Online measurement method and device for overall length size of blooming steel billet

Abstract

The invention discloses an online measurement method and device for the overall length size of a blooming steel billet, and the device is arranged at a shearing section behind a blooming mill, and comprises an in-place signal detector which is arranged in front of a shearing device of the shearing section and is used for detecting whether the blooming steel billet reaches a shearing station or not; the shear blade action detector is connected with the shearing device and is used for detecting whether a shear blade of the shearing device performs head cutting treatment on the blooming steel billet or not; the industrial camera is arranged above the conveying roller way at the front end of the shearing device and is used for collecting a tail image of the current blooming steel billet in real time; and the length measuring unit is used for receiving signals transmitted by the in-place signal detector and the shear blade action detector, outputting a collection instruction to the industrial camera, and obtaining the full-length size of the blooming steel billet according to an image collected by the industrial camera. Through online measurement, the overall length size of the blooming steel billet is obtained, and the estimation error and the cutting loss rate of the steel billet are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of measurement of initial rolling production process, and in particular to an online measurement method and device for the full-length size of an initial rolled steel billet. Background Art

[0002] Primary rolling is the process of rolling steel ingots or continuous casting billets into raw steel billets of the specifications required by the finished rolling mills in the next process, creating conditions for the production of multiple varieties of steel products. It has the advantages of flexible specification changes, easy small-batch production, and uniform rolled microstructure. In primary rolling production, steel ingots or continuous casting billets are heated and then rolled in the primary rolling mill. The rolled billets are sheared and segmented according to the required size and then sent to the next process. In the billet shearing and segmenting operation, the billets need to be segmented according to a certain length size according to product and process requirements. Before shearing and segmenting, the full length of the billet needs to be known to ensure that the segmentation is reasonable and the amount of cutting loss is reduced.

[0003] The steel billets rolled by the primary rolling mill are transported by conveyor rollers. Due to the large span of the full length of the steel billets, the hot moving steel billets are prone to shift and tilt on the conveyor rollers. In addition, the influence of many factors such as on-site environmental restrictions makes measurement very difficult. At present, there is no means to measure the full length of the steel billets online. In actual production, the length of the steel billets is estimated based on the weight and cross-sectional dimensions of the steel billets, which has a large error. It is easy to cause the size of the steel billets to fail to meet the process requirements when they are sheared to the last section, and they can only be used as waste, resulting in a high cutting loss rate of the steel billets. Summary of the invention

[0004] In view of the problem in the prior art that the full length of the initial rolled steel billet cannot be measured online, the purpose of the present invention is to provide an online measurement method and device for the full length of the initial rolled steel billet, wherein the shear blade position of the shearing device is used as the measurement and positioning starting point, and an industrial camera is used to perform real-time measurement of the steel billet on the conveyor roller to determine the tail position of the steel billet, thereby obtaining the full length of the initial rolled steel billet; the present invention obtains the full length of the initial rolled steel billet before shearing through online measurement, and can subsequently calculate the shear segment length more accurately.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] The first aspect of the present invention provides an online measuring device for the full length size of a blooming steel billet, which is arranged in the shearing section behind the blooming mill, comprising:

[0007] An arrival signal detector is arranged in front of the shearing device of the shearing section to detect whether the initial rolled steel billet has reached the shearing station;

[0008] a shearing blade action detector connected to the shearing device to detect whether the shearing blade of the shearing device performs a head cutting process on the initially rolled steel billet;

[0009] An industrial camera is arranged above the conveying roller at the front end of the shearing device to collect the tail image of the current initially rolled steel billet in real time;

[0010] The length measuring unit is used to receive the signals transmitted by the in-position signal detector and the shear blade action detector, output the acquisition instruction to the industrial camera, and obtain the full length size of the initial rolled steel billet according to the image collected by the industrial camera.

[0011] Preferably, the arrival signal detector is a hot metal detector.

[0012] Preferably, the shear blade action detector is a signal sensor.

[0013] Preferably, the length measuring unit is an industrial computer device.

[0014] A second aspect of the present invention provides an online method for measuring the full length of a bloom, comprising the following steps:

[0015] During the segmented shearing operation of the initial rolled steel billet, the shear blade position of the shearing device is used as the starting point for measurement and positioning, and the initial rolled steel billet full-length online measurement device as described in the first aspect of the present invention is used to perform online measurement of the initial rolled steel billet to determine the tail position of the initial rolled steel billet and obtain the full-length size of the initial rolled steel billet.

[0016] Preferably, the online measurement of the initially rolled steel billet specifically comprises the following steps:

[0017] S1, when the arrival signal detector detects that a new billet has entered the shearing station, it transmits the billet arrival signal to the length measuring unit;

[0018] S2, the length measuring unit detects the action signal of the shearing blade on the shearing device through the signal sensor. When the signal sensor detects that the shearing blade of the shearing device is moving to perform billet head cutting processing, the industrial camera collects the tail image of the current initially rolled billet in real time;

[0019] S3, a length measuring unit determines the tail position of the rough rolled steel billet according to the tail image, and calculates the full length of the rough rolled steel billet.

[0020] Preferably, in step S3, the full length of the initially rolled steel billet is calculated by the following formula:

[0021] L=L1-L2+L3

[0022] Where, L is the full length of the initial rolled billet, in m;

[0023] L1 is the distance between the industrial camera and the shearing blade of the shearing device, in meters;

[0024] L2 is the distance between the measurement boundary of the industrial camera close to the shearing device and the industrial camera, in meters;

[0025] L3 is the length of the initial rolled steel billet within the measurement range of the industrial camera, in meters.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The online measurement method and device for the full-length size of the initial rolled steel billet of the present invention obtains the full-length size of the initial rolled steel billet based on shear blade positioning and combined with image calculation, utilizes the moment of billet head cutting, takes the shear blade position of the shearing device as the measurement and positioning starting point, that is, the head position of the steel billet, and simultaneously uses an industrial camera to measure the steel billet on the conveyor roller in real time to determine the tail position of the steel billet, and then calculates the full-length size of the steel billet based on the head and tail positions of the steel billet, and can more accurately calculate the length of the shearing segment, thereby reducing the error caused by estimating the length of the steel billet due to the weight and cross-sectional size of the steel billet, and solves the problem of high billet cutting loss rate caused by estimation error. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0029] Figure 1 It is a structural schematic diagram of an online measuring device for the full length dimension of a blooming steel billet according to the present invention;

[0030] Figure 2 It is a schematic flow chart of the online measurement method of the full length size of the initial rolled steel billet of the present invention;

[0031] Figure 3 It is a schematic diagram of the full-length dimension measurement of the initial rolled steel billet of the present invention. DETAILED DESCRIPTION

[0032] The present invention will be described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form.

[0033] According to the requirements of the initial rolling production process, since the head shape of the rolled steel billet is irregular, it is necessary to perform head trimming (cut off the irregular head section) before transporting it to the shearing station. In view of the current status and existing problems of the full-length dimension measurement technology of the initial rolled steel billet, the present invention proposes an online full-length dimension measurement method and device for the initial rolled steel billet, which uses shear blade positioning and combines image calculation to obtain the full-length dimension of the initial rolled steel billet, and uses the shear blade position of the shearing device as the measurement positioning starting point at the moment of head trimming of the initial rolled steel billet, that is, the head position of the initial rolled steel billet. At the same time, the initial rolled steel billet on the conveyor roller is measured in real time by an industrial camera to determine its tail position, and then the full-length dimension of the initial rolled steel billet is calculated in combination with the head position of the initial rolled steel billet. That is, since the distance and position between the camera and the shear blade are fixed, the distance between the tail position of the steel billet and the shear blade can be calculated, and the shear blade position is the head position of the steel billet, so the distance between the tail of the steel billet and the shear blade is the full-length dimension of the steel billet.

[0034] Combination Figure 1 As shown, the present invention provides an online measuring device for the full length size of a blooming steel billet, which is arranged in the shearing section behind the blooming mill, and comprises

[0035] The arrival signal detector 4 is arranged in front of the shearing device 3 of the shearing section, and is a hot metal detector for detecting whether the rough rolled steel billet 1 has reached the shearing station. When a new rough rolled steel billet 1 enters the shearing station, the arrival signal detector 4 transmits the steel billet arrival signal to the length measuring unit 7;

[0036] The shearing blade action detector 5 is connected to the shearing device 3 and is a signal sensor for detecting whether the shearing blade of the shearing device 3 performs a head cutting process on the initially rolled steel billet 1. When it is detected that the shearing blade of the shearing device 3 performs a head cutting process on the steel billet, the shearing blade action detector 5 transmits a steel billet head cutting signal to the length measuring unit 7;

[0037] The industrial camera 6 is arranged above the conveyor roller 2 at a certain distance from the front end of the shearing device 3. It is an image measuring device, which is used to collect the tail image of the current rough rolled billet 1 in real time while the shearing blade of the shearing device 3 is cutting the billet head, and transmit the collected tail image of the current rough rolled billet 1 to the length measuring unit 7. The distance between the industrial camera 6 and the shearing blade is fixed, and its installation position needs to be determined according to the specification length range of the rough rolled billet 1 and the measurement range of the industrial camera 6 to ensure that all rough rolled billet lengths can be covered.

[0038] The length measurement unit 7 is the core part of the whole device and is an industrial computer device, which mainly completes the signal and image data acquisition, processing, calculation and other tasks. The length measurement unit 7 has the functions of image and signal data acquisition, processing, analysis and recognition, length calculation, etc., and is used to receive the signal transmitted by the in-place signal detector 4 and the shearing blade action detector 5, output the acquisition instruction to the industrial camera 6, and obtain the full length size of the initial rolled steel billet 1 through length model calculation and analysis based on the image collected by the industrial camera 6.

[0039] Combination Figure 2 As shown, the present invention also provides an online measurement method for the full length size of a rough rolled steel billet, comprising the following steps:

[0040] During the segmented shearing operation of the initial rolled steel billet, the shear blade position of the shearing device is used as the starting point for measurement and positioning, and the initial rolled steel billet full-length dimension online measurement device mentioned above is used to measure the initial rolled steel billet online to determine the tail position of the initial rolled steel billet and obtain the full-length dimension of the initial rolled steel billet.

[0041] In a specific embodiment, the online measurement of the initially rolled steel billet specifically comprises the following steps:

[0042] S1, when the arrival signal detector detects that a new billet has entered the shearing station, it transmits the billet arrival signal to the length measuring unit;

[0043] S2, after the length measuring unit receives the signal that the steel billet is in place, the signal sensor detects the action signal of the shearing blade on the shearing device. When the signal sensor detects the action of the shearing blade of the shearing device to cut the steel billet head, the industrial camera collects the tail image of the current initially rolled steel billet in real time;

[0044] S3, the length measuring unit identifies and calculates the tail position of the initial rolled steel billet according to the tail image, and calculates the full length of the initial rolled steel billet according to the tail position of the initial rolled steel billet and the shear blade position of the shearing device.

[0045] Combination Figure 3 The schematic diagram of the full-length measurement of the initial rolled steel billet is shown. The position of the head of the steel billet is determined by the shear blade position, and the position of the tail of the steel billet is determined by combining the industrial camera image measurement, thereby realizing the measurement of the full-length size. Among them, the distance L1 between the shear blade position A and the industrial camera position B is fixed, and the length L2 between the measurement boundary C on the side of the industrial camera position B close to the shear blade position and the industrial camera position B is also fixed. The difference in the length of the initial rolled steel billet is actually the difference in the position of point D. The position of point D is measured by the industrial camera, and the length L3 from point D to point C is calculated. Therefore, the full-length size of the initial rolled steel billet is calculated by the following formula:

[0046] L=L1-L2+L3

[0047] Where, L is the full length of the initial rolled billet, in m;

[0048] L1 is the distance between the industrial camera and the shearing blade of the shearing device, in meters;

[0049] L2 is the distance between the measurement boundary of the industrial camera close to the shearing device and the industrial camera, in meters;

[0050] L3 is the length of the initial rolled steel billet within the measurement range of the industrial camera, in meters.

[0051] The following is a further introduction to an online measurement method and device for the full-length dimensions of an initially rolled steel billet with reference to a specific example.

[0052] Example

[0053] In this embodiment, Figure 1 The online measuring device for the full length dimension of the initial rolled steel billet shown in the figure measures the full length dimension of the initial rolled steel billet online;

[0054] The length range of the measured initial rolled steel billet is 15m to 25m, the distance L1 from the installation position of the industrial camera 6 to the shear blade position of the shearing device 3 is 20m, the measuring range of the industrial camera 6 is 12m, and the distance L2 from the measuring boundary close to the shearing device 3 to the industrial camera 6 is 6m.

[0055] The rough rolled steel billet to be sheared enters the shearing station. After the arrival signal detector 4 detects that a new rough rolled steel billet 1 has arrived at the shearing station on the conveyor roller 2, the system starts. When the length measuring unit 7 detects the shearing action of the shearing device 3 through the shearing action detector 5 to perform the billet head cutting process, the tail image of the rough rolled steel billet 1 is collected through the industrial camera 6. After obtaining the tail image data of the rough rolled steel billet 1, the length measuring unit 7 analyzes and processes the tail image data, identifies and extracts the rough rolled steel billet data, and calculates the length value L3=7m of the rough rolled steel billet within the camera measurement range. The length measuring unit 7 calculates the total length of the billet L=L1-L2+L3=20-6+7=21m according to the billet length calculation formula, and completes this measurement.

[0056] In summary, the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. An online measuring device for the full length size of a blooming steel billet, arranged in the shearing section behind the blooming mill, characterized in that: include An arrival signal detector is arranged in front of the shearing device of the shearing section to detect whether the initial rolled steel billet has reached the shearing station; a shearing blade action detector connected to the shearing device to detect whether the shearing blade of the shearing device performs a head cutting process on the initially rolled steel billet; An industrial camera is arranged above the conveying roller at the front end of the shearing device to collect the tail image of the current initially rolled steel billet in real time; The length measuring unit is used to receive the signals transmitted by the in-position signal detector and the shear blade action detector, output the acquisition instruction to the industrial camera, and obtain the full length size of the initial rolled steel billet according to the image collected by the industrial camera.

2. The online measuring device for the full length dimension of the bloom according to claim 1, characterized in that: The arrival signal detector is a hot metal detector.

3. The on-line measuring device for the full length dimension of the bloom according to claim 1, characterized in that: The shear blade motion detector is a signal sensor.

4. The on-line measuring device for the full length dimension of the bloom according to claim 1, characterized in that: The length measuring unit is an industrial computer device.

5. A method for measuring the full length of a slab in an online manner, characterized in that: The following steps are involved: During the segmented shearing operation of the initial rolled steel billet, the shear blade position of the shearing device is used as the starting point for measurement and positioning, and the initial rolled steel billet full-length online measurement device as described in any one of claims 1 to 4 is used to measure the initial rolled steel billet online to determine the tail position of the initial rolled steel billet and obtain the full-length size of the initial rolled steel billet.

6. The method for online measurement of the full length dimension of the bloom according to claim 5, characterized in that: The online measurement of the bloom steel billet specifically comprises the following steps: S1, when the arrival signal detector detects that a new billet has entered the shearing station, it transmits the billet arrival signal to the length measuring unit; S2, the length measuring unit detects the action signal of the shearing blade on the shearing device through the signal sensor. When the signal sensor detects that the shearing blade of the shearing device is moving to perform billet head cutting processing, the industrial camera collects the tail image of the current initially rolled billet in real time; S3, a length measuring unit determines the tail position of the rough rolled steel billet according to the tail image, and calculates the full length of the rough rolled steel billet.

7. The method for online measuring the full length dimension of the bloom according to claim 6, characterized in that: In step S3, the full length of the initially rolled steel billet is calculated by the following formula: L=L1-L2+L3 Where, L is the full length of the initial rolled billet, in m; L1 is the distance between the industrial camera and the shearing blade of the shearing device, in meters; L2 is the distance between the measurement boundary of the industrial camera close to the shearing device and the industrial camera, in meters; L3 is the length of the initial rolled steel billet within the measurement range of the industrial camera, in meters.

Images