A full-automatic iron tapping state tracking method based on a track scale

Abstract

The application discloses a kind of full-automatic iron discharge state tracking methods based on track scale, obtain the weight and time data of current iron discharge position by track scale, calculate the iron speed in real time by the weight and time data of continuous period;Iron discharge start is judged by iron discharge speed, iron discharge start speed threshold, iron discharge start count and iron discharge start count threshold, and the tare weight of track scale is recorded;Iron discharge end is judged by iron discharge speed, iron discharge end speed threshold, iron discharge end count and iron discharge end count threshold, and the gross weight of track scale is recorded;Finally, the weight of this iron discharge is calculated by tare weight and gross weight.This method has the following beneficial improvements compared with existing technology: only track scale is needed to realize the real-time tracking of iron discharge state, with low cost;Weight calculation is accurate, and the problem of vehicle rapid departure can be solved;Real-time is higher, and iron discharge can be identified within 10 seconds at the fastest.

Description

Technical Field

[0001] This invention relates to the field of metallurgy, and in particular to a fully automated method for tracking the iron tapping status based on a track scale. Background Technology

[0002] Fully automated molten iron tracking is the foundation for unmanned iron and steel transportation technology. The real-time performance and accuracy of molten iron tracking directly affect the effectiveness of unmanned scheduling in iron and steel transportation. Tracking the current molten iron status is an indispensable part of future iron and steel interface technology.

[0003] Currently, most blast furnaces install rail scales at the tapping position to determine the current weight of the molten iron ladle. Rail scales are arguably the most common sensor equipment used in blast furnaces. If fully automated tracking of the tapping status could be achieved solely based on rail scales, it would greatly advance the automation of iron and steel transportation. Summary of the Invention

[0004] In view of the above-mentioned deficiencies of the prior art, the present invention provides a fully automatic iron tapping status tracking method based on a track scale, the technical solution of which is as follows:

[0005] A fully automated iron tapping status tracking method based on a track scale includes:

[0006] Step S1: Read the weight reading W of track scale weight data point X for the current cycle. X With time data T X ;

[0007] Step S2: Find the weight reading W of the track balance weight data point Y in the previous A cycles. Y With time data T Y ;

[0008] Step S3: According to W X W Y T X T Y Calculate the iron tapping speed V; then, execute the start of iron tapping judgment in step S4-1 and the end of iron tapping judgment in step S4-2;

[0009] Step S4-1: Compare V with the iron tapping start speed threshold V o and maximum iron tapping speed V max When V o <V<V max At that time, the counting of C begins when the iron is tapped. o Increase by 1; proceed to step S5; otherwise, start counting C when tapping iron. o Set to 0, then return to step S1;

[0010] Step S5: Compare the iron content and start counting C oAnd the threshold C for starting to count iron tapping o_num When C o >C o_num When the time is right, mark it as the start of tapping and record the tare weight of the tapped iron, then return to step S1; otherwise, return directly to step S1.

[0011] Step S4-2: Compare V with the iron tapping end speed threshold V c When V < V c At that time, the iron tapping ended counting C c Increment by 1, proceed to step S6; otherwise, stop the iron tapping count C. c Set to 0, then return to step S1;

[0012] Step S6: Compare the iron output end count C c And the iron tapping end counting threshold C c_num When C c >C c_num When the iron tapping is complete, record the gross weight of the tapped iron and return to step S1; otherwise, return directly to step S1.

[0013] Furthermore, the formula for calculating the tapping speed V is as follows: .

[0014] Furthermore, the principle for recording the tare weight is as follows: once it is determined that iron has started to be tapped at the tapping point, this continuous C... o_num The weight W of the first point in the period, used to calculate the iron velocity at point Y. Y This is the weight of the tare weight of the iron produced this time.

[0015] Furthermore, the principle for recording the gross weight is as follows: when the iron tapping position is determined, iron tapping is completed, and the host computer determines that the current iron receiving has ended, a continuous C is selected. c_num The weight W of point X, the last point in each cycle, used to calculate the iron velocity. X As the gross weight of the molten iron; when the molten iron tapping position is determined and the host computer has not yet determined that the current molten iron receiving has ended, and when the track scale loses its reading, continuous C is selected. c_num In each cycle, the point with the largest weight among all the points used to calculate the tapping speed is taken as the gross weight of the tapping for that cycle.

[0016] Furthermore, the iron tapping start counting threshold C o_num and the iron tapping end counting threshold C c_num The value is greater than A.

[0017] Furthermore, the iron tapping end speed threshold V c The selected value is greater than or equal to 60. M min / (A T cycleThe iron tapping start speed threshold V); o The selected value is greater than or equal to 3 V c Among them, V c V o The unit is tons per minute; M min The minimum resolution for track scales, measured in tons; T cycle This is the weight data reading cycle for the host computer, in seconds.

[0018] The present invention achieves the following technical effects:

[0019] 1. Real-time tracking of the iron discharge status can be achieved with only a track scale, which is low in cost.

[0020] 2. The weight calculation is accurate, which can address the issue of vehicles leaving quickly.

[0021] 3. It has high real-time performance and can identify iron in as little as 10 seconds. Attached Figure Description

[0022] Figure 1 This is the iron gate opening judgment logic of the present invention;

[0023] Figure 2 This is an example of a track scale reading record according to the present invention;

[0024] Figure 3 This invention relates to an example of recording the readings of the track scale when the molten iron ladle leaves immediately. Detailed Implementation

[0025] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention, primarily used to illustrate the embodiments and to explain the operating principles of the embodiments in conjunction with the relevant descriptions in the specification. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention.

[0026] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0027] This invention provides a fully automatic iron discharge status tracking method based on a rail scale, which can realize fully automatic iron discharge status tracking based on the weighing data and time data of the rail scale.

[0028] Rail scale weighing: When the carrier carrying the ladle is correctly placed on the rail scale, the rail scale can weigh the total weight of the carrier, ladle and molten iron, and the programmable logic controller (PLC) transmits the data to the upper-level equipment.

[0029] The main parameters in this method are as follows:

[0030] 1. Track scale resolution, denoted as M min Since the molten iron and its carriers are both measured in the hundreds of tons, the resolution of rail scales is generally from ten kilograms to tens of kilograms.

[0031] 2. The weight data reading cycle of the host computer is denoted as T. cycle The unit is seconds. The current weight reading of the track scale is read every T time interval. The host computer system does not need to be synchronized with the track scale PLC.

[0032] 3. The Nth track scale weight reading is denoted as W. N The unit is tons.

[0033] 4. The time when the Nth track scale weight is acquired by the PLC is denoted as T. N .

[0034] 5. Determine the threshold speed at which iron tapping begins, denoted as V. o The unit is tons per minute.

[0035] 6. Determine the iron tapping start counting threshold, denoted as C. o_num .

[0036] 7. Determine the threshold for the iron tapping speed at the end of the tapping process, denoted as V. C The unit is tons per minute.

[0037] 8. Determine the iron tapping end counting threshold, denoted as C. c_num .

[0038] 9. The interval between points used to calculate the tapping speed is denoted as A.

[0039] 10. The maximum possible tapping speed, denoted as V. max The unit is tons per minute.

[0040] 11. The continuous cycle count value that marks the start of iron tapping – the count starting from the start of iron tapping – is denoted as C. o .

[0041] 12. The continuous cycle count value that marks the end of tapping – the tapping end count – is denoted as C. c .

[0042] The following section, using graphs and formulas, details how to achieve fully automated iron tapping status tracking based on the above parameters.

[0043] The iron tapping status mainly records when and where iron tapping begins and ends at each tapping port, as well as the weight of the iron tapped.

[0044] The fully automatic iron tapping status tracking method based on a track scale of the present invention includes the following steps: acquiring the weight and time data of the current iron tapping position through the track scale; calculating the iron tapping speed in real time through continuous periodic weight and time data; determining the start of iron tapping through the iron tapping speed, iron tapping start speed threshold, iron tapping start count, and iron tapping start count threshold, and recording the tare weight of the track scale; determining the end of iron tapping through the iron tapping speed, iron tapping end speed threshold, iron tapping end count, and iron tapping end count threshold, and recording the gross weight of the track scale, etc.

[0045] The specific logical flow is as follows: Figure 1 As shown, it includes the following steps:

[0046] Step S1: Read the weight reading W of track scale weight data point X for the current cycle. X With time data T X ;

[0047] Step S2: Find the weight reading W of the track scale at track scale data point Y in the previous A cycles. Y With time data T Y ;

[0048] Step S3: According to W X W Y T X T Y Calculate the iron tapping speed V; then, execute the start of iron tapping judgment in step S4-1 and the end of iron tapping judgment in step S4-2;

[0049] Step S4-1: Compare V and V o and V max When V o <V<V max At that time, the counting of C begins when the iron is tapped. o Increase by 1; proceed to step S5; otherwise, start counting C when tapping iron. o Set to 0, then return to step S1;

[0050] Step S5: Compare C o and C o_num When C o >C o_num When the time is right, mark it as the start of tapping and record the tare weight of the tapped iron, then return to step S1; otherwise, return directly to step S1.

[0051] Step S4-2: Compare V and V c When V < V c At that time, the iron tapping ended counting C c Increment by 1, proceed to step S6; otherwise, stop the iron tapping count C. c Set to 0, then return to step S1;

[0052] Step S6: Compare Cc and C c_num When C c >C c_num If the iron tapping is complete, record the gross weight of the tapped iron and return to step S1; otherwise, return directly to step S1.

[0053] The formula for calculating the tapping speed V is as follows:

[0054]

[0055] The criteria for selecting each parameter are as follows:

[0056] Parameter T cycle The choice of A depends primarily on the minimum resolution of the orbital scale (hereinafter referred to as M). min A T cycle This determines the length of the interval used to calculate the iron velocity. The higher the resolution, the better. T cycle The smaller the resolution, the better. T cycle It needs to be increased.

[0057] Parameter limitations:

[0058] C o_num and C c_num The value needs to be greater than A to prevent errors caused by slight vehicle movements or fluctuations in the track scale readings.

[0059] V max This setting can prevent incorrect judgments caused when the vehicle is not completely stopped or is being jerked.

[0060] V c The selected value needs to be greater than or equal to 60. M min / (A T cycle ).

[0061] V o The selected value must be greater than or equal to 3. V c .

[0062] Next is the selection of the starting weight (tare weight) and the ending weight (gross weight).

[0063] Since the rail scale continuously records the weight on the rail scale, selecting the weight at an accurate point in time as the tare weight and gross weight can ensure the accuracy of tracking the weight of the tapped iron.

[0064] Tare weight recording principle: Once the tapping point is determined to have started tapping, it means there is continuous C. o_num The iron tapping rate in each cycle is greater than the set V.o Then this continuous C o_num The weight W of the first point in the period, used to calculate the iron velocity at point Y. Y This is the weight of the tare weight of the iron produced this time.

[0065] Gross weight recording principle: Once the tapping position is determined and tapping is completed, it means there is continuous C c_num The iron tapping rate in each cycle is less than the set V. c There are two possibilities at this point:

[0066] 1. After the ladle receives the iron, it is not immediately removed. Therefore, the weight W of point X (the last point in the continuous cycle) is selected for calculating the iron velocity. X This refers to the gross weight of the iron produced this time.

[0067] 2. After the ladle finishes receiving iron, it is immediately pulled away, causing the scale to lose its reading before the host computer can determine that the current iron receiving is finished. In this case, the point with the largest weight among all points used to calculate the iron discharging speed in the continuous cycle is used as the gross weight of the iron discharging for this time.

[0068] The following specific examples will further explain how this invention is implemented.

[0069] Figure 2 It is a thumbnail of the iron discharge record of the track scale, focusing on the area near the start time of iron discharge (area ①) and the area near the end time of iron discharge (area ②).

[0070] In this example, the track scale resolution is 20 kg, or 0.02 tons. T cycle If the time is 2 seconds, and A chooses 9 seconds, then A... T cycle It lasts for 18 seconds.

[0071] V c ≥60 0.02 / 18≈0.0667, take V c It is 0.1 tons / minute.

[0072] V o Greater than or equal to 3 0.1 = 0.3, take V c It is 0.6 tons / minute.

[0073] C o_num and C c_num Both need to be greater than 9, so we choose C here. o_num = C c_num = 12.

[0074] Based on production performance, V max It is set at 9.0 tons / minute.

[0075] In the data shown in the figure, starting from point J, the velocity begins to exceed V within an 18-second interval. o And it maintained this for 12 cycles, so it was determined that tapping began at this moment. The weight of the red dot corresponds to the tare weight of the ladle, with a reading of 113.1 tons. Starting from point K (the first point to the right of the blue dot), the velocity began to drop below V within an 18-second interval. c And it maintained for 12 cycles, so it was determined that the tapping was over at this moment. The weight of the blue dot relative to the gross weight of the jar was 256.1 tons.

[0076] like Figure 3 As shown, when the molten iron ladle was immediately pulled away after tapping, causing a sharp drop in the track scale reading, the tracking data at the start of tapping remained unchanged; at the end of tapping, because the ladle left the track scale, the data dropped sharply, and at point K, the average tapping speed within the 18-second area was already lower than V. c Therefore, C starts at this point. c The counting process continues for 12 cycles before determining the end of the iron tapping. The weight of the blue dot represents the maximum value in the interval and is therefore determined as the gross weight.

[0077] The method of the present invention has the following advantages over existing technologies:

[0078] 1. Real-time tracking of the iron discharge status can be achieved with only a track scale, which is low in cost.

[0079] 2. The weight calculation is accurate, which can address the issue of vehicles leaving quickly.

[0080] 3. It has high real-time performance and can identify iron in as little as 10 seconds.

[0081] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which shall be within the scope of protection of the invention.

Claims

1. A fully automated iron tapping status tracking method based on a track scale, characterized in that, include: Step S1: Read the weight reading W of track scale weight data point X for the current cycle. X With time data T X ; Step S2: Find the weight reading W of the track balance weight data point Y in the previous A cycles. Y With time data T Y ; Step S3: According to W X W Y T X T Y Calculate the iron tapping speed V; then, execute the start of iron tapping judgment in steps S4-1 and S5, and the end of iron tapping judgment in steps S4-2 and S6. Step S4-1: Compare V with the iron tapping start speed threshold V o and maximum iron tapping speed V max When V o <V<V max At that time, the counting of C begins when the iron is tapped. o Increase by 1; proceed to step S5; otherwise, start counting C when tapping iron. o Set to 0, then return to step S1; Step S5: Compare the iron content and start counting C o And the threshold C for starting to tap iron o_num When C o >C o_num When the time is right, mark it as the start of tapping and record the tare weight of the tapped iron, then return to step S1; otherwise, return directly to step S1. Step S4-2: Compare V with the iron tapping end speed threshold V c When V < V c When the iron tapping end count Cc is reached, increment it by 1 and proceed to step S6; otherwise, set the iron tapping end count Cc to 0 and return to step S1. Step S6: Compare the iron output end count C c And the iron tapping end counting threshold C c_num When C c >C c_num When the iron tapping is completed, record the gross weight of the iron tapped, and then return to step S1; Otherwise, return directly to step S1; Wherein, the iron tapping start counting threshold C o_num and the iron tapping end counting threshold C c_num The value is greater than A.

2. The fully automated iron tapping status tracking method based on a track scale as described in claim 1, characterized in that, The formula for calculating the iron tapping speed V is as follows: .

3. The fully automatic iron tapping status tracking method based on a track scale as described in claim 1, characterized in that, The principle for recording the tare weight is as follows: once it is determined that iron has started to be tapped from the tapping position, this continuous C... o_num The weight W of the first point in the period, used to calculate the iron velocity at point Y. Y This is the weight of the tare weight of the iron produced this time.

4. The fully automatic iron tapping status tracking method based on a track scale as described in claim 1, characterized in that, The principle for recording the gross weight is as follows: when the iron tapping position is determined, iron tapping is completed, and the host computer determines that the current iron receiving has ended, select continuous C. c_num The weight W of point X, the last point in each cycle, used to calculate the iron velocity. X As the gross weight of the molten iron; when the molten iron tapping position is determined and the host computer has not yet determined that the current molten iron receiving has ended, and when the track scale loses its reading, continuous C is selected. c_num In each cycle, the point with the largest weight among all the points used to calculate the tapping speed is taken as the gross weight of the tapping for that cycle.

5. The fully automatic iron tapping status tracking method based on a track scale as described in claim 1, characterized in that, The iron tapping end speed threshold V c The selected value is greater than or equal to 60*M min / (A*T cycle The iron tapping start speed threshold V); o The selected value is greater than or equal to 3*V c ; Among them, V c V o The unit is tons per minute; M min The minimum resolution for track scales, measured in tons; T cycle This is the weight data reading cycle for the host computer, in seconds.

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