JP2021179368A - Belt deterioration diagnosis device - Google Patents

Abstract

To provide a belt deterioration diagnosis device that diagnoses deterioration of a versatile belt without using a special belt.SOLUTION: A belt deterioration diagnosis device comprises: an imaging device 30 that is arranged to face a slip mounting surface of a belt, and images a predetermined position of the belt; a storage unit 110 that stores the image of the belt imaged by the imaging device 30 in association with position information of the imaged belt and time information of the imaging; and a belt deterioration determination unit 105 that reads out the images before and after the image of the belt at the same position from the storage unit 110 in chronological order, determines an image at the same position of the belt, and determines whether the deterioration is progressing.SELECTED DRAWING: Figure 2

Description

The present invention relates to a belt deterioration diagnosis device for diagnosing deterioration of a belt of a belt conveyor.

A belt conveyor is used to remove soil from tunnel construction. The belt of a belt conveyor is mainly made of rubber or resin, and the surface of the belt wears and becomes thin due to repeated use. If this is used continuously without repair, the belt may be damaged or broken. For this reason, damage to the belt is inspected, and the damaged belt is replaced to prevent the belt from being cut.

Patent Document 1 discloses a belt conveyor flaw detector that captures an image of the surface of a belt and determines the presence or absence of a damaged region of the belt from the captured image of the belt.

In the above-mentioned belt conveyor flaw detector, the image pickup device is arranged to face the slip mounting surface of the belt, a predetermined portion of the belt is continuously imaged, and the presence or absence of a damaged region of the belt is determined from the captured image.

The above-mentioned belt conveyor flaw detector can determine damage to the belt. However, according to this technique, although the damage of the belt can be determined, it cannot be predicted that the deterioration of the belt will progress and the abnormality of the belt will occur in the future.

By the way, the belt of the belt conveyor deteriorates according to the traveling speed and the cumulative traveling time. Therefore, a method of predicting the deterioration of the belt based on the traveling speed and the cumulative time of the belt conveyor can be considered. However, the deterioration of the belt of the belt conveyor is promoted not only by the traveling speed and the cumulative time, but also by the impact at the time of throwing in the transported object such as soil removal and the shape of protrusions and the like.

Patent Document 2 discloses a belt capable of predicting deterioration and a belt deterioration prediction system.

In the belt deterioration prediction system of Patent Document 2, a strain sensor is provided on the belt, and the elongation of the belt is detected by the output of the strain sensor. The relationship between belt elongation and deterioration is memorized in advance, and deterioration is predicted based on the belt elongation.

Japanese Unexamined Patent Publication No. 2009-46852 Japanese Unexamined Patent Publication No. 2019-56627

However, the deterioration of the belt causes a change in the state of the surface of the belt before the elongation of the belt occurs. The deterioration of the belt is caused not only by the elongation of the belt but also by the wear and scratches on the surface of the belt made of rubber or resin of the belt.

In the above-mentioned Patent Document 2, deterioration due to a change in the state of the surface of the belt cannot be predicted.

Further, in Patent Document 2, it is necessary to use a special belt provided with a strain sensor, which causes problems such as lack of versatility and high cost.

Therefore, it is an object of the present invention to provide a belt deterioration diagnosis device for diagnosing deterioration of a versatile belt without using a special belt.

The belt deterioration diagnosis device according to the embodiment of the present invention is arranged so as to face the slip mounting surface of the belt, and has an image pickup device that captures a predetermined portion of the belt and an image captured by the image pickup device. The storage unit that stores the imaged belt position information and the imaged time information in association with each other, and the images of the belt at the same position at the same position are read out in chronological order from the images captured before and after, and the belt is at the same position. The belt deterioration determination unit for determining whether or not the deterioration is progressing is provided, and the deterioration state of the belt is determined.

Further, in the belt deterioration diagnosis device according to the embodiment of the present invention, a marker is provided on the belt, and a position for specifying the position of the belt imaged by the image pickup device based on the marker provided on the belt. A calculation unit is provided, and the position calculation unit is associated with the image pickup data captured by the image pickup device and stored in the storage unit, and the image pickup data at the same position is read out from the storage unit in time series. Can be done.

Further, the belt deterioration determination unit of the belt deterioration diagnosis device according to the embodiment of the present invention compares the images of the front and back of the belt at the same position read from the storage unit in chronological order, and the degree of progress of the deterioration of the belt. Can be configured to determine.

According to the belt deterioration diagnosis device according to the present invention, whether or not the deterioration of the belt is progressing by reading out the images before and after the belt at the same position in time series and determining the images at the same position of the belt. You can judge.

It is a side view which showed the belt conveyor apparatus and the belt deterioration diagnosis apparatus which concerns on 1st Embodiment of this invention. It is a block diagram which shows the structure of the belt deterioration diagnosis apparatus which concerns on 1st Embodiment of this invention. It is explanatory drawing which shows the image pickup apparatus part of the belt deterioration diagnosis apparatus which concerns on 1st Embodiment of this invention. It is a schematic cross-sectional view which shows an example of a belt. It is a schematic diagram which shows the initial state of deterioration of a belt. It is a schematic diagram which shows the medium-term state of deterioration of a belt. It is a schematic diagram which shows the late state of the deterioration of a belt.

Hereinafter, the belt deterioration diagnostic apparatus 10 according to the present invention will be described with reference to the drawings.

FIG. 1 shows a first embodiment of the belt deterioration diagnostic apparatus according to the present invention. FIG. 2 is a block diagram showing a configuration of a belt deterioration diagnosis device according to the first embodiment of the present invention. The belt deterioration diagnostic apparatus according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2.

The belt deterioration diagnosis device 10 according to the first embodiment of the present invention diagnoses the deterioration of the belt 29 during the operation of the belt conveyor 20 that conveys the slip (conveyed object) 5 generated during excavation of the ground. That is, the image of the surface of the belt 29 is stored in the storage unit in chronological order, the surface image of the belt 29 is discriminated in chronological order, the progress state of the belt 29 such as wear and scratch is discriminated, and the deterioration is diagnosed.

The belt deterioration diagnosis device 10 and the belt conveyor 20 are used for tunnel excavation work and the like. In tunnel excavation work, excavators such as shield machines are used. The case where this belt deterioration diagnosis device 10 is used in the shield method using a shield machine will be described as an example.

In the shield method, the shield tunnel 3 is constructed by sequentially advancing the shield machine 1 while excavating the face 2 by the shield machine 1 and assembling a segment behind the shield machine 1.

The slip 5 generated by excavating the face 2 is mounted on the slip mounting surface 29a of the belt conveyor 20 and is conveyed to the wellhead 4 of the shield tunnel 3 by the belt conveyor 20. At the wellhead 4, the scrap 5 conveyed by the belt conveyor 20 is transferred to the belt conveyor 9, and the slip 5 is carried out to the ground by the belt conveyor 9 through a vertical pile or the like.

The belt deterioration diagnosis device 10 can be applied to a ground excavation method other than the shield method or a belt conveyor device used for transporting ore or the like.

The belt deterioration diagnosis device 10 includes an image pickup device 30 that images the surface of the belt 29 of the belt conveyor 20, a control device 100, and the like. Further, it may be provided with an alarm device that operates when it is determined that the belt 29 is deteriorated and damaged.

The belt deterioration diagnosis device 10 is provided with a position calculation unit 102 (see FIG. 2) for specifying the position of the belt 29 imaged by the image pickup device 30 based on the marker 85 provided on the belt 29. The image captured by the image pickup apparatus 30 is stored in the storage unit 110 in association with the position information and the time information (see FIG. 2).

The belt deterioration diagnosis device 10 stores the image of the belt surface condition detecting unit 104, which determines the state of the surface of the belt from the image captured by the image pickup device 30, and the image of the belt at the same position in the storage unit. The belt deterioration determination unit 105 is provided (see FIG. 2), which reads out the front and rear images in series, determines the image at the same position of the belt, and determines whether or not the deterioration has progressed. As will be described later, the belt surface state detection unit 104 and the belt deterioration determination unit 105 are configured by, for example, a control device 100 including a personal computer or the like.

The control device 100 operates the functions of the belt surface state detection unit 104 and the belt deterioration determination unit 105 by a program. The belt surface state detection unit 104 determines the belt surface state by recognizing the captured image, and associates the recognized image data with the image related to the deterioration of the belt with the position data and the time information of the storage unit 110. It is stored in the belt position information and time information storage unit 110a and the belt surface image information storage unit 110b, respectively.

The belt deterioration determination unit 105 reads out the front and rear images in time series at the same position of the belt 29 from the image stored in the belt surface image information storage unit 110b, determines the image at the same position of the belt 29, and deteriorates. Is configured to determine if is progressing.

When a magnetic marker is used as the marker 85, it is composed of a magnetic marker for indicating a reference position on the belt conveyor 20 and a magnetic marker provided at predetermined intervals with respect to the magnetic marker, and the magnetic marker is configured by a magnetic detection unit. It is detected by the marker detection unit 120 (see FIG. 2), and is given to the position calculation unit 102. The position calculation unit 102 calculates the position of the belt 29 from the position of the magnetic marker and the transport speed of the belt conveyor 20, and specifies the position to be imaged by the image pickup apparatus 30.

When RFID (radio frequency identification identifier) technology is used as a marker, an RFID tag is provided on the belt conveyor 20 at predetermined intervals, a marker detection unit 120 composed of a reader for reading the RFID tag is provided, and an image pickup apparatus is provided. It can be configured to specify the position to be imaged by 30.

Next, the configuration of the belt conveyor 20 will be described.
The belt conveyor 20 has pulleys 23 and 24, a motor 28 and a belt 29. The pulley 23 is provided in the vicinity of the face 2, and the pulley 24 is provided in the wellhead 4.

The motor 28 rotates the pulley 24. The motor 28 is driven by a motor driver 101 (see FIG. 2).

The belt 29 is an endless belt, and when the motor 28 is operated, the belt 29 circulates. When the belt 29 is circulating, the slip 5 generated by the face 2 is placed on the slip mounting surface 29a of the belt 29 at the position of the pulley 23, and the slip 5 is conveyed from the pulley 23 to the pulley 24 by the belt 29.

The belt conveyor 9 is arranged from below the pulley 24 to the ground, and when the belt 29 is folded back by the pulley 24, the slip 5 is transferred from the belt 29 to the belt conveyor 9.

The image pickup apparatus 30 is arranged on the downstream side of the pulley 24. The image pickup apparatus 30 images the surface of the slip mounting surface 29a of the belt 29.

Next, the image pickup apparatus 30 will be described.
The image pickup apparatus 30 is arranged on the downstream side of the pulley 24 and on the upstream side of the pulley 23 so as to face the slip mounting surface 29a of the belt 29. The image pickup device 30 continuously images a predetermined portion of the belt 29, and sequentially outputs the captured images (still images) of the belt 29 to the control device 100 of the belt deterioration diagnosis device 10.

The control device 100 associates the position of the belt 29 calculated by the position calculation unit 102, which will be described later, with the captured image captured by the image pickup device 30. Further, the control device 100 also associates the time information captured by the image pickup device 30 with the captured image. The control device 100 stores the captured image in the storage unit 110 in association with the position information and the time information.

The control device 100 obtains captured images taken at the same position of the belt 29 in time series at different times, that is, and gives them to the storage unit 110. Based on the captured images captured in this time series, the belt deterioration determination unit 105 can determine the deterioration state of the belt 29.

The image pickup device 30 is composed of a camera 30a that images the surface of the belt and a pair of lighting devices 30b provided so as to sandwich the camera 30a. The lighting device 30b is driven and controlled by the lighting driving device 103 (see FIG. 2) of the control device 100, and irradiates the surface of the belt 29.

For example, the camera 30a includes an area-type solid-state image sensor, an optical lens that forms a part of an image of the belt 29 on the solid-state image sensor, and a part of the belt 29 that is imaged (photoelectrically converted) by the solid-state image sensor. It includes an image processing unit that converts an image into a digitally captured image. The imaging interval (frame rate) of the imaging device 30 is set so that the imaging range of a certain imaging timing and the imaging range of the next imaging timing partially overlap each other, or the imaging ranges are continuous without interruption. It is preferable that it is set to. In this embodiment, as shown in FIG. 3, a region of 1 m with respect to the moving direction of the belt can be imaged.

Image data obtained by capturing an image of this 1 m area is given to the control device 100. The belt surface state detection unit 104 of the control device 100 recognizes the captured image and detects the surface state of the belt. When all the image data is stored in the storage unit 110, the amount of data increases. Therefore, in this embodiment, when the control device 100 determines that the surface state has been worn or scratched to some extent, the image is stored by the position calculation unit 102. The position of the belt 29 and the time information at which the image is captured are associated with each other and stored in the storage unit 110. In other words, when it is determined that the surface of the belt 29 has deteriorated to some extent, the control device 100 stores the image data of the surface of the belt 29 for each operation number in the storage unit 110 at the same position of the belt 29. It is stored in the unit 110.

As described above, as shown in FIGS. 1 and 3, the lighting device 30b is arranged so as to sandwich the camera 30a of the image pickup device and face the slip mounting surface 29a of the belt 29. The lighting device 30b irradiates light (for example, visible light) on the slip mounting surface 29a of the belt 29, and the light emitting surface of the lighting device 30b is formed in, for example, a rectangular shape.

As the lighting device 30b, for example, an LED lighting device provided with an LED (Light Emitting Diode) is used, a diffuser plate is provided on the front surface of a plurality of LED elements, and diffused light is planarized from the diffuser plate onto the mounting surface 29a. Be irradiated. The lighting device 30b is arranged on the upstream side and the downstream side of the belt 29 so as to sandwich the camera 30a.

Since the lighting device 30b faces the slip mounting surface 29a of the belt 29, the illuminated portion of the slip mounting surface 29a is bright in a wide range and the uniformity of the illuminance distribution is high. It is preferable that the brightness distribution on the light emitting surface of the lighting device 30b is uniform.

The image pickup apparatus 30 periodically executes an image pickup process while the belt conveyor 20 is in operation. The cycle of the image pickup process by the image pickup apparatus 30 is set so that the image pickup range of the belt 29 in the image by one image pickup process and the image pickup range of the belt 29 in the image by the next image pickup process partially overlap each other. The imaging range of is set to be continuous without interruption.

The image obtained by the image pickup process of the image pickup device 30 is given to the belt surface state detection unit 104 of the control device 100 and the storage unit 110 described later.

FIG. 2 is a block diagram showing the configuration of the belt deterioration diagnosis device 10 according to the first embodiment of the present invention.

The control device 100 is composed of a personal computer having a CPU, GPU, ROM, RAM, and the like. An image pickup device 30, a motor driver 101, a marker detection unit 120, and a storage unit 110 are connected to the control device 100.

The storage unit 110 is a storage device including a semiconductor memory, a hard disk drive, or the like. The storage unit 110 is readable and writable by the control device 100. The storage unit 110 may be built in the housing of the control device 100 or may be externally attached. A program that can be executed by the control device 100 is stored in the storage unit 110. The program may be stored in the ROM of the control device 100.

Further, the storage unit 110 stores sample image data of various deterioration state patterns for use in image recognition. The belt surface state detection unit 104 compares the image data captured by the image pickup device 30 with the sample image pattern stored in the storage unit 110, determines whether or not the surface is the surface of the belt 29 for determining deterioration, and as a result, deteriorates. When it is determined that the surface of the belt 29 is to be determined, the captured image of the surface of the belt 29 is stored in the belt surface image information storage unit 110b of the storage unit 110.

The belt position information and time information storage unit 110a stores the captured image stored in the belt surface image information storage unit 110b, the captured position information, and information for associating the captured time information.

The belt deterioration determination unit 105 reads out the captured images before and after the captured images taken at the same position of the belt 29 from the belt surface image information storage unit 110b in chronological order, and determines the change in the captured image at the same position. Determine if the deterioration is progressing.

The belt 29 of the belt conveyor 20 is configured, for example, as shown in FIG. The belt 29 is provided with an upper cover rubber 291 and a lower cover rubber 292 so as to sandwich the core body 290 as a reinforcing material. The core body 290 includes a canvas belt made of a canvas made of polyester or nylon as a reinforcing material, and a steel cord belt made of a steel cord as a reinforcing material.

The cover rubber is mainly composed of rubber. Examples of the rubber include natural rubber, isoprene rubber (IR), butadiene rubber (BR), styrene-butadiene rubber (SBR), acrylonitrile-butadiene rubber (NBR), and mixtures thereof.

As described above, the surface of the upper cover rubber 291 of the belt 29 is worn and thinned by repeated use. When the surface of the upper cover rubber 291 becomes thin, the color, shape, pattern, and the like change. In this embodiment, sample images such as colors, shapes, and patterns according to the deterioration status are stored in the storage unit 110 as reference images in advance, and the captured images captured by the image pickup apparatus 30 are compared with the sample images in real time. However, it is configured to start the diagnosis of the deteriorated state and to limit the information to be stored in the storage unit 110. Further, even if the surface of the belt 29 is scratched, the deterioration diagnosis is performed.

Next, the processing of the control device 100 will be described.
The process executed by the control device 100 based on the program during the operation of the belt conveyor 20, that is, when the motor 28 is driven by the motor driver 101 will be specifically described below.

Every time an image is transferred from the image pickup device 30 to the control device 100, the control device 100 acquires the image transferred from the image pickup device 30 and gives it to the belt surface state detection unit 104 and the storage unit 110. The storage unit 110 stores sample image data of various deterioration state patterns for use in image recognition.

The belt surface state detection unit 104 compares the captured image and the sample image in real time, and detects the surface state of the belt. In this embodiment, when the control device 100 determines that the surface condition of the belt 29 is worn or scratched to some extent based on the detection result of the belt surface condition detecting unit 104, the control device 100 stores the captured image of the surface of the belt 29. It is stored in the belt surface image information storage unit 110b of 110.

Further, the belt position information and time information storage unit 110a stores the image captured in the belt surface image information storage unit 110b, the position information of the imaged belt 29, and the information for associating the imaged time information.

Further, the belt deterioration determination unit 105 reads out the front and back captured images in time series from the captured images obtained by capturing the belt 29 at the same position from the belt surface image information storage unit 110b, performs image recognition, and performs image recognition at the same position. The change in the captured image is judged, and it is judged whether or not the deterioration is progressing.

Based on the determination result of the belt deterioration determination unit 105, the control device 100 may be configured to operate an alarm device (not shown) when it is determined that the deterioration is progressing. As a result, the worker can be notified of the warning.

Further, when the alarm is activated, the control device 100 turns off the motor driver 101 and stops the motor 28. As a result, the belt conveyor 20 is stopped. The position calculation unit 102 calculates the positional relationship between the imaged region and the belt 29. From the data of the position calculation unit 102, it is possible to grasp the portion where the deterioration of the belt 29 has progressed. The operator can move the belt 29 to the specified portion where the deterioration of the belt 29 has progressed, and can confirm the portion where the deterioration of the belt 29 has progressed. Then, by replacing the belt according to the degree of deterioration of the belt 29, it is possible to prevent the belt from being damaged.

Next, a case where an RF tag is used as the marker 85 will be described.

Markers 85 composed of a plurality of RF tags are arranged on the belt 29 at regular intervals along the transport direction of the belt 29. Preferably, a marker 85 composed of these RF tags is provided on the edge of the belt 29.

The marker 85 composed of RF tags contains a memory, a control circuit, a transmitter, and the like, and the memory stores an identifier (identification number, identification code, etc.) individually assigned to each RF tag. Preferably, the RF tag is an active tag that has a built-in power supply and transmits an identifier by using the power of the power supply. Therefore, the communication distance between the marker detection unit 120 composed of the reader and the marker 85 composed of the RF tag, which will be described later, becomes long, and it is possible to prevent the reader from erroneously reading the identifier of the RF tag.

The marker detection unit 120 including the reader 80 will be described. The marker detection unit 120 including the reader 80 may be provided on the downstream side of the pulley 24 and on the upstream side of the image pickup apparatus 30.

The marker detection unit 120 including a reader has an antenna, a control circuit, and the like. Then, when the marker 85 composed of the RF tag passes in the vicinity of the marker detecting unit 120 composed of the reader, the marker detecting unit 120 composed of the reader reads the identifier transmitted by the RF tag. Then, the identifier read by the marker detection unit 120 including the reader is transferred to the position calculation unit 102 of the control device 100. The communication method between the reader and the RF tag is a radio wave method or an electromagnetic induction method.

The control device 100 records the captured image acquired by the image acquisition process in the storage unit 110. At this time, the control device 100 records the latest temporarily stored identifier in the storage unit 110 in association with the captured image. Therefore, from the time when a certain RF tag passes through the reader and the identifier of the RF tag is temporarily stored in the control device 100 until the next RF tag passes through the reader, the identifier of the previous RF tag Is associated with the captured image and recorded in the storage unit 110.

As described above, the imaging position of the belt 29 can be specified from the identifier recorded in the storage unit 110.

Next, a deterioration diagnosis method of the belt conveyor device using the belt deterioration diagnosis device 10 of the present invention will be described with reference to FIGS. 5A to 5C. 5A shows the initial state of belt deterioration, FIG. 5B shows the intermediate state of belt deterioration, and FIG. 5C shows the late state of belt deterioration.

5A to 5C show a case where it is determined that the surface of the belt 29 is scratched and the scratches become large and deterioration is progressing.

The captured image captured by the image pickup device 30 is given to the control device 100. The belt surface state detection unit 104 of the control device 100 recognizes the captured image.

As shown in FIG. 5A, the belt surface state detecting unit 104 determines by image recognition that small scratches a and b are generated on the surface of the belt 29. Then, it is also determined that a slight vertical crack c is also generated from the scratches a and b.

As shown in FIG. 5A, when the control device 100 determines that a scratch has occurred, the control device 100 stores the captured image in the storage unit 110 in association with the position of the belt 29 by the position calculation unit 102 and the time information at which the image was captured. Let me.

Subsequently, the operation of the belt conveyor 20 is continued. Then, the captured image captured by the image pickup device 30 is given to the control device 100. The belt surface state detection unit 104 of the control device 100 recognizes the captured image. When the operation is repeated several times, a photographed image as shown in FIG. 5B can be obtained from the surface of the belt 29.

The belt deterioration determination unit 105 reads out the front and back captured images in time series from the captured images captured by the belt 29 at the same position from the belt surface image information storage unit 110b, and determines the change in the captured image at the same position. And determine if the deterioration is progressing.

As shown in FIG. 5B, small scratches a and b are generated on the surface of the belt 29. Then, vertical cracks c extend from the scratches a and b.

The belt deterioration determination unit 105 compares the captured image of FIG. 5A with the captured image of FIG. 5B, and determines the degree of deterioration. In this example, it can be seen that the vertical crack C is extended. The belt deterioration determination unit 105 can determine that the deterioration is progressing.

Further, as the operation of the belt conveyor 20 is continued, a photographed image as shown in FIG. 5C can be obtained from the surface of the belt 29.

As shown in FIG. 5C, the scratches a and b on the surface of the belt 29 are large. Then, the vertical crack c also extends so as to be continuous with the scratches a and b.

The belt deterioration determination unit 105 compares the captured image of FIG. 5B with the captured image of FIG. 5C, and determines the degree of deterioration. In this example, it can be seen that the vertical crack C is further extended. The belt deterioration determination unit 105 can determine that the deterioration has progressed further and the time to replace the belt 29 is approaching.

FIGS. 5A to 5C diagnose deterioration based on scratches, but in the present invention, the shape and area of not only scratches but also places where colors, patterns, colors or patterns are changed are old in chronological order. It may be configured to compare an image with a new image to determine deterioration.

Further, in this embodiment, in order to reduce the amount of image pickup data stored in the storage unit 110, the image after the surface state in which deterioration progresses is detected by the belt surface state detection unit 104 is specified and stored. However, it may be configured so that all the captured images are stored and the old image and the new image are compared in chronological order to judge the deterioration without using the belt surface state detecting unit 104. ..

Although the embodiment for carrying out the present invention has been described above, the above-described embodiment is for facilitating the understanding of the present invention, and is not for limiting the interpretation of the present invention. The present invention can be modified and improved without departing from the spirit thereof, and the present invention also includes an equivalent thereof.

In the above embodiment, the object to be conveyed by the belt 29 is a slip, but the transfer is not limited to the slip. That is, the use of the belt conveyor 20 is not limited to soil removal.

5: Slip 10: Belt deterioration diagnosis device 20: Belt conveyor 29: Belt 29a: Slip mounting surface 30: Image pickup device 30a: Camera 30b: Lighting device 110 Storage unit 102 Position calculation unit 104 Belt surface condition detection unit 105 Belt deterioration determination unit

Claims (3)

It is a belt deterioration diagnosis device that diagnoses the deterioration of the belt of the belt conveyor.
An image pickup device that is arranged to face the slip mounting surface of the belt and images a predetermined position of the belt.
A storage unit that stores the image of the belt imaged by the image pickup device in association with the position information of the imaged belt and the time information of the image.
A belt deterioration determination unit that reads out the images before and after the image of the belt at the same position from the storage unit in chronological order, determines the image at the same position of the belt, and determines whether or not the deterioration has progressed. And, with
A belt deterioration diagnostic device that determines the deterioration state of the belt. A marker is provided on the belt, and a position calculation unit for specifying the position of the belt imaged by the image pickup apparatus based on the marker provided on the belt is provided. The belt deterioration diagnosis device according to claim 1, wherein the image pickup data captured by the device is associated and stored in the storage unit, and the image pickup data at the same position is read out in time series from the storage unit. The belt deterioration diagnosis according to claim 1 or 2, wherein the belt deterioration determination unit compares the images of the front and back of the belt at the same position read from the storage unit in time series, and determines the progress of deterioration of the belt. Device.

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