阅读说明：本技术 输送带撕裂监测装置、带有撕裂监测装置的输送线及其监测方法 (Conveying belt tearing monitoring device, conveying line with tearing monitoring device and monitoring method of conveying line ) 是由 王银 于 2020-12-29 设计创作，主要内容包括：本发明属于输送带检测的技术领域,具体涉及防撕裂装置、带有防撕裂装置的输送线及其监测方法。本发明采用红外检测结合光学深度探测技术,既保证了输送带在发生撕裂之前输送带的局部产生的发热的现象能够被获取和感知,又对输送带的撕裂深度进行检测,以弥补红外检测无法及时的对输送带撕裂破损进行报警,以及检测结果的不准确的不足,提高对于输送带撕裂监测的准确性和高效性,同时,通过不断增加的样本库,增加自身的系统的学习能力,同时也能增加系统的分析能力。此外,深度检测机构不仅实现了对输送带撕裂的检测,还能够及时获取造成输送带撕裂的货物信息,从而对输送线的参数进行调整,进而保证了输送线的运行稳定。(The invention belongs to the technical field of conveyor belt detection, and particularly relates to an anti-tearing device, a conveyor line with the anti-tearing device and a monitoring method of the conveyor line. The invention adopts the infrared detection and the optical depth detection technology, thereby not only ensuring that the heating phenomenon generated locally on the conveyer belt can be acquired and sensed before the conveyer belt is torn, but also detecting the tearing depth of the conveyer belt, so as to make up the defects that the infrared detection cannot alarm the tearing and the damage of the conveyer belt in time and the detection result is inaccurate, improve the accuracy and the high efficiency of the monitoring of the tearing of the conveyer belt, simultaneously, the learning capability of the system per se is increased through the continuously increased sample library, and simultaneously, the analysis capability of the system can also be increased. In addition, degree of depth detection mechanism has not only realized the detection to the conveyer belt is torn, can also in time acquire the goods information that causes the conveyer belt to tear to adjust the parameter of transfer chain, and then guaranteed the operation stability of transfer chain.)

1. Monitoring devices is torn to conveyer belt, its characterized in that includes installed part, infrared detection mechanism and degree of depth detection mechanism, the installed part is installed on the frame of conveyer belt, infrared detection mechanism with degree of depth detection mechanism orientation the conveyer belt, infrared detection mechanism with degree of depth detection mechanism all installs on the installed part.

2. The conveyor belt tear monitoring device of claim 1, wherein the infrared detection mechanism is a thermal imaging camera and the depth detection mechanism is a depth camera.

3. The conveyor belt tear monitoring device of claim 1, further comprising a high speed image capturing mechanism mounted on the mounting member and facing the conveyor belt.

4. The conveyor belt tear monitoring device of claim 3, wherein the high-speed image capture mechanism is a high-speed camera.

5. Conveying line with tear monitoring devices, characterized in that, includes frame, conveyer belt, power device, tensioning part and at least one conveyer belt tear monitoring devices of claim 1, the conveyer belt connect the power device with the tensioning part and stride establish on the frame, conveyer belt tear monitoring devices installs on the support body of frame, just conveyer belt tear monitoring devices's detection direction is towards the upper strata the back of conveyer belt and upper strata the front of conveyer belt.

6. The conveyor line with the tear monitoring device according to claim 5, wherein the mounting member includes an upper mounting portion and a lower mounting portion, the upper mounting portion is located above the upper layer of the conveyor belt, the lower mounting portion is located between the conveyor belts, the infrared detection mechanism is mounted on the upper mounting portion, a detection direction of the infrared detection mechanism faces a back surface of the upper layer of the conveyor belt, the depth detection mechanism is mounted on the lower mounting portion, and a detection direction of the depth detection mechanism faces a front surface of the upper layer of the conveyor belt.

7. The conveying line with the tear monitoring device according to claim 5, further comprising a high-speed image capturing mechanism, wherein the high-speed image capturing mechanism is mounted on the upper mounting portion, and a detection direction of the high-speed image capturing mechanism faces the back surface of the conveying belt on the upper layer.

8. The conveyor line with tear monitoring device of claim 5 wherein the tension section includes a tension roller and a tension frame, the tension roller being mounted on the tension frame; the power device comprises a motor and a transmission roller, and the motor drives the transmission roller to rotate; the frame is also provided with a plurality of lifting rollers.

9. The monitoring method for tearing of the conveyer belt is applied to the conveyer belt with the tearing monitoring device according to any one of claims 5 to 8, and is characterized by comprising the following steps:

step S1: an infrared detection mechanism collects heat infrared images on the conveying belt;

step S2: graying the thermal infrared image obtained in the step S1 to obtain a grayscale image;

step S3: carrying out binarization processing on the gray level image of the step S2 to obtain a binarized image;

step S4: the depth detection mechanism collects a depth 3D image of the conveying belt;

step S5: performing depth image processing on the depth 3D map of the step S4 to obtain a depth map;

step S6: performing image morphology processing on the binarized image of the step S3 and the depth map of the step S5 to respectively obtain a highlight difference map and a depth difference map;

step S7: comparing the image similarity of the highlight difference image and the depth difference image in the step S6 with the images in the sample library, and comparing the relative temperature of the temperature data acquired by the infrared detection mechanism;

step S8: when any one of the highlight difference map and the depth difference map reaches a similarity threshold value or the temperature data reaches a temperature threshold value, the step S9 is executed; the highlight difference image and the depth difference image do not reach a similarity threshold value, and if the temperature data do not reach the temperature threshold value, information data collected by the conveyor belt tearing monitoring device are removed;

step S9: carrying out quantity statistics on the highlight difference graphs entering the step;

step S10: judging the length and the width of the highlight difference image,

step S11: step S12 is carried out if the length and width value of the highlight difference map exceeds the preset length and width parameter, and the information data collected by the conveyor belt tearing monitoring device are removed if the length and width value of the highlight difference map is within the preset length and width parameter;

step S12: and storing the highlight difference image and the depth difference image into a sample library, and sending a tearing alarm signal.

Technical Field

The invention belongs to the technical field of conveyor belt detection, and particularly relates to an anti-tearing device, a conveyor line with the anti-tearing device and a monitoring method of the conveyor line.

Background

The belt conveying mode is an important mode for transporting materials in ports, steel plants and other related enterprises, and due to the fact that complicated industrial and mining conditions and abnormally transported materials can cause longitudinal tearing accidents of the conveying belt under unexpected conditions, if the materials are found out untimely, the whole belt can be torn and damaged, and huge economic loss is caused. In order to solve the technical problem, a plurality of methods are proposed at home and abroad for tear-resistant detection of the conveyer belt, such as an ultrasonic method (detecting ultrasonic wave propagation in a belt medium), abnormal bearing roller stress detection (analyzing abnormal states of bearing roller stress), a piezoresistor method (detecting leakage below the belt), machine vision (extracting characteristics of belt tearing and judging according to an intelligent algorithm) and the like.

The machine vision mode is a detection means proposed in recent years, and has the advantages of non-contact mode, no need of modifying conveying belt equipment and convenience in installation. However, due to the complexity of the image processing algorithm, the operation requirement of online real-time detection cannot be met, and meanwhile, the display of the image is inaccurate due to many influence factors of visible light, such as dust, fog and the like, and the whole detection result is inaccurate from the source. Even the influence factor of environment has been solved, it is also not enough to be can be timely tear the damage to the conveyer belt and report to the police to rely on infrared or visible light alone, and the conveyer belt is torn or the damage is the proruption incident, simultaneously because monitoring facilities's mounted position leads to only tearing when taking place and run through the belt at the conveyer belt indulges, could monitored by monitoring facilities monitor. Finally, the machine vision type detection method in the prior art cannot accurately detect the tear on the conveying line in an all-around and high-efficiency manner, so that the conveying efficiency of the conveying line is also affected.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a conveyer belt tearing monitoring device, aiming at solving the technical problem that the conveying efficiency of a conveying line is also influenced because the tearing on the conveying line cannot be accurately detected in an all-round and high-efficiency manner by a machine vision type detection mode in the prior art. In addition, the invention also provides a conveying line with the tearing monitoring device and a monitoring method thereof.

The invention provides a conveyer belt tearing monitoring device, which has the following specific technical scheme:

monitoring devices is torn to conveyer belt, including installed part, infrared detection mechanism and degree of depth detection mechanism, the installed part is installed on the frame of conveyer belt, infrared detection mechanism with degree of depth detection mechanism orientation the conveyer belt, infrared detection mechanism with degree of depth detection mechanism all installs on the installed part.

In some embodiments, the infrared detection mechanism is a thermal imaging camera and the depth detection mechanism is a depth camera.

In some embodiments, the device further comprises a high-speed image capturing mechanism, wherein the high-speed image capturing mechanism is mounted on the mounting member and faces the conveying belt.

In some embodiments, the high-speed image capturing mechanism is a high-speed camera.

By adopting an infrared detection and optical depth detection technology, the influence of the field working condition environment on image acquisition can be reduced through the principle of thermal imaging, the non-contact characteristic is realized, and the defects that infrared detection or visible light detection cannot timely alarm the tearing and damage of the conveying belt and the detection result is inaccurate can be overcome.

The invention also provides a conveying line with the tearing monitoring device, which comprises a frame, a conveying belt, a power device, a tensioning part and at least one conveying belt tearing monitoring device, wherein the conveying belt is connected with the power device and the tensioning part and strides over the frame, the conveying belt tearing monitoring device is arranged on a frame body of the frame, and the detection direction of the conveying belt tearing monitoring device faces to the back surface of the conveying belt on the upper layer and the front surface of the conveying belt on the upper layer.

In some embodiments, the mounting member includes an upper mounting portion and a lower mounting portion, the upper mounting portion is located on the upper layer above the conveyer belt, the lower mounting portion is arranged between the conveyer belts, the infrared detection mechanism is mounted on the upper mounting portion, a detection direction of the infrared detection mechanism faces the upper layer, a back face of the conveyer belt, the depth detection mechanism is mounted on the lower mounting portion, and a detection direction of the depth detection mechanism faces the upper layer, a front face of the conveyer belt.

In some embodiments, the device further comprises a high-speed image capturing mechanism, the high-speed image capturing mechanism is mounted on the upper mounting portion, and a detection direction of the high-speed image capturing mechanism faces the back surface of the upper layer of the conveying belt.

In some embodiments, the tensioning section comprises a tensioning roller and a tensioning frame, the tensioning roller being mounted on the tensioning frame; the power device comprises a motor and a transmission roller, and the motor drives the transmission roller to rotate; the frame is also provided with a plurality of lifting rollers.

By adopting the infrared detection and optical depth detection technology, the influence of the field working condition environment on image acquisition can be reduced through the principle of thermal imaging, the non-contact characteristic is achieved, the defects that infrared detection or visible light detection cannot timely alarm the tearing damage of the conveying belt and the detection result is inaccurate can be overcome, and therefore the conveying efficiency of the conveying line is improved. In addition, not only has realized the detection to the tearing of conveyer belt through the degree of depth detection mechanism that is located upper conveyer belt top, can also in time acquire the goods depth information that causes the tearing of conveyer belt to adjust the parameter of transfer chain, and then guaranteed the operation stability of transfer chain.

In addition, the invention also provides a monitoring method for tearing the conveying belt, which is applied to the conveying line with the tearing monitoring device and comprises the following steps:

step S1: an infrared detection mechanism collects heat infrared images on the conveying belt;

step S2: graying the thermal infrared image obtained in the step S1 to obtain a grayscale image;

step S3: carrying out binarization processing on the gray level image of the step S2 to obtain a binarized image;

step S4: the depth detection mechanism collects a depth 3D image of the conveying belt;

step S5: performing depth image processing on the depth 3D map of the step S4 to obtain a depth map;

step S6: performing image morphology processing on the binarized image of the step S3 and the depth map of the step S5 to respectively obtain a highlight difference map and a depth difference map;

step S7: comparing the image similarity of the highlight difference image and the depth difference image in the step S6 with the images in the sample library, and comparing the relative temperature of the temperature data acquired by the infrared detection mechanism;

step S8: if the highlight difference graph reaches the similarity threshold, the step S9 is carried out; if the depth difference map reaches the similarity threshold, the process proceeds to step S12; the highlight difference image and the depth difference image do not reach a similarity threshold value, and if the temperature data do not reach the temperature threshold value, information data collected by the conveyor belt tearing monitoring device are removed;

step S9: carrying out quantity statistics on the highlight difference graphs entering the step;

step S10: judging the length and the width of the highlight difference image,

step S11: step S12 is carried out if the length and width value of the highlight difference map exceeds the preset length and width parameter, and the information data collected by the conveyor belt tearing monitoring device are removed if the length and width value of the highlight difference map is within the preset length and width parameter;

step S12: and storing the highlight difference image and the depth difference image into a sample library, and sending a tearing alarm signal.

The invention adopts the infrared detection and optical depth detection technology, can make up for the missing judgment of the infrared detection, improves the accuracy and the high efficiency of the tearing monitoring of the conveyer belt, and in addition, the learning capacity of the system is increased through the continuously increased sample library, and the analysis capacity of the system can also be increased.

Drawings

FIG. 1 is a conveyor line with a tear monitoring device provided in accordance with the present invention;

FIG. 2 is a schematic plan view showing the structure of embodiment 1 of the present invention;

fig. 3 is a flowchart of a method for monitoring tearing of a conveyor belt according to embodiment 3 of the present invention;

fig. 4 is a thermal infrared image of a normal and intact conveyer belt in the conveyer belt tearing monitoring method provided in embodiment 3 of the present invention;

fig. 5 is a thermal infrared image of an un-torn conveyer belt in the conveyer belt tearing monitoring method provided in embodiment 3 of the present invention;

FIG. 6 is a highlight disparity map of FIG. 5 after processing;

fig. 7 is a thermal infrared image of a torn conveyer belt in the conveyer belt tearing monitoring method provided in embodiment 3 of the present invention;

FIG. 8 is a highlight disparity map of FIG. 7 after processing;

fig. 9 is a thermal infrared image of a torn conveyor belt in the method for monitoring tearing of a conveyor belt according to embodiment 3 of the present invention;

FIG. 10 is a highlight disparity map of FIG. 9 after processing.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to specific embodiments 1 to 10, and with reference to the accompanying drawings.

Example 1

As shown in fig. 2, the conveyer belt tearing monitoring device provided by this embodiment has the following specific technical solutions:

monitoring devices is torn to conveyer belt, including installed part, infrared detection mechanism 4 and degree of depth detection mechanism 2, the installed part is installed on the frame 9 of conveyer belt, and infrared detection mechanism 4 and degree of depth detection mechanism 2 are all installed on the installed part towards the conveyer belt, infrared detection mechanism 4 and degree of depth detection mechanism 2. Through the setting of infrared detection mechanism 4, the phenomenon of generating heat of the local production of conveyer belt before taking place to tear has been guaranteed to the conveyer belt can be acquireed and the perception to can early warning the tearing condition of conveyer belt in advance, utilize degree of depth detection mechanism 2 to detect the tearing degree of depth of conveyer belt, tear the damage and report to the police to the conveyer belt with remedying infrared detection or visible light detection can't be timely, and the inaccurate not enough of testing result.

Specifically, the infrared detection mechanism 4 is a thermal imaging camera, and the depth detection mechanism 2 is a depth camera.

In some embodiments, the device further comprises a high-speed image capturing mechanism 5, wherein the high-speed image capturing mechanism 5 is mounted on the mounting member, and the high-speed image capturing mechanism 5 faces the conveying belt. The high-speed image capturing mechanism 5 is used for performing image capturing recording on the running process of the conveying belt, is convenient for review and re-coiling, and inspects the reason for tearing the conveying belt.

Specifically, the high-speed image capturing mechanism 5 is a high-speed camera.

Example 2

As shown in fig. 1, the conveyor line with the tear monitoring device provided in this embodiment includes a frame 9, conveyor belts (an upper conveyor belt 3 and a lower conveyor belt 7), a power device 10, a tensioning portion 8, and at least one conveyor belt tear monitoring device of embodiment 1, the conveyor belt connects the power device 10 and the tensioning portion 8 and spans over the frame 9, the conveyor belt tear monitoring device is installed on a frame body of the frame 9, and a detection direction of the conveyor belt tear monitoring device faces a back surface of the upper conveyor belt 3 and a front surface of the upper conveyor belt 3. So all have all-round and efficient control to the back and the front of upper conveyer belt 3, in time acquire the goods information that causes the conveyer belt to tear simultaneously to adjust the parameter of transfer chain, and then guaranteed the operation stability of transfer chain.

Further, the installed part includes installation department 1 and lower installation department 6, and installation department 1 is located the top of upper conveyer belt 3 on going up, and lower installation department 6 is arranged in between the conveyer belt, and infrared detection mechanism 4 installs on installation department 1, and infrared detection mechanism 4's direction of detection is towards the back of upper conveyer belt 3, and degree of depth detection mechanism 2 installs in lower installation department 6, and degree of depth detection mechanism 2's direction of detection is towards the front of upper conveyer belt 3. The last installation department 1 and the lower installation department 6 of installed part all have all-round and efficient control to provide the structure basis for realizing the back and the front of upper conveyer belt 3.

Further, the device also comprises a high-speed image capturing mechanism 5, wherein the high-speed image capturing mechanism 5 is mounted on the upper mounting part 1, and the detection direction of the high-speed image capturing mechanism 5 faces the back surface of the upper-layer conveying belt 3. The high-speed image capturing mechanism 5 is used for capturing images of the whole running process of the conveying belt at a high speed, so that not only is comprehensive monitoring realized, but also the reason for tearing the conveying belt is conveniently checked.

Further, the tensioning part 8 comprises a tensioning roller and a tensioning frame, and the tensioning roller is mounted on the tensioning frame; the power device 10 comprises a motor and a transmission roller, and the motor drives the transmission roller to rotate; a plurality of lifting rollers are also arranged on the frame 9. The conveying line is also provided with a feeding part 11 and a discharging part 12, the feeding part 11 is erected on the frame 9 and is arranged on one side close to the tensioning part 8, and the discharging part 12 is arranged at one end of the power device 10.

Example 3

The method for monitoring tearing of a conveyor belt provided in this embodiment is applied to the conveyor line with the tearing monitoring device of embodiment 2, as shown in fig. 3, and includes the following steps:

step S1: the infrared detection mechanism 4 collects heat infrared images on the conveying belt;

step S2: graying the thermal infrared image obtained in the step S1 to obtain a grayscale image;

step S3: carrying out binarization processing on the gray level image of the step S2 to obtain a binarized image;

step S4: the depth detection mechanism 2 collects a depth 3D image of the conveying belt;

step S5: performing depth image processing on the depth 3D map of the step S4 to obtain a depth map;

step S6: performing image morphology processing on the binarized image of the step S3 and the depth map of the step S5 to respectively obtain a highlight difference map and a depth difference map;

step S7: comparing the image similarity of the highlight difference image and the depth difference image in the step S6 with the images in the sample library, and comparing the relative temperature of the temperature data acquired by the infrared detection mechanism 4;

step S8: if the highlight difference graph reaches the similarity threshold, the step S9 is executed; if the depth difference map reaches the similarity threshold, the process proceeds to step S12; if the highlight difference image and the depth difference image do not reach the similarity threshold value and the temperature data do not reach the temperature threshold value, removing the information data collected by the conveyor belt tearing monitoring device;

step S9: carrying out quantity statistics on the highlight difference graphs entering the step;

step S10: the length and the width of the highlight difference image are judged,

step S11: if the length and width values of the highlight difference map exceed the preset length and width parameters, the step S12 is carried out, and if the length and width values of the highlight difference map are within the preset length and width parameters, the information data collected by the conveyor belt tearing monitoring device are removed;

step S12: storing the highlight difference image and the depth difference image into a sample library, and sending a tearing alarm signal.

Judging abnormal temperature display according to a real-time change curve of the surface temperature of the conveying belt and then according to a temperature characterization algorithm model, if abnormal temperature exists, performing characteristic processing on a thermal imaging graph and a depth graph, wherein the thermal imaging graph shows a strip-shaped high-brightness area (shown in figures 4-10) after being processed, and finally performing similarity comparison with a defect sample library in a tearing monitoring system, wherein the similarity is more than 70%, and the system is primarily judged to be torn. And then, reading the depth of the initially determined tearing area by using a depth 3D image, wherein the depth difference between the area and other areas reaches a certain degree, the depth difference area is also in a strip shape, the area can be determined as longitudinal tearing, the abnormal pushing reminding of the surface of the conveying belt is carried out, meanwhile, the thermal imaging image and the depth image are pushed to a terminal, and the system carries out the alarm of the tearing of the surface of the conveying belt. Meanwhile, the depth detection mechanism 2 not only realizes the detection of the tearing of the conveying belt, but also can timely acquire the cargo depth information causing the tearing of the conveying belt, timely adjusts the detailed transportation parameters of the cargo causing the tearing of the conveying belt, and guarantees the transportation efficiency. In addition, the abnormal images can be recorded in the defect sample library at the same time, so that the sample library is continuously abundant. As the running time increases and more systems are deployed, a sample library can be networked and shared among a plurality of tearing systems, and tearing accidents and conveyor belt surface anomalies can be detected more quickly.

The above description is only for the purpose of illustrating preferred embodiments of the present invention and is not to be construed as limiting the invention, and the present invention is not limited to the above examples, and those skilled in the art should also be able to make various changes, modifications, additions or substitutions within the spirit and scope of the present invention.