurement of steel billets that are swaying or bent. It provides accurate length and positioning information for subsequent processes such as automatic sawing, which helps to improve the product size qualification rate and yield.

[0028] Furthermore:

[0029] In an optional embodiment, the limiting slider 16 is fixedly connected to the moving platform 15, and the moving platform 15 is movably connected to the linear displacement rod 13 through the limiting slider 16 and the limiting groove 17.

[0030] In this implementation scheme, the above-mentioned technology ensures that the mobile platform 15 moves stably on the linear displacement rod 13.

[0031] Furthermore:

[0032] The adjusting screw 19 passes through the interior of the moving platform 15 and is threadedly connected to the moving platform 15. The moving platform 15 moves on the linear displacement rod 13 through the servo motor 9 and the adjusting screw 19. The adjusting screw 19 is movably connected to the linear displacement rod 13 through the connecting bearing 20.

[0033] In this implementation scheme: the servo motor 9 and the adjusting screw 19 provide a precise motion power source for the movement of the moving platform 15, and the connecting bearing 20 movably connects the other end of the adjusting screw 19 to the linear displacement rod 13, thereby ensuring the stability of the adjusting screw 19 when it rotates.

[0034] Furthermore:

[0035] In an optional embodiment, the control box 8 is electrically connected to the servo motor 9, the control box 8 is electrically connected to the first position sensor 12, the control box 8 is electrically connected to the laser Doppler velocimeter sensor 11, the control box 8 is electrically connected to the second position sensor 14, and a PLC controller is installed inside the control box 8.

[0036] In this implementation scheme: the control box 8 contains a servo driver that receives control signals from the PLC and controls the servo motor 9 to operate, so that the distance between the laser Doppler velocimeter sensor 11 and the billet is kept within a limited measurement range. At the same time, the PLC controller inside the control box 8 calculates and analyzes the data from the first position sensor 12, the laser Doppler velocimeter sensor 11 and the second position sensor 14.

[0037] Furthermore:

[0038] In an optional embodiment, the conveyor roller 1 is further provided with:

[0039] The top plate 5 is fixedly installed above the conveyor roller 1. A fan 2 is bolted on the top plate 5. An installation cylinder 4 is threaded on the top of the fan 2. A filter plate 3 is fixedly installed inside the installation cylinder 4. The filter plate 3 is made of artificially synthesized zeolite material.

[0040] In this implementation scheme: the filter plate 3 absorbs the water vapor in the gas entering the conveyor roller 1 and blows the water vapor-free gas into the interior of the conveyor roller 1, and then blows it out from the various open openings inside the conveyor roller 1, thereby preventing water vapor or dust from entering the conveyor roller 1 and avoiding any impact on the measurement of the laser Doppler velocimeter sensor 11, the first position sensor 12 and the second position sensor 14 when the measuring device is working. At the same time, the artificially synthesized zeolite has a very strong moisture absorption capacity and can preferentially adsorb water molecules, thus greatly improving the filtration effect of the filter plate 3.

[0041] Furthermore:

[0042] In an optional embodiment, the output end of the fan 2 is connected to the interior of the conveyor roller 1, and the input end of the fan 2 is connected to the mounting cylinder 4.

[0043] In this implementation scheme, the filtered gas is blown into the interior of the conveyor roller 1 using the above-mentioned technology.

[0044] Furthermore:

[0045] In an optional embodiment, the linear displacement rod 13 is further provided with:

[0046] The protective box 7 is fixedly installed on the outside of the linear displacement rod 13. A cover plate 6 is hinged to the top of the protective box 7. A buckle 10 is fixedly installed at the front end of the protective box 7. The protective box 7 is fixedly connected to the conveyor roller 1. The protective box 7 is detachably connected to the cover plate 6 through the buckle 10.

[0047] In this implementation plan, the installation of the protective box 7 protects the laser Doppler velocimeter sensor 11, the first position sensor 12, and the second position sensor 14 from collision damage.

[0048] Working Principle: When using this follow-up dynamic billet laser Doppler measuring device, the billet first runs on the conveyor roller 1. The second position sensor 14 monitors its lateral position information in real time through the measuring hole 18 and feeds it back to the primary PLC in the control box 8. The primary PLC calculates and analyzes this position information to determine whether the billet deviates from the preset optimal measurement path of the laser Doppler velocimeter sensor 11. If a deviation exists, the primary PLC sends a compensation displacement operation command to the servo motor 9 controlled by the control box 8. Then, the servo motor 9 drives the adjusting screw 19 to rotate, causing the moving platform 15 and the laser Doppler velocimeter sensor 11 on the platform to move precisely laterally on the linear displacement rod 13 until the laser Doppler velocimeter sensor 11 is re-aligned with the target measurement area of ​​the billet. This closed-loop control process is performed in real time and continuously, ensuring that the laser Doppler velocimeter sensor 11 dynamically follows the swing of the billet and always performs effective measurement. The length data measured by the laser Doppler velocimeter sensor 11 is fed back to the primary system through the wiring inside the control box 8 for subsequent process processing. When the position signal fed back by the first position sensor 12 is smaller than the preset protection position signal, the device protection action is triggered, and the laser Doppler velocimeter sensor 11 will be moved to a fixed position. Then, the electrician opens the latch 10 and lifts the cover 6 to facilitate timely inspection and maintenance. Secondly, during the operation of the measuring device, the control box 8 controls the fan 2 to blow air into the conveyor roller 1. When the gas passes through the filter plate 3, the filter plate 3 absorbs the moisture in the gas. The filtered gas enters the interior of the conveyor roller 1, blowing out the moisture and dust inside the conveyor roller 1, preventing moisture and dust from entering the conveyor. Inside the conveyor roller 1, the protective box 7 further protects the laser Doppler velocimeter sensor 11, the first position sensor 12, and the second position sensor 14 from collision damage. Finally, the mounting cylinder 4 can be unscrewed from the fan 2, and the filter plate 3 inside the mounting cylinder 4 can be replaced. The laser Doppler velocimeter sensor 11 (model: MSE-V1000), the first position sensor 12 (model: 917-727), and the second position sensor 14 are all existing technologies and will not be described in detail here. This is the working principle of the follow-up dynamic billet laser Doppler measuring device.

[0049] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A servo-type dynamic steel billet laser Doppler measuring device, characterized in that, include: A conveyor roller (1) has a measuring hole (18) on the left side of its inner wall. A linear displacement rod (13) is fixedly installed on the left side of the conveyor roller (1). A moving platform (15) is movably installed above the linear displacement rod (13). A laser Doppler velocimeter sensor (11), a first position sensor (12), and a second position sensor (14) are fixedly installed above the moving platform (15). A servo motor (9) is fixedly installed on the left side of the linear displacement rod (13). An adjusting screw (19) is fixedly installed at the output end of the servo motor (9). Connecting bearings (20) are installed at both ends of the adjusting screw (19). A control box (8) is fixedly installed below the left side of the linear displacement rod (13). Limiting grooves (17) are opened on both sides of the linear displacement rod (13). A limiting slider (16) is movably installed inside the limiting grooves (17).

2. The follow-up dynamic steel billet laser Doppler measuring device according to claim 1, characterized in that, The limiting slider (16) is fixedly connected to the moving platform (15), and the moving platform (15) is movably connected to the linear displacement rod (13) through the limiting slider (16) and the limiting groove (17).

3. The follow-up dynamic steel billet laser Doppler measuring device according to claim 1, characterized in that, The adjusting screw (19) passes through the interior of the moving platform (15). The adjusting screw (19) is threadedly connected to the moving platform (15). The moving platform (15) moves on the linear displacement rod (13) through the servo motor (9) and the adjusting screw (19). The adjusting screw (19) is movably connected to the linear displacement rod (13) through the connecting bearing (20).

4. The follow-up dynamic steel billet laser Doppler measuring device according to claim 1, characterized in that, The control box (8) is electrically connected to the servo motor (9), the control box (8) is electrically connected to the first position sensor (12), the control box (8) is electrically connected to the laser Doppler velocimeter sensor (11), the control box (8) is electrically connected to the second position sensor (14), and a PLC controller is installed inside the control box (8).

5. The follow-up dynamic steel billet laser Doppler measuring device according to claim 1, characterized in that, The conveyor roller conveyor (1) is also provided with: A top plate (5) is fixedly installed above the conveyor roller (1). A fan (2) is bolted on the top plate (5). An installation cylinder (4) is threaded on the top of the fan (2). A filter plate (3) is fixedly installed inside the installation cylinder (4). The filter plate (3) is made of synthetic zeolite material.

6. The follow-up dynamic steel billet laser Doppler measuring device according to claim 5, characterized in that, The output end of the fan (2) is connected to the interior of the conveying roller (1), and the input end of the fan (2) is connected to the mounting cylinder (4).

7. The follow-up dynamic steel billet laser Doppler measuring device according to claim 1, characterized in that, The linear displacement rod (13) is also provided with: A protective box (7) is fixedly installed on the outside of the linear displacement rod (13). A cover plate (6) is hinged on the top of the protective box (7). A buckle (10) is fixedly installed at the front end of the protective box (7). The protective box (7) is fixedly connected to the conveyor roller (1). The protective box (7) is detachably connected to the cover plate (6) through the buckle (10).

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