A method for matching billet temperature with billet number

Abstract

A method for matching billet temperatures with billet numbers relates to radiation temperature measurement technology and the field of steel rolling production. The method comprises a billet presence detection unit, a billet transport control unit, a temperature measurement unit, an MES unit, a computer, and billets. The billet transport control unit includes a billet conveyor roller, a motor that controls roller rotation, and a PLC that controls the motor, primarily used to transport billets to designated locations; a billet presence detection unit that detects the presence of billets at the current location; and a temperature measurement unit that measures billet temperatures. The present invention has the beneficial effect of resolving the current issue of inaccurate billet counting based on photoelectric triggering when billets are continuously passed one after another, even close together, resulting in inaccurate matching between billet numbers and measured billet temperatures.

Description

Technical Field

[0001] The present invention relates to the field of radiation temperature measurement technology and steel rolling production, and in particular to a method for matching billet temperature with billet number. Background Art

[0002] Hot charging and hot delivery of billets is an important means of saving energy and improving efficiency. Billet temperature not only serves as the basis for heating control in the reheating furnace but also a key parameter for controlling subsequent rolling quality. The billet hot charging temperature determines the heating process and gas consumption, and also affects rolling quality. It is important to avoid charging billets into the furnace in the two-phase region to avoid increasing the risk of surface cracking during rolling. Matching billet temperature with billet number is key to billet tracking and heating control.

[0003] In actual production, the method of judging whether the steel billet is in a state or not is mainly used to match the temperature of the steel billet with the number, that is, the photoelectric switch signal of the steel billet state detection is used for judgment. When the state changes from no steel billet to the state of steel billet, and then to the state of no steel billet, it indicates that a steel billet has passed. This method is accurate in counting steel billets and matching steel billet numbers when the steel billets pass through one by one at intervals. However, when the steel billets pass continuously without intervals, the steel billet counting is inaccurate, and it is usually necessary to match the steel billet numbers and steel billets through manual observation, which is labor-intensive and labor-intensive. Furthermore, when the steel billets pass through one by one without intervals, the steel billet temperatures measured by the thermometer are continuous, and it is difficult to distinguish the specific temperature of each steel billet, that is, it is difficult to accurately match the steel billet temperature with the steel billet number. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for matching the temperature of a steel billet with the steel billet number in response to the deficiencies and defects in the prior art. The system and method can solve the problem that the current steel billets pass one after another continuously, or even close together, and the steel billet counting based on photoelectric triggering is inaccurate, resulting in inaccurate matching between the steel billet number and the measured temperature of the steel billet.

[0005] To achieve the above-mentioned object, the present invention adopts the following technical scheme: a method for matching the temperature of a steel billet with the steel billet number, which comprises: a steel billet presence detection unit 3, a steel billet transport control unit 1, a temperature measuring unit 4, an MES unit, a computer and a steel billet 2; the steel billet transport control unit 1 comprises: a roller for transporting the steel billet, a motor for controlling the rotation of the roller and a PLC for controlling the motor: mainly used to transport the steel billet 2 to a specified position; a steel billet presence detection unit 3: used to detect whether there is a steel billet 2 at the current position; a temperature measuring unit 4: used to measure the temperature of the steel billet 2; the computer is electrically connected to the steel billet presence detection unit 3, the PLC for controlling the motor, the temperature measuring unit 4 and the MES unit respectively, the computer obtains a curve of the change of the state of the steel billet 2 over time by analyzing the signal of the steel billet presence detection unit 3, analyzes the roller speed by the roller motion state and the rotation characteristics of the motor and the roller, and draws a curve of the change of the roller speed over time, measures the temperature of the measured area by the temperature measuring unit 4 and analyzes and obtains the highest temperature, and draws a curve of the change of the highest temperature over time.

[0006] Furthermore, the computer obtains information about all steel billets 2 that pass through the time period from the MES unit, and combines the curve of the change of the steel billet's presence or absence status over time, the curve of the roller speed change over time, and the curve of the temperature change over time to analyze the number of steel billets, the temperature of each steel billet when it leaves the temperature measurement area, and the number of each steel billet, so as to achieve matching of the steel billet temperature and the steel billet number.

[0007] Furthermore, the steel billet presence detection unit 3 adopts a through-beam photoelectric switch.

[0008] Furthermore, the temperature measuring unit 4 is an infrared thermal imager.

[0009] Furthermore, the center line of the measurement area of ​​the temperature measuring unit 4 coincides with the center line of the steel billet presence detection unit 3 .

[0010] A method for matching billet temperature with billet number comprises the following steps: plotting a curve showing the change of the billet presence or absence status over time, a curve showing the change of roller speed over time, and a curve showing the change of maximum temperature over time on the same time axis; removing portions where there is no billet or the billet is not moving based on analysis of the above curves, and retaining portions where there is billet and the billet is moving; analyzing the approximate length of the billet passing through the curve where there is billet and the billet is moving; analyzing the above curve based on information on the billet quantity, length, and number obtained from an MES, combined with information on the approximate length of the billet, to obtain a portion corresponding to each billet in the curve, and matching the temperature corresponding to each billet with the billet number.

[0011] After adopting the above technical solution, the beneficial effect of the present invention is: the system and method can solve the current problem that the billets pass through continuously one after another, even close together, and the billet counting based on photoelectric triggering is inaccurate, resulting in inaccurate matching between the billet number and the measured temperature of the billet. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0013] Figure 1 It is a structural schematic diagram of the present invention.

[0014] Description of the reference numerals: billet transport control unit 1 , billet 2 , billet presence detection unit 3 , temperature measurement unit 4 . DETAILED DESCRIPTION

[0015] See Figure 1 As shown, the technical solution adopted in this specific embodiment is: it includes: a steel billet presence detection unit 3, a steel billet transport control unit 1, a temperature measurement unit 4, an MES unit, a computer and a steel billet 2;

[0016] The billet transport control unit 1 includes: a roller conveyor for conveying the billet, a motor for controlling the rotation of the roller, and a PLC for controlling the motor: it is mainly used to convey the billet 2 to the designated location;

[0017] Billet presence detection unit 3: used to detect whether there is a billet 2 at the current position;

[0018] Temperature measuring unit 4: used to measure the temperature of the steel billet 2;

[0019] The computer is electrically connected to the billet presence detection unit 3, the PLC that controls the motor, the temperature measurement unit 4, and the MES unit respectively. The computer obtains a curve showing the change of the presence or absence status of the billet 2 over time by analyzing the signal of the billet presence detection unit 3. The computer analyzes the roller speed through the roller motion state and the rotation characteristics of the motor and roller to draw a curve showing the change of the roller speed over time. The computer measures the temperature of the measured area through the temperature measurement unit 4 and obtains the maximum temperature through analysis, and draws a curve showing the change of the maximum temperature over time.

[0020] To be more specific, the computer obtains information about all the steel billets 2 that pass through the time period from the MES unit, such as the number, length, and number of the steel billets. Combined with the curve of the change of the steel billet's presence or absence status over time, the curve of the roller speed change over time, and the curve of the temperature change over time, the computer analyzes the number of steel billets, the temperature of each steel billet when it leaves the temperature measurement area, and the number of each steel billet to achieve matching of the steel billet temperature and the steel billet number.

[0021] To be more specific, the billet presence detection unit 3 adopts a through-beam photoelectric switch.

[0022] To be more specific, the temperature measuring unit 4 is an infrared thermal imager.

[0023] To be more specific, the center line of the measurement area of ​​the temperature measuring unit 4 coincides with the center line of the steel billet presence detection unit 3 .

[0024] A method for matching billet temperature with billet number comprises the following steps: plotting a curve showing the change of the billet presence or absence status over time, a curve showing the change of roller speed over time, and a curve showing the change of maximum temperature over time on the same time axis; removing portions where there is no billet or the billet is not moving based on analysis of the above curves, and retaining portions where there is billet and the billet is moving; analyzing the approximate length of the billet passing through the curve where there is billet and the billet is moving; analyzing the above curve based on information on the billet quantity, length, and number obtained from an MES, combined with information on the approximate length of the billet, to obtain a portion corresponding to each billet in the curve, and matching the temperature corresponding to each billet with the billet number.

[0025] The above is only used to illustrate the technical solution of the present invention and is not intended to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A device for matching billet temperature with billet number, characterized by: It includes: a steel billet presence detection unit (3), a steel billet transport control unit (1), a temperature measurement unit (4), an MES unit, a computer and a steel billet (2); The steel billet transport control unit (1) comprises: a roller conveying the steel billet, a motor for controlling the rotation of the roller, and a PLC for controlling the motor; the control unit is mainly used to convey the steel billet (2) to a designated location; A steel billet presence detection unit (3): The steel billet presence detection unit (3) is provided on the steel billet transport control unit (1) and is used to detect whether a steel billet (2) exists at a current position; Temperature measuring unit (4): used to measure the temperature of the steel billet (2); the center line of the measuring area of ​​the temperature measuring unit (4) coincides with the center line of the steel billet presence detection unit (3) The computer is electrically connected to the steel billet presence detection unit (3), the PLC controlling the motor, the temperature measurement unit (4) and the MES unit respectively. The computer obtains a curve showing the presence or absence of the steel billet (2) over time by analyzing the signal of the steel billet presence detection unit (3), draws a curve showing the roller speed over time by analyzing the roller motion state and the rotation characteristics of the motor and the roller, measures the temperature of the measured area by the temperature measurement unit (4), obtains the maximum temperature by analysis, and draws a curve showing the maximum temperature over time.

2. The device for matching billet temperature with billet number according to claim 1, characterized in that: The computer obtains information of all steel billets (2) passing through the time period from the MES unit, combines the curve of the change of the state of the steel billet over time, the curve of the change of the roller speed over time, and the curve of the change of the temperature over time, analyzes the number of steel billets, the temperature of each steel billet when it leaves the temperature measurement area, and the number of each steel billet, and achieves matching of the steel billet temperature and the steel billet number.

3. The device for matching billet temperature with billet number according to claim 1, characterized in that: The steel billet presence detection unit (3) adopts a beam-type photoelectric switch.

4. The device for matching billet temperature with billet number according to claim 1, characterized in that: The temperature measuring unit (4) is an infrared thermal imager.

5. A method for matching billet temperature with billet number, using the device for matching billet temperature with billet number according to claim 1, characterized in that: The steps include: S1, plot the curve of the change of the state of the steel billet with time, the curve of the change of the roller speed with time, and the curve of the change of the maximum temperature with time on the same time axis; S2, based on the above curve analysis, remove the part without billet or billet not moving, and keep the part with billet and billet moving; S3, based on the analysis of the curve of the billet and the billet in motion, the approximate length of the billet; S4, based on the billet quantity, length, and number information obtained from the MES, combined with the approximate length information of the billet, analyze the above curve to obtain the portion corresponding to each billet in the curve, and match the temperature corresponding to each billet with the billet number.

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