A method and device for detecting the tension state between racks

Abstract

An embodiment of the present invention provides a method and device for detecting the tension state between stands. The method includes: obtaining the steel-containing time period and speed curve of each stand; generating the converted steel-containing duration of each stand according to the steel-containing time period and speed curve; obtaining the converted time difference according to the first converted steel-containing duration of the current stand and the second converted steel-containing duration of the downstream stand of the current stand; determining the tension between the current stand and the downstream stand of the current stand according to the converted time difference to obtain the tension state, and determining the tension between stands through the principle of equal second flow rate, improving the detection accuracy, thereby ensuring the product quality.

Description

Technical Field

[0001] The present invention relates to the field of automation technology, and in particular, to a method and device for detecting the tension state between stands. Background Art

[0002] The bar and wire rod production line is a fully continuous rolling production line, generally including a rough rolling area, an intermediate rolling area, and a finish rolling area. For the rough rolling area and the intermediate rolling area, micro-tension rolling is required to prevent steel piling and cause production accidents. Therefore, operators generally actively adopt drawing rolling, but over-drawing will cause out-of-tolerance dimensions and reduce product quality. Therefore, it is necessary to detect and judge the tension state in a timely manner. In the related art, tension detection is usually carried out by current judgment method, observation method, loop change judgment method, and dimension judgment method. However, when the temperature of the billet changes during tapping, or there are heating furnace water beam marks on the billet itself, and the material of the steel is uneven, the current judgment method cannot effectively judge whether the current change is caused by tension; the observation method is a manual judgment of tension, which is difficult to quantify and can only be found when a large tension is generated; the loop change judgment method judges the tension through the loop located in the finish rolling area. When the rolled piece has not reached the loop position, or the loop adjustment has not reached a steady state, and the loop adjustment has been saturated, it is difficult to accurately detect the tension; in the dimension judgment method, since it is impossible to determine whether it is affected by temperature, it is difficult to locate the specific stand and it is difficult to quantify. To sum up, the data relied on by the methods provided in the related art are limited, and there are problems of inaccurate tension detection, thus unable to guarantee product quality. Summary of the Invention

[0003] An object of the present invention is to provide a method for detecting the tension state between stands, which determines the tension between stands through the principle of equal mass flow per second, improves the detection accuracy, and thus guarantees product quality. Another object of the present invention is to provide a device for detecting the tension state between stands. Still another object of the present invention is to provide a computer-readable medium. Yet another object of the present invention is to provide a computer device.

[0004] To achieve the above objects, on the one hand, the present invention discloses a method for detecting the tension state between stands, including:

[0005] Obtaining the steel-containing time period and speed curve of each stand;

[0006] Generating the converted steel-containing duration of each stand according to the steel-containing time period and speed curve;

[0007] Obtaining a converted time difference according to the first converted steel-containing duration of the current stand and the second converted steel-containing duration of the downstream stand of the current stand;

[0008] Judging the tension between the current stand and the downstream stand of the current stand according to the converted time difference to obtain the tension state.

[0009] Preferably, obtaining the steel-containing periods and speed curves of each stand includes:

[0010] Obtaining the first steel-containing period and the first speed curve of the current stand;

[0011] Obtaining the second steel-containing period and the second speed curve of the downstream stand of the current stand.

[0012] Preferably, the first speed curve includes a first set speed curve and a first actual speed curve, and the second speed curve includes a second set speed curve and a second actual speed curve;

[0013] Generating the converted steel-containing duration of each stand according to the steel-containing period and the speed curve, including:

[0014] Through the first set speed curve, determining the speed corresponding to the speed stable section in the first set speed curve as the first speed reference value;

[0015] Generating the first converted steel-containing duration of the current stand according to the first actual speed curve, the first speed reference value and the first steel-containing period;

[0016] Through the second set speed curve, determining the speed corresponding to the speed stable section in the second set speed curve as the second speed reference value;

[0017] Generating the second converted steel-containing duration of the downstream stand of the current stand according to the second actual speed curve, the second speed reference value and the second steel-containing period.

[0018] Preferably, generating the first converted steel-containing duration of the current stand according to the first actual speed curve, the first speed reference value and the first steel-containing period includes:

[0019] Performing integral calculation on the first actual speed curve during the first steel-containing period to obtain the first converted length;

[0020] Generating the first converted steel-containing duration of the current stand according to the first converted length and the first speed reference value.

[0021] Preferably, generating the second converted steel-containing duration of the downstream stand of the current stand according to the second actual speed curve, the second speed reference value and the second steel-containing period includes:

[0022] Performing integral calculation on the second actual speed curve during the second steel-containing period to obtain the second converted length;

[0023] Generating the second converted steel-containing duration of the downstream stand of the current stand according to the second converted length and the second speed reference value.

[0024] Preferably, according to the converted time difference, the tension between the current rack and the downstream rack of the current rack is determined to obtain the tension state, including:

[0025] If the converted time difference is greater than zero, it is determined that the tension state between the current rack and the downstream rack of the current rack is steel piling;

[0026] If the converted time difference is less than zero, it is determined that the tension state between the current rack and the downstream rack of the current rack is steel drawing.

[0027] Preferably, after determining the tension between the current rack and the downstream rack of the current rack according to the converted time difference to obtain the tension state, it further includes:

[0028] According to the converted steel-containing duration, the converted time difference is normalized to obtain a per-unit value;

[0029] Through the set tension level mapping relationship, the corresponding tension level is obtained according to the per-unit value.

[0030] Preferably, the method further includes:

[0031] Obtain the standard torque curves of multiple standard products;

[0032] Through multiple standard torque curves, the time difference parameter is calibrated according to the standard time difference to obtain a time difference correction parameter;

[0033] According to the time difference correction parameter, the converted time difference is updated to obtain the updated converted time difference.

[0034] The present invention also discloses a device for detecting the tension state between racks, including:

[0035] A first acquisition unit for acquiring the steel-containing time period and speed curve of each rack;

[0036] A conversion unit for generating the converted steel-containing duration of each rack according to the steel-containing time period and speed curve;

[0037] A time difference calculation unit for obtaining the converted time difference according to the first converted steel-containing duration of the current rack and the second converted steel-containing duration of the downstream rack of the current rack;

[0038] A tension determination unit for determining the tension between the current rack and the downstream rack of the current rack according to the converted time difference to obtain the tension state.

[0039] The present invention also discloses a computer-readable medium, on which a computer program is stored, and when the program is executed by a processor, the above-mentioned method is implemented.

[0040] The present invention also discloses a computer device, including a memory and a processor. The memory is used to store information including program instructions, and the processor is used to control the execution of the program instructions. When the processor executes the program, the above-mentioned method is implemented.

[0041] The present invention also discloses a computer program product, including a computer program / instructions. When the computer program / instructions are executed by a processor, the above-mentioned method is implemented.

[0042] The present invention obtains the steel-containing time period and speed curve of each rack; generates the converted steel-containing duration of each rack according to the steel-containing time period and speed curve; obtains the conversion time difference according to the first converted steel-containing duration of the current rack and the second converted steel-containing duration of the downstream rack of the current rack; determines the tension between the current rack and the downstream rack of the current rack according to the conversion time difference to obtain the tension state, and determines the tension between racks through the principle of equal second flow rate, avoiding the influence of the original detection factors, improving the detection accuracy, and thus ensuring the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0044] Figure 1 It is a schematic diagram of equal second flow rate between racks provided by an embodiment of the present invention;

[0045] Figure 2 It is a schematic diagram of each rack containing steel separately and without the state of continuous steel provided by an embodiment of the present invention;

[0046] Figure 3 It is a flowchart of a method for detecting the tension state between racks provided by an embodiment of the present invention;

[0047] Figure 4 It is a flowchart of another method for detecting the tension state between racks provided by an embodiment of the present invention;

[0048] Figure 5 It is a schematic structural diagram of a device for detecting the tension state between racks provided by an embodiment of the present invention;

[0049] Figure 6 It is a schematic structural diagram of a computer device provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0050] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0051] To facilitate the understanding of the technical solutions provided in this application, the relevant content of the technical solutions in this application will be described first. Tension is generated between the stands. The phenomenon is the occurrence of stockpiling and pulling of steel, but the essence is the unequal second flow rates. Figure 1 The following is a schematic diagram showing equal second flow rates between stands provided in an embodiment of the present invention. As Figure 1 shown, the nth stand and the (n + 1)th stand are in a continuous steel state. The outlet speed of the nth stand is V n , and the outlet speed of the (n + 1)th stand is V n+1 . The principle of equal second flow rates means that the volume of metal passing through this stand and the downstream stand per unit time is equal. The formula is expressed as:

[0052] S n ×V n =S n+1 ×V n+1。

[0053] Among them, S n is the equivalent cross-sectional area of the nth stand, V n is the outlet speed of the nth stand, S n+1 is the equivalent cross-sectional area of the (n + 1)th stand, and V n+1 is the outlet speed of the (n + 1)th stand.

[0054] Since the volume of the steel billet is fixed, on the premise of equal second flow rates, the time taken to pass through this stand (the nth stand) and the downstream stand (the (n + 1)th stand) should be equal. If the time is not equal, it proves that there is tension, resulting in stockpiling and pulling of steel. However, during actual production, the cascade speed between the stands is dynamically adjusted, especially when there is no continuous steel between the stands, which will lead to unequal times passing through each stand, resulting in inaccurate judgment. Therefore, it is necessary to convert the steel-containing time of each stand according to the dynamic speed and the set speed. Figure 2 The following is a schematic diagram showing each stand containing steel separately and without a continuous steel state provided in an embodiment of the present invention. The method for detecting the tension state between the stands provided by the present invention can accurately judge the tension state in a timely manner, so as to achieve the purpose of ensuring both micro-tension rolling and product quality by adjusting the cascade speed between the rolling mills.

[0055] Taking the inter-stand tension state detection device as an example of the execution subject, the implementation process of the inter-stand tension state detection method provided by the embodiments of the present invention will be described. It can be understood that the execution subject of the inter-stand tension state detection method provided by the embodiments of the present invention includes, but is not limited to, the inter-stand tension state detection device.

[0056] Figure 3 It is a flowchart of an inter-stand tension state detection method provided by an embodiment of the present invention. As Figure 3 shown, the method includes:

[0057] Step 101, obtain the steel-containing time period and speed curve of each stand.

[0058] Step 102, generate the converted steel-containing duration of each stand according to the steel-containing time period and speed curve.

[0059] Step 103, obtain the conversion time difference according to the first converted steel-containing duration of the current stand and the second converted steel-containing duration of the downstream stand of the current stand.

[0060] Step 104, determine the tension between the current stand and the downstream stand of the current stand according to the conversion time difference, and obtain the tension state.

[0061] It should be noted that in the technical solution of this application, the acquisition, storage, use, processing, etc. of data all comply with the relevant regulations of national laws and regulations. The user information in the embodiments of this application is obtained through legal and compliant channels, and the acquisition, storage, use, processing, etc. of user information have obtained the authorization and consent of the customers.

[0062] In the technical solution provided by the embodiments of the present invention, the steel-containing time period and speed curve of each stand are obtained; the converted steel-containing duration of each stand is generated according to the steel-containing time period and speed curve; the conversion time difference is obtained according to the first converted steel-containing duration of the current stand and the second converted steel-containing duration of the downstream stand of the current stand; the tension between the current stand and the downstream stand of the current stand is determined according to the conversion time difference, and the tension state is obtained. The inter-stand tension is determined through the principle of equal mass flow per second, improving the detection accuracy, and thus ensuring the product quality.

[0063] Figure 4 It is a flowchart of another inter-stand tension state detection method provided by an embodiment of the present invention. As Figure 4 shown, the method includes:

[0064] Step 201, obtain the steel-containing time period and speed curve of each stand.

[0065] In the embodiments of the present invention, each step is executed by the inter-stand tension state detection device.

[0066] Specifically, taking the current stand (the nth stand) and the downstream stand of the current stand (the n+1th stand) as examples, obtain the first steel-containing period and the first speed curve of the current stand; obtain the second steel-containing period and the second speed curve of the downstream stand of the current stand.

[0067] In the embodiments of the present invention, the steel-containing period can be obtained by measuring torque, current load curves, etc. The duration of being higher than the threshold value is the steel-containing period. Among them, the threshold value of torque or current can be calculated by the rolling force formula and the rolling torque formula, or can be set according to empirical values, and the error is within an acceptable range. As an alternative, the torque threshold value is set to 8% according to experience, and when the torque is higher than 8%, it is regarded as containing steel.

[0068] In the embodiments of the present invention, the first speed curve includes a first set speed curve and a first actual speed curve. The first set speed curve is the speed change curve of the current stand during the rolling process under ideal conditions, and the first actual speed curve is the speed change curve of the current stand during the actual production rolling process.

[0069] In the embodiments of the present invention, the second speed curve includes a second set speed curve and a second actual speed curve. The second set speed curve is the speed change curve of the downstream stand of the current stand during the rolling process under ideal conditions, and the second actual speed curve is the speed change curve of the downstream stand of the current stand during the actual production rolling process.

[0070] Step 202: Determine, through the first set speed curve, the speed corresponding to the speed stable section in the first set speed curve as the first speed reference value.

[0071] In the embodiments of the present invention, obtain the speed stable section of the first set speed curve during the first steel-containing period, indicating that during this steel-containing period, the speed of the current stand changes little and is stable. Determine the speed corresponding to the speed stable section as the first speed reference value VS n 。

[0072] For example: The first set speed curve reaches the speed stable section after 1 s of containing steel, and the speed corresponding to the speed stable section is 851 rpm. Then the first speed reference value VS1 = 851 rpm.

[0073] It should be noted that since the dimension of speed will be eliminated when finally converted to the steel-containing duration, the speed in the present invention can be in revolutions per minute or linear speed, and the same speed variable can be used for the current stand and the downstream stand of the current stand.

[0074] Step 203: Generate the first converted steel-containing duration of the current stand according to the first actual speed curve, the first speed reference value, and the first steel-containing period.

[0075] Specifically, perform integral calculation on the first actual speed curve within the first steel-containing period to obtain the first converted length L n ; through T n = L n / VS n , generate the first converted steel-containing duration of the current stand according to the first converted length and the first speed reference value, where T n is the first converted steel-containing duration, L n is the first converted length, and VS n is the first speed reference value.

[0076] For example: The first steel-containing period TA1 of the current stand = 40.22 s, the first converted length L1 obtained by integral calculation = 570.49 r, and the first speed reference value VS1 = 851 rpm. Therefore, the calculated first converted steel-containing duration T1 = 60×570.49 / 851 = 40.22 s.

[0077] Step 204: Determine the speed corresponding to the speed stable section in the second set speed curve as the second speed reference value through the second set speed curve.

[0078] In the embodiment of the present invention, obtaining the speed stable section of the second set speed curve in the second steel-containing period indicates that the speed of the current stand changes little and is stable during this steel-containing period. Determine the speed corresponding to the speed stable section as the second speed reference value VS n+1 .

[0079] For example: The second set speed curve reaches the speed stable section after 1 s of steel-containing, and the speed corresponding to the speed stable section is 865 rpm. Then the second speed reference value VS2 = 865 rpm.

[0080] It should be noted that since the dimension of speed will be eliminated when finally converted to the steel-containing duration, the speed in the present invention can be in revolutions per minute or linear speed, and the same speed variable can be used for the current stand and the downstream stand of the current stand.

[0081] Step 205: Generate the second converted steel-containing duration of the downstream stand of the current stand according to the second actual speed curve, the second speed reference value, and the second steel-containing period.

[0082] Specifically, perform integral calculation on the second actual speed curve within the second steel-containing period to obtain the second converted length L n+1 ; through T n+1 = L n+1 / VS n+1 , generate the second converted steel-containing duration of the downstream stand of the current stand according to the second converted length and the second speed reference value, where T n+1 is the second converted steel-containing duration, Ln+1 is the second reduced length, VS n+1 is the second speed reference value.

[0083] For example: the second steel-containing period TA2 of the downstream stand of the current stand is 39.94 s, the second reduced length L2 obtained by integral calculation is 580.13 r, and the second speed reference value VS2 is 865 rpm. Therefore, the calculated second reduced steel-containing duration T2 = 60×580.13 / 865 = 40.24 s.

[0084] Step 206: Obtain a reduced time difference based on the first reduced steel-containing duration of the current stand and the second reduced steel-containing duration of the downstream stand of the current stand.

[0085] Specifically, the difference between the first reduced steel-containing duration and the second reduced steel-containing duration is determined as the reduced time difference. For example: the first reduced steel-containing duration T1 = 40.22 s, the second reduced steel-containing duration T2 = 40.24 s, then the reduced time difference DT1 = 40.24 - 40.22 = 0.02 s.

[0086] Furthermore, in the actual production process, there are some errors caused by fixed parameters such as electricity, control, and process. To further eliminate the errors, the embodiments of the present invention calibrate correction parameters and superimpose correction descriptions on the calculated reduced time difference to ensure more accurate judgment of the tension state.

[0087] Specifically, obtain the standard torque curves of multiple standard products. The standard products are selected according to the uniformity of the finished product and other tension judgment methods. Among them, the uniformity of the finished product size can be measured by a diameter gauge, and whether the uniformity meets the requirements can be obtained by comparing the measurement data with the process standard; the standard torque curve is the torque curve when there is no stacking or pulling at the nth stand during rolling and the finished product size is uniform. Through multiple standard torque curves, calibrate the time difference parameters according to the standard time difference to obtain the time difference correction parameter, that is: calculate the corresponding standard time difference DT n = T n+1 - T n for each standard torque curve. If there are m standard torque curves, then m DTs are obtained n ; calibrate the time difference parameters according to the m standard time differences DT n to obtain the time difference correction parameter t n , and t n is calibrated as t n = -(DT n1 + DT n2 + …… DT nm ) / m. Update the reduced time difference according to the time difference correction parameter to obtain the updated reduced time difference DT' n = DT n + t n, that is: DT’ n = T n+1 - T n + t n .

[0088] For example: select the standard time difference DT of 5 steels without piling n1 = 0.05, DT n2 = 0.04, DT n3 = 0.03, DT n4 = 0.05, DT n5 = 0.02. After calibrating the time difference parameter, the time difference correction parameter t n = -(0.05 + 0.04 + 0.03 + 0.03 + 0.02) / 5 = -0.034s, then the corrected converted time difference DT’1 = 0.02 - 0.034 = -0.014s.

[0089] Step 207: Determine the tension between the current stand and the downstream stand of the current stand according to the converted time difference, and obtain the tension state.

[0090] Specifically, if the converted time difference is greater than zero (DT n > 0), it is determined that the tension state between the current stand and the downstream stand of the current stand is piling, and the greater the value of the converted time difference, the more serious the piling; if the converted time difference is less than zero (DT n < 0), it is determined that the tension state between the current stand and the downstream stand of the current stand is drawing, and the smaller the value of the converted time difference (the larger the absolute value), the more serious the drawing.

[0091] It should be noted that if the converted time difference is equal to zero (DT n = 0), it can be considered that the tension state between the current stand and the downstream stand of the current stand is no piling or drawing.

[0092] For example: the converted time difference before update is DT1 = 0.02s, and the tension state is piling; the time difference correction parameter t n = -0.034s, then the converted time difference after update is DT’1 = -0.014s, and the tension state is drawing. It can be seen that the piling and drawing relationship before and after correction may be opposite.

[0093] In order to further improve the detection accuracy of the tension state, the tension state can be further refined. After step 207, it further includes:

[0094] Step 208: Perform a per-unit conversion on the converted time difference according to the converted steel-containing duration to obtain a per-unit value.

[0095] In the embodiment of the present invention, using the converted steel-containing duration T1 of the first stand, the converted time difference DT nPerform per-unit conversion to quantitatively describe the stacking and pulling relationship.

[0096] Specifically, through P n = DT n / T1, perform per-unit conversion on the conversion time difference DT n to obtain the per-unit value. Among them, P n is the per-unit value, DT n is the conversion time difference, and T1 is the conversion steel-containing time of the first stand.

[0097] It should be noted that if the conversion time difference is updated, the conversion time difference DT n in the above formula can be replaced with the updated conversion time difference DT’1, that is: perform per-unit conversion on the updated conversion time difference to obtain the per-unit value.

[0098] For example: the conversion time difference DT1 = 0.02s, and the conversion steel-containing time of the first stand T1 = 40.22s. Then the per-unit value P1 obtained after per-unit conversion is P1 = 0.02 / 40.22 = 0.05%.

[0099] Step 209: Through the set tension level mapping relationship, obtain the corresponding tension level according to the per-unit value.

[0100] In the embodiment of the present invention, the tension level mapping relationship can be set according to actual needs. The tension level mapping relationship includes the tension levels corresponding to different per-unit value ranges. As an optional solution, the tension level mapping relationship is set as follows: when the absolute value of the per-unit value Pn is less than 0.25%, the corresponding tension level is no stacking and pulling relationship; when the absolute value of the per-unit value Pn is greater than or equal to 0.25% and less than 1%, the corresponding tension level is slight stacking and pulling; when the absolute value of the per-unit value Pn is greater than or equal to 1% and less than 2.5%, the corresponding tension level is stacking and pulling; when the absolute value of the per-unit value Pn is greater than or equal to 2.5%, the corresponding tension level is severe stacking and pulling. It should be noted that the grading parameters of the above tension level mapping relationship are only for reference, and can be flexibly adjusted according to actual needs in actual use. The embodiment of the present invention does not limit this.

[0101] In the embodiment of the present invention, since the stacking and pulling relationship before and after correction may be opposite, a grading setting is performed on the tension stacking and pulling relationship to reduce the disturbance near the zero point. Further, the graded tension level can be fed back to the control system to correct the cascade speed.

[0102] For example: the per-unit value P1 obtained after per-unit conversion is P1 = 0.05%. Considering various errors in the calculation, in actual application, P1 can be graded. Taking the above tension level mapping relationship as an example, the absolute value of P1 is less than 0.25%, so there is no need to correct the cascade speed or perform slight pulling adjustment.

[0103] It should be noted that if fine-drawing adjustment is required, the cascading speed can be adjusted by reducing the speed of the first stand, thereby adjusting the piling and drawing relationship.

[0104] The present invention proposes a method for judging the inter-stand tension based on the rolling duration. By the principle of equal mass flow per second, the tension state is judged, reducing the problem of inaccurate judgment caused by interference of other factors, and can assist in improving product quality and production stability.

[0105] In the technical solution of the inter-stand tension state detection method provided by the embodiment of the present invention, the steel-containing time period and speed curve of each stand are obtained; according to the steel-containing time period and speed curve, the converted steel-containing duration of each stand is generated; according to the first converted steel-containing duration of the current stand and the second converted steel-containing duration of the downstream stand of the current stand, the converted time difference is obtained; according to the converted time difference, the tension between the current stand and the downstream stand of the current stand is judged to obtain the tension state, and the inter-stand tension is determined by the principle of equal mass flow per second, improving the detection accuracy, thereby ensuring product quality.

[0106] Figure 5 It is a schematic structural diagram of an inter-stand tension state detection device provided by an embodiment of the present invention. This device is used to execute the above-mentioned inter-stand tension state detection method, as Figure 5 shown, the device includes: a first acquisition unit 11, a conversion unit 12, a time difference calculation unit 13, and a tension determination unit 14.

[0107] The first acquisition unit 11 is used to acquire the steel-containing time period and speed curve of each stand.

[0108] The conversion unit 12 is used to generate the converted steel-containing duration of each stand according to the steel-containing time period and speed curve.

[0109] The time difference calculation unit 13 is used to obtain the converted time difference according to the first converted steel-containing duration of the current stand and the second converted steel-containing duration of the downstream stand of the current stand.

[0110] The tension determination unit 14 is used to judge the tension between the current stand and the downstream stand of the current stand according to the converted time difference to obtain the tension state.

[0111] In the embodiment of the present invention, the first acquisition unit 11 is specifically used to acquire the first steel-containing time period and the first speed curve of the current stand; acquire the second steel-containing time period and the second speed curve of the downstream stand of the current stand.

[0112] In an embodiment of the present invention, the first speed curve includes a first set speed curve and a first actual speed curve, and the second speed curve includes a second set speed curve and a second actual speed curve; the conversion unit 12 is specifically configured to determine, through the first set speed curve, the speed corresponding to the speed stable section in the first set speed curve as the first speed reference value; generate the first converted steel-containing duration of the current stand according to the first actual speed curve, the first speed reference value, and the first steel-containing period; determine, through the second set speed curve, the speed corresponding to the speed stable section in the second set speed curve as the second speed reference value; generate the second converted steel-containing duration of the downstream stand of the current stand according to the second actual speed curve, the second speed reference value, and the second steel-containing period.

[0113] In an embodiment of the present invention, the conversion unit 12 is specifically configured to perform an integral calculation on the first actual speed curve during the first steel-containing period to obtain a first converted length; generate the first converted steel-containing duration of the current stand according to the first converted length and the first speed reference value.

[0114] In an embodiment of the present invention, the conversion unit 12 is specifically configured to perform an integral calculation on the second actual speed curve during the second steel-containing period to obtain a second converted length; generate the second converted steel-containing duration of the downstream stand of the current stand according to the second converted length and the second speed reference value.

[0115] In an embodiment of the present invention, the tension determination unit 14 is specifically configured to determine that the tension state between the current stand and the downstream stand of the current stand is steel piling if the conversion time difference is greater than zero; determine that the tension state between the current stand and the downstream stand of the current stand is steel drawing if the conversion time difference is less than zero.

[0116] In an embodiment of the present invention, the device further includes: a per-unit value unit 15 and a mapping unit 16.

[0117] The per-unit value unit 15 is configured to perform a per-unit value conversion on the conversion time difference according to the converted steel-containing duration to obtain a per-unit value.

[0118] The mapping unit 16 is configured to obtain a corresponding tension level according to the per-unit value through the set tension level mapping relationship.

[0119] In an embodiment of the present invention, the device further includes: a second acquisition unit 17, a parameter calibration unit 18, and a correction unit 19.

[0120] The second acquisition unit 17 is configured to acquire standard torque curves of multiple standard products.

[0121] The parameter calibration unit 18 is configured to perform time difference parameter calibration according to the standard time difference through multiple standard torque curves to obtain a time difference correction parameter.

[0122] The correction unit 19 is used to update the converted time difference according to the time difference correction parameter to obtain the updated converted time difference.

[0123] In the solution of the embodiment of the present invention, the steel-containing time period and speed curve of each stand are obtained; according to the steel-containing time period and speed curve, the converted steel-containing duration of each stand is generated; according to the first converted steel-containing duration of the current stand and the second converted steel-containing duration of the downstream stand of the current stand, the converted time difference is obtained; according to the converted time difference, the tension between the current stand and the downstream stand of the current stand is determined to obtain the tension state, and the tension between stands is determined by the principle of equal second flow rate, improving the detection accuracy, thereby ensuring the product quality.

[0124] The system, device, module or unit described in the above embodiments can be specifically implemented by a computer chip or an entity, or by a product with a certain function. A typical implementation device is a computer device. Specifically, the computer device can be, for example, a personal computer, a laptop computer, a cellular phone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or any combination of these devices.

[0125] The embodiment of the present invention provides a computer device, including a memory and a processor. The memory is used to store information including program instructions, and the processor is used to control the execution of the program instructions. When the program instructions are loaded and executed by the processor, the steps of the above embodiments of the method for detecting the tension state between stands are implemented. For specific descriptions, reference can be made to the embodiments of the method for detecting the tension state between stands.

[0126] Next, refer to Figure 6 , which shows a schematic structural diagram of a computer device 600 suitable for implementing the embodiments of the present application.

[0127] As Figure 6 shown, the computer device 600 includes a central processing unit (CPU) 601, which can perform various appropriate operations and processes according to the program stored in the read-only memory (ROM) 602 or the program loaded from the storage section 608 into the random access memory (RAM) 603. In the RAM 603, various programs and data required for the operation of the computer device 600 are also stored. The CPU 601, ROM 602, and RAM 603 are connected to each other through a bus 604. The input / output (I / O) interface 605 is also connected to the bus 604.

[0128] The following components are connected to the I / O interface 605: an input section 606 including a keyboard, a mouse, etc.; an output section 607 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc. and a speaker, etc.; a storage section 608 including a hard disk, etc.; and a communication section 609 including a network interface card such as a LAN card, a modem, etc. The communication section 609 performs communication processing via a network such as the Internet. A drive 610 is also connected to the I / O interface 605 as required. A removable medium 611 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc. is installed on the drive 610 as required so that a computer program read from it can be installed in the storage section 608 as required.

[0129] Specifically, according to an embodiment of the present invention, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, an embodiment of the present invention includes a computer program product, which includes a computer program tangibly embodied on a machine-readable medium, and the computer program includes program code for performing the methods shown in the flowcharts In such an embodiment, the computer program can be downloaded and installed from a network through the communication section 609, and / or installed from the removable medium 611.

[0130] Computer-readable media includes both permanent and non-permanent, removable and non-removable media and can be implemented by any method or technology for storing information. The information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, compact disc read-only memory (CD-ROM), digital versatile discs (DVD) or other optical storage, magnetic cassettes, magnetic tape disk storage or other magnetic storage devices, or any other non-transitory medium that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include transitory computer-readable media such as modulated data signals and carrier waves.

[0131] For convenience of description, the above-described apparatus is described by functionally dividing it into various units. Of course, when implementing the present application, the functions of the various units can be implemented in one or more pieces of software and / or hardware.

[0132] The present invention is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to embodiments of the present invention. It should be understood that each flow and / or block in the flowchart and / or block diagram, and the combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices produce means for implementing the functions specified in one flow Figure 1 one flow or multiple flows and / or blocks Figure 1 or in multiple blocks.

[0133] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory produce a manufactured article including instruction means that implement the functions specified in one flow Figure 1 one flow or multiple flows and / or blocks Figure 1 or in multiple blocks.

[0134] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process, and thus the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one flow Figure 1 one flow or multiple flows and / or blocks Figure 1 or in multiple blocks.

[0135] It should also be noted that the term "comprising", "including", or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, commodity, or device including a series of elements not only includes those elements but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, commodity, or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, commodity, or device including the said element.

[0136] In the technical solution of this application, the acquisition, storage, use, processing, etc. of data all comply with the relevant regulations of national laws and regulations.

[0137] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0138] The present application can be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. The present application can also be practiced in a distributed computing environment where tasks are performed by remote processing devices connected through a communication network. In a distributed computing environment, program modules can be located in local and remote computer storage media including storage devices.

[0139] Each embodiment in this specification is described in a progressive manner. For the same or similar parts among the embodiments, reference can be made to each other. The key point of each embodiment is to illustrate the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can refer to the description of the method embodiment.

[0140] The above description is only for the embodiments of the present application and is not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. A method for detecting the tension state between racks, characterized in that, The method includes: Obtaining the steel-containing time period and speed curve of each rack; Generating the converted steel-containing duration of each rack according to the steel-containing time period and speed curve; Obtaining a conversion time difference according to the first converted steel-containing duration of the current rack and the second converted steel-containing duration of the downstream rack of the current rack; Determining the tension between the current rack and the downstream rack of the current rack according to the conversion time difference to obtain a tension state.

2. The method for detecting the inter-rack tension state according to claim 1, characterized in that The obtaining the steel-containing time period and speed curve of each rack includes: Obtaining the first steel-containing time period and the first speed curve of the current rack; Obtaining the second steel-containing time period and the second speed curve of the downstream rack of the current rack.

3. The method for detecting the tension state between racks according to claim 2, wherein, The first speed curve includes a first set speed curve and a first actual speed curve, and the second speed curve includes a second set speed curve and a second actual speed curve; The generating the converted steel-containing duration of each rack according to the steel-containing time period and speed curve includes: Determining, through the first set speed curve, the speed corresponding to the stable speed section in the first set speed curve as the first speed reference value; Generating the first converted steel-containing duration of the current rack according to the first actual speed curve, the first speed reference value, and the first steel-containing time period; Determining, through the second set speed curve, the speed corresponding to the stable speed section in the second set speed curve as the second speed reference value; Generating the second converted steel-containing duration of the downstream rack of the current rack according to the second actual speed curve, the second speed reference value, and the second steel-containing time period.

4. The method for detecting the inter-rack tension state according to claim 3, wherein The generating the first converted steel-containing duration of the current rack according to the first actual speed curve, the first speed reference value, and the first steel-containing time period includes: Performing integral calculation on the first actual speed curve during the first steel-containing time period to obtain a first converted length; Generating the first converted steel-containing duration of the current rack according to the first converted length and the first speed reference value.

5. The method for detecting the tension state between racks according to claim 3, characterized in that, The generating the second converted steel-containing duration of the downstream rack of the current rack according to the second actual speed curve, the second speed reference value, and the second steel-containing time period includes: Performing integral calculation on the second actual speed curve during the second steel-containing time period to obtain a second converted length; Generating the second converted steel-containing duration of the downstream rack of the current rack according to the second converted length and the second speed reference value.

6. The method for detecting the tension state between racks according to claim 1, wherein The determining the tension between the current rack and the downstream rack of the current rack according to the conversion time difference to obtain a tension state includes: If the conversion time difference is greater than zero, determining that the tension state between the current rack and the downstream rack of the current rack is steel piling; If the conversion time difference is less than zero, determining that the tension state between the current rack and the downstream rack of the current rack is steel drawing.

7. The method for detecting the inter-rack tension state according to claim 1, wherein After the determining the tension between the current rack and the downstream rack of the current rack according to the conversion time difference to obtain a tension state, it further includes: Performing per-unit conversion on the conversion time difference according to the converted steel-containing duration to obtain a per-unit value; Obtaining a corresponding tension level according to the per-unit value through a set tension level mapping relationship.

8. The method for detecting the inter-rack tension state according to claim 1, wherein The method further includes: Obtain the standard torque curves of multiple standard products; Based on the multiple standard torque curves, calibrate the time difference parameters according to the standard time difference to obtain the time difference correction parameters; Update the converted time difference according to the time difference correction parameters to obtain the updated converted time difference.

9. A tension state detection device between racks, characterized in that, The device includes: A first acquisition unit for acquiring the steel-containing time period and speed curve of each rack; A conversion unit for generating the converted steel-containing duration of each rack according to the steel-containing time period and speed curve; A time difference calculation unit for obtaining the converted time difference according to the first converted steel-containing duration of the current rack and the second converted steel-containing duration of the downstream rack of the current rack; A tension determination unit for determining the tension between the current rack and the downstream rack of the current rack according to the converted time difference to obtain the tension state.

10. A computer-readable medium having a computer program stored thereon, characterized in that, When the program is executed by a processor, it implements the inter-rack tension state detection method according to any one of claims 1 to 8.

11. A computer device, comprising a memory and a processor, the memory being used to store information including program instructions, the processor being used to control the execution of the program instructions, characterized in that, When the program instructions are loaded and executed by a processor, it implements the inter-rack tension state detection method according to any one of claims 1 to 8.

12. A computer program product, comprising a computer program / instructions, characterized in that, When the computer program / instructions are executed by a processor, it implements the inter-rack tension state detection method according to any one of claims 1 to 8.

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