A strip steel uncoiling tracking and abnormality judging system of a hot galvanizing production line
By combining monitoring cameras and PLC control systems on the hot-dip galvanizing production line, the strip uncoiling process can be monitored in real time, solving the problem of low efficiency caused by manual tracking, realizing automatic alarm and timely handling of abnormal situations, and improving production efficiency and quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIUGANG GROUP GANSU HONGXING HONGYU NEW MATERIALS CO LTD
- Filing Date
- 2025-04-02
- Publication Date
- 2026-06-19
AI Technical Summary
In existing technologies, the manual tracking mode of steel coils on hot-dip galvanizing production lines is inefficient and cannot detect abnormalities such as stuck steel or obstructed steel in a timely manner, resulting in quality loss and increased safety risks.
By combining a surveillance camera with a PLC control system, the strip uncoiling process is monitored in real time. The surveillance camera acquires on-site images and coordinates them with the motor signals collected by the PLC control system to achieve anomaly detection and automatic alarm.
It enables timely alarms for abnormal situations in steel coils, preventing problematic steel coils from flowing into subsequent processes, improving production efficiency and quality, and reducing safety risks.
Smart Images

Figure CN224383715U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of visual recognition technology, specifically to a strip steel uncoiling tracking and anomaly judgment system for a hot-dip galvanizing production line. Background Technology
[0002] First, in an environment of global economic integration and intensified market competition, the steel industry needs to improve production efficiency to reduce operating costs. Real-time monitoring of the uncoiling process can quickly identify problems, reduce downtime, and increase capacity. Second, product quality directly affects a company's market competitiveness. Tracking the uncoiling status can promptly identify material defects, ensuring that the production process meets quality standards, thereby enhancing customer trust and satisfaction. Furthermore, with increasingly stringent safety regulations, real-time monitoring can identify potential risks, take timely preventative measures, ensure production safety, and reduce the accident rate. In terms of technological development, the Internet of Things and big data analytics have made intelligent and automated steel coil uncoiling possible, not only improving production flexibility but also enabling data-driven decision support. Finally, against the backdrop of increasing environmental pressure, effective resource and energy management can reduce waste in the production process, mitigate environmental impact, and achieve sustainable development. In conclusion, it is necessary to develop a steel coil uncoiling tracking and anomaly detection system to improve production efficiency and product quality, reduce energy consumption, protect the environment, and create significant economic and social value for enterprises. Utility Model Content
[0003] The purpose of this utility model is to provide a strip uncoiling tracking and anomaly judgment system for a hot-dip galvanizing production line, so as to ensure that an alarm can be immediately triggered if any abnormal situation such as steel jamming or obstruction occurs on site during the steel coil transfer process.
[0004] A strip steel uncoiling tracking and anomaly judgment system for a hot-dip galvanizing production line includes monitoring cameras installed at each process of the strip steel uncoiling section of the hot-dip galvanizing production line. The monitoring cameras are connected to an industrial control computer located in the electrical room. The industrial control computer is also connected to a PLC control system, which is connected to the drive motors of each process of the strip steel uncoiling section.
[0005] The monitoring camera is installed next to the strip uncoiling section and tilted downwards at 50-60° to face each process in the strip uncoiling section.
[0006] This utility model has the following beneficial effects:
[0007] The purpose of this uncoiling tracking and anomaly detection technology is to replace the past manual tracking of steel coils. It ensures that if any abnormalities such as steel jamming or obstruction occur during the steel coil transfer process, an alarm can be triggered immediately to remind staff to handle the situation and prevent problematic steel coils from flowing into subsequent stages of the hot-dip galvanizing production line, causing greater quality losses. Attached Figure Description
[0008] Figure 1 This is a schematic diagram of the structure of this utility model.
[0009] Figure 2 for Figure 1 A schematic diagram showing the locations of surveillance cameras in the strip steel uncoiling section.
[0010] In the diagram, 1-surveillance camera, 2-industrial computer, 3-PLC control system. Detailed Implementation
[0011] The present invention will be further explained below with reference to the accompanying drawings.
[0012] like Figure 1 As shown, a strip steel uncoiling tracking and anomaly judgment system for a hot-dip galvanizing production line includes monitoring cameras 1 installed at each process of the strip steel uncoiling section of the hot-dip galvanizing production line. The monitoring cameras 1 are connected to an industrial control computer 2 installed in the electrical room. The industrial control computer 2 is also connected to a PLC control system 3. The PLC control system 3 is connected to the drive motors of each process of the strip steel uncoiling section.
[0013] Specifically, such as Figure 2 As shown, 10 monitoring points are set at the double uncoiling channel of the strip steel, 4 monitoring points are set at each of the upper uncoiling channels, 3 monitoring points are set at the lower uncoiling machine, 1 monitoring point is set at the downhill channel of the upper uncoiling machine, 1 monitoring point is set at the convergence point of the double uncoiling channels (welding machine entrance), and 1 monitoring point is set at the welding machine clamp. The monitoring camera 1 is installed at the monitoring point and tilted downwards at 50~60° to face each process, so as to obtain the uncoiling scene on site in real time through the monitoring camera.
[0014] The working process of this utility model is as follows:
[0015] Because the uncoiling area is quite long, monitoring cameras 1 in different areas need to work together. Multiple monitoring cameras simultaneously capture real-time photos of each process to determine whether the timing of each step in the strip uncoiling process ("uncoiling" - "straightening" - "cross-cutting" - "threading" - "welding") is within the normal range. This facilitates staff judgment and adjustment, ensuring production continuity. At the same time, the PLC control system 3 collects the motor torque and current signals of the drive motors in each process. If a fault such as steel jamming or obstruction occurs, the strip will arch and change its shape, and the corresponding motor torque and instantaneous current will also increase. The image signals collected by monitoring camera 1 and the motor signals collected by PLC control system 3 work together to improve the accuracy of the detection results and avoid false detections. After a fault occurs, an alarm will be displayed on the industrial control computer 2 to prompt the operator to handle it in time. The PLC control system 3 will shut down the drive motors of each process, and the operators will manually restore them after handling the situation.
[0016] In summary, this utility model replaces the previous manual tracking of steel coils, ensuring that if any abnormalities such as steel jamming or obstruction occur during the steel coil transfer process, an alarm can be immediately triggered to remind staff to handle the situation, thus preventing problematic steel coils from flowing into subsequent stages of the hot-dip galvanizing production line and causing greater quality losses.
Claims
1. A strip steel uncoiling tracking and abnormality determination system for a hot dip galvanizing line, characterized by, The system includes monitoring cameras (1) installed at each process of the strip steel uncoiling section of the hot-dip galvanizing production line. The monitoring cameras (1) are connected to the industrial control computer (2) located in the electrical room. The industrial control computer (2) is also connected to a PLC control system (3). The PLC control system (3) is connected to the drive motors of each process of the strip steel uncoiling section. The monitoring cameras (1) are installed on the side of the strip steel uncoiling section and tilted downwards at 50-60° to face each process of the strip steel uncoiling section.