A method for online monitoring of wire escape of disc shears

Abstract

A method for online monitoring of wire escape from a disc shear belongs to the field of control. First, an online monitoring system for wire escape from a disc shear is constructed to perform real-time detection of video surveillance images of wire on the transmission and operating sides of a silo. When the disc shear begins operation, after a delay of t seconds, the movement detection function of the wire on the transmission and operating sides of the silo is automatically activated. If no moving wire is detected passing through the transmission or operating side, it indicates that the wire on the transmission or operating side has not entered the silo, and the disc shear has experienced a wire escape fault on its transmission or operating side, issuing a wire escape alarm signal. When no wire escape occurs from the lead and the normal shearing process begins, a wire escape fault is determined based on the real-time actual width of the incoming material, the centerline deviation of the incoming material, and the target width after cutting. When the system issues a warning signal indicating that the wire is too narrow, the operator confirms whether there is a wire escape trend by checking the video surveillance signals of the transmission and operating side chutes and the internal silo.

Description

Technical Field

[0001] The present invention belongs to the field of control, and in particular relates to an online monitoring device and a monitoring method for a circular shear wire escapement based on video image motion detection. Background Art

[0002] Disc shear is an indispensable and important equipment of cold rolling and hot dip galvanizing unit. Its main function is to cut the strip to a fixed width and remove the edge defects of the strip.

[0003] As a commonly used process, during the operation of the disc shear, the edge wire cut by the disc shear first needs to enter the chute, and then be introduced into the silo by the chute, and finally enter the briquetting machine through the silo for briquetting.

[0004] Therefore, the smooth entry of the edge wire cut by the disc shear into the chute is a prerequisite for ensuring the normal operation of the disc shear. When the incoming strip steel is off track, narrow in gauge, or has poor plate quality, the blade side clearance, overlap, and front and rear tension settings are unreasonable, the blade is chipped, loose, or abnormally worn, it is easy for the edge wire to escape from the chute (escape wire).

[0005] The problem of escaped wire is a thorny issue faced by all circular shears. If not detected in time, it can lead to a large accumulation of side wires, requiring immediate machine shutdown and processing. This results in downtime, production losses, and significantly increased repair costs. As the intelligence level and speed of circular shears continue to improve, cutting speeds are increasing. The escaped wire problem has become a bottleneck that hinders machine speed increases and stable production.

[0006] At present, there are no intelligent monitoring and detection means at the production site to prevent and identify wire escapes in disc shears. Operators can only rely on visually observing whether the working condition of the disc shears is normal. It is generally difficult to detect wire escapes in time.

[0007] To this end, in order to adapt to the development trend of intelligent and less-manned production processes, effective measures are taken to monitor escaped wire faults online, so that escaped wire problems can be discovered and dealt with in a timely manner, thereby minimizing the losses caused by downtime. Summary of the Invention

[0008] The technical problem to be solved by this invention is to provide a method for online monitoring of wire escapes in a circular shear. This method, by constructing a software and hardware system for online monitoring of wire escapes in a circular shear, performs motion detection on video images of the edge wire in the drive and operating side hoppers. This method enables real-time monitoring and prompt alarms for wire escape failures in the circular shear. It also provides timely warnings for wire escape risks caused by material width fluctuations and deviation. This prevents downtime and batch product scrapping caused by inadequate wire handling, ensuring the stable operation of the circular shear in good working condition.

[0009] The technical solution of the present invention is to provide an online monitoring method for escaped wire of a disc shear, which is characterized by:

[0010] 1) On the transmission and operating sides of the silo, an online monitoring system for the escaped wire of the disc shear is built. After the disc shear starts working, the system can monitor the escaped wire on the transmission and operating sides of the silo in real time.

[0011] 2) Collect the identification signal of whether the disc shear is working, which is used to judge whether the disc shear is working in real time;

[0012] 3) When the disc shear starts working, after a delay of t seconds, the movement detection function of the wire on the transmission side and the operating side of the silo is automatically activated;

[0013] 4) If the monitoring system detects that there are moving edge wires passing through the transmission side and the operating side of the silo, it is determined that there is no wire escape failure in the disc shear and the working condition is normal;

[0014] 5) If it is detected that there is no moving edge wire passing through the transmission side or the operating side, it means that the edge wire on the transmission side or the operating side has not entered the silo, and the disc shear has a wire escape fault on its transmission side or the operating side, that is, a wire escape alarm signal is issued through the online monitoring software;

[0015] 6) When there is no escape wire at the head of the tape and it enters the normal shearing process, according to the real-time actual width w of the incoming material s , the center line deviation δ of the incoming material, and the target width w after cutting are used to determine whether a wire escape failure occurs:

[0016] when When the wire edge is too narrow, the system prompts that there is a risk of wire escape, and issues an early warning signal through the online monitoring software;

[0017] Among them, a is the warning value of the wire being too narrow set by the system;

[0018] 7) When the system issues a warning signal that the edge wire is too narrow, the operator checks the video monitoring signals inside the transmission side and operating side chutes and silos to confirm whether there is a trend of wire escape. If a trend of wire escape is found, it will be dealt with immediately.

[0019] Specifically, the implementation of the motion detection function at least includes:

[0020] 1) Divide the image transmitted by the cameras on the transmission and operation sides of the silo into n×n small grids, and perform RBG conversion on each small grid to convert it into RGB data format;

[0021] 2) Using the inter-frame difference method, the corresponding pixel values ​​of two adjacent frames in the video image sequence of the transmission side and the operation side inside the silo are subtracted to obtain a differential image, and then the differential image is binarized to determine the position of the moving edge wire in the image;

[0022] 3) Using the background difference method, the current frame image in the video image sequence of the transmission side and the operation side inside the silo is differentially calculated with the background image, and the differential image is binarized. The position of the moving edge wire in the image is determined by using the differential image binarization;

[0023] 4) The inter-frame difference method and background difference method are used to determine whether there is any moving edge wire passing through the video monitoring area inside the transmission side and operation side silo.

[0024] Specifically, the online monitoring hardware system for the escaped wire of the disc shear includes a camera device for performing video monitoring of the chute and the inside of the silo on the operating side and the transmission side respectively;

[0025] Among them, the images captured by the camera devices installed on the operating side and transmission side of the chute constitute the chute video monitoring; the images captured by the camera devices installed on the operating side and transmission side of the silo constitute the video monitoring inside the silo.

[0026] Specifically, the identification signal of whether the disc shear is working is obtained from the on-site industrial control computer L1.

[0027] Furthermore, the online monitoring method for the escaped wire of the disc shear adopts an inter-frame difference method or a background difference method and utilizes the differential image binarization to determine the position of the moving edge wire in the image.

[0028] Furthermore, the online monitoring method for the escaped wire of the disc shear has the following specific steps for determining whether there is a moving edge wire passing through the video monitoring area inside the transmission side and the operating side silo:

[0029] 1) If moving edge wire appears in both the transmission side and the operation side video monitoring areas, it is judged that there are moving edge wires in the transmission side and the operation side silos at this time, indicating that the disc shear is working normally, there is no wire escape failure, and the working condition is normal;

[0030] 2) If no moving edge wire appears in the video monitoring area on the transmission side or the operation side, it means that no moving edge wire is found in the material bin on the transmission side or the operation side, indicating that the edge wire on the transmission side or the operation side has not entered the material bin, and the disc shear has a wire escape failure on the transmission side or the operation side.

[0031] Specifically, when the image frames transmitted by the camera devices on the transmission side and the operation side inside the silo are divided into n×n small grids, the n×n small grids are preferably 64×64 small grids.

[0032] Furthermore, the online monitoring method for escaped wire of the disc shear is based on the online monitoring mode of the video image motion detection technology, which performs motion detection on the video images of the edge wire in the transmission side and the operation side silo to identify whether there is moving edge wire in the silo.

[0033] Furthermore, when the monitoring system issues an escape wire alarm signal, manual confirmation is performed through video monitoring. If the alarm signal is confirmed to be correct, confirmation is performed immediately; if the alarm signal is incorrect, the set threshold of the differential pixel is corrected after confirmation.

[0034] The online monitoring system for wire escape of the disc shear described in the technical solution of the present invention collects video monitoring images of the chutes on the transmission side and the operating side, and video monitoring images inside the silo on the transmission side and the operating side, while synchronously capturing relevant production data in real time from the server. The relevant production data includes at least: coil number, steel type, incoming material thickness, actual incoming material width, incoming material centerline deviation, target width after shearing, and whether the disc shear is working identification signal, and all data are stored in a database.

[0035] Compared with the prior art, the advantages of the present invention are:

[0036] 1. This technical solution establishes an online monitoring system for circular shear wire escapement based on video image motion detection technology. This system is used to identify the dynamic images of edge wire passing through the silo. Motion detection technology is used to identify whether there is moving edge wire in the silo, and timely alarm and processing are issued for circular shear wire escapement. This achieves online monitoring of wire escapement failures during the shearing process, minimizing losses caused by downtime.

[0037] 2. This technical solution proposes a method for determining wire escape failure during the shearing process of a circular shear. This method can provide early warning and alarm for wire escape failures, avoiding downtime accidents and batch product scrapping caused by inadequate wire handling, and ensuring that the circular shear equipment operates stably in good working condition.

[0038] 3. The entire technical solution is simple, easy to implement and reliable in operation. It does not require modification of the original equipment, making it easy to put into practical application on site. It can also be further optimized during actual use to continuously improve the accuracy of alarms and early warnings. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a schematic diagram of the hardware system for online monitoring of wire escape of a disc shear according to the present invention;

[0040] Figure 2 It is a flow chart of the online monitoring system for the escaped wire of the disc shear of the present invention. DETAILED DESCRIPTION

[0041] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0042] The technical solution of the present invention proposes an online monitoring method for escaped wire of a disc shear based on video image motion detection technology. The main principle is: when the disc shear is in working state, motion detection is performed on the video monitoring images of the edge wires on the transmission side and the operating side inside the hopper to determine whether there is a moving edge wire: when there is a moving edge wire, it is considered that the working condition is normal; when there is no moving edge wire, it is considered that the edge wire has not entered the hopper, that is, a wire escape failure is confirmed, and an alarm is issued in time.

[0043] To implement the above monitoring principle, the technical solution of the present invention mainly includes the following steps:

[0044] 1. Build a hardware system for online monitoring of wire escape of disc shears:

[0045] Disc shear wire escape online monitoring hardware system Figure 1 As shown in the figure, the system mainly includes the following components:

[0046] (a) Four industrial-grade network digital cameras monitor the chutes on the operating and transmission sides (represented by the "disc shear working area" in the figure) and the interior of the silo. The chute video monitoring is used by operators to observe and confirm whether there is any escaped wire in the chutes on the transmission and operating sides. The internal silo video monitoring is used by the online monitoring system to perform motion detection and escaped wire determination on the video images of the edge wire on the transmission and operating sides, and by the operator to observe the edge wire status on the transmission and operating sides inside the silo and confirm whether there is any moving edge wire.

[0047] (b) System electrical control box, which contains a three-layer switch, power sockets and power modules, etc.

[0048] (c)Switch.

[0049] (d) Server and System Software.

[0050] AC power is introduced from an external source into the socket of the system's electrical control box. A power module then converts the AC power into DC power for the camera. Video signals are transmitted via a network cable to a Layer 3 switch in the system's electrical control box, and then further transmitted via the network to a switch located near the machine. Finally, they are transmitted to a remote server via the network, using either an optical cable or a network cable depending on the transmission distance. The server is used to install and run online monitoring software to monitor and issue alarms for escape wire faults.

[0051] 2. Online monitoring method:

[0052] After the hardware system is built, develop and install the wire escape monitoring system software to enable it to have data collection, real-time analysis, alarm processing, data storage and other functions. The specific monitoring steps are as follows:

[0053] (1) The main screen of the wire escape monitoring system is the monitoring screen of four cameras, namely the video monitoring screen of the chute on the transmission side and the operating side, and the video monitoring screen inside the silo on the transmission side and the operating side. At the same time, relevant production data are captured in real time from the unit big data server, mainly including: coil number, steel type, incoming material thickness, actual incoming material width, incoming material centerline deviation, target width after shearing, and whether the disc shear is working. The signal identification, etc., are stored in the database for subsequent call and historical query.

[0054] (2) According to the collected disc shear working identification signal, it is judged in real time whether the disc shear is working. If the disc shear starts working, the next step is entered.

[0055] (3) When the disc shear starts working, after a delay of t seconds, the motion detection function of the edge wire on the transmission side and the operating side of the silo is automatically activated. Since there is a delay from the start of the disc shear to the edge wire entering the camera monitoring area of ​​the silo, it is necessary to delay the activation of the motion detection function. The specific delay time can be set according to the actual situation of the unit.

[0056] (4) The image transmitted by the cameras on the transmission side and the operation side of the silo is divided into n×n small grids, and RBG conversion is performed on each small grid.

[0057] (5) Using the inter-frame difference method, the corresponding pixel values ​​of two adjacent frames in the video image sequence of the transmission side and the operation side inside the silo are subtracted to obtain a differential image. The differential image is then binarized. The position of the moving edge wire in the image can be determined by using the differential image binarization:

[0058] (5.1) If the pixel value of the image in the region changes greatly and exceeds the set threshold, it is considered that there is a moving edge in the region and the region is marked as the foreground area;

[0059] (5.2) If the pixel value of the image in the area does not change much and does not exceed the set threshold, it is considered that there is no moving edge in the area and the area is marked as the background area;

[0060] Wherein, the set threshold is determined by setting parameters of image processing software in the online monitoring system.

[0061] (6) Using the background difference method, the current frame image in the video image sequence of the transmission side and the operation side inside the silo is differentially calculated with the background image, and the differential image is binarized. The position of the moving edge wire in the image can be determined by using the differential image binarization:

[0062] (6.1) If the difference pixels in the region exceed the set threshold, a moving edge appears in the region and the region is marked as the foreground area;

[0063] (6.2) If the difference pixel in the area is less than the set threshold, there is no moving edge in the area and the area is marked as the background area.

[0064] (7) Due to the complexity and unpredictability of the scene and the existence of various environmental interferences and noises, the inter-frame difference method and background difference method are used to determine whether there is a moving edge wire passing through the video monitoring area inside the transmission side and the operation side silo. The specific method is as follows:

[0065] (7.1) If the transmission side and the operating side meet any of the conditions in (5.1) and (6.1), it can be judged that there are moving edge wires in the material bins on both the transmission side and the operating side, indicating that the disc shear is working normally, there is no wire escape failure, and the working condition is normal.

[0066] (7.2) If the transmission side (or operating side) satisfies both (5.2) and (6.2), it means that no moving edge wire is found in the hopper on the transmission side (or operating side), indicating that the edge wire on the transmission side (or operating side) has not entered the hopper, and the disc shear has a wire escape failure on the transmission side (or operating side). The system issues a wire escape alarm signal, after which the alarm indicator turns red and the alarm bell sounds.

[0067] When the monitoring system issues a wire escape alarm signal, it is manually confirmed through video monitoring. If the alarm signal is confirmed to be correct, it is processed immediately and the "alarm correct" confirmation item is clicked on the system software; if the alarm signal is incorrect, the "warning incorrect" confirmation item is clicked on the system software, and the software will automatically correct the set threshold of the differential pixel.

[0068] (8) When there is no wire escape at the head of the strip and the strip enters the normal shearing process, considering that the width of the incoming material may fluctuate, the strip may deviate, and other abnormal conditions may occur during the operation of the strip. When the width of the edge wire on the operating side or the transmission side is too small, the wire escape phenomenon is likely to occur. Therefore, the system automatically adjusts the actual width of the incoming material according to the real-time actual width w s , the center line deviation δ of the incoming material and the target width w after shearing are used to make judgments:

[0069] when When the wire is too narrow, the system indicates that there is a risk of wire escape and issues a warning signal through the online monitoring software. When the incoming material is deviating, the centerline deviation δ is non-zero; when the incoming material is not deviating, the centerline deviation δ is zero. a is the warning value set by the system for wire too narrow.

[0070] When the system issues a warning signal that the edge wire is too narrow, the operator checks the video monitoring signals inside the chute and silo on the transmission and operating sides to confirm whether there is a trend of wire escape. If a trend of wire escape is found, it will be dealt with immediately.

[0071] Example

[0072] In order to further illustrate the application process of the technical solution of the present invention, a disc shearing machine group of a certain production line is taken as an example to describe in detail the application process of the online monitoring method for the escaped wire of the disc shearing machine.

[0073] First, according to the technical plan, the hardware and software systems for online monitoring of escaped wire of the disc shear are constructed. Four industrial-grade network digital cameras are installed on the walkway bracket above the chute and on the side of the silo, respectively, to perform video monitoring of the chute and the inside of the silo on the operating side and the transmission side. Among them, the camera for chute video monitoring is installed on the walkway bracket above the chute through a fixed bracket, which is used by the operator to observe and confirm whether there is escaped wire on the transmission side and the operating side; the camera for video monitoring inside the silo has its own light source and is installed in the mounting hole on the side of the silo through a fixed bracket. It is mainly used for the system to perform motion detection and escaped wire judgment on the video images of the wire on the transmission side and the operating side.

[0074] A 220V, 50Hz AC power supply is introduced from an external source into the socket of the system's electrical control box. A power module then converts the AC power into 12V DC power for the camera. The video signal is transmitted via Category 5 twisted-pair cable to a Layer 3 switch in the system's electrical control box. It is then transmitted via the network to a nearby switch and finally via optical cable to a remote server. Online monitoring software is installed and running on the server to monitor and generate alarms for any escaped wires.

[0075] When the circular shear use indicator signal Circle_shear_use is equal to 1, it indicates that the circular shear is in operation. After an 8-second delay (8 seconds between the start of the circular shear and the edge wire entering the silo camera monitoring area), the motion detection function of the edge wire on the transmission side and the operating side of the silo is automatically activated.

[0076] The images transmitted by the cameras on the transmission and operating sides of the silo are divided into 64×64 grids, and each grid is converted to RGB data format through RBG conversion. Wire motion is detected on the transmission and operating sides using inter-frame and background subtraction methods. Whenever a moving wire enters the detection area, the corresponding grid border turns green.

[0077] When the monitoring system detects that there are moving edge wires passing through both the transmission side and the operating side of the hopper, it is determined that the disc shear has no wire escape failure and the working condition is normal; when it is detected that there is no moving edge wire passing through the transmission side (or operating side), it indicates that the edge wire on the transmission side (or operating side) has not entered the hopper, and the disc shear has a wire escape failure on the transmission side (or operating side), and the system sends out a wire escape alarm signal, after which the alarm indicator light turns red and the alarm bell sounds.

[0078] When there is no escaped wire at the leading edge and the normal shearing process is entered, the online monitoring and warning function of the edge wire width is activated, and the warning value of the edge wire being too narrow is set to 4mm.

[0079] When the system receives the actual width of the strip w s =1225mm, target width after shearing w=1213mm, centerline deviation of incoming material δ=0, at this time, If the value is greater than the warning value of 4mm, the system determines that the working condition is normal.

[0080] When the system receives the actual width of the strip w s =1223mm, and the incoming material deviates, δ=1.5mm, If the edge is less than the warning value of 4mm, the system will issue a warning signal that the edge is too narrow.

[0081] The operator checks the video monitoring signals inside the chute and silo on the transmission and operating sides to confirm whether there is a trend of wire escape. If a trend of wire escape is found, it will be dealt with immediately.

[0082] The technical solution of the present invention adopts an online monitoring mode of escaped wire of the disc shear based on video image motion detection technology, which is used to identify the dynamic picture of the edge wire passing through the hopper, and uses motion detection technology to perform motion detection on the video images of the edge wire in the hopper on the transmission side and the operating side, to identify whether there is moving edge wire in the hopper, to achieve real-time monitoring and timely alarm of escaped wire failure of the disc shear, and to provide timely warning of the risk of escaped wire caused by fluctuation of incoming material width and deviation, so as to avoid shutdown accidents and scrapping of batch products due to inadequate processing of escaped wire, and ensure that the disc shear operates stably in a good working condition.

[0083] The present invention can be widely used in the field of real-time online monitoring of the operating status of disc shearing equipment.

Claims

1. A method for online monitoring of wire escape of a disc shear, characterized by: 1) On the transmission and operating sides of the silo, an online monitoring system for the escaped wire of the disc shear is built. After the disc shear starts working, the system can monitor the escaped wire on the transmission and operating sides of the silo in real time. 2) Collect the identification signal of whether the disc shear is working, which is used to judge whether the disc shear is working in real time; 3) When the disc shear starts working, after a delay of t seconds, the movement detection function of the wire on the transmission side and the operating side of the silo is automatically activated; 4) If the monitoring system detects that there are moving edge wires passing through the transmission side and the operating side of the silo, it is determined that there is no wire escape failure in the disc shear and the working condition is normal; 5) If it is detected that there is no moving edge wire passing through the transmission side or the operating side, it means that the edge wire on the transmission side or the operating side has not entered the silo, and the disc shear has a wire escape fault on its transmission side or the operating side, that is, a wire escape alarm signal is issued through the online monitoring software; 6) When there is no escape wire at the head of the tape and it enters the normal shearing process, according to the real-time actual width w of the incoming material s , the center line deviation δ of the incoming material, and the target width w after cutting are used to determine whether a wire escape failure occurs: when When the wire edge is too narrow, the system prompts that there is a risk of wire escape, and issues an early warning signal through the online monitoring software; Among them, a is the warning value of the wire being too narrow set by the system; 7) When the system issues a warning signal that the edge wire is too narrow, the operator checks the video monitoring signals inside the transmission side and operating side chutes and silos to confirm whether there is a trend of wire escape. If a trend of wire escape is found, it will be dealt with immediately.

2. The method for online monitoring of escaped wire of a disc shear according to claim 1 is characterized in that The implementation of the motion detection function at least includes: 1) Divide the image transmitted by the cameras on the transmission and operation sides of the silo into n×n small grids, and perform RBG conversion on each small grid to convert it into RGB data format; 2) Using the inter-frame difference method, the corresponding pixel values ​​of two adjacent frames in the video image sequence of the transmission side and the operation side inside the silo are subtracted to obtain a differential image, and then the differential image is binarized to determine the position of the moving edge wire in the image; 3) Using the background difference method, the current frame image in the video image sequence of the transmission side and the operation side inside the silo is differentially calculated with the background image, and the differential image is binarized. The position of the moving edge wire in the image is determined by using the differential image binarization; 4) The inter-frame difference method and background difference method are used to determine whether there is any moving edge wire passing through the video monitoring area inside the transmission side and operation side silo.

3. The method for online monitoring of escaped wire of a circular shear according to claim 1, characterized in that The online monitoring hardware system for the escaped wire of the disc shear includes a camera device for video monitoring of the chute and the inside of the silo on the operating side and the transmission side respectively; Among them, the images captured by the camera devices installed on the operating side and transmission side of the chute constitute the chute video monitoring; The images captured by the cameras installed on the operating and transmission sides of the silo constitute the internal video surveillance of the silo.

4. The method for online monitoring of escaped wire of a disc shear according to claim 1 is characterized in that The identification signal of whether the disc shear is working is taken from the on-site industrial control computer L1.

5. The online monitoring method for the escaped wire of the disc shear according to claim 1 is characterized in that The online monitoring method for the escaped wire of the disc shear adopts an inter-frame difference method or a background difference method and utilizes the differential image binarization to determine the position of the moving edge wire in the image.

6. The method for online monitoring of escaped wire of a circular shear according to claim 1 is characterized in that The online monitoring method for the escaped wire of the disc shear, in determining whether there is a moving edge wire passing through the video monitoring area inside the transmission side and the operating side silo, has the following specific steps: 1) If moving edge wire appears in both the transmission side and the operation side video monitoring areas, it is judged that there are moving edge wires in the transmission side and the operation side silos at this time, indicating that the disc shear is working normally, there is no wire escape failure, and the working condition is normal; 2) If no moving edge wire appears in the video monitoring area on the transmission side or the operation side, it means that no moving edge wire is found in the material bin on the transmission side or the operation side, indicating that the edge wire on the transmission side or the operation side has not entered the material bin, and the disc shear has a wire escape failure on the transmission side or the operation side.

7. The method for online monitoring of escaped wire of a circular shear according to claim 2, wherein When the image pictures transmitted by the camera devices on the transmission side and the operation side inside the silo are divided into n×n small grids, the n×n small grids are 64×64 small grids.

8. The method for online monitoring of wire escape of a disc shear according to claim 1 is characterized in that The online monitoring method for the escaped wire of the disc shear is based on the online monitoring mode of the video image motion detection technology, which performs motion detection on the video images of the edge wire in the transmission side and the operating side silo to identify whether there is moving edge wire in the silo.

9. The method for online monitoring of escaped wire of a disc shear according to claim 1 is characterized in that When the monitoring system issues an escape wire alarm signal, manual confirmation is performed through video monitoring. If the alarm signal is confirmed to be correct, confirmation is performed immediately; If the alarm signal is wrong, the set threshold of the differential pixel is corrected after confirmation.

10. The online monitoring method for the escaped wire of the disc shear according to claim 1 is characterized in that The online monitoring system for wire escape of the disc shear collects video surveillance images of the chutes on the transmission side and the operating side, and video surveillance images inside the silo on the transmission side and the operating side, while simultaneously capturing relevant production data in real time from the server. The relevant production data includes at least: coil number, steel type, incoming material thickness, actual incoming material width, incoming material centerline deviation, target width after shearing, and whether the disc shear is working identification signal, and all data are stored in the database.

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