JP6206318B2 - Conveyor transported object monitoring method and monitoring apparatus - Google Patents

Description

  The present invention relates to a conveyor transported object monitoring method and a monitoring apparatus when shearing scraps and the like are transported by an apron type conveyor.

  In the thick plate shearing line, shearing waste is transported by an apron type conveyor, and the state of transport is visually monitored by an operator using a monitoring television camera (ITV).

  However, when the operational load other than the operator's conveyor monitoring is high, it takes a long time to detect the clogging due to a delay in finding abnormal conditions such as clogging of shearing debris. For this reason, it is desired to automatically monitor the state of conveyance of the sheared waste that is the conveyor conveyed product.

  Various techniques are known as techniques for automatically monitoring abnormalities of conveyed items on a conveyor. For example, Patent Documents 1 and 2 disclose techniques for detecting a staying state when transporting garbage. Patent Document 3 discloses a technique for irradiating an object conveyed by a conveyor with light rays from above, monitoring the object with a television camera, analyzing the obtained image, and detecting the height of the conveyed object. ing.

JP-A-9-175629 JP-A-9-185710 JP-A-5-306909

  However, the techniques disclosed in Patent Documents 1 and 2 can be applied when carrying a certain amount of garbage on a conveyor, but when carrying shear scrap on an apron type conveyor. However, it is difficult to apply the feature quantity necessary for determining shearing waste, and it is difficult to apply. In other words, when shear scrap is carried on an apron type conveyor, the shear scrap is sparsely present on the conveyor with a part of the transport surface of the conveyor being exposed. It is difficult to grasp the characteristics of the shearing scrap with respect to the mold conveyor. Similarly, in the technique of Patent Document 3, it is difficult to detect shearing waste on the apron type conveyor.

  The present invention has been made in view of such circumstances, and even when a conveyor having an uneven shape is used to transport a transported object that is partially exposed, the conveyor surface is It is an object of the present invention to provide a conveyor transported object monitoring method and a monitoring device capable of detecting a transported object.

  Apron type conveyors used for conveying shearing debris in thick plate shearing lines are not simple planes, but are connected to each other by links so that they have irregularities. In this case, when the irradiated portion is imaged by irradiating slit light as a light source, the slit light changes not by a single straight line but by a combination of a curved line and a straight line. Further, since the shearing debris has various thicknesses, lengths, and shapes, and there is no bulk that can hide the conveyor surface, only a part of the shearing debris can be detected with spot light. Thus, since the shape of the conveyor is uneven and changes in a complicated manner, in the image processing as in the prior art, a part of the conveyor conveyance surface is exposed like shearing waste conveyed on the conveyor. It is difficult to detect the state of sparsely conveyed objects, and it is difficult to detect abnormalities such as clogging.

  Therefore, as a result of repeated studies by the present inventor, a TV camera is used to shoot an area including a portion where the slit light hits the conveyor transport surface while irradiating the conveyor transport surface with slit light in the absence of a transported object. , Convey it as a basic pattern after image processing, and compare the actual pattern obtained by photographing and image processing in the same way while conveying the conveyed object with the basic pattern, thereby conveying a conveyor like shearing waste The present invention has been completed by finding that it is possible to detect even a conveyed product in a state where a part of the conveying surface is exposed.

That is, the present invention provides the following (1) to ( 12 ).

(1) Conveyor transported object monitoring method for monitoring a transported object transported on a conveyor having an uneven shape with the transport surface of the conveyor partially exposed,
While irradiating the conveying surface of the conveyor with slit light in the absence of a conveyed product, a plane area including a portion where the slit light hits on the conveying surface of the conveyor is photographed with a television camera, image processed, and a basic pattern A process of obtaining
Shooting the plane area including the portion where the slit light hits the transport surface of the conveyor with a TV camera while irradiating the transport surface of the conveyor with the slit light when transporting the transported object by the conveyor, A process of image processing to obtain a real pattern;
By comparing the actual pattern and the basic pattern to obtain a plurality of difference images, possess and detecting the conveyed object from these difference images,
The conveyor is configured by connecting a plurality of conveyor pieces with links, and the slit light has a width such that the range in the length direction can irradiate the length of the conveyor piece at a time. The TV camera is irradiated obliquely so that the range of the direction is a range that can irradiate the range where the conveyed object is substantially placed in the conveyor at one time, and the TV camera has the same shooting range as the slit light irradiation range. It is installed so that it may become the range stored on a screen, The conveyor conveyed product monitoring method characterized by the above-mentioned .

( 2 ) The basic pattern is obtained by photographing one round of the conveyor with the television camera, arranging the obtained n2 images in order, and extracting n1 images of any one of the conveyor pieces from these images. A set of n1 images corresponding to the number of pieces is acquired, images having the same characteristics are determined for each of the n1 images of each set, and the image of one unit of the conveyor piece thus determined is determined. Obtained as a set,
A set of difference images obtained by comparing the actual pattern with the basic pattern, obtaining a basic pattern having the highest image matching rate, taking a difference between each image of the actual pattern and each image of the basic pattern The method for monitoring a conveyor conveyed product according to ( 1 ), wherein a time-series change of the difference image is obtained from the detected image to detect the conveyed product.

(3) conveyor according to when the same portion of the transported material in the difference image is reflected more than a predetermined time, in (2) determining that clogging of abnormal is conveyed in the conveyance object occurs Conveyance monitoring method.

( 4 ) The conveyor transported object monitoring method according to ( 2 ), wherein the transported object transport amount per time is calculated by obtaining an area of the transported object from the detected image of the transported object and integrating the area.

( 5 ) When the transport amount of the transported object is detected at two locations on the upstream side and the downstream side of the conveyor, and the transport amount on the downstream side is smaller than the upstream side, there is an abnormality in the transported object between them. It is determined that clogging of the conveyed product is, The conveyor conveyed product monitoring method according to ( 4 ), characterized in that:

( 6 ) The conveyor conveyed object monitoring method according to any one of (1) to ( 5 ), further comprising a step of issuing an alarm when an abnormality occurs in the conveyed object.

(7) A conveyor transported object monitoring device that monitors a transported object that is transported in a state where the transport surface of the conveyor is partially exposed on a conveyor having an uneven shape,
A light source that irradiates slit light on the conveyor surface of the conveyor;
A television camera that captures a plane area including a portion on which the slit light hits on the conveying surface of the conveyor;
An image processing unit for processing an image captured by the television camera;
While irradiating the conveyor surface of the conveyor with slit light from the light source in the absence of an object to be conveyed, the area including the portion where the slit light hits the conveyor surface of the conveyor is photographed with a TV camera, and image processing is performed. The obtained basic pattern is memorized, and when the conveyed object is conveyed by the conveyor, the slit light hits the conveying surface of the conveyor while irradiating the conveying surface of the conveyor with the slit light. A control unit that captures a plane area including the image by a television camera, compares a real pattern obtained by image processing with the basic pattern, obtains a plurality of difference images, and detects a conveyed object from the difference images; And
The conveyor is configured by connecting a plurality of conveyor pieces by links, and the light source is configured such that the slit light has a range in the length direction that can irradiate the length of the conveyor piece at a time. And the range in the width direction is set to be irradiated obliquely so that the range in which the conveyed product is placed in the conveyor can be irradiated at once, and the TV camera A conveyor transported object monitoring device, characterized in that the range is installed so that the slit light irradiation range can be accommodated on one screen .

( 8 ) The basic pattern is obtained by photographing one round of the conveyor with the television camera, arranging the obtained n2 images in order, and extracting n1 images of an arbitrary conveyor piece from these images, A set of n1 images corresponding to the number of pieces is acquired, images having the same characteristics are determined for each of the n1 images of each set, and the image of one unit of the conveyor piece thus determined is determined. Obtained as a set,
The control unit compares the actual pattern with the basic pattern to obtain a basic pattern having the highest image matching rate, and obtains a difference between each image of the actual pattern and each image of the basic pattern. The conveyor conveyed product monitoring apparatus according to ( 7 ), wherein a time-series change of the differential image is obtained from the set of the differential images, and the conveyed product is detected.

( 9 ) The control unit determines that the clogging of the transported object, which is an abnormality of the transported object, has occurred when the same portion of the transported object appears in the difference image for a predetermined time or longer ( 8) ) Conveyor transported object monitoring device.

(10) wherein, the conveyor according to (8) calculating the conveyance amount of the conveyance of per time by measuring the area of the transfer material from the detected image of the conveyed object, integrating it Conveyance monitoring device.

( 11 ) The light source and the TV camera are installed at two locations on the upstream side and the downstream side of the conveyor, and the control unit detects the transport amount of the transported material at these two locations and When the transport amount on the downstream side becomes small, it is determined that the transported object is clogged, which is an abnormality of the transported material, and the transported object monitoring device according to ( 10 ).

( 12 ) The conveyor conveyed product according to any one of ( 7 ) to ( 11 ), further comprising an alarm device that issues an alarm when the controller determines that an abnormality has occurred in the conveyed item. Monitoring device.

  According to the present invention, while irradiating the conveyor transport surface with slit light in the absence of a transported object, the area including the portion of the conveyor transport surface where the slit light strikes is photographed with a television camera, and image processing is performed. Since the difference image between the actual pattern obtained by photographing and image processing and the basic pattern is taken in the same way when the transported object is transported, it is stored as a pattern. Even if the object is sparsely present with a part of the surface exposed, the presence or absence can be automatically detected. By automatically detecting the conveyed product on the conveyor in this way, it is possible to quickly find an abnormal state such as clogging of the conveyed product, and to take measures for eliminating the abnormal state in a short time.

It is a schematic block diagram which shows the conveyor conveyed product monitoring apparatus which concerns on one Embodiment of this invention. It is a side view which shows the conveyor by which the conveyor conveyed product monitoring apparatus which concerns on one Embodiment of this invention is used. It is a figure for demonstrating the process image obtained by an image processing apparatus. It is a figure for demonstrating the flow at the time of obtaining a basic pattern. It is a figure for demonstrating the specific example of the image process in determining a basic pattern. It is a figure for demonstrating the other specific example of the image process in determining a basic pattern. It is a figure for demonstrating the flow at the time of detecting a shearing waste from a real pattern and a basic pattern. It is a figure for demonstrating the determination example of the presence or absence of shearing waste.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a schematic configuration diagram illustrating a conveyor conveyed product monitoring apparatus according to an embodiment of the present invention, and FIG. 2 is a side view illustrating a conveyor in which the conveyor conveyed object monitoring apparatus according to an embodiment of the present invention is used.

  The conveyor conveyed object monitoring apparatus 1 monitors the state of shearing waste (conveyed object) 11 conveyed by an apron type conveyor 10 in a thick plate shear line, and includes a slit laser oscillator (slit light source) 2 and a television. It has a camera 3, an image processing device (image processing unit) 4, a control unit 5, and an alarm device 6.

  As shown in FIG. 2, the apron type conveyor (hereinafter, also simply referred to as a conveyor) 10 is configured by connecting a plurality of conveyor pieces 10a by links 10b with a conveyor piece (apron) 10a as a unit. Is convex.

  The slit laser oscillator 2 irradiates the conveying surface of the conveyor 10 with laser slit light (hereinafter simply referred to as slit light). The slit laser oscillator 2 is a range in which the length of the conveyor piece 10a that is one unit of the apron type conveyor (one apron unit) can be irradiated at a time in the range of the conveyor conveyance direction in the slit light emitted from the slit laser oscillator 2 And the position and angle are adjusted so that the range of the conveyor width direction in the slit light to irradiate becomes the range which can irradiate the range in which the shear scrap 11 is substantially mounted among the conveyors 10 at once. In this case, typically, as shown in the figure, the slit light is obliquely applied to the transport surface of the conveyor 10. At this time, the length of the irradiation range in the flow direction may be longer than the length of the conveyor piece 10a.

  The TV camera 3 captures an area including a portion where the slit light strikes on the transport surface of the apron type conveyor 10, and can use an ITV installed in a line. However, not only ITV but other television cameras may be installed. The television camera 3 is installed with its position and angle adjusted so that the photographing range is a range in which the slit light irradiation range can be accommodated on one screen.

  The image processing device 4 performs image processing on an image picked up by the television camera 3 and obtains a processed image of a portion irradiated with laser slit light.

  A processed image obtained by the image processing apparatus 4 is shown in FIG. In the area where the slit light A from the slit laser oscillator 2 is irradiated on the apron type conveyor 10, the photographing range A including the slit light A is photographed by the television camera 3 and processed by the image processing device 4 to become an image A. . Similarly, in the region irradiated with the slit light B, the photographing range B is photographed and processed by the image processing device 4 to become an image B.

  The control unit 5 obtains the state of the sheared waste 11 that is the conveyed product from the processed image processed by the image processing apparatus 4 and determines whether or not an abnormality such as clogging has occurred from the state.

  The alarm device 6 is for issuing an alarm based on a command from the control unit 5 when the control unit 5 determines that an abnormality such as clogging has occurred in the state of the shearing scrap 11.

  Next, the processing operation of the conveyor conveyed product monitoring apparatus 1 configured as described above will be described.

  As described above, since the shape of the apron type conveyor 10 is uneven and changes in a complicated manner, when detecting the state of the shearing scrap 11 sparsely present with a part of the conveyor conveying surface exposed, As described above, it is difficult to accurately determine whether the image is captured by the TV camera, whether it is a conveyor or shearing waste.

  Therefore, in the present embodiment, a portion in which the slit light strikes the conveyance surface of the conveyor 10 while irradiating the laser slit light from the slit laser oscillator 2 to the conveyance surface of the apron type conveyor 10 in a state where there is no shearing waste is included. The area is imaged by the television camera 3, image-processed by the image processing device 4, stored as a basic pattern in the control unit 5, and similarly obtained when imaged and image-processed when the shearing waste 11 is conveyed. Compare the actual pattern with the basic pattern.

  Flow A in obtaining the basic pattern is performed as shown in FIG. First, one round of the conveyor 10 is photographed by the television camera 3 with no shearing waste on the conveyor 10, and n2 images obtained are arranged in order. Next, the operation of extracting the image n1 of an arbitrary apron (conveyor piece 10a) from the n2 images of one round of the conveyor and the operation of moving to the top of the image of the next apron are repeated by the number of aprons.

here,
a: Number of apron units (conveyor piece 10a) constituting the conveyor e: Length of apron 1 unit (m)
v: Conveyor transport speed (m / s)
N: Given the camera frame rate (f / s),
The number of images n2 for one turn of the conveyor and the number of images n1 for one unit of the apron are expressed by equations (1) and (2), respectively.
n2 = (a × e / v) × N (1)
n1 = (e / v) × N (2)
That is, a sets of n1 images corresponding to one unit of an apron are obtained.

  Since the image for one revolution of the conveyor is a unit of apron, the same order of the images in the a1 n1 images are compared, and the same features are extracted from the shape of the high-brightness part that is exposed to the slit light. The basic pattern for one unit of apron is determined.

  Specifically, as shown in FIG. 5, a corrected image is created by performing processes such as translation, unnecessary portion removal, and rotation on the first original image of each group, and the same features 1 The sheet image is determined. This operation is repeated up to the n1st image, and a basic pattern for one unit of apron is determined.

  However, the timing of each image at the time of shooting with the TV camera is not synchronized with the conveyor conveyance speed, so strictly speaking, the number of images in one apron unit is the same for each set. There is no guarantee. Even in this case, the basic pattern can be determined by extracting images having the same characteristics by comparing each set of images one by one by the method shown in FIG.

  Specifically, the first image of the second set is first compared with the first and second images of the first set, and is applied to the closest image number. Here, the first sheet is assumed. Next, the second image of the second set is compared with the second and third images of the first set, and is applied to the closer image. Here, the third sheet is assumed. Such an operation is performed up to the n1st sheet. In this example, the second set of the second set is a missing number, but since there are a set of images, if a is sufficiently large, the effect of the missing number is eliminated if the whole is overlapped.

  In the third and subsequent sets, image comparison is performed in the same manner and image numbers are assigned. In this way, a basic pattern for one unit of apron can be determined.

  In this example, the frame rate of the TV camera is sufficiently large with respect to the conveyor conveyance speed, so the change for each image is small, and images with the same characteristics are extracted without synchronizing with the conveyor, and the basic pattern is extracted. Can be determined.

  In any of the above examples, in creating a basic pattern, it is effective to irradiate slit light once in a range of one apron in order to collect one set of repeated images of one apron.

  A flow B in detecting shearing waste from the actual pattern and the basic pattern obtained by photographing and image processing in the same manner while the shearing waste 11 is being conveyed will be described with reference to FIG.

  First, the captured image is compared with the basic pattern obtained by the flow A, and the basic pattern having the highest image matching rate is obtained. Next, the difference between the captured image and the basic pattern is taken. This operation is repeated from the first sheet (image number 1). Thereby, a set of difference images is obtained, a time-series change of the difference images is obtained from the set of difference images, and shearing waste is detected.

  At this time, when the presence / absence of shearing waste as a conveyed product is determined from the difference image obtained by the flow B, the determination is performed based on a predetermined determination condition.

  For example, as in case 1 of FIG. 8, the portion detected as the difference image is continuously detected as the first image, the second image, the third image, and so on, and appears to have moved in one direction. When the change in the size of the portion is not so large, it is determined as shearing waste.

  On the other hand, as in the case 2 of FIG. 8, the portion detected as the difference image is detected only on a small number of screens (in the example of the figure, only one screen of the second difference image), or the case 3 If there is a portion detected as a difference image that should not be in the range where the slit light does not hit, it is not determined as shearing waste.

  However, the above example is merely an example, and the threshold value of the determination condition at this time needs to be adjusted depending on the configuration of the equipment, the operation condition, and the like. In addition, a determination method other than the above example may be used.

  Unlike the case 1 above, the portion detected as the difference image does not move in a certain direction, but if the portion detected as the difference image is reflected in the certain portion for a predetermined time or more, it is determined as clogging of shearing dust. can do. If the alarm device 6 issues an alarm when it is determined in this way, it is possible to find clogging of shearing waste without depending on the operator.

  On the contrary, when the detection continues for a long time in a range where there is no shearing dust as in the case 3, there may be cases of dust, dirt, and the like. Therefore, when it is determined in this way, a warning for cleaning can be obtained by issuing an alarm.

  In addition, by using the conveyor conveyed product monitoring apparatus according to the present embodiment, it is possible to detect the amount of sheared scrap conveyed. That is, in a state in which shearing waste is detected, the area of shearing waste is obtained from the image and integrated, whereby the amount of shearing waste transported per hour can be calculated. By installing the conveyor conveyance monitoring device of the present embodiment at two locations on the upstream side and downstream side of the conveyor, and detecting the amount of sheared debris transported as described above, the upstream side and the downstream side are detected. When the conveyance amount on the side decreases, it can be determined that the shearing clogged between these two conveyor conveyance object monitoring devices.

  As described above, according to the present embodiment, an area including a portion where the slit light hits the conveyor transport surface is photographed with the TV camera while irradiating the conveyor transport surface with slit light in the absence of a transported object. Since the image processing and storing as a basic pattern, and taking the sheared waste that is the conveyed product, taking a difference image between the actual pattern and the basic pattern obtained by imaging and image processing in the same manner, It is possible to automatically detect the presence or absence of shearing sparsely present in a state in which a part of the conveying surface of the conveyor is exposed on the apron type conveyor having an uneven shape. Thus, by automatically detecting the shearing scraps on the conveyor, it is possible to quickly find an abnormal state such as clogging of the shearing scraps, and to perform a solution for the abnormal state in a short time.

  In addition, this invention is not limited to the said embodiment, A various deformation | transformation is possible. For example, in the above-described embodiment, the apron type conveyor is used as the conveyor. However, the present invention is not limited to this, and another conveyor in which a plurality of conveyor pieces are connected can be used. Moreover, it should just be a thing with an uneven | corrugated surface, not only what connected the some conveyor piece. Furthermore, it is not limited to the case where sheared waste is used as the conveyed product, and other conveyed items may be used as long as they are conveyed so that the uneven surface of the conveyor is exposed. Furthermore, the image processing of the basic pattern and the actual pattern is not limited to the above embodiment, and various methods can be employed.

1 Conveyor transported object monitoring device 2 Laser oscillator (slit light source)
3 TV camera 4 Image processing device (image processing unit)
5 Control unit 6 Alarm device 10 Apron type conveyor (conveyor)
10a Conveyor piece 10b Link 11 Shear waste (conveyed material)

Claims (12)

On a conveyor having an uneven shape, a conveyor transported object monitoring method for monitoring a transported object transported in a state where the transport surface of the conveyor is partially exposed,
While irradiating the conveying surface of the conveyor with slit light in the absence of a conveyed product, a plane area including a portion where the slit light hits on the conveying surface of the conveyor is photographed with a television camera, image processed, and a basic pattern A process of obtaining
Shooting the plane area including the portion where the slit light hits the transport surface of the conveyor with a TV camera while irradiating the transport surface of the conveyor with the slit light when transporting the transported object by the conveyor, A process of image processing to obtain a real pattern;
By comparing the actual pattern and the basic pattern to obtain a plurality of difference images, possess and detecting the conveyed object from these difference images,
The conveyor is configured by connecting a plurality of conveyor pieces with links, and the slit light has a width such that the range in the length direction can irradiate the length of the conveyor piece at a time. The TV camera is irradiated obliquely so that the range of the direction is a range that can irradiate the range where the conveyed object is substantially placed in the conveyor at one time, and the TV camera has the same shooting range as the slit light irradiation range. It is installed so that it may become the range stored on a screen, The conveyor conveyed product monitoring method characterized by the above-mentioned . In the basic pattern, one round of the conveyor is photographed by the television camera, and the obtained n2 images are arranged in order, and n1 images for any of the conveyor pieces are extracted from these images, and the number of conveyor pieces A set of n1 images per minute, images having the same characteristics are determined for each of the n1 images of each set, and obtained as a set of images for one unit of the conveyor piece thus determined. And
A set of difference images obtained by comparing the actual pattern with the basic pattern, obtaining a basic pattern having the highest image matching rate, taking a difference between each image of the actual pattern and each image of the basic pattern 2. A conveyor conveyed object monitoring method according to claim 1 , wherein a time-series change of the difference image is obtained from the detected image and the conveyed object is detected. The conveyor conveyed object monitoring according to claim 2 , wherein when the same portion of the conveyed object is reflected in the difference image for a predetermined time or more, it is determined that the conveyed object is jammed. Method. 3. The method of monitoring a conveyed product according to claim 2 , wherein an area of the conveyed product is obtained from a detected image of the conveyed product, and the conveyance amount per hour is calculated by integrating the area. When the transport amount of the transported object is detected at two places on the upstream side and the downstream side of the conveyor, and the transport amount on the downstream side is smaller than the upstream side, the transport is abnormal between these It is determined that clogging of an object has occurred, and the conveyor conveyed object monitoring method according to claim 4 . The method for monitoring a conveyor conveyed product according to any one of claims 1 to 5 , further comprising a step of issuing an alarm when an abnormality occurs in the conveyed product. On a conveyor having a concavo-convex shape, a conveyor transported object monitoring device that monitors a transported object transported in a state where the transport surface of the conveyor is partially exposed,
A light source that irradiates slit light on the conveyor surface of the conveyor;
A television camera that captures a plane area including a portion on which the slit light hits on the conveying surface of the conveyor;
An image processing unit for processing an image captured by the television camera;
While irradiating the conveyor surface of the conveyor with slit light from the light source in the absence of an object to be conveyed, the area including the portion where the slit light hits the conveyor surface of the conveyor is photographed with a TV camera, and image processing is performed. The obtained basic pattern is memorized, and when the conveyed object is conveyed by the conveyor, the slit light hits the conveying surface of the conveyor while irradiating the conveying surface of the conveyor with the slit light. A control unit that captures a plane area including the image by a television camera, compares a real pattern obtained by image processing with the basic pattern, obtains a plurality of difference images, and detects a conveyed object from the difference images; And
The conveyor is configured by connecting a plurality of conveyor pieces by links, and the light source is configured such that the slit light has a range in the length direction that can irradiate the length of the conveyor piece at a time. And the range in the width direction is set to be irradiated obliquely so that the range in which the conveyed product is placed in the conveyor can be irradiated at once, and the TV camera A conveyor transported object monitoring device, characterized in that the range is installed so that the slit light irradiation range can be accommodated on one screen . In the basic pattern, one round of the conveyor is photographed by the television camera, and the obtained n2 images are arranged in order, and from the images, n1 images of an arbitrary conveyor piece are extracted, and the number of conveyor pieces A set of n1 images per minute, images having the same characteristics are determined for each of the n1 images of each set, and obtained as a set of images for one unit of the conveyor piece thus determined. And
The control unit compares the actual pattern with the basic pattern to obtain a basic pattern having the highest image matching rate, and obtains a difference between each image of the actual pattern and each image of the basic pattern. The conveyor conveyance monitoring apparatus according to claim 7 , wherein a time-series change of the difference image is obtained from the set of difference images to detect a conveyance object. Wherein the control unit according to claim 8 in which the same portion of the transported material on the differential image when is reflected more than a predetermined time, clogging of abnormal is conveyed in the conveying object is and judging to have occurred Conveyor conveyor monitoring device. The said control part calculates | requires the conveyance amount of the conveyed product per time by calculating | requiring the area of a conveyed product from the detection image of a conveyed product, and integrating it, The conveyor conveyed product monitoring of Claim 8 characterized by the above-mentioned. apparatus. The light source and the TV camera are installed at two locations on the upstream side and the downstream side of the conveyor, and the control unit detects the transport amount of the transported material at these two locations, and the downstream side with respect to the upstream side. The conveyor transported object monitoring apparatus according to claim 10 , wherein when the transport amount of the transported material decreases, it is determined that the transported object is clogged, which is an abnormality of the transported material between them. The conveyor transported object monitoring according to any one of claims 7 to 11 , further comprising an alarm device that issues an alarm when the controller determines that an abnormality has occurred in the transported object. apparatus.

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