CN113333481A - On-line detection method and device for hot metal detector state in continuous rolling production line - Google Patents
On-line detection method and device for hot metal detector state in continuous rolling production line Download PDFInfo
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Abstract
The invention provides an online detection method for the state of a hot metal detector in a continuous rolling production line, which comprises the following steps: and acquiring the temperature information of the rolled piece, the detection information of steel detection points at the upstream and downstream of the hot metal detector, the steel signal information and the detection information of the hot metal detector. The detection information of the upstream and downstream steel detection points of the hot metal detector, the steel signal information and the detection information of the hot metal detector are calculated and compared to determine the detection state of the hot metal detector, so that the online real-time judgment of the abnormal detection state of the hot metal detector can be realized, and the technical problem of control function failure caused by abnormal detection state of the hot metal detector is solved. The invention also provides an online detection device, detection equipment and a storage medium.
Description
Technical Field
The application relates to the field of continuous rolling, in particular to an online detection method and device for the state of a hot metal detector in a continuous rolling production line.
Background
In a continuous rolling production line, a hot metal detector is used for detecting whether a rolled piece exists in a hot rolling line or not, is an on-site detection element for realizing rolling line automation, and the switching value output state (0 or 1) of the hot metal detector reflects whether the rolled piece exists or not. Specifically, the hot metal detector is set in advance such that the output is 0 when no rolling stock is detected and 1 when rolling stock is detected. The rolling line automatic system reads the change of the output state (0 or 1) of the rolling line automatic system, tracks the rolled piece (whether the head and the tail of the rolled piece, a certain area have steel and other information), and is used for realizing the control functions of micro-tension, loop, flying shear and the like in the steel rolling process.
Because the hot metal detector is placed on the site, the hot metal detector is inevitably influenced by steam, dust, the temperature of a rolled piece or the position change of the detector, and the output state of the hot metal detector cannot really reflect the state of the rolled piece sometimes, so that the control function of production equipment such as a rolling mill, a loop, a flying shear and the like is invalid, the production interruption is caused, and the production efficiency of a production line is seriously restricted.
Therefore, in order to solve the problems of the prior art, it is urgently needed to invent a method for detecting the state of a hot metal detector in real time in the production process so as to prevent the problems of production interruption and the like caused by the error of the output state of the hot metal detector.
Disclosure of Invention
Aiming at the defects in the prior art, the application aims to provide the on-line detection method and the device for the hot metal detector state in the continuous rolling production line, which can realize the real-time detection of the hot metal detector state in the production process, judge whether the hot metal detector works normally or not, output an alarm when the hot metal detector is detected abnormally, and provide a direction for rapidly and timely eliminating faults. Meanwhile, the abnormal detection result can be automatically used for error correction control of a control system, failure of control functions of equipment such as a rolling mill, a loop, a flying shear and the like is avoided, production is continuous, and loss is reduced.
In a first aspect, the present application provides an online detection method for the state of a hot metal detector in a continuous rolling production line, comprising the following steps:
s1, acquiring preset upstream detection information between an upstream steel detection point and a hot metal detector; the upstream detection information includes: upstream of steel detection point to hot metal detectorDistance L1Rolling speed information V1And the time t calculated from the above required time for the rolled piece to pass through the upstream steel detection point and the hot metal detector1；
S2, acquiring preset downstream detection information between the hot metal detector and a downstream steel detection point; the downstream detection information includes: distance L between hot metal detector and downstream steel detection point2Rolling speed information V2And the time t required for the rolled piece to pass through the hot metal detector and the downstream steel detection point calculated by the calculation2；
S3, acquiring steel signal information of an upstream steel detection point; when the upstream steel detection point detects that a steel signal appears, starting a timer, reading the count value of the timer, and when the count value t of the timer3≥t1Then, acquiring the detection information of the hot metal detector; wherein:
when the hot metal detector detects that a steel signal exists, the state of the hot metal detector is normal, and the detection process is finished;
when the hot metal detector does not detect the steel signal, the state of the hot metal detector is judged to be a fault in advance, and the step S4 is continuously executed;
s4, continuously reading the timer count value when the count value t is reached4≥t1+t2And then, acquiring the steel signal information of the downstream steel detection point:
when a downstream steel detection point detects a steel signal, determining that the state of the hot metal detector is a fault;
and when the downstream steel detection point does not detect a steel signal, judging that the rolling line is in fault, and judging that the state of the hot metal detector is normal.
In a second aspect, the present application provides an online detection device for detecting the state of a hot metal detector in a continuous rolling line, comprising:
a first information acquisition module for acquiring the distance L between the upstream steel detection point and the hot metal detector1；
A second information acquisition module for acquiring the upstream steel detection point to the hot metal detection pointRolling speed information V between sensors1；
A first data processing module for calculating the time t required for the rolled piece to pass through the upstream steel detection point and the hot metal detector1；
A third information acquisition module for acquiring the distance L from the hot metal detector to the downstream steel detection point2；
A fourth information acquisition module for acquiring rolling speed information V from the hot metal detector to a downstream steel detection point2；
A second data processing module for calculating the time t required for the rolled piece to pass through the hot metal detector to the downstream steel detection point2；
The fifth information acquisition module is used for acquiring the steel signal information of the upstream steel detection point;
the first control module starts a timer when the fifth information acquisition module acquires the steel signal;
a first comparison and judgment module for reading the timer count value t3And t1Comparing;
a sixth information acquisition module, when t3≥t1The method is used for acquiring the detection information of the hot metal detector;
the second comparison and judgment module is used for comparing and judging whether the hot metal detector detects a steel signal or not, and when the hot metal detector detects the steel signal, the state of the hot metal detector is normal and the detection process is finished; when the hot metal detector does not detect a steel signal, the state of the hot metal detector is judged to be a fault in advance;
a third comparing and judging module for reading the timer count value t when the state of the hot metal detector is judged to be fault4And t1+t2Comparing;
a seventh information acquisition module, when t4≥t1+t2Then, acquiring the steel signal information of the downstream steel detection point;
the fourth comparison and judgment module is used for determining that the state of the hot metal detector is a fault when a steel signal is detected at a downstream steel detection point; and when the downstream steel detection point does not detect a steel signal, judging that the rolling line is in fault, and judging that the state of the hot metal detector is normal.
In a third aspect, the present application provides an apparatus for online detection of hot metal detector status in a continuous rolling line, comprising:
a memory to store instructions;
a processor for executing the memory-stored instructions and, when executed by the processor, causing the device to perform the aforementioned online detection method.
In a fourth aspect, the present examples provide a computer storage medium storing computer-executable instructions that, when executed by a processor of a computer, cause the computer to perform the aforementioned online detection method.
According to the online detection method for the state of the hot metal detector, the detection information of the upstream detection point and the downstream detection point of the hot metal detector, the steel signal information and the detection information of the hot metal detector are calculated and compared to determine the detection state of the hot metal detector, so that the online real-time judgment on the abnormal detection state of the hot metal detector can be realized, and the technical problem of control function failure caused by abnormal detection state of the hot metal detector is solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a schematic diagram of an online detection method for the hot metal detector status in a continuous rolling line according to an embodiment of the present invention
FIG. 2 is a schematic structural diagram of an on-line detection device according to an embodiment of the present invention
FIG. 3 is a schematic diagram of an alternative online detection method according to an embodiment of the present invention
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In a first aspect, as shown in fig. 1, the present application provides an online detection method for the hot metal detector status in a continuous rolling line, comprising the following steps:
s1, acquiring preset upstream detection information between an upstream steel detection point and a hot metal detector; the method comprises the following steps:
s101, obtaining a distance L between an upstream steel detection point and a hot metal detector1；
S102, obtaining rolling speed information V between an upstream steel detection point and a hot metal detector1；
S103, calculating the time t needed for the rolled piece to pass through the upstream steel detection point and the hot metal detector1；
S2, acquiring preset downstream detection information between the hot metal detector and a downstream steel detection point; the method comprises the following steps:
s201, obtaining a distance L from the hot metal detector to a downstream steel detection point2；
S202, obtaining rolling speed information V from the hot metal detector to a downstream steel detection point2；
S203, calculating the time t required for the rolled piece to pass through the hot metal detector and the downstream steel detection point2；
In the production of rolled steel, L1And L2Is constant, but in producing different product specifications, L is such that some mills may be in idle mode1And L2May also be changedMelting; further, since there is a possibility that a rolling mill is additionally provided between the upstream steel detection point and the downstream steel detection point, V1And V2May also be different, therefore L1、L2、V1And V2The real-time acquisition is needed, and the time t needed by the rolled piece to pass through the distance between the upstream steel detection point and the hot metal detector can be obtained through calculation according to the acquired information1The time t required by the theoretical passing of the hot metal detector and the distance between the downstream steel detection point of the rolled piece2。
S3, predicting the state of the hot metal detector, comprising:
s301, acquiring steel signal information of an upstream steel detection point;
the steel signal information of the upstream steel detection point can be obtained by the change situation of the rolling mill torque at the detection point, or the change situation of the hot metal detector signal arranged at the detection point, and the like. Of course, other detection means known in the art may be used.
S302, starting a timer after an upstream steel detection point detects that a steel signal appears;
preferably, the following actions are also taken when starting the timer:
s303, reading the temperature value T of the rolled piece and the lowest detection temperature value T allowed by the hot metal detector0；
S304, when T is less than T0When the temperature of the rolled piece is low, alarming is carried out;
in the process of steel rolling production operation, when high-quality steel is produced, temperature control rolling is often required, a rolled piece is cooled by cooling water between rolling mills, the surface temperature of the rolled piece is possibly below 600 ℃, namely the surface temperature of the rolled piece is lower than the lowest detection temperature value T allowed by a hot metal detector0(ii) a The hot metal detector cannot detect the rolled piece, the temperature of the rolled piece is low, an alarm is given, the system automatically enters error correction control, relevant operations such as control variable transfer and relevant regulation blockage are carried out, and although the control precision is possibly reduced, accidents caused by regulation failure can be avoided.
S305, when T is more than or equal to T0Reading the timer count value, and when the timer count value t is3≥t1Then, acquiring the detection information of the hot metal detector;
T≥T0the surface temperature of the rolled piece is shown to meet the detection requirement, and under the normal condition, the hot metal detector can detect the surface temperature; t is t3≥t1Indicating that the time counted by the counter at this time is sufficient for the rolled piece to pass the detection point of the hot metal detector.
S306, when the hot metal detector detects that a steel signal exists, the state of the hot metal detector is normal, and the detection process is finished;
at this time, the metal detector detects a steel signal, which indicates that the detection information is consistent with the information detected by the upstream steel monitoring point, that is, the state of the hot metal detector is normal, and the detection process is ended.
S307, when the hot metal detector does not detect the steel signal, prejudging that the state of the hot metal detector is a fault, and continuously executing the step S4;
at this time, the absence of the steel signal detected by the metal detector indicates that the detected information is inconsistent with the information detected by the upstream steel monitoring point, which may be caused by the failure of the hot metal detector, and may also cause the failure of the rolling line, such as: production interruption caused by problems of steel piling in a rolling line and the like occurs, the state of the hot metal detector is judged to be a fault in advance, and subsequent state determination operation needs to be carried out to further determine the state of the hot metal detector.
S4, determining the state of the hot metal detector, comprising the following steps:
s401, continuously reading the count value of the timer, and when the count value t is reached4≥t1+t2And then, acquiring the steel signal information of the downstream steel detection point:
t4≥t1+t2the time counted by the counter is shown to be satisfied at the moment, the rolled piece passes through a downstream steel detection point, and the acquisition mode of the detection information of the downstream steel detection point and the acquisition mode of the detection information of the upstream steel detection point can be the same or different; can pass through the change situation of the rolling mill torque at the detection point or pass through the hot metal arranged at the detection pointThe detector detects the signal condition, etc. Of course, other detection means known in the art may be used.
S402, when a steel signal is detected at a downstream steel detection point, determining that the state of the hot metal detector is a fault;
at the moment, a downstream steel detection point detects a steel signal indicating that the rolled piece passes through a detection point where the hot metal detector is located, and the hot metal detector does not detect the steel signal, so that the problems such as production interruption and the like are not caused, but the hot metal detector is caused by the fault.
And S403, when the downstream steel detection point does not detect a steel signal, determining that the hot metal detector is normal in state and the rolling line is in fault.
At the moment, the downstream steel detection point does not detect a steel signal, which indicates that the rolled piece does not pass through the downstream steel detection point, namely, the hot metal detector does not detect a steel signal, which is caused by the fault of the rolling line, but is caused by the fault of the non-hot metal detector, namely, the condition of the hot metal detector is determined to be normal.
According to the online detection method for the state of the hot metal detector, the detection state of the hot metal detector is determined by acquiring the temperature information of a rolled piece, the detection information of steel detection points at the upstream and downstream of the hot metal detector, the steel signal information and the detection information of the hot metal detector, comparing and analyzing the information, the judgment on the abnormal detection state of the hot metal detector can be realized, and the technical problem of control function failure caused by abnormal detection state of the hot metal detector is solved.
In a second aspect, as shown in fig. 2, the present application example provides an on-line detection device for the state of a hot metal detector in a continuous rolling line, which corresponds to the detection method in the above-mentioned embodiment. The device includes: the system comprises a first information acquisition module 501, a second information acquisition module 502, a first data processing module 503, a third information acquisition module 504, a fourth information acquisition module 505, a second data processing module 506, a fifth information acquisition module 507, a first control module 508, a first comparison and judgment module 509, a sixth information acquisition module 510, a second comparison and judgment module 511, a third comparison and judgment module 512, a seventh information acquisition module 513 and a fourth comparison and judgment module 514. The functional modules are explained in detail as follows:
a first information acquisition module 501 for acquiring a distance L from an upstream steel detection point to a hot metal detector1；
A second information acquisition module 502 for acquiring rolling speed information V between an upstream steel detection point and a hot metal detector1；
A first data processing module 503 for calculating the time t required for the product to pass between the upstream steel detection point and the hot metal detector1；
A third information acquisition module 504 for acquiring a distance L from the hot metal detector to a downstream steel detection point2；
A fourth information acquisition module 505 for acquiring rolling speed information V from the hot metal detector to a downstream steel detection point2；
A second data processing module 506 for calculating the time t required for the rolled piece to pass through the hot metal detector to the downstream steel detection point2；
A fifth information acquisition module 507, configured to acquire information of a steel signal at an upstream steel detection point;
the first control module 508 starts a timer when the fifth information acquisition module 507 acquires the information that steel exists;
a first comparing and determining module 509 for comparing the read timer count value t3And t1Comparing;
the sixth information collecting module 510, when t is3≥t1The method is used for acquiring the detection information of the hot metal detector;
the second comparison and judgment module 511 is used for comparing and judging whether the hot metal detector detects a steel signal, and when the hot metal detector detects a steel signal, judging that the state of the hot metal detector is normal and finishing the detection process; when the hot metal detector does not detect a steel signal, the state of the hot metal detector is judged to be a fault in advance;
a third comparing and determining module 512, configured to read the timer count value t when the status of the hot metal detector is judged to be a fault4And t1+t2Comparing;
a seventh information collecting module 513, when t is4≥t1+t2The method comprises the steps of acquiring steel signal information of a downstream steel detection point;
a fourth comparing and judging module 514, which determines that the state of the hot metal detector is a fault when the downstream steel detection point detects a steel signal; and when the downstream steel detection point does not detect a steel signal, judging that the rolling line is in fault, and judging that the state of the hot metal detector is normal.
Furthermore, the on-line detection device also comprises an eighth information acquisition module and a fifth comparison and judgment module, when the upstream steel detection point detects the rolled piece, wherein the eighth information acquisition module is used for acquiring the upstream rolled piece temperature value T and the lowest detection temperature value T allowed by the hot metal detector0(ii) a The fifth comparison and judgment module is used for comparing T with T0When T is less than T0And in time, alarming the temperature of the rolled piece is low.
The specific limitations of the online detection device may correspond to the limitations of the online detection method, and are not described herein again. The modules in the online detection device can be wholly or partially realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In a third aspect, the present application provides an apparatus for online detection of hot metal detector status in a continuous rolling line, the apparatus comprising:
a memory to store instructions;
a processor for executing the memory-stored instructions and, when the processor executes the memory-stored instructions, causing the device to perform the aforementioned online detection method, e.g., steps S101 to S403 shown in fig. 1. Alternatively, when the processor executes the instructions, the functions of the modules of the online detection device, for example, the functions of the modules 501 to 514 shown in fig. 2, are implemented.
In a fourth aspect, the present examples provide a computer storage medium storing computer-executable instructions that, when executed by a processor of a computer, cause the computer to perform the aforementioned online detection method, such as steps S101 to S403 shown in fig. 1. Alternatively, when the processor executes the instructions, the functions of the modules of the online detection device, for example, the functions of the modules 501 to 514 shown in fig. 2, are implemented.
It should be noted that the online detection method of the present application can be applied to a processor, or implemented by a processor. The processor may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The Processor may be a general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, or discrete hardware components. The various methods, steps, and logic blocks disclosed in this application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in this application may be directly implemented by a hardware decoding processor, or may be implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions.
As an alternative embodiment, as shown in fig. 3, the present application further provides an online detection method for the hot metal detector status in a continuous rolling line, the method comprising the following steps:
step P101, obtaining L1、L2、V1、V2And the information of the rolled piece is obtained.
Step P102, calculating t1And t2。
And step P103, if the upstream steel detection point detects a steel signal, executing step P104. Otherwise, jump to step P1010.
Step P104, acquiring the actual temperature T of the rolled piece and the lowest detection temperature T allowed by the hot metal detector0Step P105 and step P115 are executed.
In step P105, a timer starts counting time.
Step P106, reading the counting time t of the timer3。
Step P107, if t3≥t1Step P108 is performed. Otherwise, jump to step P106.
In step P108, the hot metal detector detects the presence of steel, and step P117 is performed. Otherwise, go to step P109.
And step P109, pre-alarming the state of the hot metal detector.
Step P110, reading the counting time t of the timer4。
Step P111, if t4≥t1+t2Step P112 is performed. Otherwise, jump to step P110.
And step P112, if the downstream steel detection point detects a steel signal, executing step P118. Otherwise, go to step P113.
And step P113, the hot metal detector is in a normal state, the rolling line is in a fault state, and an alarm is given at the same time.
And step P114, automatically entering the production interruption control of the rolling line.
Step P115, if T is less than or equal to T0Step P116 is executed. Otherwise, jump to step P104.
And P116, alarming when the temperature of the rolled piece is low.
In step P117, the hot metal detector is in a normal state.
And step P118, confirming the state fault of the hot metal detector and prompting an alarm.
In step P119, error correction control is automatically performed.
And step P120, ending.
The above description is only for the purpose of illustrating specific embodiments of the present application and is not to be construed as limiting the present application, and it is apparent to those skilled in the art that various modifications and variations can be made in the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (9)
1. An online detection method for the state of a hot metal detector in a continuous rolling production line is characterized by comprising the following steps:
s1, acquiring preset upstream detection information between an upstream steel detection point and a hot metal detector; the upstream detection information includes: distance L between upstream steel detection point and hot metal detector1Rolling speed information V1And the time t calculated from the above required time for the rolled piece to pass through the upstream steel detection point and the hot metal detector1；
S2, acquiring preset downstream detection information between the hot metal detector and a downstream steel detection point; the downstream detection information includes: distance L between hot metal detector and downstream steel detection point2Rolling speed information V2And the time t required for the rolled piece to pass through the hot metal detector and the downstream steel detection point calculated by the calculation2；
S3, acquiring steel signal information of an upstream steel detection point; when upstream steel detection point detectsStarting the timer after the steel signal appears, reading the count value of the timer, and when the count value t of the timer appears3≥t1Then, acquiring the detection information of the hot metal detector; wherein:
when the hot metal detector detects that a steel signal exists, the state of the hot metal detector is normal, and the detection process is finished;
when the hot metal detector does not detect the steel signal, the state of the hot metal detector is judged to be a fault in advance, and the step S4 is continuously executed;
s4, continuously reading the timer count value when the count value t is reached4≥t1+t2And then, acquiring the steel signal information of the downstream steel detection point:
when a downstream steel detection point detects a steel signal, determining that the state of the hot metal detector is a fault;
and when the downstream steel detection point does not detect a steel signal, judging that the rolling line is in fault, and judging that the state of the hot metal detector is normal.
2. The method of claim 1, wherein in step S3, after the rolled product is detected at the upstream steel detection point and the timer is started, the following actions are taken: reading the temperature value T of the rolled piece and the lowest detection temperature value T allowed by the hot metal detector0；
When T is less than T0When the temperature of the rolled piece is low, alarming is carried out;
when T is more than or equal to T0And continuing to execute subsequent detection.
3. The method of claim 1, wherein in step S4, when the hot metal detector status is determined to be faulty, automatically entering error correction control to avoid production interruption, the error correction control comprising: transfer control variables and lockout related adjustments.
4. The method according to claim 2, wherein in step S3, after the warning of low rolled piece temperature, error correction control is automatically entered to avoid production interruption, and the error correction control comprises: transfer control variables and lockout related adjustments.
5. The method according to any one of claims 1 to 4, wherein in step S4, when it is judged that the rolling line is failed, the production stop control is automatically entered.
6. An on-line detector for the state of a hot metal detector in a continuous rolling production line is characterized by comprising:
a first information acquisition module for acquiring the distance L between the upstream steel detection point and the hot metal detector1；
A second information acquisition module for acquiring rolling speed information V between an upstream steel detection point and the hot metal detector1；
A first data processing module for calculating the time t required for the rolled piece to pass through the upstream steel detection point and the hot metal detector1；
A third information acquisition module for acquiring the distance L from the hot metal detector to the downstream steel detection point2；
A fourth information acquisition module for acquiring rolling speed information V from the hot metal detector to a downstream steel detection point2；
A second data processing module for calculating the time t required for the rolled piece to pass through the hot metal detector to the downstream steel detection point2；
The fifth information acquisition module is used for acquiring the steel signal information of the upstream steel detection point;
the first control module starts a timer when the fifth information acquisition module acquires the steel signal;
a first comparison and judgment module for reading the timer count value t3And t1Comparing;
a sixth information acquisition module, when t3≥t1The method is used for acquiring the detection information of the hot metal detector;
the second comparison and judgment module is used for comparing and judging whether the hot metal detector detects a steel signal or not, and when the hot metal detector detects the steel signal, the state of the hot metal detector is normal and the detection process is finished; when the hot metal detector does not detect a steel signal, the state of the hot metal detector is judged to be a fault in advance;
a third comparing and judging module for reading the timer count value t when the state of the hot metal detector is judged to be fault4And t1+t2Comparing;
a seventh information acquisition module, when t4≥t1+t2Then, acquiring the steel signal information of the downstream steel detection point;
the fourth comparison and judgment module is used for determining that the state of the hot metal detector is a fault when the downstream steel detection point detects a steel signal; and when the downstream steel detection point does not detect a steel signal, judging that the rolling line is in fault, and judging that the state of the hot metal detector is normal.
7. The on-line detection device according to claim 6, further comprising an eighth information acquisition module and a fifth comparison and judgment module, wherein the eighth information acquisition module is used for acquiring the temperature value T of the upstream rolled piece and the lowest detection temperature value T allowed by the hot metal detector after the rolled piece is detected at the upstream steel detection point0(ii) a The fifth comparison and judgment module is used for comparing T with T0When T is less than T0And in time, alarming the temperature of the rolled piece is low.
8. An apparatus for on-line detection of hot metal detector status in a continuous rolling line, the apparatus comprising:
a memory to store instructions;
a processor for executing the memory-stored instructions and, when executed by the processor, causing the apparatus to perform the method of any of claims 1 to 5.
9. A computer storage medium storing computer executable instructions, wherein when the computer executable instructions are executed by a processor of a computer, the computer performs the method of any one of claims 1 to 5.
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