CN120427726A - Slag discharging detection system and method - Google Patents
Slag discharging detection system and methodInfo
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Abstract
本申请实施例提出一种下渣检测系统和方法，涉及铸造技术领域。检测模块与放大模块电连接，电源模块分别与检测模块和放大模块电连接，放大模块还与控制模块通信连接；电源模块用于为检测模块供电以及向放大模块发送励磁电压；检测模块用于对钢水进行电磁感应，获得检测电压；放大模块用于根据电源模块发送的励磁电压对检测模块发送的检测电压进行防干扰处理和放大处理，获得目标电压；控制模块用于对放大模块发送的目标电压进行下渣检测。由于放大模块可基于励磁电压对检测电压进行防干扰处理，因此可消除电源的励磁电流的波动造成的检测电压的波动，从而保证检测电压的精确性，进而提高下渣检测精度。
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
The application relates to the technical field of casting, in particular to a slag discharging detection system and method.
Background
With the continuous development of the technology of iron and steel enterprises in China, the requirements on the detection precision and the automation degree of intelligent manufacturing equipment are higher and higher. At present, in the continuous casting ladle casting process, the ladle slag discharge detection is needed to improve the product quality and the molten steel yield, reduce the labor intensity of staff and reduce the equipment reconstruction and maintenance cost.
However, in the related art, there is a case where the detection accuracy is low when the slag is detected.
Disclosure of Invention
Accordingly, the present application is directed to a slag detection system and method for improving the slag detection accuracy.
In order to achieve the above object, the technical scheme adopted by the embodiment of the application is as follows:
In a first aspect, the application provides a slag detection system, which comprises a detection module, an amplification module, a power module and a control module, wherein the detection module is electrically connected with the amplification module, the power module is respectively electrically connected with the detection module and the amplification module, and the amplification module is also in communication connection with the control module;
the power supply module is used for supplying power to the detection module and sending exciting voltage to the amplification module;
The detection module is used for carrying out electromagnetic induction on molten steel to obtain detection voltage;
the amplifying module is used for carrying out anti-interference processing and amplifying 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 is used for detecting slag discharging of the target voltage sent by the amplifying module.
In an optional implementation manner, the amplifying module is further configured to amplify the detection voltage according to a first amplification factor and amplify the excitation voltage according to a second amplification factor, perform anti-interference processing on the amplified detection voltage according to the amplified excitation voltage, obtain a processing voltage, and amplify the processing voltage according to a third amplification factor, so as to obtain the target voltage.
In an alternative embodiment, the amplifying module includes a first amplifier, a second amplifier and a third amplifier, the first amplifier is electrically connected to the detecting module, the second amplifier is electrically connected to the detecting module and the power module, respectively, and the third amplifier is electrically connected to the first amplifier and the second amplifier, respectively, and is communicatively connected to the control module;
the first amplifier is used for acquiring the detection voltage and amplifying the detection voltage according to the first amplification factor;
the second amplifier is used for acquiring the exciting voltage and amplifying the exciting voltage according to the second amplification factor;
The third amplifier is used for obtaining a processing voltage by performing difference on the amplified exciting voltage and the amplified detection voltage, and amplifying the processing voltage according to the third amplification factor to obtain the target voltage.
In an alternative embodiment, the control module is further configured to obtain a ladle weight of a ladle apparatus for pouring molten steel, and adjust the first amplification factor, the second amplification factor, and the third amplification factor according to the processing voltage and the target voltage when the ladle weight is less than a preset weight.
In an optional embodiment, the control module is further configured to adjust the first amplification factor and the second amplification factor according to a magnitude relation 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;
the third amplification factor is adjusted according to the adjusted target voltage and a preset value range, and after the third amplification factor is successfully adjusted, whether the product of the adjusted third amplification factor and the adjusted first amplification factor is larger than a preset minimum amplification factor or not is determined;
The step of adjusting the first magnification and the second magnification is re-executed under the condition that the product of the adjusted third magnification and the adjusted first magnification is smaller than or equal to a preset minimum magnification until the product of the adjusted third magnification and the adjusted first magnification is larger than the minimum magnification;
And under the condition that the product of the adjusted third amplification factor and the adjusted first amplification factor is larger than the minimum amplification factor, determining that the first amplification factor, the second amplification factor and the third amplification factor are successfully adjusted, acquiring an adjusted target voltage, and detecting slag according to the adjusted target voltage.
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, adjust the sensitivity of the second amplifier according to a preset adjustment parameter, so as to adjust the second amplification factor, determine a new processing voltage according to the adjusted second amplification factor, and determine a magnitude relation 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, continuing to upwardly adjust the sensitivity of the second amplifier according to a preset adjustment parameter until the new processing voltage is less than the first voltage threshold;
If the new processing voltage is smaller than the first voltage threshold, the sensitivity of the first amplifier is adjusted according to the adjustment parameter so as to adjust the first amplification factor, the new processing voltage is determined according to the adjusted first amplification factor, and the magnitude relation between the new processing voltage and the first voltage threshold is determined;
if the new processing voltage is smaller than the first voltage threshold, continuing to upwardly adjust the sensitivity of the first amplifier according to the adjustment parameter until the new processing voltage is not smaller than the first voltage threshold;
And if the new processing voltage is not smaller than the first voltage threshold, the sensitivity of the first amplifier is adjusted downwards according to the adjustment parameter, and the first amplification factor and the second amplification factor are determined to be successfully adjusted.
In an alternative embodiment, 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;
If the adjusted target voltage is not smaller than the second voltage threshold, the sensitivity of the third amplifier is adjusted upwards according to preset adjustment parameters so as to adjust the third amplification factor, a new target voltage is determined according to the adjusted third amplification factor, and whether the new target voltage is smaller than the second voltage threshold is determined;
if the new target voltage is not smaller than the second voltage threshold, continuing to upwardly adjust the sensitivity of the third amplifier according to a preset adjustment parameter until the new target voltage is smaller 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 a third voltage threshold, the sensitivity of the third amplifier is adjusted downwards according to a preset adjustment parameter so as to adjust the third amplification factor, the new target voltage is determined according to the adjusted third amplification factor, and whether the new target voltage is greater than the third voltage threshold is determined;
If the new target voltage is not greater than the third voltage threshold, continuing to downwards adjust the sensitivity of the third amplifier according to a preset adjustment parameter until the new target voltage is greater than the third voltage threshold;
And if the new target voltage is larger than the third voltage threshold value, determining that the third amplification factor adjustment is successful.
In an alternative embodiment, the slag detection system further comprises a PLC, and the PLC is in communication connection with the control module;
The PLC is used for acquiring the slag discharging detection result sent by the control module and analyzing the slag quantity according to the slag discharging detection result.
In an alternative embodiment, the slag detection system further comprises an operation module, and the operation module is in communication connection with the PLC;
The operation module is used for receiving the slag quantity analysis result sent by the PLC and displaying the slag quantity analysis result.
In a second aspect, the present application provides a method for detecting slag, applied to a slag detection system, where the slag detection system includes a detection module, an amplifying module, a power module and a control module, the detection module is electrically connected with the amplifying module, the power module is electrically connected with the detection module and the amplifying module respectively, the amplifying module is further communicatively connected with the control module, and the power module is used for supplying power to the detection module and sending excitation voltage to the amplifying module, and the method includes:
the detection module performs electromagnetic induction on molten steel to obtain detection voltage;
The amplifying module performs anti-interference processing and amplifying 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;
and the control module detects slag discharging of the target voltage sent by the amplifying module.
According to the slag discharging detection system and method provided by the embodiment of the application, the detection module can perform electromagnetic induction on molten steel to obtain detection voltage, the amplification module can perform anti-interference treatment and amplification treatment on the detection voltage sent by the detection module on the excitation voltage sent by the power supply module to obtain target voltage, and on the basis, the control module can perform slag discharging detection on the target voltage sent by the amplification module. Because the amplification module can carry out anti-interference treatment on the detection voltage based on the excitation voltage, the fluctuation of the detection voltage caused by the fluctuation of the excitation current of the power supply can be eliminated, thereby ensuring the accuracy of the detection voltage and further improving the slag discharge detection accuracy.
In order to make the above objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram showing the structure of a ladle slag detection system in the related art;
FIG. 2 is a schematic diagram of a slag detection system according to an embodiment of the present application;
FIG. 3 is a schematic diagram showing another configuration of the slag detection system according to the embodiment of the present application;
FIG. 4 is another block diagram of a slag detection system according to an embodiment of the present application;
FIG. 5 shows an exemplary diagram of an amplification module;
fig. 6 shows a schematic flow chart of a slag detection method according to an embodiment of the present application.
The icons are 1-sensor housing, 2-induction coil, 3-exciting coil, 4-amplifying device, 5-amplifier, 10-detecting module, 20-amplifying module, 30-power module, 40-control module, 50-PLC, 60-operating module.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present application.
It is noted that relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
With the continuous development of the technology of iron and steel enterprises in China, the requirements on the detection precision and the automation degree of intelligent manufacturing equipment are higher and higher. At present, in the continuous casting ladle casting process, the ladle slag discharge detection can be used for improving the product quality and the molten steel yield, reducing the labor intensity of staff and reducing the equipment reconstruction and maintenance cost. Ladle slag detection is a key technology in the steel production process, and is mainly used for monitoring and detecting whether slag (namely steel slag) in molten steel enters a long nozzle or not in a continuous casting process. This process is critical to ensure steel product quality, improve molten steel yield, and reduce equipment maintenance costs.
Ladle refers to a vessel containing high temperature molten steel, typically a large ladle, for transporting molten steel from a steelmaking furnace to a caster for casting. During the pouring of molten steel, some nonmetallic impurities (e.g., oxides, etc.) are entrained in the molten steel, and these impurities are referred to as "slag". When molten steel flows from a ladle into a long nozzle, if slag flows in with the molten steel, serious effects are caused on the quality of the molten steel, such as lowering of purity of steel, influence on steel properties, and the like. Therefore, the slag discharge condition must be detected in real time, so that measures are taken in time to avoid slag entering the continuous casting system, thereby improving the product quality and the molten steel yield.
Fig. 1 is a schematic structural diagram of a ladle slag detection system in the related art, please refer to fig. 1, in the detection system, a sensor may include a sensor housing 1, an induction coil 2 and an excitation coil 3, wherein the sensor housing may provide mechanical support and electromagnetic shielding, ensure that the sensor can stably operate in a high-temperature and high-interference environment, the excitation coil may generate an alternating magnetic field to provide a basic condition for the induction coil, the induction coil may detect a steel slag signal and convert the steel slag signal into an electrical signal, and an amplifying device 4 may amplify an output voltage Vi of the sensor through an amplifier 5, thereby obtaining an output voltage V1, and may amplify a variation amount (slag amount voltage) Δvi of Vi to Δv1 in the amplifying process.
In the related art, the ladle slag detection system often adopts exciting current Ib to supply power to the sensor, but is influenced by the characteristics of electronic elements, the exciting current often has certain fluctuation, the fluctuation can lead to synchronous fluctuation of output voltage Vi of the sensor, and the fluctuation can be amplified by a single-stage amplifier and added into final target voltage. Therefore, even though the amplifying device can improve the overall strength of the signal, the effective slag amount voltage is still difficult to separate from the complex background signal due to the existence of the interference signal, so that the slag detection precision is low.
Based on the above, the embodiment of the application provides a slag detection system and a slag detection method to solve the above problems.
Specifically, fig. 2 is a schematic structural diagram of a slag detection system provided by an embodiment of the present application, please refer to fig. 2, the slag detection system includes a detection module 10, an amplification module 20, a power module 30 and a control module 40, wherein the detection module 10 is electrically connected with the amplification module 20, the power module 30 is electrically connected with the detection module 10 and the amplification module 20 respectively, and the amplification module 20 is also communicatively connected with the control module 40.
In this embodiment, the power module is configured to supply power to the detection module and send excitation voltage to the amplification module, where the detection module may be configured to perform electromagnetic induction on molten steel to obtain detection voltage, the amplification module may be configured 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 module to obtain target voltage, and the control module may be configured to perform slag tapping detection on the target voltage sent by the amplification module.
Alternatively, the detection module may be a trunnion ring sensor. In the embodiment, the backing ring used on the long nozzle manipulator can be set as a sensor and used as a detection module for slag detection of molten steel.
It can be appreciated that the trunnion ring sensor adopts the electromagnetic induction principle, the induction coil can be made of special high-temperature resistant wires, the packaging shell can be made of non-magnetic high-temperature metal materials, so that the interference to a magnetic field is avoided, and the trunnion ring sensor can be electrically connected with the amplifying module through the outgoing line and the high-temperature cable, does not need to be cooled, and can work in a high-temperature environment for a long time.
In the practical application process, when molten steel passes through the vicinity of the trunnion ring sensor, the induction coil can output a corresponding voltage signal based on the change of the magnetic field, and when slag exists in the molten steel, the change can cause the amplitude of the voltage signal generated in the induction coil to change because the magnetic permeability and the electric conductivity of the slag are different from those of pure molten steel.
Alternatively, to reduce signal attenuation, and avoid introducing unwanted interference, the amplification module may be located near the long nozzle robot, at a small distance from the sensor, e.g. less than 12 meters.
In this embodiment, the amplifying module not only can amplify the detection voltage, but also can perform anti-interference processing on the detection voltage based on the excitation voltage, so that fluctuation of the output voltage of the sensor caused by fluctuation of the excitation current is counteracted, and therefore, the influence of the excitation current on the detection voltage can be eliminated, and the detection accuracy is improved.
Optionally, the power module may be a constant current excitation power supply, so as to provide stable ac excitation current for the sensor, and ensure that the excitation current is not affected by the change of the resistance value of the coil.
According to the slag discharging detection system provided by the embodiment of the application, the detection module can perform electromagnetic induction on molten steel to obtain detection voltage, the amplification module can perform anti-interference treatment and amplification treatment on the detection voltage sent by the detection module on the excitation voltage sent by the power supply module to obtain target voltage, and on the basis, the control module can perform slag discharging detection on the target voltage sent by the amplification module. Because the amplification module can carry out anti-interference treatment on the detection voltage based on the excitation voltage, the fluctuation of the detection voltage caused by the fluctuation of the excitation current of the power supply can be eliminated, thereby ensuring the accuracy of the detection voltage and further improving the slag discharge detection accuracy.
Optionally, on the basis of fig. 2, fig. 3 is a schematic diagram of another structure of the slag detection system provided by the embodiment of the present application, referring to fig. 3, the slag detection system further includes a PLC50, which is communicatively connected to the control module, and the PLC may be configured to obtain a slag detection result sent by the control module, and perform slag analysis according to the slag detection result.
In addition, referring to fig. 3, the slag detection system may further include an operation module 60, where the operation module 60 is communicatively connected to the PLC, and the operation module may be configured to receive the slag amount analysis result sent by the PLC and display the slag amount analysis result.
Optionally, the PLC may perform slag amount analysis, such as curve analysis, whether to alarm, etc., according to the slag detection result, and may further control the control module, such as issuing data processing instructions to the control module according to some operation instructions issued by the user, etc.
Alternatively, the operation module may be used for user field operation and data display to the user. For example, the operation module can comprise a display interface, an operation button, an alarm indicator lamp and the like, so that the operation module can display a slag amount curve to enable an operator to know casting conditions in time, give slag amount alarm when the slag amount exceeds a preset slag amount threshold value, acquire an operation instruction issued by a user based on the operation button and send the operation instruction to the PLC and the like.
It can be understood that the PLC is used as a core unit for data processing and is used for acquiring the slag detection result from the control module and analyzing the slag detection result, and the operation module is used as a man-machine interaction interface and is used for displaying the analyzed result of the PLC to a user in a visual mode. Therefore, the design not only improves the automation degree of the system, but also remarkably enhances the convenience and reliability of operation.
With continued reference to fig. 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, where the maximum value of V1 cannot exceed 10V under the influence of the maximum range of the electronic component. In the initial stage of sensor use, the output voltage Vi is generally about 45mV, but as the use time increases, vi gradually increases to about 75 mV. The V1 highest voltage is generally not allowed to exceed 7.5V (7500 mV) in view of the margin used. The amplification setting of a single stage amplifier generally does not exceed 7500/75=100. When the ladle is deslagged, the change (slag amount voltage) DeltaVi of Vi is generally 0.1mV-0.7mV, however, when the inner wall of the water gap is made of more gellan steel, the change DeltaVi of the sensor output voltage Vi is obviously reduced, and is generally less than 0.1mV. The root cause of this phenomenon is that the presence of cold steel changes the magnetic field distribution around the induction coil, thereby weakening the actual effect of slag quantity variations on the induced voltage.
In the execution process of the steps, the amplifying module is required to amplify the detection voltage so as to extract an effective slag quantity voltage signal. However, existing single stage amplifiers typically set up a magnification of typically no more than 100 times. This means that even if the detected voltage Vi is amplified, the variation Δv1 (i.e., the amplified slag amount voltage) is only Δv multiplied by the amplification factor, and when the amount of the cold steel on the inner wall of the nozzle is large, Δv1 is usually smaller than 10mV. Such weak signals are difficult to accurately identify and distinguish in actual detection, and particularly in the presence of noise and other interfering signals, the effective signals are easily overwhelmed.
Clearly, how to optimize the amplification process is also an important issue to be addressed.
In order to solve the problem, the amplifying module may be further configured to amplify the detection voltage according to a first amplification factor and amplify the excitation voltage according to a second amplification factor, perform anti-interference processing on the amplified detection voltage according to the amplified excitation voltage, obtain a processing voltage, and amplify the processing voltage according to a third amplification factor, so as to obtain the target voltage.
Optionally, the first magnification, the second magnification, and the third magnification may be set according to actual application situations.
In this embodiment, the amplifying module may amplify the detection voltage (denoted as Vi) according to a first amplification factor (denoted as K1) to obtain an amplified detection voltage V1, where the expression is v1=k1×vi. The first amplification factor K1 here is used to significantly increase the overall strength of the detected voltage, especially the slag amount voltage variation therein (denoted as Δvi). It will be appreciated that the amount of change in the slag amount voltage (denoted Δv1) after amplification can be expressed as Δv1=k1×Δvi.
In addition, the amplifying module may amplify the exciting voltage (denoted as Vb) according to a second amplification factor (denoted as K2) to obtain an amplified exciting voltage V2, where the expression is v2=k2×vb. It will be appreciated that amplifying the excitation voltage may be used to subsequently cancel out the interference signal introduced by the excitation current fluctuations.
Further, the amplifying module may then perform anti-interference processing on the detected voltage by differentiating the amplified detected voltage V1 and the amplified exciting voltage V2 to obtain a processed voltage (denoted as V1-V2). The purpose of this difference operation is to eliminate the influence of the excitation current fluctuation on the detection voltage. Specifically, since the excitation current fluctuation causes additional interference components in the detection voltage, and the interference components are amplified by the amplifier and added to the output signal, the interference signals can be effectively removed by performing a difference operation, thereby improving the signal-to-noise ratio of the target signal.
The amplifying module may further amplify the processing voltage (V1-V2) according to a third amplification factor (denoted as K3) to obtain a target voltage (denoted as V3), where the expression is v3=k3 (V1-V2). The third amplification factor K3 is used for further improving the strength of the target signal, so as to ensure that the target signal can meet the requirement of subsequent slag detection. After this amplification process, the amount of change in the slag amount voltage (denoted as Δv3) can be expressed as Δv3=k3×Δv1=k3×k1×Δvi. It follows that the magnification K of the final slag amount voltage can be defined as k=k1×k3.
According to the slag discharging detection system provided by the embodiment of the application, the effective intensity of slag quantity signals in detected voltage is obviously improved in a step-by-step amplification and difference processing mode, meanwhile, the influence of interference signals is effectively inhibited, and the target voltage (V3) is ensured to accurately reflect the change condition of slag quantity in molten steel, so that reliable data support is provided for subsequent slag discharging detection.
Alternatively, the functions of the amplifying module may be cooperatively performed by a plurality of amplifiers.
Specifically, fig. 4 is another schematic block diagram of the slag detection system according to the embodiment of the present application, referring to fig. 4, the amplifying module 20 may include a first amplifier, a second amplifier and a third amplifier, where the first amplifier is electrically connected to the detecting module, the second amplifier is electrically connected to the detecting module and the power module, and the third amplifier is electrically connected to the first amplifier and the second amplifier, and is communicatively connected to the control module.
In this embodiment, the first amplifier may be configured to obtain the detection voltage, amplify the detection voltage according to a first amplification factor, the second amplifier may be configured to obtain the excitation voltage, amplify the excitation voltage according to a second amplification factor, and the third amplifier may be configured to obtain the processing voltage by subtracting the amplified excitation voltage from the amplified detection voltage, and amplify the processing voltage according to a third amplification factor to obtain the target voltage.
In one possible implementation, fig. 5 is an exemplary diagram of an amplifying module, referring to fig. 5, the first amplifier A1 may obtain the detection voltage Vi from the detecting module, and amplify the detection voltage Vi according to the first amplification factor K1 to obtain an amplified detection voltage V1. The second amplifier A2 may acquire the excitation voltage Vb from the detection module and the power supply module, and amplify the excitation voltage Vb according to the second amplification factor K2 to obtain an amplified excitation voltage V2. The third amplifier A3 may perform a difference between the amplified detection voltage V1 and the amplified excitation voltage V2 to obtain a processing voltage (V1-V2), and further amplify the processing voltage according to a third amplification factor K3 to obtain a target voltage V3.
Alternatively, the first magnification, the second magnification, and the third magnification may be set to default values in the initial case. Considering that the detection voltage will change along with the change of the temperature and the service life of the water gap area, the first amplification factor, the second amplification factor and the third amplification factor are not invariable, and based on this, the control module needs to dynamically adjust the first amplification factor, the second amplification factor and the third amplification factor according to the actual working condition before the slag discharging system formally starts to perform slag discharging detection.
Specifically, the control module may be further configured to obtain a bale weight of the bale apparatus for pouring molten steel, and adjust the first amplification factor, the second amplification factor, and the third amplification factor according to the processing voltage and the target voltage when the bale weight is less than a preset weight. Optionally, when the weight of the ladle is smaller than the preset weight, the condition that the slag possibly enters the continuous casting system along with the steel flow can be characterized that the slag is likely to appear, so that the amplification factor needs to be adjusted firstly, so that the amplification factor is suitable for specific slag discharge detection, and the system failure caused by the fact that the target voltage in the slag discharge detection process does not exceed the measuring range is ensured. Alternatively, the preset weight may be set according to the actual application, which is not limited in the present application.
In one possible implementation manner, the control module may adjust the first amplification factor and the second amplification factor first, so that the processing voltage is as small as possible, and then adjust the third amplification factor, so that the target voltage is within a preset value range, thereby ensuring that the value of the target voltage does not exceed the maximum range when the slag is started. In this embodiment, the control module may be further configured to adjust the first amplification factor and the second amplification factor according to a magnitude relation between the processing voltage and a preset first voltage threshold, obtain an adjusted target voltage after the first amplification factor and the second amplification factor are adjusted successfully, adjust the third amplification factor according to the adjusted target voltage and a preset value range, and determine whether a product of the adjusted third amplification factor and the adjusted first amplification factor is greater than a preset minimum amplification factor after the third amplification factor is adjusted successfully.
And under the condition that the product of the adjusted third amplification factor and the adjusted first amplification factor is smaller than or equal to a preset minimum amplification factor, the step of adjusting the first amplification factor and the second amplification factor is re-executed until the product of the adjusted third amplification factor and the adjusted first amplification factor is larger than the minimum amplification factor, under the condition that the product of the adjusted third amplification factor and the adjusted first amplification factor is larger than the minimum amplification factor, the first amplification factor, the second amplification factor and the third amplification factor are successfully adjusted, the adjusted target voltage is obtained, and slag discharging detection is carried out according to the adjusted target voltage.
Alternatively, in order to ensure that the target voltage does not exceed the span limit of the amplifying circuit, it is necessary to first ensure that the process voltage is as small as possible while the slag amount voltage remains unchanged, at which time the target voltage does not exceed the span limit even though the third amplification factor is large.
For example, if the first amplification factor k1=100 can ensure that the amplified detection voltage V1 does not exceed the range limit of the circuit±10v, the amplified excitation voltage V2 can be sufficiently close to V1, so as to ensure that the processing voltage V1-V2 is sufficiently small but the slag amount voltage Δv1 is unchanged, at this time, if the third amplification factor k3=100, the target voltage V3 can also be ensured not to exceed the range limit of the circuit±10v, and the amplification factor k=k1×k3=100×100=10000 of the final slag amount voltage Δv3 can be improved by 100 times compared with the amplification factor in the related art.
Optionally, after the first amplification factor and the second amplification factor are adjusted, the third amplification factor needs to be adjusted according to the target voltage, so that the range of the target voltage is ensured to be within a preset value range before the slag discharge detection is formally activated, and the target voltage is ensured not to exceed the range limit even if the ladle starts slag discharge.
For example, the preset value range may be-2V to-4V, and since the highest voltage of the amplifier is not allowed to exceed 7.5V, if the target voltage is-2V to-4V before the slag is removed, the maximum allowable amplitude of V3 is 7.5V- (-2.0) =9.5V when the slag removal of the big ladle starts, so that V3 does not exceed the range limit even if the slag removal of the big ladle starts.
In addition, in order to ensure that the overall amplifying capability of the slag detection system can meet the detection requirement, and avoid signal distortion or detection failure caused by 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 a preset minimum amplification factor.
It can be understood that if the product of the adjusted third amplification factor and the adjusted first amplification factor is less than or equal to the minimum amplification factor, it indicates that the current amplification factor combination cannot meet the requirement, and the system needs to re-execute the adjustment steps of the first amplification factor and the second amplification factor until the product of the adjusted third amplification factor and the adjusted first amplification factor is greater than the preset minimum amplification factor.
It will be appreciated that if the adjustment of the first magnification and the second magnification is successful based on the processing voltage, the adjustment of the third magnification is successful based on the target voltage, and the third magnification is greater than the minimum magnification, then the adjustment of the first magnification, the second magnification, and the third magnification is successful may be determined. Next, one possible implementation is provided for how to adjust the first amplification factor and the second amplification factor according to the magnitude relation between the processing voltage and the preset first voltage threshold.
Specifically, the control module is further configured to adjust the second amplification factor by adjusting the sensitivity of the second amplifier according to a preset adjustment parameter when the processing voltage is greater than or equal to a preset first voltage threshold, determine a new processing voltage according to the adjusted second amplification factor, and determine a magnitude relation between the new processing voltage and the first voltage threshold. If the new processing voltage is smaller than the first voltage threshold, the sensitivity of the first amplifier is up-regulated according to the adjustment parameter to adjust the first amplification factor, the new processing voltage is determined according to the adjusted first amplification factor, and the magnitude relation between the new processing voltage and the first voltage threshold is determined. If the new processing voltage is not less than the first voltage threshold, the sensitivity of the first amplifier is adjusted downwards according to the adjustment parameters, and the first amplification factor and the second amplification factor are determined to be successfully adjusted.
Alternatively, the first amplification factor K1 and the second amplification factor may be calculated by the sensitivity D1 of the first amplifier and the sensitivity D2 of the second amplifier, respectively.
In one possible implementation, K1 and K2 may be calculated by the following formulas K1= (2529.28/(1024-D1) +1, K2= (2529.28/(1024-D2) +1, respectively.
Alternatively, the first voltage threshold may be 0V in order to make the processing voltage as small as possible.
Optionally, the preset adjustment parameter may be set according to an actual application situation. In one possible implementation, the adjustment parameter may be 1.
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 and re-read the amplified excitation voltage V2, calculate a new V1-V2, and determine whether the new V1-V2 is greater than or equal to 0.
If the new V1-V2 is still greater than or equal to 0, continuing to adjust D2 to D2+1, and pushing the same until the new V1-V2 is less than 0.
In this example, if the new V1-V2 is smaller than 0, the sensitivity D1 of the first amplifier may be adjusted to d1+1, and the amplified detection voltage V1 may be read again, and the new V1-V2 may be calculated, and whether the new V1-V2 is smaller than 0 may be determined.
If the new V1-V2 is still smaller than 0, continuing to adjust D1 to D1+1, and pushing the same until the new V1-V2 is larger than or equal to 0, and adjusting D1 to D1-1 when the new V1-V2 is larger than or equal to 0.
It will be appreciated that the first and second magnification adjustments are successful at this point, in which case V1-V2 is minimized.
Next, a possible implementation is provided for how to adjust the third amplification factor according to the adjusted target voltage and the preset value range.
The control module is further used for determining whether the regulated target voltage is smaller than the second voltage threshold or not, if the regulated target voltage is not smaller than the second voltage threshold, the sensitivity of the third amplifier is adjusted up according to preset regulating parameters to regulate the third amplification factor, new target voltage is determined according to the regulated third amplification factor, whether the new target voltage is smaller than the second voltage threshold or not is determined, if the new target voltage is not smaller than the second voltage threshold, the sensitivity of the third amplifier is continuously adjusted up according to the preset regulating parameters until the new target voltage is smaller than the second voltage threshold, if the new target voltage is smaller than the second voltage threshold, whether the new target voltage is larger than the third voltage threshold or not is determined, if the new target voltage is not larger than the third voltage threshold, the sensitivity of the third amplifier is adjusted down according to the preset regulating parameters, the new amplification factor is regulated to the third amplification factor, if the new target voltage is not larger than the third voltage, and if the new target voltage is not larger than the third voltage, the new target voltage is continuously regulated until the new target voltage is not larger than the third voltage.
Alternatively, the third amplification factor K3 may be calculated by the sensitivity D3 of the third amplifier.
In one possible implementation, K3 may be calculated by the formula K3= (2560/(1024-D3) +1.
Alternatively, the second voltage threshold and the third voltage threshold may be set according to practical application, and in one possible implementation manner, the second voltage threshold may be-2V, and the third voltage threshold may be-4V.
Optionally, the preset adjustment parameter may be set according to an actual application situation. In one possible implementation, the adjustment parameter may be 1.
In one example, after K1 and K2 are adjusted, the target voltage V3 is obviously changed, at this time, the control module may first obtain the target voltage V3, determine whether V3 is smaller than-2V, if V3 is not smaller than-2V, adjust D3 to D3+1, and re-read the new V3, and determine whether the new V3 is smaller than-2V. If the new V3 is still not less than-2V, D3 may continue to be adjusted to D3+1, and so on, until the new V3 is less than-2V.
In this example, if the new V3 is less than-2V, the control module may determine whether the new V3 is greater than-4V, if the new V3 is not greater than-4V, then D3 may be adjusted to D3-1, and the new V3 may be read to determine whether the new V3 is greater than-4V.
If the new V3 is still not greater than-4V, D3 may continue to be adjusted to D3-1, and so on, until the new V3 is greater than-4V.
If the new V3 is larger than-4V, the K3 adjustment is determined to be finished, and the V3 is in the range of-2V to-4V.
In this example, after the third amplification adjustment is successful, the product K of K1 and K3 after the adjustment may be calculated, and it may be determined whether K is greater than the minimum amplification Kmin, if K is not greater than Kmin, D2 may be adjusted again, D2 may be adjusted to d2+1, and the amplified excitation voltage V2 may be read again, and a new V1-V2 may be calculated, and it may be determined whether the new V1-V2 is greater than or equal to 0, thereby starting a new round of adjustment.
The embodiment of the application also provides a slag detection method applied to the slag detection system, specifically, fig. 6 is a schematic flow chart of the slag detection method provided by the embodiment of the application, please refer to fig. 6, the method includes:
step S20, the detection module performs electromagnetic induction on the molten steel to obtain detection voltage.
And S21, the amplifying module performs anti-interference processing and amplifying 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.
Step S22, the control module detects slag discharging of the target voltage sent by the amplifying module.
According to the slag discharging detection method provided by the embodiment of the application, the detection module can carry out electromagnetic induction on molten steel to obtain detection voltage, the amplification module can carry out anti-interference treatment and amplification treatment on the detection voltage sent by the detection module on the excitation voltage sent by the power supply module to obtain target voltage, and on the basis, the control module can carry out slag discharging detection on the target voltage sent by the amplification module. Because the amplification module can carry out anti-interference treatment on the detection voltage based on the excitation voltage, the fluctuation of the detection voltage caused by the fluctuation of the excitation current of the power supply can be eliminated, thereby ensuring the accuracy of the detection voltage and further improving the slag discharge detection accuracy.
The above is only a preferred embodiment of the present application, and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. The slag discharging detection system is characterized by comprising a detection module, an amplification module, a power supply module and a control module, wherein the detection module is electrically connected with the amplification module, the power supply module is respectively electrically connected with the detection module and the amplification module, and the amplification module is also in communication connection with the control module;
the power supply module is used for supplying power to the detection module and sending exciting voltage to the amplification module;
The detection module is used for carrying out electromagnetic induction on molten steel to obtain detection voltage;
the amplifying module is used for carrying out anti-interference processing and amplifying 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 is used for detecting slag discharging of the target voltage sent by the amplifying module.
2. The slag detection system of claim 1, wherein the amplification module is further configured to amplify the detection voltage by a first amplification factor and amplify the excitation voltage by a second amplification factor, and perform anti-interference processing on the amplified detection voltage according to the amplified excitation voltage, to obtain a processing voltage, and amplify the processing voltage by a third amplification factor, to obtain the target voltage.
3. The slag detection system of claim 2, wherein the amplification module includes a first amplifier, a second amplifier, and a third amplifier, the first amplifier being electrically connected to the detection module, the second amplifier being electrically connected to the detection module and the power module, respectively, the third amplifier being electrically connected to the first amplifier and the second amplifier, respectively, and being communicatively connected to the control module;
the first amplifier is used for acquiring the detection voltage and amplifying the detection voltage according to the first amplification factor;
the second amplifier is used for acquiring the exciting voltage and amplifying the exciting voltage according to the second amplification factor;
The third amplifier is used for obtaining a processing voltage by performing difference on the amplified exciting voltage and the amplified detection voltage, and amplifying the processing voltage according to the third amplification factor to obtain the target voltage.
4. The slag detection system of claim 2, wherein the control module is further configured to obtain a ladle weight of a ladle apparatus for pouring molten steel, and adjust the first magnification, the second magnification, and the third magnification based on the treatment voltage and the target voltage if the ladle weight is less than a preset weight.
5. The slag detection system of claim 4, wherein the control module is further configured to adjust the first amplification factor and the second amplification factor according to a magnitude relation 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;
the third amplification factor is adjusted according to the adjusted target voltage and a preset value range, and after the third amplification factor is successfully adjusted, whether the product of the adjusted third amplification factor and the adjusted first amplification factor is larger than a preset minimum amplification factor or not is determined;
The step of adjusting the first magnification and the second magnification is re-executed under the condition that the product of the adjusted third magnification and the adjusted first magnification is smaller than or equal to a preset minimum magnification until the product of the adjusted third magnification and the adjusted first magnification is larger than the minimum magnification;
And under the condition that the product of the adjusted third amplification factor and the adjusted first amplification factor is larger than the minimum amplification factor, determining that the first amplification factor, the second amplification factor and the third amplification factor are successfully adjusted, acquiring an adjusted target voltage, and detecting slag according to the adjusted target voltage.
6. The slag detection system of claim 5, wherein the control module is further configured to adjust the second amplification factor by adjusting the sensitivity of the second amplifier according to a preset adjustment parameter when the processing voltage is greater than or equal to a preset first voltage threshold, determine a new processing voltage according to the adjusted second amplification factor, and determine a magnitude relation 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, continuing to upwardly adjust the sensitivity of the second amplifier according to a preset adjustment parameter until the new processing voltage is less than the first voltage threshold;
If the new processing voltage is smaller than the first voltage threshold, the sensitivity of the first amplifier is adjusted according to the adjustment parameter so as to adjust the first amplification factor, the new processing voltage is determined according to the adjusted first amplification factor, and the magnitude relation between the new processing voltage and the first voltage threshold is determined;
if the new processing voltage is smaller than the first voltage threshold, continuing to upwardly adjust the sensitivity of the first amplifier according to the adjustment parameter until the new processing voltage is not smaller than the first voltage threshold;
And if the new processing voltage is not smaller than the first voltage threshold, the sensitivity of the first amplifier is adjusted downwards according to the adjustment parameter, and the first amplification factor and the second amplification factor are determined to be successfully adjusted.
7. The slag detection system of claim 5, wherein the upper limit of the predetermined range of values is a second voltage threshold and the lower limit is a third voltage threshold;
If the adjusted target voltage is not smaller than the second voltage threshold, the sensitivity of the third amplifier is adjusted upwards according to preset adjustment parameters so as to adjust the third amplification factor, a new target voltage is determined according to the adjusted third amplification factor, and whether the new target voltage is smaller than the second voltage threshold is determined;
if the new target voltage is not smaller than the second voltage threshold, continuing to upwardly adjust the sensitivity of the third amplifier according to a preset adjustment parameter until the new target voltage is smaller 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 a third voltage threshold, the sensitivity of the third amplifier is adjusted downwards according to a preset adjustment parameter so as to adjust the third amplification factor, the new target voltage is determined according to the adjusted third amplification factor, and whether the new target voltage is greater than the third voltage threshold is determined;
If the new target voltage is not greater than the third voltage threshold, continuing to downwards adjust the sensitivity of the third amplifier according to a preset adjustment parameter until the new target voltage is greater than the third voltage threshold;
And if the new target voltage is larger than the third voltage threshold value, determining that the third amplification factor adjustment is successful.
8. The slag detection system of claim 1, further comprising a PLC communicatively coupled to the control module;
The PLC is used for acquiring the slag discharging detection result sent by the control module and analyzing the slag quantity according to the slag discharging detection result.
9. The slag detection system of claim 8, further comprising an operating module in communication with the PLC;
The operation module is used for receiving the slag quantity analysis result sent by the PLC and displaying the slag quantity analysis result.
10. The utility model provides a sediment detecting method, characterized in that is applied to sediment detecting system, sediment detecting system includes detection module, amplification module, power module and control module, detection module with the amplification module electricity is connected, power module respectively with detection module with the amplification module electricity is connected, the amplification module still with control module communication connection, power module is used for the detection module power supply and to the excitation voltage is sent to the amplification module, the method includes:
the detection module performs electromagnetic induction on molten steel to obtain detection voltage;
The amplifying module performs anti-interference processing and amplifying 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;
and the control module detects slag discharging of the target voltage sent by the amplifying module.
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