System for measuring length of steel billet on line, correction method thereof and electronic equipment

Abstract

The invention provides an on-line billet length measurement system, a correction method thereof and electronic equipment, relates to the technical field of automatic control, is used for a hot rolling production line, and comprises a laser range finder used for emitting laser to the rear end of a billet in the running direction at a certain incident angle; the first sensor is used for detecting whether the front end of the steel billet in the running direction reaches a first specified position or not; the processing device is used for acquiring a first distance fed back by the laser range finder based on the currently emitted laser under the condition that the first sensor detects that the front end of the steel billet in the running direction reaches a first specified position; and determining the length of the steel billet in the running direction based on the first distance, the second distance and the incident angle according to the second distance between the transmitting point of the laser range finder and the plane where the front end of the steel billet in the running direction is located in the running direction. The technical problem of inaccurate length measurement caused by poor working environment of a hot rolling production line in the prior art can be solved.

Description

Technical Field

[0001] The present application relates to the field of automatic control technology, and in particular to an online billet length measurement system and a correction method thereof, an electronic device, and a storage medium. Background Art

[0002] The measurement of the length of the steel billet in the hot rolling furnace will directly affect the calculation of the mill roll gap model. Therefore, the accuracy of the steel billet length measurement will directly affect the accuracy of the mill rolling procedure and the rolling quality. At present, the steel billet generally uses a combination of roller encoders and gratings to complete the length measurement. However, due to factors such as the flatness of the steel billet surface, the degree of roller wear, the roller diameter, and the roller spacing, the steel billet will slip during transportation, resulting in inaccurate length measurement. The problem of length measurement deviation directly affects the calculation of the model, which in turn brings about product quality problems. Summary of the invention

[0003] The embodiment of the present application provides an online billet length measurement system and its correction method, electronic device, and storage medium. By constructing a geometric relationship to measure the billet length, it can solve the technical problem of inaccurate length measurement caused by the poor working environment of the hot rolling production line in the related technology.

[0004] In a first aspect, an embodiment of the present application provides an online billet length measurement system for a hot rolling production line, wherein the hot rolling production line is used to roll billets, wherein the hot rolling production line includes a roller table, and wherein the roller table is used to transport the billets. The system includes:

[0005] A laser rangefinder, used for emitting laser light at a certain incident angle to the rear end of the billet in the running direction, and the laser light emitted by the laser rangefinder is parallel to the plane where the roller is located;

[0006] A first sensor, used for detecting whether the front end of the steel billet in the running direction reaches a first designated position;

[0007] A processing device, the processing device is communicatively connected to the laser rangefinder and the first sensor respectively, and is used for obtaining, when the first sensor detects that the front end of the steel billet in the running direction reaches the first designated position, a first distance fed back by the laser rangefinder based on the currently emitted laser, and a second distance in the running direction between the emission point of the laser rangefinder and the plane where the front end of the steel billet in the running direction is located, and determining the length of the steel billet in the running direction based on the first distance, the second distance and the incident angle.

[0008] In some embodiments, the above-mentioned online billet length measurement system further includes:

[0009] a second sensor, the second sensor being communicatively connected to the processing device;

[0010] The second sensor is used to detect whether the front end of the steel billet in the running direction reaches a second designated position, and the second designated position is reached before the first designated position;

[0011] The processing device is further configured to control the roller to decelerate the steel billet and run it to the first designated position when the second sensor detects that the front end of the steel billet in the running direction reaches the second designated position.

[0012] In some embodiments, the above-mentioned online billet length measurement system further includes:

[0013] a third sensor, the third sensor being communicatively connected to the processing device;

[0014] The third sensor is used to detect whether the front end of the steel billet in the running direction reaches a third designated position, and the third designated position is between the first designated position and the second designated position;

[0015] A correction device, the correction device is communicatively connected with the processing device;

[0016] The processing device is also used to control the roller to stop the steel billet and control the pushing device to adjust the posture of the steel billet when the third sensor detects that the front end of the steel billet in the running direction reaches the third designated position.

[0017] In some embodiments, the first sensor includes a hot and cold detector; and / or, the second sensor includes a hot and cold detector; and / or, the third sensor includes a hot and cold detector.

[0018] In some embodiments, the correction device comprises:

[0019] A hydraulic pusher, the hydraulic pusher is in communication with the processing device, and the hydraulic pusher is used to adjust the posture of the steel billet based on the instruction of the processing device;

[0020] A pressure switch is communicatively connected with the processing device, the pressure switch is used to detect a pressure signal, and the processing device is also used to control the hydraulic pusher to return to the center position based on the pressure signal, and the pressure signal is used to indicate the contact between the hydraulic pusher and the billet.

[0021] In some embodiments, the processing device comprises:

[0022] A programmable logic processor, wherein the programmable logic processor is communicatively connected with the laser rangefinder and the first sensor respectively;

[0023] switches, the switches being communicatively connected to the programmable logic processors respectively;

[0024] An industrial computer, the industrial computer being communicatively connected with the switch;

[0025] The programmable logic processor is used to collect data from the laser rangefinder and the first sensor, and send the data to the industrial computer through the switch, and the industrial computer is used to determine the length of the billet in the running direction based on the data.

[0026] Compared with the related art that relies on devices such as roller encoders and gratings that are easily affected by working environment factors, the online billet length measurement system proposed in the embodiment of the present application cooperates with a laser rangefinder that is not easily affected by the unavoidable factors of the production line working environment to establish a geometric relationship to determine the length of the billet. The system proposed in the embodiment of the present application can accurately measure the length of the billet, thereby improving the accuracy of subsequent calculation models and enhancing product quality.

[0027] In a second aspect, an embodiment of the present application provides a calibration method for a system as described in any one of the first aspects, the calibration method comprising:

[0028] The longest standard billet and the shortest standard billet are respectively transported through the roller conveyor so that the front ends of the longest standard billet and the shortest standard billet in the running direction both reach the first designated position, wherein the length of the billet in the running direction is between the lengths of the longest standard billet and the shortest standard billet in the running direction, and the cross section of the billet in the running direction is the same as the cross sections of the longest standard billet and the shortest standard billet in the running direction;

[0029] The incident angle of the laser rangefinder is adjusted so that at the incident angle, the laser emitted by the laser rangefinder falls on the rear ends of the longest standard billet and the shortest standard billet in the running direction.

[0030] In some embodiments, the step of transporting the longest standard billet and the shortest standard billet through the roller respectively comprises:

[0031] First, the longest standard billet is transported through the roller conveyor so that the front end of the longest standard billet in the running direction reaches the first designated position;

[0032] Then the shortest standard billet is transported through the roller conveyor so that the front end of the shortest standard billet in the running direction reaches the first designated position;

[0033] The step of adjusting the incident angle of the laser rangefinder comprises:

[0034] When the front end of the longest standard billet in the running direction reaches the first designated position, adjusting the laser distance measurement so that the laser emitted by the laser distance meter falls on the rear end of the longest standard billet in the running direction at a minimum incident angle;

[0035] When the front end of the shortest standard billet in the running direction reaches the first designated position, it is verified whether the laser emitted by the laser rangefinder falls on the rear end of the shortest standard billet in the running direction.

[0036] The correction method proposed in the embodiment of the present application uses the longest standard billet and the shortest standard billet as the upper and lower limits of the measurement to find a suitable incident angle of the laser rangefinder, thereby ensuring that billets with a length between the longest standard billet and the shortest standard billet can be measured at this incident angle, thereby improving the adaptability of the above-mentioned online billet length measurement system and reducing the amount of operations in actual use.

[0037] In a third aspect, an embodiment of the present application provides an electronic device, including:

[0038] Memory for storing computer programs;

[0039] A processor is used to execute the computer program to implement the steps of any one of the methods in the second aspect.

[0040] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program runs on a computer or a processor, the computer or the processor executes the steps of any one of the methods described in the second aspect.

[0041] The technical effects obtained by the third and fourth aspects mentioned above are similar to the technical effects obtained by the corresponding technical means in the second aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0043] Figure 1 A schematic diagram of an application of an online billet length measurement system provided in an embodiment of the present application;

[0044] Figure 2A schematic diagram of another application of an online billet length measurement system provided in an embodiment of the present application;

[0045] Figure 3 A schematic diagram of the structure of an online billet length measurement system provided in an embodiment of the present application;

[0046] Figure 4 A schematic diagram of a flow chart of a calibration method provided in an embodiment of the present application;

[0047] Figure 5 A schematic diagram of an application of a correction method provided in an embodiment of the present application;

[0048] Figure 6 A schematic diagram of an application for determining the incident angle of a laser rangefinder provided in an embodiment of the present application;

[0049] Figure 7 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0050] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0051] It should be understood that the "multiple" mentioned herein refers to two or more. In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in order to facilitate the clear description of the technical solution of the embodiments of the present application, in the embodiments of the present application, the words "first", "second" and the like are used to distinguish between the same items or similar items with basically the same functions and effects. Those skilled in the art can understand that the words "first", "second" and the like do not limit the quantity and execution order, and the words "first", "second" and the like do not limit them to be necessarily different.

[0052] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, product, or apparatus.

[0053] For a long time, the steel billets on the hot rolling production line have generally adopted a combination of roller encoders and gratings to complete the length measurement. However, due to the long-term operation of the roller and the long-term contact with the high-temperature steel billets, there will be a certain degree of wear, and the factors that cannot be completely avoided, such as the flatness of the steel billets, the diameter and spacing of the rollers, will cause the steel billets to slip during transportation, thereby causing distortion of the encoder and grating measurement, and then affecting the subsequent calculation model and product quality. Therefore, it is necessary to propose a method to overcome the technical problem of inaccurate steel billet length measurement due to factors that cannot be completely avoided during the production process of the hot rolling production line. In view of this, the present application proposes an online steel billet length measurement system to at least solve the above technical problems.

[0054] Figure 1 The following is a schematic diagram of an application of an online billet length measurement system provided in an embodiment of the present application. Figure 1 As shown, the system includes: a laser rangefinder, a first sensor and a processing device (not shown in the figure). Figure 1 This is a top view of the hot rolling production line, where the billet is transported by the roller along the running direction from left to right, where the front end in the running direction is side A and the rear end in the running direction is side B. During the transportation process, the length of the billet along the running direction is determined by the cooperation of the laser rangefinder, the first sensor and the processing device.

[0055] For example, Figure 1 As shown, the laser emitted by the laser rangefinder can hit the B surface of the steel billet at a certain incident angle, and the emitted laser is parallel to the plane where the roller is running. The first sensor is arranged behind the laser rangefinder in the running direction to detect whether the A surface of the steel billet reaches the first designated position.

[0056] It should be noted that the incident angle proposed in the embodiment of the present application refers to the angle between the incident light and the normal of the incident surface. The first sensor mentioned above can be a sensor that can measure position, such as a distance sensor, and the first designated position can be set according to the position of the laser rangefinder, the length of the billet, the sensitivity of the sensor and other on-site factors to ensure that, when reaching the position, the laser will fall on the B surface of the billet.

[0057] The processing device is connected to the laser rangefinder and the first sensor for communication and can read the data of the two. When the surface A of the billet reaches the first designated position, the processing device obtains the distance L1 currently fed back by the laser rangefinder according to the emitted laser, the distance L2 between the emission point of the laser rangefinder and the plane where the surface A of the billet is located in the running direction, and the current incident angle θ. Figure 1 As shown, the incident angle θ can be determined based on the rotation angle of the laser distance meter in the roller plane.

[0058] After obtaining L1, L2 and θ, the processing device can determine the length of the billet through the geometric relationship between the three, as shown below: The length of the billet = L2-L1 cosθ. Figure 1 As shown, L3 = L1 cosθ.

[0059] Compared with the related art that relies on devices such as roller encoders and gratings that are easily affected by working environment factors, the online billet length measurement system proposed in the embodiment of the present application cooperates with a laser rangefinder that is not easily affected by the unavoidable factors of the production line working environment to establish a geometric relationship to determine the length of the billet. The system proposed in the embodiment of the present application can accurately measure the length of the billet, thereby improving the accuracy of subsequent calculation models and enhancing product quality.

[0060] In some examples, Figure 2 The schematic diagram of another application of the system for measuring the length of a steel billet online provided in the embodiment of the present application is as follows: Figure 2 As shown, the above-mentioned system for measuring the length of a steel billet online further includes a second sensor.

[0061] Exemplarily, the second sensor is connected to the processing device for communication, and the second sensor can detect whether the A surface of the steel billet reaches the second designated position, and the second designated position follows the running direction of the roller, and the steel billet reaches the second designated position before the first designated position. When the A surface of the steel billet reaches the second designated position, the processing device controls the speed of the roller to slow down the steel billet and gradually approach the first designated position, so as to determine the length of the steel billet at the first designated position according to the aforementioned processing method. By controlling the steel billet to reach the first designated position in a decelerating manner, it is possible to prevent inaccurate measurements due to the roller speed being too fast.

[0062] In some examples, such as Figure 2 As shown, based on the above-mentioned second sensor, the above-mentioned system for measuring the length of the steel billet online also includes a third sensor and a pushing device, and the third sensor and the pushing device are both communicatively connected with the above-mentioned processing device.

[0063] Exemplarily, the third sensor is used to detect whether the A surface of the steel billet reaches the third designated position, and the third designated position is between the second designated position and the first designated position. The pushing device is used to adjust the posture of the steel billet to prevent the steel billet from being placed incorrectly during transportation, resulting in inaccurate length measurement.

[0064] When the third sensor detects that the A side of the billet has reached the third designated position, the processing device controls the roller to stop the billet and controls the pushing device to adjust the billet's posture. In this way, when the billet is very close to the first designated position, the billet placement position is adjusted to improve the measurement accuracy. Afterwards, after adjustment, the A side of the billet can be slowly transported to the first designated position.

[0065] It should be noted that the pushing device can be placed between 0.8m and 1m in front of the first designated position to leave a certain adjustment space for adjusting the position and posture of the steel billet.

[0066] In some examples, the first sensor, the second sensor, and the third sensor may be cold and hot detectors.

[0067] It should be noted that the hot and cold detector is a sensor used to detect the position of an object. It uses a modulated red visible laser beam for measurement. When the emitted laser beam is blocked by the workpiece, a control signal is generated. Since the hot and cold detector is suitable for harsh working scenes, it is particularly suitable for production line environments such as metallurgy.

[0068] Exemplarily, when the first sensor, the second sensor and the third sensor adopt hot and cold detectors, since the detection is performed by means of a laser beam, the positions of the first sensor, the second sensor and the third sensor should be in the same straight line with the first designated position, the second designated position and the third designated position.

[0069] It can be understood that when actually installing the second cold and heat detector (i.e., the second sensor) and the third cold and heat detector (i.e., the third sensor), the position of the third cold and heat detector can be determined first. Usually, the distance between the third cold and heat detector and the pushing device in the above-mentioned running direction is 40 cm, and the position difference between the second cold and heat detector and the third cold and heat detector is 50 cm.

[0070] In some examples, such as Figure 2 As shown, the above-mentioned straightening device includes: a hydraulic straightening device and a pressure switch. The hydraulic straightening device is connected to the processing device for communication, and the pressure switch is connected to the processing device for communication.

[0071] For example, the hydraulic pusher is usually composed of a pusher head that can move in a piston manner and a hydraulic power cylinder. The pressure switch is a pressure sensor that can detect the pressure of the pusher head. When the pusher head contacts the billet to adjust the billet's posture, the pressure switch will generate a pressure signal based on the contact force between the two, and send the pressure signal to the processing device. The processing device controls the retraction of the pusher head based on the pressure signal to prevent the extended pusher head from affecting the transportation of the billet.

[0072] In some examples, Figure 3 A schematic diagram of the structure of an online billet length measurement system provided in an embodiment of the present application is shown in FIG. Figure 3 As shown, the above-mentioned processing device includes: a PLC (Programmable Logic Controller), a switch and an industrial computer, and the PLC is connected to the industrial computer through the switch.

[0073] Exemplarily, the PLC can be connected to the first sensor, the second sensor, the third sensor, the laser rangefinder and the correction device. Since the PLC is a large industrial control device, it can adapt to the environment of the hot rolling production line and can be compatible with various signals of various sensors and instruments. Therefore, various equipment signals can be safely and stably transmitted to the industrial computer through the switch for on-site calculation.

[0074] In actual production, steel billets vary in length and their cross-sections are often not very different, but the installation positions of sensors and laser rangefinders usually do not move. Therefore, it is necessary to ensure that regardless of the length of the steel billet, the incident angle of the laser rangefinder can hit the rear end of the steel billet in the running direction (i.e., the B side of the above-mentioned steel billet). Therefore, the embodiment of the present application also proposes a correction method for the above-mentioned online steel billet length measurement system to solve this technical problem. Figure 4 A flow chart of a calibration method provided in an embodiment of the present application is shown in FIG. Figure 4 As shown, the above correction method includes:

[0075] S110. Transport the longest standard billet and the shortest standard billet respectively through rollers so that the front ends of the longest standard billet and the shortest standard billet in the running direction both reach the first designated position, wherein the length of the billet in the running direction is between the lengths of the longest standard billet and the shortest standard billet in the running direction, and the cross-section of the billet in the running direction is the same as the cross-section of the longest standard billet and the shortest standard billet in the running direction.

[0076] It should be noted that the longest standard billet and the shortest standard billet represent the longest and shortest billets produced by the current hot rolling production line, and the cross-section of the produced billets in the running direction is the same as that of the standard billets (i.e. the cross-section cut perpendicular to the running direction).

[0077] S120, adjusting the incident angle of the laser rangefinder so that at the incident angle, the laser emitted by the laser rangefinder falls on the rear ends of the longest standard billet and the shortest standard billet in the running direction.

[0078] For example, Figure 5 A schematic diagram of an application of a correction method provided in an embodiment of the present application is shown in FIG. Figure 5 (a) and (b) show the calibration method using the longest standard billet and the shortest standard billet respectively. Figure 5 As shown, the longest standard billet and the shortest standard billet are respectively transported by rollers so that their front ends in the above-mentioned running direction (i.e., equivalent to the A surface of the above-mentioned billet) reach the above-mentioned first designated position. In this process, the above-mentioned pushing device can be used to adjust the posture of the standard billet.

[0079] like Figure 5 As shown in (a) and (b), during the process of measuring the longest standard billet and the shortest standard billet, the incident angle of the laser rangefinder is adjusted so that at the incident angle α, the laser emitted by the laser rangefinder falls on the rear ends of the longest standard billet and the shortest standard billet in the running direction, and does not fall outside the range of the cross section.

[0080] The correction method proposed in the embodiment of the present application uses the longest standard billet and the shortest standard billet as the upper and lower limits of the measurement to find a suitable incident angle of the laser rangefinder, thereby ensuring that billets with a length between the longest standard billet and the shortest standard billet can be measured at this incident angle, thereby improving the adaptability of the above-mentioned online billet length measurement system and reducing the amount of operations in actual use.

[0081] The incident angle of the laser rangefinder can also be determined by the known length of the standard blank, which has a smaller error than directly measuring or determining the angle of the laser rangefinder.

[0082] In some examples, the above step S110 may include:

[0083] First, the longest standard billet is transported via a roller conveyor so that the front end of the longest standard billet in the running direction reaches the first designated position.

[0084] The shortest standard billet is then transported via a roller conveyor so that the front end of the shortest standard billet in the running direction reaches the first designated position.

[0085] The above step S120 may include:

[0086] When the front end of the longest standard billet in the running direction reaches the first designated position, the laser distance measurement is adjusted so that the laser emitted by the laser distance meter falls on the rear end of the longest standard billet in the running direction at the minimum incident angle.

[0087] When the front end of the shortest standard billet in the running direction reaches the first designated position, it is verified whether the laser emitted by the laser rangefinder falls on the rear end of the shortest standard billet in the running direction.

[0088] Exemplarily, the longest standard billet is transported first, and when its front end in the running direction reaches the first designated position, the laser rangefinder is adjusted so that the laser it emits falls exactly on the upper edge of the rear end of the longest standard billet in the running direction. At this time, its incident angle should be the minimum incident angle to ensure that the laser falls on the rear end.

[0089] Then, the laser rangefinder is kept stationary, and the shortest standard billet is transported. When the front end of the shortest standard billet in the running direction reaches the first designated position, it is verified whether the currently emitted laser can still fall on the rear end of the shortest standard billet in the running direction.

[0090] Figure 6 A schematic diagram of an application for determining the incident angle of a laser rangefinder provided in an embodiment of the present application is shown in FIG. Figure 6 As shown, when the currently emitted laser can fall on the rear end, it indicates that the laser rangefinder can measure the steel billet whose length falls between the longest standard billet and the shortest standard billet at the current angle.

[0091] According to the length K4 of the shortest standard billet in the running direction, and the distance K1 between the laser rangefinder and the plane where the front end of the shortest standard billet in the running direction is located in the running direction, K2 is obtained according to the difference between K1 and K4, and the distance K3 fed back by the laser rangefinder is based on the formula:

[0092]

[0093] The incident angle θ of the laser rangefinder at this time can be obtained.

[0094] After obtaining the incident angle θ, we can use the previous formula:

[0095] Billet length = L2-L1 cosθ

[0096] Calculate the length of the billet to be measured.

[0097] An embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program. When the computer program runs on a computer or a processor, the computer or the processor executes the steps of the method described in the second aspect.

[0098] The present application also provides an electronic device, including:

[0099] Memory for storing computer programs;

[0100] A processor is used to execute the computer program to implement the steps of the method described in the second aspect.

[0101] For example, Figure 7 As shown, the electronic device includes a processor 710, at least one communication bus 720, a user interface 730, at least one external communication interface 740 and a memory 750. The communication bus 720 is configured to realize the connection and communication between these components. The user interface 730 may include a display screen, and the external communication interface 740 may include a standard wired interface and a wireless interface. The memory 750 stores a computer program. The processor 710 is used to execute the computer program stored in the memory 750.

[0102] The description of the above computer program product, computer-readable storage medium, and electronic device is similar to the description of the above method embodiment, and has similar beneficial effects as the method embodiment. For technical details not disclosed in the computer program product, computer-readable storage medium, and electronic device of this application, please refer to the description of the method embodiment of this application for understanding.

[0103] The sequence of serial numbers or introduction of the embodiments of the present application is for description only and does not represent the superiority or inferiority of the embodiments.

[0104] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0105] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0106] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0107] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access, or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a digital versatile disc (DVD)), or a semiconductor medium (e.g., a solid state disk (SSD)). It is worth noting that the computer-readable storage medium mentioned in the embodiment of the present application may be a non-volatile storage medium, in other words, a non-transient storage medium.

[0108] It should be noted that the information (including but not limited to user device information, user personal information, etc.), data (including but not limited to data for analysis, stored data, displayed data, etc.) and signals involved in the embodiments of this application are all authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with the relevant laws, regulations and standards of the relevant countries and regions. For example, the scene data of the current frame in the three-dimensional virtual scene, the device information of the client, and the scene interaction information involved in the embodiments of this application are all obtained with full authorization.

[0109] Similar parts between the embodiments provided in this application can be referenced to each other. The specific implementation methods provided above are only a few examples under the general concept of this application and do not constitute a limitation on the protection scope of this application. For those skilled in the art, any other implementation methods expanded based on the scheme of this application without creative work belong to the protection scope of this application.

Claims

1. An online billet length measurement system, characterized in that: Used in a hot rolling production line, the hot rolling production line is used to roll steel billets, the hot rolling production line includes a roller table, the roller table is used to transport the steel billets, and the system includes: A laser rangefinder, used for emitting laser light at a certain incident angle to the rear end of the billet in the running direction, and the laser light emitted by the laser rangefinder is parallel to the plane where the roller is located; A first sensor, used for detecting whether the front end of the steel billet in the running direction reaches a first designated position; A processing device, the processing device is communicatively connected to the laser rangefinder and the first sensor respectively, and is used for obtaining, when the first sensor detects that the front end of the steel billet in the running direction reaches the first designated position, a first distance fed back by the laser rangefinder based on the currently emitted laser, and a second distance in the running direction between the emission point of the laser rangefinder and the plane where the front end of the steel billet in the running direction is located, and determining the length of the steel billet in the running direction based on the first distance, the second distance and the incident angle.

2. The system according to claim 1, characterized in that Also includes: a second sensor, the second sensor being communicatively connected to the processing device; The second sensor is used to detect whether the front end of the steel billet in the running direction reaches a second designated position, and the second designated position is reached before the first designated position; The processing device is further configured to control the roller to decelerate the steel billet and run it to the first designated position when the second sensor detects that the front end of the steel billet in the running direction reaches the second designated position.

3. The system according to claim 2, characterized in that Also includes: a third sensor, the third sensor being communicatively connected to the processing device; The third sensor is used to detect whether the front end of the steel billet in the running direction reaches a third designated position, and the third designated position is between the first designated position and the second designated position; A correction device, the correction device is communicatively connected with the processing device; The processing device is also used to control the roller to stop the steel billet and control the pushing device to adjust the posture of the steel billet when the third sensor detects that the front end of the steel billet in the running direction reaches the third designated position.

4. The system according to claim 3, characterized in that The first sensor comprises a hot and cold detector; and / or, The second sensor comprises a hot and cold detector; and / or, The third sensor includes a hot and cold detector.

5. The system according to claim 3, characterized in that The pushing and correcting device comprises: A hydraulic pusher, the hydraulic pusher is in communication with the processing device, and the hydraulic pusher is used to adjust the posture of the steel billet based on the instruction of the processing device; A pressure switch is communicatively connected with the processing device, the pressure switch is used to detect a pressure signal, and the processing device is also used to control the hydraulic pusher to return to the center position based on the pressure signal, and the pressure signal is used to indicate the contact between the hydraulic pusher and the billet.

6. The system according to any one of claims 1 to 5, characterized in that The processing device comprises: A programmable logic processor, wherein the programmable logic processor is communicatively connected with the laser rangefinder and the first sensor respectively; switches, the switches being communicatively connected to the programmable logic processors respectively; An industrial computer, the industrial computer being communicatively connected with the switch; The programmable logic processor is used to collect data from the laser rangefinder and the first sensor, and send the data to the industrial computer through the switch, and the industrial computer is used to determine the length of the steel billet in the running direction based on the data.

7. A calibration method, characterized in that: For use in a system as claimed in any one of claims 1 to 6, the correction method comprises: The longest standard billet and the shortest standard billet are respectively transported through the roller conveyor so that the front ends of the longest standard billet and the shortest standard billet in the running direction both reach the first designated position, wherein the length of the billet in the running direction is between the lengths of the longest standard billet and the shortest standard billet in the running direction, and the cross section of the billet in the running direction is the same as the cross sections of the longest standard billet and the shortest standard billet in the running direction; The incident angle of the laser rangefinder is adjusted so that at the incident angle, the laser emitted by the laser rangefinder falls on the rear ends of the longest standard billet and the shortest standard billet in the running direction.

8. The calibration method according to claim 7, characterized in that: The step of transporting the longest standard billet and the shortest standard billet through the roller respectively comprises: First, the longest standard billet is transported through the roller conveyor so that the front end of the longest standard billet in the running direction reaches the first designated position; Then the shortest standard billet is transported through the roller conveyor so that the front end of the shortest standard billet in the running direction reaches the first designated position; The step of adjusting the incident angle of the laser rangefinder comprises: When the front end of the longest standard billet in the running direction reaches the first designated position, adjusting the laser distance measurement so that the laser emitted by the laser distance meter falls on the rear end of the longest standard billet in the running direction at a minimum incident angle; When the front end of the shortest standard billet in the running direction reaches the first designated position, it is verified whether the laser emitted by the laser rangefinder falls on the rear end of the shortest standard billet in the running direction.

9. An electronic device, characterized in that: include: Memory for storing computer programs; A processor, configured to execute the computer program to implement the steps of the method according to claim 7 or 8.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program runs on a computer or a processor, the computer or the processor executes the steps of the method according to claim 7 or 8.

Images