Alarm automatic closed-loop processing method for foreign matter monitored on conveying belt

Abstract

The invention discloses an alarm automatic closed-loop processing method for foreign matters monitored on a conveying belt, which comprises the following steps: identifying the foreign matters in a belt flow for the first time, automatically calculating the time when the foreign matters arrive at each transfer hopper and a next monitoring point according to the belt flow and the belt speed, and carrying out reinforced monitoring on the transfer hoppers in corresponding time periods, finally, whether the foreign matter exits the system or not is automatically tracked, and foreign matter detection alarm automatic closed-loop management is achieved. According to the method, automatic closed-loop processing is carried out according to the recognized foreign matter through a service extension algorithm, on one hand, risks caused by service automatic recognition of the foreign matter are met, on the other hand, automatic closed-loop of alarm is achieved, the problem of operation risks of a belt operation system is solved, meanwhile, the manual workload is not increased, and the scene service requirements are better met.

Description

Technical Field

[0001] The present invention relates to the field of belt conveyor technology, and in particular to a method for automatic closed-loop processing of foreign object alarms detected on a conveyor belt, and a method for automatic closed-loop processing of alarms of foreign objects on a conveyor belt in a bulk material conveyor belt system of an enterprise using visual detection. Background Art

[0002] Belt conveyors are widely used in industrial and mining enterprises as an efficient way to transfer solid bulk materials. During the material transfer process, debris in solid bulk materials (referring to large pieces, special-shaped pieces or strips that are different from normal materials) can easily get stuck at the exit of the transfer hopper, causing the belt to tear or clogging the transfer hopper, resulting in material blockage, interruption of the belt conveyor system, and even production line shutdown, causing great economic losses to industrial and mining enterprises.

[0003] With the advancement of technology, image recognition technology is applied in this working scenario. It uses monitoring cameras installed above the belt and intelligent algorithms to automatically identify foreign objects in solid bulk materials, and automatically alarm when the size exceeds the set size, as a risk reminder for the safe and stable operation of the belt. This is a function that is currently widely implemented in the industry, but there is still a certain gap with the actual needs of working companies. It is unable to identify whether foreign objects affect the safe and stable operation of the belt line and judge whether the risk has been eliminated. The alarm information needs to be processed manually, which increases the work intensity of the position to a certain extent.

[0004] Therefore, it is necessary to develop new technologies in a targeted manner to overcome the above problems. Summary of the invention

[0005] Purpose of the invention: In view of the shortcomings and defects of the prior art, the present invention provides a method for automatic closed-loop processing of foreign object alarms detected on a transport belt. Through a business extension algorithm, automatic closed-loop processing is performed based on the identified foreign objects. On the one hand, it meets the risks brought by the automatic identification of foreign objects in the business, and on the other hand, it realizes the automatic closed-loop of the alarm. While solving the operating risks of the belt operation system, it does not increase the workload of manual work, and is more in line with the business needs of the scene.

[0006] Technical solution: The method of automatic closed-loop processing of foreign object alarms detected on a transport belt of the present invention is characterized in that: when a foreign object is first identified in the belt process, the time when the foreign object arrives at each transfer hopper and the next monitoring point is automatically calculated according to the belt process and belt speed, and the transfer hopper is strengthened in the corresponding time period. Finally, it is automatically tracked whether the foreign object leaves the system, thereby realizing automatic closed-loop management of foreign object detection alarms.

[0007] Wherein, the belt speed is calculated using a fixed value.

[0008] Among them, when tracking whether the foreign object has left the system, if the foreign object has left the system, a series of foreign object alarms generated by the foreign object will be automatically processed; at the same time, it shows that the foreign object identification is accurate and effective; the foreign object leaving the system is judged by the image recognition result of the last belt in the process.

[0009] Among them, when tracking whether the foreign object has left the system, the foreign object has not left the system, situation 1: foreign object identification error, caused by a small piece of abnormal color material.

[0010] Among them, when tracking whether the foreign object has left the system, the foreign object has not left the system, situation two: the foreign object is buried in the material and leaves the system; or the foreign object is stuck in the transfer bucket.

[0011] Among them, the foreign matter stuck in the transfer bucket may cause belt tearing or material blockage in the transfer bucket; according to the belt process, the system automatically calculates the time for the foreign matter to reach each transfer bucket, monitors belt tearing and material overflow, and continuously monitors for a certain period of time to ensure that abnormalities are discovered in time and ensure the normal operation of the system without risk.

[0012] If no belt tearing is detected within the set time and no material overflows in the transfer hopper, the series of alarms will be automatically released; if belt tearing or material overflow in the transfer hopper is detected, the interlocking belt operation control will immediately shut down to avoid the expansion of the fault and protect the belt line.

[0013] Among them, the belt tear is identified through the traces on the material surface and compared with the normal material surface; the scattered material is comprehensively judged through visual monitoring and mechanical detection.

[0014] Among them, the belt includes a front belt, a middle belt and a tail belt, a first transfer hopper is provided between the front belt and the middle belt, and a second transfer hopper is provided between the middle belt and the tail belt; the first transfer hopper is provided with a first hopper mechanical overflow material detector, and the second transfer hopper is provided with a second hopper mechanical overflow material detector; a storage bin is provided at the end of the tail belt.

[0015] Among them, the front belt is provided with a first belt middle image monitoring camera and a first belt tail image monitoring camera, the middle belt is provided with a first belt head image monitoring camera, a second belt middle image monitoring camera and a second belt tail image monitoring camera, the tail belt is provided with a second belt head image monitoring camera, a third belt middle image monitoring camera and a third belt tail image monitoring camera, and foreign objects on the belt are detected by means of cameras and detectors.

[0016] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: on the basis of the industry's general implementation of foreign body monitoring, the present invention improves the integration of functions and services through a business extension algorithm, and achieves consistency between belt line visual monitoring and belt line business management requirements, thereby meeting business management requirements without increasing the workload of job personnel.

[0017] The present invention first identifies foreign objects (referring to large pieces, special-shaped flakes or strips that are different from normal materials) and realizes continuous monitoring of the whole process and key links (transfer hopper) of foreign objects in the process according to the belt process information. This method can effectively monitor the belt tearing or transfer hopper overflow caused by foreign objects in the belt system, improve the depth of the combination of intelligent means and business, and better meet the business needs of the scene. It has a wide range of application scenarios and markets, and provides effective means for industrial and mining enterprises to improve the level of stable operation control of belt systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] In the figure, 1 is the front belt; 2 is the middle belt; 3 is the tail belt; 4 is the first transfer hopper; 5 is the second transfer hopper; 6 is the storage bin; 7 is the first hopper mechanical overflow detector; 8 is the second hopper mechanical overflow detector; 9 is the image monitoring camera for the middle of the first belt; 10 is the image monitoring camera for the tail of the first belt; 11 is the image monitoring camera for the head of the first belt; 12 is the image monitoring camera for the middle of the second belt; 13 is the image monitoring camera for the tail of the second belt; 14 is the image monitoring camera for the head of the second belt; 15 is the image monitoring camera for the middle of the third belt; 16 is the image monitoring camera for the tail of the third belt; and 17 is a foreign object on the belt. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0021] The method of automatic closed-loop processing of foreign body alarm detected on the transport belt of the present invention is to automatically process the foreign body alarm in a closed-loop manner, identify the foreign body for the first time in the belt process, automatically calculate the time when the foreign body arrives at each transfer hopper and the next monitoring point according to the belt process and belt speed (generally a fixed value), strengthen the monitoring of the transfer hopper in the corresponding time period, and finally automatically track whether the foreign body has left the system, so as to realize automatic closed-loop management of foreign body detection alarm. The method is as follows:

[0022] 1. The foreign body exit system (judged by the image recognition result of the last belt in the process) automatically handles the series of foreign body alarms generated by the foreign body; at the same time, it shows that the foreign body recognition is accurate and effective.

[0023] 2. There are two possibilities if the foreign object has not left the system:

[0024] 2.1 Foreign body identification errors are usually caused by small pieces of abnormal color materials;

[0025] 2.2 Foreign body recognition is normal

[0026] 2.2.1 Foreign matter may be buried in the material and leave the system;

[0027] 2.2.2 Foreign objects may be stuck in the transfer bucket. This situation requires special attention. First, it may cause the belt to tear, and second, it may cause the transfer bucket to be blocked. According to the belt process, the system automatically calculates the time when foreign objects arrive at each transfer bucket, monitors belt tearing (identifying by material surface traces and comparing with normal material surface) and material overflow, and continuously monitors for a certain period of time to ensure that abnormalities are discovered in time and the system operates normally without risk.

[0028] If no belt tear is detected within the set time (identified by material surface marks and compared with the normal material surface) and no material overflow occurs in the transfer hopper (comprehensive judgment by visual monitoring and mechanical detection), the series of alarms will be automatically released; if belt tear is detected (identified by material surface marks and compared with the normal material surface) or material overflow occurs in the transfer hopper, the interlocking belt operation control will immediately stop to avoid the expansion of the fault and achieve the purpose of protecting the belt line.

[0029] As shown in the figure, the belt of the present invention includes a front belt 1, an intermediate belt 2 and a tail belt 3. A first transfer hopper 4 is provided between the front belt 1 and the intermediate belt 2, and a second transfer hopper 5 is provided between the intermediate belt 2 and the tail belt 3; the first transfer hopper 4 is provided with a first hopper mechanical overflow material detector 7, and the second transfer hopper 5 is provided with a second hopper mechanical overflow material detector 8; a storage bin 6 is provided at the end of the tail belt 3.

[0030] The front belt 1 is provided with a first belt middle image monitoring camera 9 and a first belt tail image monitoring camera 10, the middle belt 2 is provided with a first belt head image monitoring camera 11, a second belt middle image monitoring camera 12 and a second belt tail image monitoring camera 13, the tail belt 3 is provided with a second belt head image monitoring camera 14, a third belt middle image monitoring camera 15 and a third belt tail image monitoring camera 16, and foreign objects 17 on the belt are detected by cameras and detectors.

[0031] Based on the common implementation of foreign object monitoring in the industry, the present invention improves the integration of functions and services through a business extension algorithm, thereby achieving consistency between belt line visual monitoring and belt line business management requirements, thereby meeting business management requirements without increasing the workload of post personnel.

[0032] The present invention first identifies foreign objects (referring to large pieces, special-shaped flakes or strips that are different from normal materials) and realizes continuous monitoring of the whole process and key links (transfer hopper) of foreign objects in the process according to the belt process information. This method can effectively monitor the belt tearing or transfer hopper overflow caused by foreign objects in the belt system, improve the depth of the combination of intelligent means and business, and better meet the business needs of the scene. It has a wide range of application scenarios and markets, and provides effective means for industrial and mining enterprises to improve the level of stable operation control of belt systems.

Claims

1. A method for automatic closed-loop processing of foreign object alarms detected on a conveyor belt, characterized in that: When foreign objects are first identified in the belt process, the time it takes for the foreign objects to arrive at each transfer hopper and the next monitoring point is automatically calculated based on the belt process and belt speed. The transfer hopper is monitored more closely during the corresponding time period, and the system automatically tracks whether the foreign objects have left the system, thus achieving automatic closed-loop management of foreign object detection alarms.

2. The method for automatic closed-loop processing of foreign object alarm detected on a conveyor belt according to claim 1, characterized in that: The belt speed is calculated using a fixed value.

3. The method for automatic closed-loop processing of foreign object alarm detected on a conveyor belt according to claim 1, characterized in that: When tracking whether the foreign object has left the system, if the foreign object has left the system, a series of foreign object alarms generated by the foreign object will be automatically processed; at the same time, it indicates that the foreign object identification is accurate and effective; the foreign object leaving the system is determined by the image recognition result of the last belt in the process.

4. The method for automatic closed-loop processing of foreign body alarm detected on a conveyor belt according to claim 1, characterized in that: When tracking whether the foreign object has left the system, the foreign object has not left the system. Case 1: foreign object identification error caused by a small piece of abnormal color material.

5. The method for automatic closed-loop processing of foreign object alarm detected on a conveyor belt according to claim 1, characterized in that: When tracking whether the foreign body has left the system, the foreign body has not left the system, situation 2: the foreign body is buried in the material and leaves the system; or the foreign body is stuck in the transfer bucket.

6. The method for automatic closed-loop processing of foreign matter alarm detected on a conveyor belt according to claim 4, characterized in that: The foreign matter stuck in the transfer bucket may cause belt tearing or material blockage in the transfer bucket. According to the belt process, the system automatically calculates the time for the foreign matter to reach each transfer bucket, monitors belt tearing and material overflow, and continuously monitors for a certain period of time to ensure that abnormalities are discovered in time and that the system operates normally without risk.

7. The method for automatic closed-loop processing of foreign matter alarm detected on a conveyor belt according to claim 6, characterized in that: If no belt tear is detected within the set time and no material overflows in the transfer hopper, the series of alarms will be automatically released; if belt tear is detected or material overflows in the transfer hopper, the interlocked belt operation control will immediately stop to avoid the expansion of the fault and protect the belt line.

8. The method for automatic closed-loop processing of foreign body alarm detected on a conveyor belt according to claim 6 or 7, characterized in that: The belt tear is identified by the surface traces of the material and compared with the normal material surface; the material spill is judged comprehensively through visual monitoring and mechanical testing.

9. The method for automatic closed-loop processing of foreign object alarm detected on a conveyor belt according to claim 1, characterized in that: The belt comprises a front belt (1), an intermediate belt (2) and a tail belt (3); a first transfer hopper (4) is provided between the front belt (1) and the intermediate belt (2), and a second transfer hopper (5) is provided between the intermediate belt (2) and the tail belt (3); the first transfer hopper (4) is provided with a first hopper mechanical overflow detector (7), and the second transfer hopper (5) is provided with a second hopper mechanical overflow detector (8); a storage bin (6) is provided at the end of the tail belt (3).

10. The method for automatic closed-loop processing of foreign matter alarm detected on a conveyor belt according to claim 9, characterized in that: The front belt (1) is provided with a first belt middle image monitoring camera (9) and a first belt tail image monitoring camera (10), the middle belt (2) is provided with a first belt head image monitoring camera (11), a second belt middle image monitoring camera (12) and a second belt tail image monitoring camera (13), the tail belt (3) is provided with a second belt head image monitoring camera (14), a third belt middle image monitoring camera (15) and a third belt tail image monitoring camera (16), and foreign matter (17) on the belt is detected by means of the camera and the detector.

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