System and method capable of measuring casting blank size on line

Abstract

The invention relates to a system and a method capable of measuring the size of a casting blank on line, and the method comprises the steps: installing a photoelectric trigger and range finders on a continuous casting ejection roller way, respectively measuring the distances from the two range finders to narrow surfaces at two sides by using the two range finders which work synchronously at the same frequency, judging the reasonability of a width value, and storing width data at a computer end. Then width data in the length direction and the thickness reverse direction of the casting blank are measured through movement of the distance measuring instrument, the length and width sizes of the casting blank are calculated through the measured reasonable width value display range or the position change of the distance measuring instrument, and the width, the length, the thickness and curve data of the width, the length and the thickness are displayed on a computer end after numerical value correction. According to the invention, the continuous measurement of the casting blank size and the effective storage of the measurement data can be realized, the measurement size types are various, the measurement time is short, the precision is high, the manual labor intensity can be reduced, and the safety risk factors are reduced.

Description

Technical Field

[0001] This patent application belongs to the technical field of continuous casting in iron and steel metallurgy, and more specifically, relates to a system and method for online measurement of ingot size. Background Art

[0002] In order to ensure the dimensional stability of the rough rolling inlet and reduce the adjustment changes of the rolling mill width adjustment equipment, the ingot size should be measured after the fixed-length cutting is completed during the continuous casting process to ensure that the ingot width and length meet the ingot setting requirements. At present, the continuous casting production line mainly measures the ingot size by manual spot checks on the billet roller after the billet is cut. Not only is the working environment temperature high, which is not conducive to long-term work, it is impossible to ensure that each billet is measured and a long-term record is formed. At the same time, when the billet stays for a short time, it is impossible to achieve effective measurement, and the measurement results are not stable enough.

[0003] The utility model patent with Chinese patent application number 201520367311.1 and the invention patent with application number 201510292082.6 disclose a method and system for online measurement of high-speed conveyed cut continuous casting billets. The method adopts a trigger switch and a distance meter. The distance meter is placed above the billet discharge roller to measure the horizontal distance of the billet head or billet tail of the cut continuous casting billet to calculate the length of the billet. The method is simple and has high measurement accuracy. However, due to the installation position of the distance meter, the width and thickness of the billet cannot be measured, the requirement of measuring all dimensions cannot be met, and the problem of lack of online dimension detection in the current continuous casting cannot be solved. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a system and method for online measurement of the size of the ingot, which can measure all the sizes of the ingot and effectively solve the problem of lack of online size detection in the current continuous casting.

[0005] In order to solve the above problems, the technical solution adopted by the present invention is:

[0006] A system capable of measuring the size of a cast billet online comprises a rangefinder moving roller, a moving device arranged on the rangefinder moving roller, a lifting device arranged on the moving device, a rangefinder located on the lifting device, a computer system connected to the rangefinder, and a photoelectric trigger connected to the computer system. The number of the photoelectric triggers is plural and they are installed on a billet discharge roller. The rangefinder moving roller is arranged on both sides of the billet discharge roller. The billet discharge roller has billets that have been cut to a predetermined length. All the photoelectric triggers are installed upstream in the direction of billet movement and on the lower side of the billet discharge roller.

[0007] The lifting device and the moving device are both connected to the computer system, and the computer system is also connected to the secondary continuous casting system. The information such as the billet number, cross-section specifications, and length can be automatically obtained from the secondary continuous casting system. The two distance meters are installed perpendicular to the forward direction of the billet and work synchronously and at the same frequency.

[0008] Furthermore, the moving device includes a bracket, a rotating shaft installed at the bottom of the bracket, the lifting device is located on the bracket, and the rotating shaft rotates in coordination with the moving roller of the rangefinder.

[0009] Furthermore, the distance between the moving track of the rangefinder and the blank discharge track is ≥0.2-0.5m.

[0010] Furthermore, the number of photoelectric triggers is 2 to 40, so as to improve the detection accuracy of the casting.

[0011] A method for measuring the size of a casting ingot online is implemented by the above system, and the method comprises the following steps:

[0012] S1, when the first photoelectric trigger detects that a billet passes through the billet discharge roller of the continuous casting operation, a detection signal is synchronously sent to the computer system, and the computer system records the time t1, the billet size measurement system of the present invention starts preparation work, and the rangefinder moves to the starting position and waits;

[0013] S2, when the second photoelectric trigger detects that a billet passes through the billet discharge roller, it synchronously sends a detection signal to the computer system again, and the computer system records the time t2. The billet size measurement system starts working, and the distance meters on both sides of the billet discharge roller measure the distance to the narrow surface of the billet, which are L1 and L2 respectively;

[0014] S3. Calculate the width of the billet W = L-L1-L2, where L represents the horizontal distance between the two distance meters perpendicular to the advancing direction of the billet;

[0015] S4. Determine whether to measure the thickness and length of the ingot according to the inspection plan;

[0016] S5. If measuring the length of the ingot, follow the steps below:

[0017] S51, the distance meter continuously measures the width data of the casting billet along the moving direction of the casting billet;

[0018] S52, when the trigger condition is met, the computer system starts to record the measurement data, and displays the width data and the width curve on the terminal;

[0019] S53. When the termination condition is met, the computer system calculates the length of the ingot according to the width curve or the moving distance of the distance meter:

[0020] Reference Figure 3By continuously measuring the width data of the billet, during which the moving speed v of the rangefinder is greater than the moving speed v of the billet, the width curve of the billet in the length direction can be obtained. Although the billet width may fluctuate, there will be obvious changes in the width value at the head and tail of the billet. By collecting the change points of the two width values ​​at the head and tail of the billet and recording the time interval t, the single length can be calculated.

[0021] ① When the distance meter and the billet move in the same direction, the billet length S = S2-S1-v*t 长 Or S=(v 长 -v)*t 长 , S1-slab starting position, S2-slab ending position; when v 长 When it is much larger than v, t 长 If it is short enough, the length data can also be directly read in the spatial network system constructed by the rangefinder, and finally the purpose of completing the length measurement by measuring the width change can be achieved;

[0022] ② When the distance meter and the billet move in opposite directions, the billet length S = S1-S2-v*t 长 Or S=(v 长 +v)*t 长 , S1-slab starting position, S2-slab ending position; when v 长 When +v is large enough, t 长 If it is short enough, the length data can also be directly read in the spatial network system constructed by the rangefinder, and finally the purpose of completing the length measurement by measuring the width change can be achieved;

[0023] ③ When the distance meter remains stationary, the length of the billet S = v*t 长 .

[0024] S6. If the thickness of the ingot is to be measured, follow the steps below:

[0025] S61, calculating the moving speed v=D / (t2-t1) of the billet on the billet roller, where D is the horizontal distance between the two photoelectric triggers parallel to the moving direction of the billet;

[0026] S62, when the width of the ingot is detected, the distance meter keeps moving at the same speed as the moving speed v of the ingot and the speed deviation between the two is ≤20%, and at the same time, the lifting device moves the distance meter to the thickness direction of the ingot, and the thickness direction includes the upper side of the upper surface of the ingot or the lower side of the lower surface;

[0027] S63, the lifting device is started and moves upward or downward with the distance meter to continuously measure the width of the ingot;

[0028] S64, when the trigger condition is met, the computer system records the width measurement data, and displays the width measurement data and the width curve on the terminal;

[0029] Reference Figure 4 , by continuously measuring the width of the billet, the moving speed of the distance meter is consistent with the moving speed of the billet, and the lifting device is started, and the lifting device moves at v 厚 The width curve of the billet in the thickness direction is measured at a speed of 10000. This will produce obvious width value changes on the upper and lower surfaces of the billet. By collecting the change points of the two width values ​​and recording the time interval t 厚 , we can calculate the thickness T = v 厚 *t 厚 , or directly read the vertical distance between the two measuring endpoints in the spatial network system constructed by the rangefinder as the thickness measurement result, and finally achieve the purpose of completing the thickness measurement by measuring the width change.

[0030] S65. When the termination condition is met, the computer system calculates the thickness of the ingot based on the width curve or the moving distance of the rangefinder.

[0031] Furthermore, the detection frequency of the photoelectric trigger is ≥1-10 Hz, the delay time is ≤10 ms, and it is installed on the top, bottom or side of the billet discharge roller.

[0032] Furthermore, the rangefinder is a laser rangefinder, the laser power of the laser rangefinder is ≤1mW, the rangefinder accuracy is ≤±1-2mm, and the minimum measuring distance is ≤0.2-0.5m.

[0033] Furthermore, the trigger condition is that the computer detects that the width value is within the reasonable range of the billet width setting value. Depending on the type of casting machine and the production capacity, the general reasonable range of the billet width setting value may be 100 to 8000 mm, and the preferred reasonable range may be 100 to 5500 mm. For a specific production line, the setting value may be further optimized; the termination condition is when the rangefinder measures beyond the billet size, the detected width exceeds the reasonable range of the billet width setting value or a numerical error occurs; the reasonable range of the setting value may be set and adjusted according to the actual situation on site. The width value measured as the trigger condition does not participate in the length and thickness calculation.

[0034] Further, according to the width curve when calculating the thickness in S64, the convexity of the ingot can be calculated. The convexity of the ingot includes the wide surface bulging amount and the narrow surface bulging amount formed corresponding to the wide surface bulging defect and the narrow surface bulging defect.

[0035] Wide surface bulging amount = Tmax-Tmin, Tmax: maximum thickness of slab, Tmin: minimum thickness of slab;

[0036] Narrow side bulging amount = Wmax-Wmin, Wmax: maximum slab width, Wmin: minimum slab width.

[0037] Due to the adoption of the above technical solution, the beneficial effects achieved by the present invention are:

[0038] The present invention uses distance meters installed on both sides of the ingot to complete single-point measurement or continuous measurement by synchronously working with the distance meters, and finally calculates the width of the ingot. Then, the measured width data is used to calculate the length and thickness of the ingot. By comparing the set values ​​of the ingot length and thickness dimensions, a reasonable range is set, and this is used as the trigger condition and termination condition for measurement, thereby realizing automatic online measurement of the ingot size.

[0039] 1) It can realize the continuous measurement of the billet size and the effective storage of the measurement data, ensuring that the size data of each billet can be traced;

[0040] 2) This method and system can measure the width, length, thickness of the ingot, and even calculate the narrow side convexity of the ingot. One system can measure multiple sizes, reducing the investment of the enterprise;

[0041] 3) According to the different moving speeds of the billet on the billet discharge roller, the speed of the distance meter moving device and the measuring frequency of the distance meter can be adjusted to achieve the length and thickness measurement of different positions of the billet, with short measuring time and high accuracy;

[0042] 4) The application of online dimension measurement system can reduce the intensity of manual labor and reduce safety risk factors. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic diagram of the process of the present invention.

[0044] Figure 2 It is a schematic diagram of the structure of the system of the present invention.

[0045] Figure 3 It is a schematic diagram of the result of the length of the casting billet displayed on the computer side in the method of the present invention.

[0046] Figure 4 It is a schematic diagram of the measurement results of the thickness of the casting slab displayed on the computer side in the method of the present invention.

[0047] Figure 5 It is a schematic diagram of wide noodle bulging in the method of the present invention.

[0048] Figure 6 It is a schematic diagram of narrow noodle bulging in the method of the present invention.

[0049] Among them: 1-distance meter; 2-lifting device; 3-moving device; 4-distance meter moving roller; 5-cast billet that has been cut to size; 6-bill discharge roller; 7-photoelectric trigger; 8-computer system. DETAILED DESCRIPTION

[0050] The present invention is further described in detail below with reference to the embodiments.

[0051] A system capable of measuring the size of a cast billet online comprises a rangefinder moving roller 4, a moving device 3 arranged on the rangefinder moving roller 4, a lifting device 2 arranged on the moving device 3, a rangefinder 1 located on the lifting device 2, a computer system 8 connected to the rangefinder 1, and a photoelectric trigger 7 connected to the computer system 8. The number of the photoelectric triggers 7 is two and they are installed on a billet discharge roller 6. The rangefinder moving roller 4 is arranged on both sides of the billet discharge roller 6. The billet discharge roller 6 carries a billet 5 that has been cut to a predetermined length. Two photoelectric triggers 7 are installed upstream of the billet 5 in the moving direction and on the lower side of the billet discharge roller 6.

[0052] The lifting device 2 and the moving device 3 are both connected to the computer system 8, and the computer system 8 is also connected to the secondary continuous casting system. Information such as the billet number, cross-sectional specifications, and length cut-off can be automatically obtained from the secondary continuous casting system. The two distance meters 1 are installed perpendicular to the forward direction of the billet 5 and work synchronously and at the same frequency.

[0053] In terms of specific design, the moving device 3 includes a bracket, a rotating shaft installed at the bottom of the bracket, the lifting device 2 is located on the bracket, and the rotating shaft rotates with the distance meter moving roller 4. The distance between the distance meter moving track 4 and the blank discharge track 6 is ≥0.2-0.5m.

[0054] In order to improve the detection accuracy of the ingot 5, a plurality of photoelectric triggers 7 may be provided, the number of which is 2 to 40, preferably about 10. All photoelectric triggers 7 are located on the rangefinder moving roller 4. The reason is that if there is a high-precision requirement, a plurality of photoelectric triggers 7 may be expanded and added. The additional photoelectric triggers 7 are mainly used to calculate the interval moving speed and instantaneous moving speed of the ingot 5, and to improve the measurement accuracy of the length of the ingot 5 and the thickness of a certain section or part of the ingot 5. All photoelectric triggers 7 are connected to the computer system 8, such as Figure 2 shown.

[0055] Using the above system, the present invention provides a method for measuring the size of a casting billet online, comprising the following steps:

[0056] S1, when the first photoelectric trigger 7 detects that the billet 5 passes through the billet discharge roller 6 of the continuous casting operation, a detection signal is synchronously sent to the computer system 8, and the computer system 8 records the time t1, the billet size measurement system of the present invention starts preparation work, and the rangefinder 1 moves to the starting position and waits;

[0057] S2, when the second photoelectric trigger 7 detects that the billet 5 passes on the billet discharge roller 6, it synchronously sends a detection signal to the computer system 8 again, and the computer system 8 records the time t2. The billet size measurement system starts working, and the distance meters 1 on both sides of the billet discharge roller 6 respectively measure the distance to the narrow surface of the billet 5, which are L1 and L2 respectively;

[0058] S3, calculating the width W of the casting slab 5 = L - L1 - L2, where L represents the horizontal distance between the two distance measuring instruments 1 perpendicular to the advancing direction of the casting slab 5;

[0059] S4. Determine whether to measure the thickness and length of the ingot 5 according to the inspection plan;

[0060] S5. If the length of the ingot 5 is to be measured, the following steps are performed:

[0061] S51, the distance meter 1 continuously measures the width data of the casting billet 5 along the moving direction of the casting billet 5;

[0062] S52, when the trigger condition is met, the computer system 8 starts recording the measurement data and displays the width data and the width curve on the terminal;

[0063] S53, when the termination condition is met, the computer system 8 calculates the length of the ingot 5 according to the width curve or the moving distance of the distance meter 1:

[0064] Reference Figure 3 By continuously measuring the width data of the billet 5, during which the moving speed v of the rangefinder 1 is greater than the moving speed v of the billet 5, the width curve of the billet 5 in the length direction can be obtained. Although the width of the billet 5 may fluctuate, there will be obvious changes in the width value at the head and tail of the billet 5. By collecting the change points of the two width values ​​at the head and tail of the billet 5 and recording the time interval t, the single length can be calculated:

[0065] ① When the distance meter 1 and the billet 5 move in the same direction, the billet length S = S2-S1-v*t 长 Or S=(v 长 -v)*t 长 , S1-slab starting position, S2-slab ending position; when v 长 When it is much larger than v, t 长 Short enough, the length data can also be directly read in the spatial network system constructed by the rangefinder 1, and finally the purpose of completing the length measurement by measuring the width change is achieved;

[0066] ② When the distance meter 1 and the billet 5 move in opposite directions, the billet length S = S1-S2-v*t 长 Or S=(v 长 +v)*t 长 , S1-slab starting position, S2-slab ending position; when v长 When +v is large enough, t 长 Short enough, the length data can also be directly read in the spatial network system constructed by the rangefinder 1, and finally the purpose of completing the length measurement by measuring the width change is achieved;

[0067] ③ When the distance meter 1 remains stationary, the length of the billet S = v*t 长 .

[0068] S6. If the thickness of the ingot 5 is to be measured, the following steps are performed:

[0069] S61, calculating the moving speed v=D / (t2-t1) of the casting slab 5 on the casting roller 6, where D is the horizontal distance between the two photoelectric triggers 7 parallel to the moving direction of the casting slab 5;

[0070] S62, when the width of the ingot 5 is detected, the distance meter 1 keeps moving at the same speed as the moving speed v of the ingot 5, and at the same time, the lifting device 2 moves the distance meter 1 to the thickness direction of the ingot 5, and the thickness direction includes the upper side of the upper surface or the lower side of the lower surface of the ingot 5;

[0071] S63, the lifting device 2 is started and moves upward or downward with the distance meter 1 to continuously measure the width of the casting slab 5;

[0072] S64. When the trigger condition is met, the computer system 8 records the width measurement data, and displays the width measurement data and the width curve on the terminal.

[0073] Reference Figure 4 , by continuously measuring the width measurement data of the billet 5, during which the moving speed of the rangefinder 1 is consistent with the moving speed of the billet 5, the lifting device 2 is started, and the lifting device 2 measures the width curve of the billet 5 in the thickness direction at a speed of vthick, which will produce obvious width value changes on the upper and lower surfaces of the billet 5. By collecting the change points of the two width values ​​and recording the time interval t 厚 , we can calculate the thickness T = v 厚 *t 厚 , or directly read the vertical distance between the two measuring end points in the spatial network system constructed by the rangefinder 1 as the thickness measurement result, and finally achieve the purpose of completing the thickness measurement by measuring the width change.

[0074] S65. When the termination condition is met, the computer system 8 calculates the thickness of the ingot 5 according to the width curve or the moving distance of the distance meter 1.

[0075] In terms of selection, the rangefinder 1 is a laser rangefinder, the laser power of the laser rangefinder is ≤1mW, the rangefinder accuracy is ≤±1~2mm, and the minimum measuring distance is ≤0.2~0.5m.

[0076] In terms of parameter selection, the detection frequency of the photoelectric trigger 7 is ≥1-10 Hz, the delay time is ≤10 ms, and it is installed on the top, bottom or side of the billet discharge roller 6.

[0077] The trigger condition is that the computer detects that the width value is within the reasonable range of the billet width setting value. Depending on the type of casting machine and production capacity, the general reasonable range of the billet width setting value can be 100-8000mm, and the preferred reasonable range can be 100-5500mm. For a specific production line, the setting value can be further optimized; the termination condition is when the distance meter 1 measures beyond the size of the billet 5, the detected width exceeds the reasonable range of the billet 5 width setting value or a numerical error occurs; the reasonable range of the setting value can be set and adjusted according to the actual situation on site. The width value measured as the trigger condition does not participate in the length and thickness calculation.

[0078] Combination Figure 5 , Figure 6 According to the width curve when calculating the thickness in S64, the convexity of the ingot can be calculated. The convexity of the ingot includes the wide surface bulging amount and the narrow surface bulging amount corresponding to the wide surface bulging defect and the narrow surface bulging defect.

[0079] like Figure 5 , wide surface bulging amount = Tmax-Tmin, Tmax: maximum thickness of slab, Tmin: minimum thickness of slab;

[0080] like Figure 6 , narrow side bulging amount = Wmax-Wmin, Wmax: maximum slab width, Wmin: minimum slab width.

[0081] Two embodiments are listed below. Due to the differences in production capacity, equipment conditions, product types, product uses, and billet length of each production line, the following parameters or data are for reference only. Embodiment 1 is a medium slab continuous casting machine with a maximum production section specification of 1900 mm. Embodiment 2 is a small billet continuous casting machine with a minimum production section specification of 100 mm.

[0082] Example 1

[0083] like Figure 1 As shown, the method for measuring the size of the ingot online comprises the following steps:

[0084] 1) When the first photoelectric trigger detects that a billet has passed through the continuous casting billet roller, a detection signal is synchronously sent to the computer, and the computer records the time t1. The billet size measurement system starts preparation work, and the rangefinder moves to the starting position and waits;

[0085] 2) When the second photoelectric trigger detects that a billet has passed through the continuous casting billet discharge roller, it synchronously sends a detection signal to the computer again. The computer records the time t2, and the billet size measurement system starts working. The distance meters on both sides measure the distance from the narrow surface of the billet L1 = 1000mm and L2 = 1000mm respectively, t2-t1 = 12s;

[0086] 3) Calculate the width of the billet W = L-L1-L2 = 3900mm-1000mm-1000mm = 1900mm;

[0087] 4) Measure the length of the ingot according to the inspection plan;

[0088] 5) Measure the length of the ingot. ① The distance meter continuously measures the width of the ingot along the moving direction of the ingot, and the width range is 1896-1905 mm. ② When the trigger condition is met, the computer starts to record the measurement data and displays the width and width curve on the computer terminal. ③ When the termination condition is met, the computer calculates the length of the ingot based on the width curve or the moving distance of the distance meter.

[0089] In a preferred embodiment of the present invention, the billet moving speed v is 10 m / min, the response time of the photoelectric trigger is ≤ 10 ms, and the measuring frequency of the rangefinder can be selected as 200 Hz according to the billet moving speed;

[0090] The trigger condition is that the width value detected by the computer is within the reasonable range of the billet width setting value, and the present embodiment is set to the measured width value W≥1700mm; the termination condition is when the distance meter measures beyond the billet size range, and the present embodiment is set to the measured width value W<1700mm, the detected width exceeds the reasonable range of the billet width setting value or a numerical error occurs; the reasonable range of the setting value can be set and adjusted on the computer terminal according to the actual situation on site;

[0091] The system control arrangement of online billet size is as follows Figure 2 As shown, two photoelectric triggers 7 are installed on the lower side of the upstream billet discharge roller in the direction of billet movement, and the distance D between the two photoelectric triggers 7 is 2m; the roller 4 is 0.5m away from the outermost side of the billet discharge track 6; the horizontal distance L between the two distance meters 1 perpendicular to the forward direction of the billet is 3.9m; the two photoelectric triggers 7, the two distance meters 1, the lifting device 2 and the moving device 3 are all connected to the computer 8.

[0092] If you need to measure the length of the billet multiple times:

[0093] ① During the first measurement, the two distance meters 1 may not move, or in order to reduce the measurement time, the distance meters may keep moving in the opposite direction to the ingot.

[0094] ② After the first measurement is completed, the first length dimension calculation result is compared with the cut length of the billet 5. If the measurement result is within a reasonable range, the data is saved and used for length calculation; if the measurement result is not within a reasonable range, the data is saved but not used for length calculation. The first measurement distance meter 1 remains stationary, and the billet length S 第1次 =v*t 长 =10m / min*60s / 60=10m.

[0095] ③ Start the second measurement. The moving device 3 moves in the same direction as the billet 5 with a speed greater than the billet movement v. The lifting device 2 can move in a small range. After the measurement is completed again, the second length dimension calculation result is compared with the billet 5 cutting length. If the measurement result is within a reasonable range, the data is saved and used for length calculation. The second measurement distance meter 1 moves in the same direction as the billet 5. The billet length S 第2次 =S2-S1-v*t 长 =25m-10m-10m / min*30s / 60=10m or S 第2次 =(v 长 -v)*t 长 =(30m / min-10m / min)*30s / 60=10m; if the measurement result is not within a reasonable range, the data will be saved but will not be used for length calculation;

[0096] ④ Take the final length dimension involved in the calculation and calculate the average value S 平均值 =(S 第1次 +S 第2次 ) / 2 = (10m + 10m) / 2 = 10m;

[0097] ⑤Display each measurement result and the final result on the computer display interface.

[0098] Example 2

[0099] like Figure 1 As shown, the method for measuring the size of the ingot online comprises the following steps:

[0100] 1) When the first photoelectric trigger detects that a billet has passed through the continuous casting billet roller, a detection signal is synchronously sent to the computer, and the computer records the time t1. The billet size measurement system starts preparation work, and the rangefinder moves to the starting position and waits;

[0101] 2) When the second photoelectric trigger detects that a billet has passed through the continuous casting billet roller, it synchronously sends a detection signal to the computer again. The computer records the time t2, and the billet size measurement system starts working. The distance meters on both sides measure the distance from the narrow surface of the billet L1 = 800mm and L2 = 800mm respectively, t2-t1 = 6s;

[0102] 3) Calculate the width of the billet W = L-L1-L2 = 1700-800-800 = 100 mm;

[0103] 4) Measure the length and thickness of the ingot according to the inspection plan;

[0104] 5) Workflow of measuring the length of the ingot: ① The distance meter continuously measures the width of the ingot along the moving direction of the ingot, and the width range is 97-102 mm; ② When the trigger condition is met, the computer starts to record the measurement data and displays the width and width curve on the computer terminal; ③ When the termination condition is met, the computer calculates the length of the ingot based on the width curve or the moving distance of the distance meter;

[0105] 6) Workflow for measuring the thickness of the ingot: ① Calculate the moving speed of the ingot on the roller table v = D / (t2-t1) = 3m / 6s = 30m / min; ② When the width of the ingot is detected, the distance meter moves at the same speed as the moving speed v of the ingot, and the lifting device moves the distance meter to the upper side of the upper surface or the lower side of the lower surface of the ingot in the thickness direction of the ingot, and the lifting device speed v 厚 =5m / min; ③ The lifting device is started to move the distance meter upward or downward to continuously measure the width of the ingot; ④ When the trigger condition is met, the computer records the width measurement data and displays the width measurement data and width curve on the computer terminal; ⑤ When the termination condition is met, the computer calculates the thickness of the ingot based on the width curve or the moving distance of the distance meter; at this time, the lifting device is started with v 厚 The width curve of the billet in the thickness direction is measured at a speed of 10000. There will be obvious changes in the width value at the upper and lower surfaces of the billet. By collecting the change points of the two width values ​​and recording the time interval t 厚 , the thickness can be calculated, and the thickness of the nth time can be calculated as T n =v 厚 *t 厚 =5m / min*1000*1.2s / 60=100mm.

[0106] In a preferred embodiment of the present invention, the billet moving speed v is 30 m / min, the response time of the photoelectric trigger is ≤10 ms, and the measuring frequency of the rangefinder can be selected as 500 Hz according to the billet moving speed;

[0107] The trigger condition is that the computer detects that the width value is within the reasonable range of the billet width setting value, and this embodiment is set to a measured width value W ≥ 80 mm; the termination condition is when the rangefinder measures beyond the billet size range, and this embodiment is set to a measured width value W < 80 mm, the detected width exceeds the reasonable range of the billet width setting value or a numerical error occurs; the reasonable range of the setting value can be set and adjusted on the computer terminal according to the actual situation on site.

[0108] The system control arrangement of online billet size is as follows Figure 2 As shown, two photoelectric triggers 7 are installed on the upper side of the upstream billet discharge roller in the direction of billet movement, and the distance D between the two photoelectric triggers 7 is 3m; the roller 4 is 0.4m away from the outermost side of the billet discharge track 6; the horizontal distance L between the two distance meters 1 perpendicular to the forward direction of the billet is 1.7m; the two photoelectric triggers 7, the two distance meters 1, the lifting device 2 and the moving device 3 are all connected to the computer 8.

[0109] Measure the length of the billet. ① During the first measurement, the two distance meters 1 may not move, or in order to reduce the measurement time, the distance meters keep moving in the opposite direction of the billet. ② After the first measurement, compare the first length calculation result with the billet 5 cut length. If the measurement result is within a reasonable range, save the data and participate in the length calculation. If the measurement result is not within a reasonable range, save the data but do not participate in the length calculation. During the first measurement, the distance meter 1 moves in the opposite direction of the billet. The billet length S 第1次 =(v 长 +v)*t 长 =(60m / min+30m / min)*10s / 60=15m; ③ Start the second measurement, the moving device 3 keeps moving in the same direction as the billet 5 with a speed greater than the billet movement v, and the lifting device 2 can move in a small range. After the measurement is completed again, the second length dimension calculation result is compared with the billet 5 cutting length. If the measurement result is within a reasonable range, the data is saved and used for length calculation. The second measurement distance meter 1 moves in the same direction as the billet 5, and the billet length S 第2次 =S2-S1-v*t 长 =45m-15m-30m / min*30s / 60=15m or S 第2次 =(v 长 -v)*t 长 =(60m / min-30m / min)*30s / 60=15m; If the measurement result is not within a reasonable range, save the data but do not participate in the length calculation; ④ Take the final length dimension involved in the calculation to calculate the average value S 平均值 =(S 第1次 +S 第2次 ) / 2=(15m+15m) / 2=15m; ⑤ Display each measurement result and the final result on the computer display interface;

[0110] After two length measurements, the distance meter 1 is located on the side of the forward direction of the billet 5. ① When the distance meter 1 detects that the width dimension of the billet 5 is within a reasonable range, the measurement trigger condition is started; ② According to the calculated billet moving speed v=D / (t2-t1) on the billet roller 6, the distance meter 1 keeps moving at the same speed as the billet 5 moving speed v, and the lifting device 2 moves the distance meter to the upper side of the upper surface or the lower side of the lower surface of the billet in the thickness direction of the billet; ③ The lifting device 2 starts to move the distance meter 1 upward or downward to continuously measure the width of the billet 5; ④ The first thickness dimension calculation result is compared with the billet 5 section thickness specification. If the width measurement result is within a reasonable range, the width data is saved and participates in the thickness calculation, and the thickness, width and width curve are displayed on the terminal 8; ⑤ When the distance meter 1 measures beyond the billet size, the detected width exceeds the reasonable range of the billet 5 width setting value or a numerical error occurs, the computer 8 calculates the billet thickness based on the width curve or the distance the distance meter moves; ⑥ Reverse measurement again or end the measurement to restore the starting point position.

[0111] The above examples are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A system capable of measuring the size of a casting ingot online, characterized in that: The invention comprises a distance meter moving roller (4), a moving device (3) arranged on the distance meter moving roller (4), a lifting device (2) arranged on the moving device (3), a distance meter (1) located on the lifting device (2), a computer system (8) connected to the distance meter (1), and a photoelectric trigger (7) connected to the computer system (8), wherein the number of the photoelectric triggers (7) is plural and they are installed on a billet discharge roller (6), the distance meter moving roller (4) is arranged on both sides of the billet discharge roller (6), a billet (5) that has been cut to a predetermined length is arranged on the billet discharge roller (6), and all the photoelectric triggers (7) are installed upstream of the billet (5) in the moving direction and on the lower side of the billet discharge roller (6); The lifting device (2) and the moving device (3) are both connected to a computer system (8), and the computer system (8) is also connected to a continuous casting secondary system. The two distance meters (1) are installed perpendicular to the advancing direction of the casting billet (5) and keep working synchronously with the same frequency.

2. A system for measuring the size of a casting ingot online according to claim 1, characterized in that: The moving device (3) comprises a bracket and a rotating shaft installed at the bottom of the bracket. The lifting device (2) is located on the bracket, and the rotating shaft is rotatably matched with the rangefinder moving roller (4).

3. The system for measuring the size of a casting billet online according to claim 1, characterized in that: The distance between the distance measuring device moving track (4) and the blank discharging track (6) is ≥0.2-0.5m.

4. The method for measuring the size of a casting ingot online according to claim 1, characterized in that: The number of the photoelectric triggers (7) is 2 to 40.

5. A method for measuring the size of a casting ingot online, implemented by the system according to any one of claims 1 to 4, characterized in that The following steps are involved: S1, when the first photoelectric trigger (7) detects that a cast billet (5) passes on the billet discharge roller (6) of the continuous casting operation, a detection signal is synchronously sent to the computer system (8), and the computer system (8) records the time t1, the system starts preparation work, and the distance meter (1) moves to the starting position and waits; S2, when the second photoelectric trigger (7) detects that the billet (5) passes on the billet discharge roller (6), it synchronously sends a detection signal to the computer system (8) again, and the computer system (8) records the time t2. The system starts working, and the distance meters (1) on both sides of the billet discharge roller (6) respectively measure the distances to the narrow surface of the billet (5), which are L1 and L2 respectively; S3, calculating the width W of the ingot (5) = L - L1 - L2, where L represents the horizontal distance between the two distance meters (1) perpendicular to the advancing direction of the ingot (5); S4. Determine whether to measure the thickness and length of the ingot (5) according to the inspection plan; S5. If the length of the ingot (5) is to be measured, the following steps are performed: S51, the distance meter (1) continuously measures the width data of the casting billet (5) along the moving direction of the casting billet (5); S52, when the trigger condition is met, the computer system (8) starts recording the measurement data and displays the width data and the width curve on the terminal; S53. When the termination condition is met, the computer system (8) calculates the length of the ingot (5) according to the width curve or the moving distance of the distance meter (1): S6. If the thickness of the ingot (5) is to be measured, the following steps are performed: S61, calculating the moving speed v=D / (t2-t1) of the cast billet (5) on the billet roller (6), where D is the horizontal distance between the two photoelectric triggers (7) parallel to the moving direction of the cast billet (5); S62, when the width of the ingot (5) is detected, the distance meter (1) keeps moving at the same speed as the moving speed v of the ingot (5) and the speed deviation between the two is ≤20%, and at the same time, the lifting device (2) moves the distance meter (1) to the thickness direction of the ingot (5), and the thickness direction includes the upper side of the upper surface or the lower side of the lower surface of the ingot (5); S63, the lifting device (2) is started and moves upward or downward with the distance meter (1) to continuously measure the width of the ingot (5); S64, when the trigger condition is met, the computer system (8) records the width measurement data, and displays the width measurement data and the width curve on the terminal; S65. When the termination condition is met, the computer system (8) calculates the thickness of the ingot (5) based on the width curve or the moving distance of the distance meter (1).

6. The method for measuring the size of a casting billet online according to claim 5, characterized in that: In S53, when the termination condition is met, the computer system (8) calculates the length of the ingot (5) according to the width curve or the moving distance of the distance meter (1), specifically: By continuously measuring the width data of the ingot (5), the distance meter (1) moves at a speed v 长 is greater than the moving speed v of the billet (5), the width curve of the billet (5) in the length direction can be obtained, by collecting the change points of the two width values ​​of the billet (5) at the head and tail and recording the time interval t 长 , the single length can be calculated, ① When the distance meter (1) and the billet (5) move in the same direction, the billet length S = S2-S1-v*t 长 Or S=(v 长 -v)*t 长 , S1-slab starting position, S2-slab ending position; ② When the distance meter (1) and the billet (5) move in opposite directions, the billet length S = S1-S2-v*t 长 Or S=(v 长 +v)*t 长 , S1-slab starting position, S2-slab ending position; ③ When the distance meter (1) remains stationary, the length of the billet S = v*t 长 ; Specifically in S64 and S65: By continuously and uninterruptedly measuring the width of the ingot (5), during which the moving speed of the distance meter (1) is consistent with the moving speed of the ingot (5), the lifting device (2) is started, and the lifting device (2) is moved at v 厚 The width curve of the ingot (5) in the thickness direction is measured at a speed of t, which will produce obvious width value changes at the upper and lower surfaces of the ingot (5). By collecting the change points of the two width values ​​and recording the time interval t 厚 , we can calculate the thickness T = v 厚 *t 厚 .

7. The method for measuring the size of a casting ingot online according to claim 5, characterized in that: The detection frequency of the photoelectric trigger (7) is ≥1-10 Hz, the delay time is ≤10 ms, and it is installed on the top, bottom or side of the billet discharge roller (6).

8. The method for measuring the size of a casting billet online according to claim 5, characterized in that: The rangefinder (1) is a laser rangefinder, the laser power of the laser rangefinder is ≤1mW, the rangefinder accuracy is ≤±1-2mm, and the minimum measurement distance is ≤0.2-0.5m.

9. The method for measuring the size of a casting billet online according to claim 5, characterized in that: The trigger condition is that the width value detected by the computer is within the reasonable range of the billet width setting value, and the reasonable range of the billet width setting value is 100-8000mm; the termination condition is when the distance meter (1) measures beyond the size of the billet (5), the detected width exceeds the reasonable range of the billet width setting value or a numerical error occurs; The reasonable range of the set value can be set and adjusted according to the actual situation on site. The width value measured as a trigger condition does not participate in the length and thickness calculation.

10. The method for measuring the size of a casting billet online according to claim 5, characterized in that: According to the width curve when calculating the thickness in S64, the convexity of the ingot can be calculated. The convexity of the ingot includes the wide surface bulging amount and the narrow surface bulging amount corresponding to the wide surface bulging defect and the narrow surface bulging defect. Wide surface bulging amount = Tmax-Tmin, Tmax: maximum thickness of slab, Tmin: minimum thickness of slab; Narrow side bulging amount = Wmax-Wmin, Wmax: maximum slab width, Wmin: minimum slab width.

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