Slag detection system and method

Abstract

The embodiments of the present application provide a slag detection system and method, relating to the field of casting technology. A detection module is electrically connected to an amplification module, a power supply module is electrically connected to the detection module and the amplification module, and the amplification module is also communicatively connected to a control module. The power supply module is used to power the detection module and send an excitation voltage to the amplification module. The detection module is used to perform electromagnetic induction on molten steel to obtain a detection voltage. The amplification module is used to perform anti-interference processing and amplification processing on the detection voltage sent by the detection module based on the excitation voltage sent by the power supply module to obtain a target voltage. The control module is used to perform slag detection on the target voltage sent by the amplification module. Because the amplification module can perform anti-interference processing on the detection voltage based on the excitation voltage, it can eliminate fluctuations in the detection voltage caused by fluctuations in the excitation current of the power supply, thereby ensuring the accuracy of the detection voltage and improving the accuracy of slag detection.

Description

Technical Field

[0001] The present application relates to the field of casting technology, and in particular to a slag detection system and method. Background Art

[0002] With the continuous advancement of technology in my country's steel industry, the requirements for intelligent manufacturing equipment to achieve higher levels of detection accuracy and automation are becoming increasingly stringent. Currently, ladle slag detection is required in the continuous casting ladle casting process to improve product quality and molten steel yield, reduce employee labor intensity, and reduce equipment modification and maintenance costs.

[0003] However, in the related art, when performing slag detection, the detection accuracy is often low. Summary of the Invention

[0004] In view of this, the purpose of the present application is to provide a slag detection system and method to improve the slag detection accuracy.

[0005] In order to achieve the above objectives, the technical solutions adopted in the embodiments of the present application are as follows:

[0006] In a first aspect, the present application provides a slag detection system, comprising a detection module, an amplification module, a power module, and a control module, wherein the detection module is electrically connected to the amplification module, the power module is electrically connected to the detection module and the amplification module respectively, and the amplification module is further communicatively connected to the control module;

[0007] The power supply module is used to supply power to the detection module and send an excitation voltage to the amplification module;

[0008] The detection module is used to perform electromagnetic induction on the molten steel to obtain a detection voltage;

[0009] The amplification module is used to perform anti-interference processing and amplification processing on the detection voltage sent by the detection module according to the excitation voltage sent by the power supply module to obtain a target voltage;

[0010] The control module is used to perform slag detection on the target voltage sent by the amplification module.

[0011] In an optional embodiment, the amplification module is also used to amplify the detection voltage according to a first amplification factor and to amplify the excitation voltage according to a second amplification factor, and to perform anti-interference processing on the amplified detection voltage based on the amplified excitation voltage to obtain a processing voltage, and to amplify the processing voltage according to a third amplification factor to obtain the target voltage.

[0012] In an optional embodiment, the amplification module includes a first amplifier, a second amplifier, and a third amplifier, the first amplifier is electrically connected to the detection module, the second amplifier is electrically connected to the detection module and the power supply module respectively, the third amplifier is electrically connected to the first amplifier and the second amplifier respectively, and is communicatively connected to the control module;

[0013] The first amplifier is used to obtain the detection voltage and amplify the detection voltage according to the first amplification factor;

[0014] The second amplifier is used to obtain the excitation voltage and amplify the excitation voltage according to the second amplification factor;

[0015] The third amplifier is used to obtain a processing voltage by taking the difference between the amplified excitation voltage and the amplified detection voltage, and to amplify the processing voltage according to the third amplification factor to obtain the target voltage.

[0016] In an optional embodiment, the control module is also used to obtain the weight of a ladle of a ladle equipment for pouring molten steel. When the weight of the ladle is less than a preset weight, the first amplification factor, the second amplification factor and the third amplification factor are adjusted according to the processing voltage and the target voltage.

[0017] In an optional embodiment, the control module is further configured to adjust the first amplification factor and the second amplification factor based on a magnitude relationship between the processing voltage and a preset first voltage threshold, and obtain an adjusted target voltage after the first amplification factor and the second amplification factor are successfully adjusted;

[0018] adjusting the third amplification factor according to the adjusted target voltage and a preset value range, and after the third amplification factor is successfully adjusted, determining whether a product of the adjusted third amplification factor and the adjusted first amplification factor is greater than a preset minimum amplification factor;

[0019] If the product of the adjusted third magnification and the adjusted first magnification is less than or equal to a preset minimum magnification, re-performing the step of adjusting the first magnification and the second magnification until the product of the adjusted third magnification and the adjusted first magnification is greater than the minimum magnification;

[0020] When the product of the adjusted third magnification and the adjusted first magnification is greater than the minimum magnification, it is determined that the first magnification, the second magnification and the third magnification are adjusted successfully, the adjusted target voltage is obtained, and slag detection is performed according to the adjusted target voltage.

[0021] In an optional embodiment, the control module is further configured to, when the processing voltage is greater than or equal to a preset first voltage threshold, increase the sensitivity of the second amplifier according to a preset adjustment parameter to adjust the second amplification factor, determine a new processing voltage based on the adjusted second amplification factor, and determine a magnitude relationship between the new processing voltage and the first voltage threshold;

[0022] If the new processing voltage is greater than or equal to the first voltage threshold, continue to increase the sensitivity of the second amplifier according to the preset adjustment parameter until the new processing voltage is less than the first voltage threshold;

[0023] If the new processing voltage is less than the first voltage threshold, increasing the sensitivity of the first amplifier according to the adjustment parameter to adjust the first amplification factor, determining a new processing voltage based on the adjusted first amplification factor, and determining a magnitude relationship between the new processing voltage and the first voltage threshold;

[0024] If the new processing voltage is less than the first voltage threshold, continue to increase the sensitivity of the first amplifier according to the adjustment parameter until the new processing voltage is not less than the first voltage threshold;

[0025] If the new processing voltage is not less than the first voltage threshold, the sensitivity of the first amplifier is lowered according to the adjustment parameter, and it is determined that the first amplification factor and the second amplification factor are adjusted successfully.

[0026] In an optional embodiment, the upper limit of the preset value range is a second voltage threshold, and the lower limit is a third voltage threshold; the control module is further configured to determine whether the adjusted target voltage is less than the second voltage threshold;

[0027] If the adjusted target voltage is not less than the second voltage threshold, increasing the sensitivity of the third amplifier according to a preset adjustment parameter to adjust the third amplification factor, determining a new target voltage based on the adjusted third amplification factor, and determining whether the new target voltage is less than the second voltage threshold;

[0028] If the new target voltage is not less than the second voltage threshold, continue to increase the sensitivity of the third amplifier according to the preset adjustment parameter until the new target voltage is less than the second voltage threshold;

[0029] If the new target voltage is less than the second voltage threshold, determining whether the new target voltage is greater than a third voltage threshold;

[0030] If the new target voltage is not greater than the third voltage threshold, lowering the sensitivity of the third amplifier according to a preset adjustment parameter to adjust the third amplification factor, determining a new target voltage based on the adjusted third amplification factor, and determining whether the new target voltage is greater than the third voltage threshold;

[0031] If the new target voltage is not greater than the third voltage threshold, continuing to reduce the sensitivity of the third amplifier according to the preset adjustment parameter until the new target voltage is greater than the third voltage threshold;

[0032] If the new target voltage is greater than the third voltage threshold, it is determined that the third amplification factor is adjusted successfully.

[0033] In an optional embodiment, the slag detection system further includes a PLC, and the PLC is communicatively connected to the control module;

[0034] The PLC is used to obtain the slag detection result sent by the control module and perform slag amount analysis based on the slag detection result.

[0035] In an optional embodiment, the slag detection system further includes an operation module, and the operation module is communicatively connected to the PLC;

[0036] The operation module is used to receive the slag analysis result sent by the PLC and display the slag analysis result.

[0037] In a second aspect, the present application provides a slag detection method, which is applied to a slag detection system. The slag detection system includes a detection module, an amplification module, a power supply module, and a control module. The detection module is electrically connected to the amplification module, the power supply module is electrically connected to the detection module and the amplification module respectively, and the amplification module is also communicatively connected to the control module. The power supply module is used to power the detection module and send an excitation voltage to the amplification module. The method includes:

[0038] The detection module performs electromagnetic induction on the molten steel to obtain a detection voltage;

[0039] The amplification module performs anti-interference processing and amplification processing on the detection voltage sent by the detection module according to the excitation voltage sent by the power supply module to obtain a target voltage;

[0040] The control module performs slag detection on the target voltage sent by the amplification module.

[0041] In the slag detection system and method provided by the embodiments of the present application, a detection module can perform electromagnetic induction on molten steel to obtain a detection voltage. An amplification module can perform anti-interference processing and amplification on the detection voltage sent by the detection module based on the excitation voltage sent by the power supply module to obtain a target voltage. Based on this, the control module can perform slag detection based on the target voltage sent by the amplification module. Because the amplification module can perform anti-interference processing on the detection voltage based on the excitation voltage, fluctuations in the detection voltage caused by fluctuations in the power supply's excitation current can be eliminated, thereby ensuring the accuracy of the detection voltage and improving the accuracy of slag detection.

[0042] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0044] Figure 1 The following is a schematic diagram showing the structure of a ladle slag detection system in the related art;

[0045] Figure 2 A schematic structural diagram of a slag detection system provided in an embodiment of the present application is shown;

[0046] Figure 3 Another structural schematic diagram of the slag detection system provided in an embodiment of the present application is shown;

[0047] Figure 4 Another block diagram of a slag detection system provided in an embodiment of the present application is shown;

[0048] Figure 5 An example diagram of an amplification module is shown;

[0049] Figure 6 A schematic flow chart of a slag detection method provided in an embodiment of the present application is shown.

[0050] Icon: 1-sensor housing; 2-induction coil; 3-excitation coil; 4-amplifier; 5-amplifier; 10-detection module; 20-amplification module; 30-power module; 40-control module; 50-PLC; 60-operation module. DETAILED DESCRIPTION

[0051] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0052] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present application.

[0053] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0054] With the continuous advancement of technology in my country's steel industry, the requirements for intelligent manufacturing equipment's detection accuracy and automation are becoming increasingly stringent. Currently, ladle slag detection in the continuous casting ladle casting process can improve product quality and molten steel yield, reduce employee workload, and reduce equipment modification and maintenance costs. Ladle slag detection is a key technology in the steel production process, primarily used to monitor and detect whether slag (i.e., steel slag) in the molten steel enters the shroud during the continuous casting process. This process is crucial for ensuring steel product quality, improving molten steel yield, and reducing equipment maintenance costs.

[0055] A ladle is a container for high-temperature molten steel, typically a large ladle, used to transport molten steel from the steelmaking furnace to the continuous casting machine for casting. During the pouring process, non-metallic impurities (such as oxides) may be present in the molten steel. These impurities are called "slag." If slag flows along with the molten steel as it flows from the ladle into the shroud, it can seriously affect steel quality, such as reducing steel purity and impairing steel properties. Therefore, real-time monitoring of slag discharge is essential to ensure timely action to prevent slag from entering the continuous casting system, thereby improving product quality and steel yield.

[0056] Figure 1 This is a schematic diagram of the structure of the ladle slag detection system in the related technology. Figure 1 In this detection system, the sensor may include a sensor housing 1, an induction coil 2, and an excitation coil 3. The sensor housing may provide mechanical support and electromagnetic shielding to ensure that the sensor can operate stably in a high-temperature, high-interference environment. The excitation coil may generate an alternating magnetic field to provide basic conditions for the induction coil. The induction coil may detect the slag signal and convert it into an electrical signal. The amplification device 4 may amplify the output voltage Vi of the sensor through the amplifier 5 to obtain the output voltage V1. During the amplification process, the change in Vi (slag voltage) △Vi may also be amplified to △V1.

[0057] In related technologies, ladle slag detection systems often use an excitation current, Ib, to power the sensor. However, due to the characteristics of electronic components, this excitation current often fluctuates. This fluctuation causes the sensor's output voltage, Vi, to fluctuate synchronously. This fluctuation is also amplified by a single-stage amplifier and added to the final target voltage. Therefore, even if the amplifier can increase the overall signal strength, the presence of interference signals still makes it difficult to separate the effective slag voltage from the complex background signal, resulting in low slag detection accuracy.

[0058] Based on this, the embodiments of the present application provide a slag detection system and method to solve the above problems.

[0059] Specifically, Figure 2 A schematic diagram of the structure of the slag detection system provided in the embodiment of the present application is shown in FIG. Figure 2 The slag detection system includes a detection module 10, an amplification module 20, a power supply module 30 and a control module 40, wherein the detection module 10 is electrically connected to the amplification module 20, the power supply module 30 is electrically connected to the detection module 10 and the amplification module 20 respectively, and the amplification module 20 is also communicatively connected to the control module 40.

[0060] In this embodiment, the power supply module is used to power the detection module and send an excitation voltage to the amplification module. The detection module can be used to perform electromagnetic induction on the molten steel to obtain a detection voltage. The amplification module can be used to perform anti-interference processing and amplification processing on the detection voltage sent by the detection module according to the excitation voltage sent by the power supply module to obtain a target voltage. The control module can be used to perform slag detection on the target voltage sent by the amplification module.

[0061] Optionally, the detection module may be a support ring sensor. In this embodiment, the support ring used on the shroud manipulator may be configured as a sensor to serve as a detection module for detecting slag drop in the molten steel.

[0062] It can be understood that the support ring type sensor adopts the principle of electromagnetic induction, and its induction coil can use special high-temperature resistant wires, and the packaging shell can be made of non-magnetic high-temperature metal materials to avoid interference with the magnetic field. The support ring type sensor can be electrically connected to the amplification module through lead wires and high-temperature cables. It does not require cooling and can work in a high-temperature environment for a long time.

[0063] In actual applications, when molten steel flows near the support ring sensor, the induction coil can output a corresponding voltage signal based on the change in the magnetic field. When slag is present in the molten steel, the magnetic permeability and conductivity of the slag are different from those of pure molten steel. Therefore, this change will cause the amplitude of the voltage signal generated in the induction coil to change.

[0064] Optionally, in order to reduce signal attenuation and avoid introducing unnecessary interference, the amplification module can be set near the long nozzle manipulator, and the distance between it and the sensor should be small, for example, less than 12 meters.

[0065] In this embodiment, the amplification module can not only amplify the detection voltage, but also perform anti-interference processing on the detection voltage based on the excitation voltage, so that the fluctuation of the sensor output voltage caused by the fluctuation of the excitation current is offset, thereby eliminating the influence of the excitation current on the detection voltage and improving the detection accuracy.

[0066] Optionally, the power supply module may be a constant current excitation power supply to provide a stable AC excitation current to the sensor, ensuring that the excitation current is not affected by changes in the coil resistance.

[0067] In the slag detection system provided in the embodiments of the present application, a detection module can perform electromagnetic induction on molten steel to obtain a detection voltage. An amplification module can perform anti-interference processing and amplification on the detection voltage sent by the detection module based on the excitation voltage sent by the power supply module to obtain a target voltage. Based on this, the control module can perform slag detection based on the target voltage sent by the amplification module. Because the amplification module can perform anti-interference processing on the detection voltage based on the excitation voltage, fluctuations in the detection voltage caused by fluctuations in the power supply's excitation current can be eliminated, thereby ensuring the accuracy of the detection voltage and improving the precision of slag detection.

[0068] Optionally, in Figure 2 On the basis of Figure 3 For another structural diagram of the slag detection system provided in the embodiment of the present application, please refer to Figure 3 The slag detection system further includes a PLC 50, which is in communication with the control module and can be used to obtain the slag detection result sent by the control module and perform slag amount analysis based on the slag detection result.

[0069] In addition, please continue to see Figure 3The slag detection system may further include an operating module 60, which is in communication with the PLC. The operating module may be configured to receive a slag analysis result sent by the PLC and display the slag analysis result.

[0070] Optionally, the PLC can perform slag quantity analysis based on the slag detection results, such as curve analysis, whether to alarm, etc. In addition, the PLC can also control the control module, such as issuing data processing instructions to the control module based on some operating instructions issued by the user, etc.

[0071] Optionally, the operation module can be used for on-site user operations and data display to the user. For example, the operation module may include a display interface, operation buttons, alarm indicators, etc. The operation module can display a slag volume curve to enable operators to promptly understand the casting status, issue a slag volume alarm when the slag volume exceeds a preset slag volume threshold, obtain operation instructions issued by the user based on the operation buttons and send them to the PLC, etc.

[0072] As you can see, the PLC, as the core data processing unit, is responsible for acquiring and analyzing slag detection results from the control module. The operation module, acting as the interface for human-computer interaction, is responsible for presenting the PLC's analysis results to the user in a visual format. This design not only improves the system's automation level but also significantly enhances operational convenience and reliability.

[0073] Please continue to see Figure 1 In the related art, a single-stage amplifier is often used to amplify the detection voltage Vi output by the sensor to obtain V1. However, due to the maximum range of electronic components, the maximum value of V1 cannot exceed 10V. In the early stage of sensor use, its output voltage Vi is generally around 45mV, but as the use time increases, Vi will gradually increase to around 75mV. Taking into account the usage margin, the maximum voltage of V1 is generally not allowed to exceed 7.5V (7500mV). Therefore, the amplification factor of the single-stage amplifier is generally not set to exceed 7500 / 75=100. When slag is discharged from the ladle, the change in Vi (slag volume voltage) △Vi is generally between 0.1mV and 0.7mV. However, when there is a lot of cold steel on the inner wall of the nozzle, the change in the sensor output voltage Vi △Vi will be significantly reduced, usually less than 0.1mV. The fundamental reason for this phenomenon is that the presence of cold steel changes the magnetic field distribution around the induction coil, thereby weakening the actual impact of the slag volume change on the induced voltage.

[0074] During the above steps, the amplification module needs to amplify the detection voltage to extract a valid slag voltage signal. However, existing single-stage amplifiers typically have an amplification factor of no more than 100x. This means that even if the detection voltage Vi is amplified, the change △V1 (i.e., the amplified slag voltage) is only equal to △Vi multiplied by the amplification factor. When there is a high concentration of cold steel on the inner wall of the nozzle, △V1 is typically less than 10mV. Such a weak signal is difficult to accurately identify and distinguish in actual detection, especially in the presence of noise and other interfering signals, which can easily drown out the valid signal.

[0075] Obviously, how to optimize the amplification process is also an important issue that needs to be solved urgently.

[0076] In order to solve this problem, the amplification module can also be used to amplify the detection voltage according to the first amplification factor and the excitation voltage according to the second amplification factor, and perform anti-interference processing on the amplified detection voltage according to the amplified excitation voltage to obtain the processing voltage, and amplify the processing voltage according to the third amplification factor to obtain the target voltage.

[0077] Optionally, the first magnification, the second magnification and the third magnification can be set according to actual application conditions.

[0078] In this embodiment, the amplification module first amplifies the detection voltage (denoted as Vi) by a first amplification factor (denoted as K1) to obtain an amplified detection voltage V1, expressed as V1 = K1 * Vi. The first amplification factor K1 is used to significantly enhance the overall strength of the detection voltage, particularly the slag voltage variation (denoted as ΔVi). As can be appreciated, after amplification, the slag voltage variation (denoted as ΔV1) can be expressed as ΔV1 = K1 * ΔVi.

[0079] Furthermore, the amplification module can amplify the excitation voltage (denoted as Vb) by a second amplification factor (denoted as K2) to obtain an amplified excitation voltage V2, expressed as V2 = K2 * Vb. As can be appreciated, amplifying the excitation voltage can be used to subsequently offset interference signals introduced by excitation current fluctuations.

[0080] Furthermore, the amplification module can then perform anti-interference processing on the detection voltage by taking the difference between the amplified detection voltage V1 and the amplified excitation voltage V2, thereby obtaining a processed voltage (denoted as V1-V2). It should be noted that the purpose of this difference operation is to eliminate the impact of excitation current fluctuations on the detection voltage. Specifically, because excitation current fluctuations can cause additional interference components in the detection voltage, these interference components are also amplified by the amplifier and superimposed on the output signal. Therefore, the difference operation can effectively remove these interference signals, thereby improving the signal-to-noise ratio of the target signal.

[0081] The amplification module then further amplifies the processing voltage (V1-V2) by a third amplification factor (denoted as K3) to obtain the target voltage (denoted as V3). The expression for this is V3 = K3 * (V1-V2). This third amplification factor, K3, is used to further enhance the target signal strength to ensure it meets the requirements of subsequent slag detection. After this amplification process, the change in slag voltage (denoted as ΔV3) can be expressed as ΔV3 = K3 * ΔV1 = K3 * K1 * ΔVi. Therefore, the final slag voltage amplification factor, K, can be defined as K = K1 * K3.

[0082] The slag detection system provided in the embodiment of the present application significantly improves the effective strength of the slag amount signal in the detection voltage through step-by-step amplification and difference processing, while effectively suppressing the influence of interference signals, ensuring that the target voltage (V3) can accurately reflect the changes in the slag amount in the molten steel, thereby providing reliable data support for subsequent slag detection.

[0083] Optionally, the functions of the above-mentioned amplification module can be completed by multiple amplifiers in collaboration.

[0084] Specifically, in Figure 2 On the basis of Figure 4 For another block diagram of the slag detection system provided in the embodiment of the present application, please refer to Figure 4 The amplification module 20 may include a first amplifier, a second amplifier and a third amplifier, the first amplifier is electrically connected to the detection module, the second amplifier is electrically connected to the detection module and the power supply module respectively, the third amplifier is electrically connected to the first amplifier and the second amplifier respectively, and is communicatively connected to the control module.

[0085] In this embodiment, the first amplifier can be used to obtain a detection voltage and amplify the detection voltage according to a first amplification factor. The second amplifier can be used to obtain an excitation voltage and amplify the excitation voltage according to a second amplification factor. The third amplifier can be used to obtain a processing voltage by taking the difference between the amplified excitation voltage and the amplified detection voltage, and amplify the processing voltage according to the third amplification factor to obtain a target voltage.

[0086] In one possible implementation, Figure 5 For a larger module example, see Figure 5The first amplifier A1 can obtain a detection voltage Vi from the detection module and amplify it according to a first amplification factor K1 to obtain an amplified detection voltage V1. The second amplifier A2 can obtain an excitation voltage Vb from the detection module and the power supply module, respectively, and amplify the excitation voltage Vb according to a second amplification factor K2 to obtain an amplified excitation voltage V2. The third amplifier A3 can calculate the difference between the amplified detection voltage V1 and the amplified excitation voltage V2 to obtain a processed voltage (V1-V2), and further amplify the processed voltage according to a third amplification factor K3 to obtain a target voltage V3.

[0087] Optionally, the first, second, and third magnification factors can be initially set to default values. Considering that the detection voltage varies with the temperature and service life of the nozzle area, the first, second, and third magnification factors are not fixed. Therefore, the control module needs to dynamically adjust the first, second, and third magnification factors based on actual operating conditions before the slag discharging system officially begins slag discharging detection.

[0088] Specifically, the control module can also be used to obtain the weight of the ladle of the ladle equipment for dumping molten steel. When the weight of the ladle is less than the preset weight, the first magnification, the second magnification, and the third magnification are adjusted according to the processing voltage and the target voltage. Optionally, when the weight of the ladle is less than the preset weight, it indicates that the slag may enter the continuous casting system along with the steel flow, that is, the "slag dropping" situation may occur. Therefore, it is necessary to first adjust the magnification so that the magnification is suitable for specific slag dropping detection and ensure that the target voltage during the slag dropping detection process does not exceed the range and cause the system to fail. Optionally, the preset weight can be set according to the actual application situation, and this application does not make too many restrictions on this.

[0089] In one possible implementation, the control module may first adjust the first and second amplification factors to minimize the processing voltage, and then adjust the third amplification factor to ensure that the target voltage is within a preset value range, thereby ensuring that the target voltage does not exceed the maximum range when slag removal begins. In this embodiment, the control module may also be configured to adjust the first and second amplification factors based on the relationship between the processing voltage and a preset first voltage threshold. After the first and second amplification factors are successfully adjusted, the adjusted target voltage is obtained. The third amplification factor is then adjusted based on the adjusted target voltage and the preset value range. After the third amplification factor is successfully adjusted, it is determined whether the product of the adjusted third amplification factor and the adjusted first amplification factor is greater than a preset minimum amplification factor.

[0090] When the product of the adjusted third magnification and the adjusted first magnification is less than or equal to the preset minimum magnification, the steps of adjusting the first magnification and the second magnification are re-executed until the product of the adjusted third magnification and the adjusted first magnification is greater than the minimum magnification. When the product of the adjusted third magnification and the adjusted first magnification is greater than the minimum magnification, it is determined that the adjustment of the first magnification, the second magnification and the third magnification is successful, the adjusted target voltage is obtained, and slag detection is performed based on the adjusted target voltage.

[0091] Optionally, in order to ensure that the target voltage does not exceed the range limit of the amplifier circuit, it is necessary to first ensure that the processing voltage is as small as possible while the slag voltage remains unchanged. At this time, even if the third amplification factor is large, the target voltage will not exceed the range limit.

[0092] For example, if the first amplification factor K1=100 can ensure that the amplified detection voltage V1 will not exceed the range limit of the circuit ±10V, then the amplified excitation voltage V2 can be made close enough to V1, thereby ensuring that the processing voltage V1-V2 is small enough but the slag voltage △V1 remains unchanged. At this time, if the third amplification factor K3=100, it can also ensure that the target voltage V3 will not exceed the range limit of the circuit ±10V, and the final amplification factor of the slag voltage △V3 is K=K1*K3=100*100=10000, so that the final amplification factor is increased by 100 times compared with the amplification factor in the related technology.

[0093] Optionally, after adjusting the first and second amplification factors, the third amplification factor needs to be adjusted according to the target voltage to ensure that the target voltage range is within the preset value range before the slag detection is officially activated, thereby ensuring that even if the large bag starts to slag, the target voltage will not exceed the range limit.

[0094] For example, the preset value range can be -2V~-4V. Since the maximum voltage of the amplifier is not allowed to exceed 7.5V, if the target voltage is between -2V~-4V before slag unloading, then when the slag unloading of the large ladle begins, the maximum amplitude allowed for V3 to increase is 7.5V-(-2.0)=9.5V, ensuring that V3 will not exceed the range limit even if the slag unloading of the large ladle begins.

[0095] In addition, in order to ensure that the overall amplification capability of the slag detection system can meet the detection requirements and avoid signal distortion or detection failure due to too low amplification factor, the control module also needs to determine whether the product of the adjusted third amplification factor and the adjusted first amplification factor is greater than the preset minimum amplification factor.

[0096] It can be understood that if the product of the adjusted third magnification and the adjusted first magnification is less than or equal to the minimum magnification, it indicates that the current magnification combination cannot meet the requirements, and the system needs to re-execute the adjustment steps of the first magnification and the second magnification until the product of the adjusted third magnification and the adjusted first magnification is greater than the preset minimum magnification.

[0097] It is understood that if the first and second amplification factors are successfully adjusted based on the process voltage, and the third amplification factor is successfully adjusted based on the target voltage, and the third amplification factor is greater than the minimum amplification factor, then it can be determined that the first, second, and third amplification factors have been successfully adjusted. The following provides a possible implementation method for adjusting the first and second amplification factors based on the relationship between the process voltage and a preset first voltage threshold.

[0098] Specifically, the control module is further configured to, when the processing voltage is greater than or equal to a preset first voltage threshold, increase the sensitivity of the second amplifier according to a preset adjustment parameter to adjust the second amplification factor, determine a new processing voltage based on the adjusted second amplification factor, and determine the magnitude relationship between the new processing voltage and the first voltage threshold. If the new processing voltage is greater than or equal to the first voltage threshold, the sensitivity of the second amplifier is further increased according to the preset adjustment parameter until the new processing voltage is less than the first voltage threshold; if the new processing voltage is less than the first voltage threshold, the sensitivity of the first amplifier is further increased according to the adjustment parameter to adjust the first amplification factor, determine a new processing voltage based on the adjusted first amplification factor, and determine the magnitude relationship between the new processing voltage and the first voltage threshold. If the new processing voltage is less than the first voltage threshold, the sensitivity of the first amplifier is further increased according to the adjustment parameter until the new processing voltage is not less than the first voltage threshold; if the new processing voltage is not less than the first voltage threshold, the sensitivity of the first amplifier is further decreased according to the adjustment parameter, and it is determined that the first and second amplification factors have been successfully adjusted.

[0099] Optionally, the first amplification factor K1 and the second amplification factor can be calculated respectively by using the sensitivity D1 of the first amplifier and the sensitivity D2 of the second amplifier.

[0100] In one possible implementation, K1 and K2 can be calculated using the following formulas: K1=(2529.28 / (1024-D1)+1, K2=(2529.28 / (1024-D2)+1.

[0101] Optionally, in order to make the processing voltage as small as possible, the first voltage threshold may be 0V.

[0102] Optionally, the preset adjustment parameter can be set according to actual application conditions. In a possible implementation, the adjustment parameter can be 1.

[0103] In one example, if the processing voltage V1-V2 is greater than or equal to 0, the control module may adjust the sensitivity D2 of the second amplifier to D2+1, re-read the amplified excitation voltage V2, calculate the new V1-V2, and determine whether the new V1-V2 is greater than or equal to 0.

[0104] If the new V1-V2 is still greater than or equal to 0, continue to adjust D2 to D2+1, and so on, until the new V1-V2 is less than 0.

[0105] In this example, if the new V1-V2 is less than 0, the sensitivity D1 of the first amplifier can be adjusted to D1+1, and the amplified detection voltage V1 can be re-read to calculate the new V1-V2 and determine whether the new V1-V2 is less than 0.

[0106] If the new V1-V2 is still less than 0, continue to adjust D1 to D1+1, and so on, until the new V1-V2 is greater than or equal to 0, and if the new V1-V2 is greater than or equal to 0, adjust D1 to D1-1.

[0107] It can be understood that at this time the first magnification and the second magnification are adjusted successfully. In this case, V1-V2 reaches the minimum.

[0108] Next, a possible implementation method is provided for how to adjust the third amplification factor according to the adjusted target voltage and the preset value range.

[0109] Specifically, the upper limit value of the preset value range is a second voltage threshold value, and the lower limit value is a third voltage threshold value. The control module is further used to determine whether the adjusted target voltage is less than the second voltage threshold value; if the adjusted target voltage is not less than the second voltage threshold value, the sensitivity of the third amplifier is increased according to the preset adjustment parameter to adjust the third amplification factor, a new target voltage is determined based on the adjusted third amplification factor, and it is determined whether the new target voltage is less than the second voltage threshold value; if the new target voltage is not less than the second voltage threshold value, the sensitivity of the third amplifier is continued to be increased according to the preset adjustment parameter until the new target voltage is less than the second voltage threshold value; If the new target voltage is less than the second voltage threshold, determine whether the new target voltage is greater than the third voltage threshold; if the new target voltage is not greater than the third voltage threshold, lower the sensitivity of the third amplifier according to the preset adjustment parameter to adjust the third amplification factor, determine the new target voltage based on the adjusted third amplification factor, and determine whether the new target voltage is greater than the third voltage threshold; if the new target voltage is not greater than the third voltage threshold, continue to lower the sensitivity of the third amplifier according to the preset adjustment parameter until the new target voltage is greater than the third voltage threshold; if the new target voltage is greater than the third voltage threshold, determine that the third amplification factor adjustment is successful.

[0110] Optionally, the third amplification factor K3 can be calculated using the sensitivity D3 of the third amplifier.

[0111] In one possible implementation, K3 can be calculated using the following formula: K3=(2560 / (1024-D3)+1.

[0112] Optionally, the second voltage threshold and the third voltage threshold may be set according to actual application conditions. In one possible implementation, the second voltage threshold may be -2V, and the third voltage threshold may be -4V.

[0113] Optionally, the preset adjustment parameter can be set according to actual application conditions. In a possible implementation, the adjustment parameter can be 1.

[0114] In one example, after adjusting K1 and K2, the target voltage V3 will obviously change. In this case, the control module can first obtain the target voltage V3 and determine whether V3 is less than -2V. If V3 is not less than -2V, D3 can be adjusted to D3+1, and the new V3 can be read again to determine whether the new V3 is less than -2V. If the new V3 is still not less than -2V, D3 can be further adjusted to D3+1, and so on, until the new V3 is less than -2V.

[0115] In this example, if the new V3 is less than -2V, the control module can determine whether the new V3 is greater than -4V. If the new V3 is not greater than -4V, D3 can be adjusted to D3-1 and the new V3 can be read to determine whether the new V3 is greater than -4V.

[0116] If the new V3 is still not greater than -4V, then D3 can be adjusted to D3-1, and so on, until the new V3 is greater than -4V.

[0117] If the new V3 is greater than -4V, it can be determined that the K3 adjustment is completed, and V3 is now in the range of -2V~-4V.

[0118] In this example, when the third amplification factor is successfully adjusted, the product K of the adjusted K1 and K3 can be calculated, and it can be determined whether K is greater than the minimum amplification factor Kmin. If K is not greater than Kmin, D2 can be readjusted to D2+1, and the amplified excitation voltage V2 can be re-read, the new V1-V2 is calculated, and it can be determined whether the new V1-V2 is greater than or equal to 0, thereby starting a new round of adjustment.

[0119] The present application also provides a slag detection method, which is applied to the above-mentioned slag detection system. Specifically, Figure 6 A schematic diagram of a slag detection method provided in an embodiment of the present application is shown in FIG. Figure 6 , the method comprising:

[0120] In step S20, the detection module performs electromagnetic induction on the molten steel to obtain a detection voltage.

[0121] In step S21 , the amplification module performs anti-interference processing and amplification processing on the detection voltage sent by the detection module according to the excitation voltage sent by the power module to obtain a target voltage.

[0122] Step S22: The control module performs slag detection on the target voltage sent by the amplification module.

[0123] In the slag detection method provided in the embodiments of the present application, a detection module can perform electromagnetic induction on molten steel to obtain a detection voltage. An amplification module can perform anti-interference processing and amplification on the detection voltage sent by the detection module based on the excitation voltage sent by the power supply module to obtain a target voltage. Based on this, the control module can perform slag detection based on the target voltage sent by the amplification module. Because the amplification module can perform anti-interference processing on the detection voltage based on the excitation voltage, fluctuations in the detection voltage caused by fluctuations in the power supply's excitation current can be eliminated, thereby ensuring the accuracy of the detection voltage and improving the accuracy of slag detection.

[0124] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A slag detection system, characterized in that: It includes a detection module, an amplification module, a power supply module and a control module, wherein the detection module is electrically connected to the amplification module, the power supply module is electrically connected to the detection module and the amplification module respectively, and the amplification module is also communicatively connected to the control module; The power supply module is used to supply power to the detection module and send an excitation voltage to the amplification module; The detection module is used to perform electromagnetic induction on the molten steel to obtain a detection voltage; The amplification module is used to perform anti-interference processing and amplification processing on the detection voltage sent by the detection module according to the excitation voltage sent by the power supply module to obtain a target voltage; The amplification module is further configured to amplify the detection voltage according to a first amplification factor and the excitation voltage according to a second amplification factor, respectively, and to obtain a processing voltage by subtracting the amplified detection voltage from the amplified excitation voltage, and to obtain the target voltage by amplifying the processing voltage according to a third amplification factor. The control module is used to perform slag detection on the target voltage sent by the amplification module; The control module is also used to obtain the ladle weight of the ladle equipment for pouring molten steel. When the ladle weight is less than a preset weight, the first amplification factor and the second amplification factor are adjusted according to the processing voltage and the target voltage to make the processing voltage as small as possible, and then the third amplification factor is adjusted so that the product of the adjusted third amplification factor and the adjusted first amplification factor is greater than the minimum amplification factor.

2. The slag detection system according to claim 1, characterized in that: The amplification module includes a first amplifier, a second amplifier, and a third amplifier, wherein the first amplifier is electrically connected to the detection module, the second amplifier is electrically connected to the detection module and the power supply module respectively, and the third amplifier is electrically connected to the first amplifier and the second amplifier respectively, and is in communication with the control module; The first amplifier is used to obtain the detection voltage and amplify the detection voltage according to the first amplification factor; The second amplifier is used to obtain the excitation voltage and amplify the excitation voltage according to the second amplification factor; The third amplifier is used to obtain a processing voltage by taking the difference between the amplified excitation voltage and the amplified detection voltage, and to amplify the processing voltage according to the third amplification factor to obtain the target voltage.

3. The slag detection system according to claim 1, characterized in that: The control module is further configured to adjust the first amplification factor and the second amplification factor according to a magnitude relationship between the processing voltage and a preset first voltage threshold, and obtain an adjusted target voltage after the first amplification factor and the second amplification factor are successfully adjusted; adjusting the third amplification factor according to the adjusted target voltage and a preset value range, and after the third amplification factor is successfully adjusted, determining whether a product of the adjusted third amplification factor and the adjusted first amplification factor is greater than a preset minimum amplification factor; If the product of the adjusted third magnification and the adjusted first magnification is less than or equal to a preset minimum magnification, re-performing the step of adjusting the first magnification and the second magnification until the product of the adjusted third magnification and the adjusted first magnification is greater than the minimum magnification; When the product of the adjusted third magnification and the adjusted first magnification is greater than the minimum magnification, it is determined that the first magnification, the second magnification and the third magnification are adjusted successfully, the adjusted target voltage is obtained, and slag detection is performed according to the adjusted target voltage.

4. The slag detection system according to claim 3, characterized in that: The control module is further configured to, when the processing voltage is greater than or equal to a preset first voltage threshold, increase the sensitivity of the second amplifier according to a preset adjustment parameter to adjust the second amplification factor, determine a new processing voltage based on the adjusted second amplification factor, and determine a magnitude relationship between the new processing voltage and the first voltage threshold; If the new processing voltage is greater than or equal to the first voltage threshold, continue to increase the sensitivity of the second amplifier according to the preset adjustment parameter until the new processing voltage is less than the first voltage threshold; If the new processing voltage is less than the first voltage threshold, increasing the sensitivity of the first amplifier according to the adjustment parameter to adjust the first amplification factor, determining a new processing voltage based on the adjusted first amplification factor, and determining a magnitude relationship between the new processing voltage and the first voltage threshold; If the new processing voltage is less than the first voltage threshold, continue to increase the sensitivity of the first amplifier according to the adjustment parameter until the new processing voltage is not less than the first voltage threshold; If the new processing voltage is not less than the first voltage threshold, the sensitivity of the first amplifier is lowered according to the adjustment parameter, and it is determined that the first amplification factor and the second amplification factor are adjusted successfully.

5. The slag detection system according to claim 3, characterized in that: The upper limit of the preset value range is a second voltage threshold, and the lower limit is a third voltage threshold; the control module is further used to determine whether the adjusted target voltage is less than the second voltage threshold; If the adjusted target voltage is not less than the second voltage threshold, increasing the sensitivity of the third amplifier according to a preset adjustment parameter to adjust the third amplification factor, determining a new target voltage based on the adjusted third amplification factor, and determining whether the new target voltage is less than the second voltage threshold; If the new target voltage is not less than the second voltage threshold, continue to increase the sensitivity of the third amplifier according to the preset adjustment parameter until the new target voltage is less than the second voltage threshold; If the new target voltage is less than the second voltage threshold, determining whether the new target voltage is greater than a third voltage threshold; If the new target voltage is not greater than the third voltage threshold, lowering the sensitivity of the third amplifier according to a preset adjustment parameter to adjust the third amplification factor, determining a new target voltage based on the adjusted third amplification factor, and determining whether the new target voltage is greater than the third voltage threshold; If the new target voltage is not greater than the third voltage threshold, continuing to reduce the sensitivity of the third amplifier according to the preset adjustment parameter until the new target voltage is greater than the third voltage threshold; If the new target voltage is greater than the third voltage threshold, it is determined that the third amplification factor is adjusted successfully.

6. The slag detection system according to claim 1, characterized in that: The slag detection system further includes a PLC, which is in communication with the control module; The PLC is used to obtain the slag detection result sent by the control module and perform slag amount analysis based on the slag detection result.

7. The slag detection system according to claim 6, characterized in that: The slag detection system further includes an operation module, which is communicatively connected to the PLC; The operation module is used to receive the slag analysis result sent by the PLC and display the slag analysis result.

8. A slag detection method, characterized in that: The method is applied to a slag detection system, which includes a detection module, an amplification module, a power module, and a control module. The detection module is electrically connected to the amplification module, the power module is electrically connected to the detection module and the amplification module respectively, and the amplification module is also communicatively connected to the control module. The power module is used to power the detection module and send an excitation voltage to the amplification module. The method includes: The detection module performs electromagnetic induction on the molten steel to obtain a detection voltage; The amplification module performs anti-interference processing and amplification processing on the detection voltage sent by the detection module according to the excitation voltage sent by the power supply module to obtain a target voltage; The amplification module amplifies the detection voltage according to a first amplification factor and amplifies the excitation voltage according to a second amplification factor, and subtracts the amplified detection voltage from the amplified excitation voltage to obtain a processing voltage, and amplifies the processing voltage according to a third amplification factor to obtain the target voltage; The control module performs slag detection on the target voltage sent by the amplification module; The control module obtains the ladle weight of the ladle equipment for pouring molten steel. When the ladle weight is less than a preset weight, the first amplification factor and the second amplification factor are adjusted according to the processing voltage and the target voltage to make the processing voltage as small as possible, and then the third amplification factor is adjusted so that the product of the adjusted third amplification factor and the adjusted first amplification factor is greater than the minimum amplification factor.

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