KR102186884B1 - Abrasion inspection device for conveyor belt and safety management system using thereof - Google Patents

Abstract

Provided is an apparatus for identifying abrasion of a conveyor belt. In one embodiment, the apparatus for identifying abrasion of a conveyor belt includes: a light emitting part emitting line laser beams to the conveyor belt; a light receiving part receiving light reflected by the conveyor belt; and a control part extracting a plurality of pixel values received in the light receiving part to measure a height of a surface of the conveyor belt, wherein the laser beams can be emitted to the surface of the conveyor belt in contact with a tail pulley part. Therefore, the apparatus for identifying abrasion of a conveyor belt can minimize a measurement error of abrasion identification caused by dust and foreign substances.

Description

Conveyor belt wear check device and conveyor belt safety management system using the device {ABRASION INSPECTION DEVICE FOR CONVEYOR BELT AND SAFETY MANAGEMENT SYSTEM USING THEREOF}

The present invention relates to an apparatus for checking wear of a conveyor belt and a safety management system for a conveyor belt using the same.

The conveyor belt is driven using a motor and a reducer, and transports the conveyed material while rotating by inserting a belt between the drive pulley and the tail pulley.

Industrial conveyor belts used in steel mills and mines are for transporting iron ore, coke, coal, and cymet, and they transport a considerable amount of transport over long distances. Is reduced.

In the conveyor belt, not only the natural thickness of the belt decreases due to such physical friction, but also scratches or grooves may occur due to the conveyed material input from the raw material input unit to the conveyor belt.

If the conveyor belt is worn and the thickness becomes thinner, or the belt is damaged due to deep scratches or grooves, serious mechanical damage to the conveyor belt system occurs, damage to the conveyed material, and contamination of the surrounding environment due to the falling of the conveyed material. In addition, it can cause personal injury to workers working nearby.

However, in the conventional method of checking the wear of a conveyor belt, it was extremely difficult to accurately measure the thickness of the conveyor belt due to the occurrence of noise due to ambient light, dust and foreign substances, even when using a device that required too much cost or using light. .

The present invention minimizes the measurement error of the wear check caused by dust and foreign substances, and improves the accuracy of the wear level measurement of the conveyor belt, thereby preventing the occurrence of personal injury, and the conveyor belt using the same. We intend to provide a safety management system.

In order to solve the above problems, the present invention includes a light emitting unit that emits a line laser to a conveyor belt; A light receiving unit for receiving the light reflected by the conveyor belt; And a control unit that extracts a plurality of pixel values received from the light receiving unit and measures the height of the surface of the conveyor belt, wherein the laser is emitted to a surface of the conveyor belt in contact with the tail pulley unit. Provide a verification device.

According to an embodiment of the present invention, it is possible to minimize a measurement error of checking wear due to dust and foreign matter.

In addition, according to an embodiment of the present invention, it is possible to prevent the occurrence of personal accidents by preventing the cutting of the conveyor belt.

1 shows a safety management system for a conveyor belt according to an embodiment of the present invention.
FIG. 2(a) is a view showing a wear check device of a conveyor belt and a tail pulley of a conveyor belt according to an embodiment of the present invention, and FIG. 2(b) is cut along A-A' in FIG. 2(a). It shows a cross section.
3 to 6 show a wear check device of the conveyor belt according to each embodiment of the present invention.
7 and 8 show a wear check device and a light shielding part of the conveyor belt according to each embodiment of the present invention.
9 illustrates a pixel in which an image is formed in a light receiving unit according to an embodiment of the present invention.
10 to 13 illustrate measuring the height of a surface of a conveyor belt from a pixel on which an image is formed in a light receiving unit according to an embodiment of the present invention.
14 is a schematic diagram showing a safety management system for a conveyor belt according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only this embodiment makes the disclosure of the present invention complete, and the contents of the present invention are provided to those of ordinary skill in the art. It is provided to inform you more completely.

In this specification, when an element is referred to as being positioned'above' or'below' another element, it means that the element is positioned directly above or'below' another element, or an additional element is placed between those elements. It includes all meanings that can be intervened. In this specification, the term'upper' or'lower' is a relative concept set at the observer's point of view, and if the observer's point of view is different,'upper' may mean'lower', and'lower' means'upper'. It could mean.

The same reference numerals in the plurality of drawings refer to substantially the same elements. In addition, terms such as'include' or'have' are intended to designate the existence of a feature, number, step, action, component, part, or combination thereof to be described, and one or more other features, numbers, or steps. It is to be understood that it does not preclude the possibility of addition or presence of, operations, components, parts, or combinations thereof.

On the other hand, the conveyor belt referred to below has both the meaning of a conveyor system (or device) and a conveyor belt, and refers to a conveyor belt with respect to wear.

An embodiment of the present invention, a light emitting unit for emitting a line (line) laser to the conveyor belt; A light receiving unit for receiving the light reflected by the conveyor belt; And a control unit that extracts a plurality of pixel values received from the light receiving unit and measures the height of the surface of the conveyor belt, wherein the laser is emitted to a surface of the conveyor belt in contact with the tail pulley unit. Provide a verification device.

At this time, it may further include an air injection unit for removing dust and foreign matter.

For example, it may include a first air injection unit disposed between the light emitting unit and the light receiving unit to inject air in the direction in which the laser moves.

Meanwhile, a second air injection unit may include a light transmitting window through which the emitted laser passes and a second air spraying unit for injecting air from an upper side toward a light receiving window through which the reflected light is transmitted.

In addition, a third air injection unit for injecting air toward the surface of the conveyor belt to which the laser is irradiated, the third air injection unit includes a position adjusting means capable of adjusting a length and a direction, and the It can remove dust and foreign substances from the laser surface.

For example, it may further include a light blocking portion that blocks the inflow of external light to the surface to which the laser is irradiated.

In this case, the light shielding part may include a light shielding film made of a soft material and a light shielding part support for adjusting a light shielding area by adjusting a length.

For example, it may further include a dust suction device for discharging dust and foreign substances in the light shielding part to the outside.

Meanwhile, the control unit may detect information on the remaining thickness of the conveyor belt from height information on the surface of the conveyor belt.

For example, the control unit may generate a notification when a surface having a thickness thinner than a preset residual thickness is detected by the conveyor belt.

In this case, the notification may include stopping the driving of the conveyor belt.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

1 shows a safety management system for a conveyor belt according to an embodiment of the present invention.

Referring to FIG. 1, the safety management system of a conveyor belt includes a conveyor belt 1, a raw material input unit 2 for inputting raw materials onto the conveyor belt, a carrier roller 3 supporting the conveyor belt, and a carrier roller 3 ) Supporting the carrier roller, and a tail pulley part 5 disposed at the end of the conveyor belt 1 to change the direction of the conveyor belt 1.

FIG. 2(a) is a view showing a wear check device of a conveyor belt and a tail pulley of a conveyor belt according to an embodiment of the present invention, and FIG. 2(b) is cut along A-A' in FIG. 2(a). It shows a cross section.

Referring to Fig. 2(a), the safety management system of the conveyor belt is a carrier that supports the conveyor belt 1 so that the long side is approximately in a rhombus shape with an empty long side in order to prevent the raw material from being separated from the conveyor belt 1 during transport. It includes a roller (3).

Accordingly, as shown in Fig. 2(b), a portion of the conveyor belt 1 supported by the carrier roller 3 becomes a rhombic shape with an approximately empty long side, and the conveyor belt 1 becomes a laser and a light receiving unit receiving the same. ) In the case of a method of measuring the height of the surface, it is very difficult to accurately detect the thickness of the conveyor belt 1.

Accordingly, the safety management system of the conveyor belt emits a laser to the surface where the conveyor belt 1 and the tail pulley part 5 contact, and can measure the height of the surface of the conveyor belt 1 in a flat state.

In addition, the safety management system of the conveyor belt, when the raw material on the conveyor belt 1 is transferred to the destination, and after passing through a return roller, comes into contact with the tail pulley 5 and ascends, the conveyor belt ( 1) You can measure the height of the surface.

Therefore, the safety management system of the conveyor belt allows the laser to be emitted in the same direction as the raw material movement, and measures the height of the surface of the conveyor belt 1 when dust and foreign substances are removed as much as possible. Can minimize the measurement error.

3 to 6 show a wear check device of the conveyor belt according to each embodiment of the present invention.

Referring to FIG. 3, the apparatus for checking wear of a conveyor belt includes a body part 110, a light emitting part 120, a light receiving part 130, and a controller (not shown).

The body part 110 defines an internal space in which the light emitting part 120 and the light receiving part 130 can be installed.

The body portion 110 includes a cap portion 111 having an inclination of an inverted triangle shape from top to bottom. Since the wear checking device of the conveyor belt is installed in an environment in which dust and various foreign substances can float, the cap 111 is provided to prevent laser emission and light reception from being disturbed by floating dust and foreign substances. In addition, when light other than the laser emitted from the light-emitting part 120 is recognized by the light-receiving part 130, noise may be generated, so that the cap part 111 is provided so that external light is received by the light-receiving part 130. Blocked by

The light emitting part 120 emits a line laser to the conveyor belt 1.

The light-emitting unit 120 includes a laser light source 121. The laser light source 121 may emit wavelengths of infrared, ultraviolet, and visible light, for example, may emit visible light, and, for example, a 655 nm red semiconductor laser may be used. For example, the laser light source 121 may include a point light source or a surface light source. For example, the laser light source 121 may include a DLP projector, a TFT projector, and an LCoS projector.

The light-emitting unit 120 may include a condensing lens 122. The condensing lens 122 converts a point-shaped laser beam or a plane-shaped laser beam emitted from the laser light source 121 into a line laser beam.

For example, the condensing lens 122 may include a cylindrical lens. The cylindrical lens is a lens formed with a curved surface on only one axis and a non-curved surface on the other axis, and when a point-shaped laser beam is incident on the cylindrical lens, the laser beam is focused on only one axis and has a long axis length on the one axis. Is converted to

For example, if the condensing lens 122 assumes that the beam output from the laser light source 121 includes AXB pixels composed of A rows and B columns, the line laser output through the condensing lens 122 is All or part of each row may be combined. For example, as 1 XB pixels are output, the brightness of each pixel becomes as bright as the summed pixels in the corresponding column B. Alternatively, the line laser output through the condensing lens 122 is outputted as A X 1 pixel, so that the brightness of each pixel becomes as bright as the summed pixels in the corresponding row A.

The light-emitting unit 120 may further include a transparent window 123. Since the apparatus for checking wear of the conveyor belt is installed in an environment in which dust and various foreign substances may float, it is necessary to protect the laser light source 121 and the condensing lens 122 from dust and foreign substances. Accordingly, the light emitting unit 120 may be configured to be blocked from the outside within the body unit 110 and to emit laser light through the transparent window 123.

The light-emitting unit 120 further includes an angle control unit (not shown) so that the line laser can be effectively attached to the surface of the conveyor belt 1. The angle control unit may be formed to be rotated about at least two axes in order to adjust an angle in two directions including a vertical direction or a horizontal direction.

The light receiving unit 130 receives light reflected by the conveyor belt 1.

The light-receiving unit 130 includes a light-receiving lens 132 for condensing the reflected light and a light-receiving sensor 131 for detecting the intensity of the reflected light. The light-receiving sensor 131 may include, for example, a charged coupled device (CCD) sensor, a complementary metal oxide semiconductor (CMOS) sensor, and the like, and may include a lens unit (not shown) for adjusting a focal length.

The light receiving unit 130 further includes an angle control unit (not shown) so that the line laser reflected from the surface of the conveyor belt 1 can be effectively detected. The angle control unit may be formed to be rotated about at least two axes in order to adjust an angle in two directions including a vertical direction or a horizontal direction.

The light receiving unit 130 may further include a light receiving window 133. Since the apparatus for checking wear of the conveyor belt is installed in an environment in which dust and various foreign substances can float, it is necessary to protect the light-receiving sensor 131 and the light-receiving lens 132 from dust and foreign substances. Accordingly, the light receiving unit 130 may be configured to be blocked from the outside within the body unit 110 and to emit laser light through the light receiving window 133.

The controller may extract a plurality of pixel values received from the light receiving unit 130 and measure the height of the surface of the conveyor belt 1.

As described above with reference to Figs. 2(a) and 2(b), in the safety management system of the conveyor belt 1, the conveyor belt 1 transfers raw materials in a rhombus shape with an approximately empty long side, so that the raw materials are loaded. The central part of the heaving wears out and the wear hardly proceeds at both ends.

Accordingly, the control unit compares the height of the surfaces of both ends of the conveyor belt 1 with the height of the central surface, and checks the degree of wear and damage of the central portion in real time, so that the conveyor belt 1 is broken as described later. The possibility of accidents such as such can be prevented in advance. Meanwhile, a detailed description of the control unit will be described later with reference to FIG. 9.

4 to 6, the apparatus for confirming wear of the conveyor belt further includes an air spray unit for removing dust and foreign matter. Although only one air injection part is shown in the drawing for explanation, it includes a structure in which two or more of the first to third air injection parts are installed together.

Referring to FIG. 4, the first air injection unit 141 is disposed between the light emitting unit 120 and the light receiving unit 130 to inject air in a direction in which the laser moves.

That is, the first air injection unit 141 removes the floating dust and foreign substances in the path where the line laser is emitted from the light emitting unit 120 and is reflected from the surface of the conveyor belt 1 to reach the light receiving unit 130 Thus, by precisely measuring the height of the surface of the conveyor belt 1 driven under severe environmental conditions, the safety of driving the conveyor belt 1 can be greatly improved.

Referring to FIG. 5, the second air injection unit 142 may spray air from the top to the bottom toward the light transmitting window 123 through which the laser is emitted and the light receiving window 133 through which the reflected light is transmitted. have.

That is, the second air injection unit 142 removes dust and foreign substances floating or buried in front of the light transmitting window 123 from which the laser is directly emitted and the light receiving window 133 that is directly received, and the conveyor belt driven in harsh environmental conditions By precisely measuring the height of the surface of the conveyor belt, the safety of driving the conveyor belt can be greatly improved.

Referring to FIG. 6, the third air injection unit 143 may inject air toward the surface of the conveyor belt 1 to which the laser is irradiated. In this case, the third air injection unit 143 may include a position adjusting means 143a capable of adjusting a length and a direction.

That is, the third air injection unit 143 removes dust and foreign substances by spraying air directly on the surface where the laser reaches and reflects from the conveyor belt 1, and thus the surface of the conveyor belt 1 driven under severe environmental conditions. By precisely measuring the height, the safety of driving the conveyor belt 1 can be greatly improved.

7 and 8 show a wear check device and a light shielding part of the conveyor belt according to each embodiment of the present invention.

Referring to FIG. 7, the apparatus for confirming wear of the conveyor belt may further include a light blocking unit 150 that blocks external light from flowing into the surface to which the laser is irradiated.

As described above, in the apparatus for checking wear of the conveyor belt, the cap part 111 is formed on the body part 110 so that dust and foreign matters float in front of the light-emitting part 120 and the light-receiving part 130, or external light is transferred to the light-receiving part 130. The light-blocking unit 150 is primarily blocked from being received, and further includes a light-shielding unit 150 that can cover the area in which the wear checking device of the conveyor belt is installed in the conveyor belt 1, so that dust and foreign substances are removed from the light emitting unit 120 and the light receiving unit. (130) It is possible to block more effectively from floating in front or from receiving external light by the light receiving unit 130.

In this case, the light blocking unit 150 may include a light blocking film 152 made of a soft material and a light blocking unit support 151 that is capable of adjusting a light blocking area by adjusting a length. For example, the light blocking part support 151 may be adjustable in length in the transverse and longitudinal directions.

Therefore, the light blocking area can be widened by opening the light blocking unit support 151 in consideration of the installation environment of the conveyor belt or the irradiation angle of external light, and when external light is not received by the light receiving unit 130, dust and foreign matter will escape. The light shielding part support 151 may be folded to be able to do so.

Referring to FIG. 8, the apparatus for confirming wear of the conveyor belt may further include a dust suction device 160 for discharging dust and foreign substances in the light blocking unit 150 to the outside.

That is, even in the state where the light blocking support 151 is unfolded to widen the light blocking area as much as possible, dust and foreign substances floating around the wear check device of the conveyor belt are removed to the outside through the dust suction device 160 to drive under severe environmental conditions. By precisely measuring the height of the surface of the conveyor belt 1, the safety of driving the conveyor belt 1 can be greatly improved.

9 illustrates a pixel in which an image is formed in a light receiving unit according to an embodiment of the present invention.

The above-described control unit measures the intensity of light entering the light-receiving sensor 131 after the laser emitted from the laser light source 121 is reflected on the conveyor belt 1, and the conveyor belt 1 by optical trigonometry. The distance and displacement to the surface are measured, and through this, the height of the surface of the conveyor belt 1 can be measured.

For example, the line laser emitted from the light emitting unit 120 has a smaller line width than the damage of the conveyor belt 1, for example, cracks, grooves, etc., but the light receiving unit 130 reflects it from the conveyor belt 1 The pixel coordinates corresponding to each position, that is, a plurality of pixel values, are extracted from such light information.

For example, the control unit extracts a first pixel value from the image of laser light reflected from both ends of the conveyor belt 1, and then performs a brightness difference algorithm from the image of the laser light reflected from the conveyor belt 1 between the both ends. The second pixel value to the nth pixel value is extracted using the method, and the difference in distance between the extracted first pixel value and the second pixel value to the nth pixel value is calculated by the optical triangulation method, and the wear of the conveyor belt 1 You can check the degree and damage in real time.

For example, when the n-th pixel value in which the distance difference from the first pixel value is sharply larger than other pixel values is detected, the part of the conveyor belt 1 where the n-th pixel value is detected is a damaged part. It is detected, and a notification may be sent to the user or the drive of the conveyor belt 1 may be stopped.

For example, an image of a line laser reflected from the conveyor belt 1 and received by the light receiving unit 130 includes a plurality of pixels, and the maximum value of the brightness difference between pixels formed in the image is calculated and zero-crossing The center point of the point to be) can be determined as a corresponding pixel value.

For example, referring to FIG. 9, the controller may calculate a center point of the zero-crossed point up to a sub-pixel unit. That is, by detecting where the center point of the zero-crossing point is in the pixel, the pixel value within the pixel is determined as 1/4 pixel, 1/8 pixel, 1/16 pixel, and 1/64 pixel. I can.

The control unit may detect information on the remaining thickness of the conveyor belt 1 from height information on the surface of the conveyor belt.

For example, the control unit stores information about the initial thickness (A) of the conveyor belt, and when a height difference (L) from both ends (first pixel) in the n-th pixel is detected, the thickness (AL) in the n-th pixel Is calculated. In this case, when the thickness (A-L) of the n-th pixel is smaller than or equal to (A-L ≤ B) than the preset limit thickness (B) of the conveyor belt 1, the control unit may generate a notification. In this case, the notification may include stopping the driving of the conveyor belt 1.

10 to 13 illustrate measuring the height of a surface of a conveyor belt from a pixel on which an image is formed in a light receiving unit according to an embodiment of the present invention.

For example, the controller may generate a notification from height information of the conveyor belt surface.

For example, as shown in FIG. 10, the light-receiving unit can recognize a pixel composed of N rows (y-axis direction) and M columns (x-axis direction), and the center point of the zero-crossing point is a pixel By detecting the location within the pixel, the pixel value within the pixel can be determined up to 1/64 pixel.

At this time, the warning step and the driving stop step may be classified according to the degree of wear based on both ends of the conveyor belt surface.

For example, when defining the center point of a zero-crossing point as a pixel value, the average value of the pixel values in a column (Standard left: Sl) from the left end and b columns (Standard right: Sr) from the right end ( A difference between S _a and the pixel value P _f determined in a row farthest from the average value S _{a in the} y-axis direction, that is, the farthest distance may be determined.

In this case, the pixel value (P _f ) determined in a row that is the farthest in the y-axis direction from the average value (S _a ), that is, the farthest distance, may select only a portion having a height lower than both ends of the conveyor belt surface. That is, the pixel value (P _f) may be the value on the bottom choice in the y-axis direction from the average value (S _a).

For example, among a total of M columns, the ratio (%) of the number of columns occupied by pixel values that differ from the average value (S _a ) and c or more rows (ie, c pixels) in the y-axis direction is, If more than the preset value d is satisfied, the notification may be generated.

For example, the average value (S _a) and, if the average value (S _a) that is the difference between the line number e with more than one pixel value of the pixel value (P _f) is determined in the row farthest away from the y-axis direction detected by, The notification can be generated.

In this case, a, b, c, d, and e may be preset by the user.

As an example, when _a pixel having a difference of two or more rows (ie, pixels) in the y-axis direction from the average value Sa satisfies the number of columns of 10% or more of the total number of columns, the notification may be generated. .

For example, when the difference between the number of rows of the average value (S _a ) and the pixel value (P _f ) determined in the row farthest from the average value (S _a ) in the y-axis direction is 7 or more, the notification may be generated. have.

For example, the notification may be divided into a warning step and a driving stop step.

As an example, the average value (S _a ) and f rows to g rows in the y-axis direction, specific examples, h% or more and less than i% of the total number of columns, in a pixel with a difference between 2 to 4 rows, For example, when 10% or more and less than 40% of the number of columns are satisfied, the warning step notification may be generated.

As an example, _a pixel with a difference between the average value (S _a ) and the y-axis direction f rows to g rows, specific examples, 2 to 4 rows, is at least i% of the total number of columns, specific example, 40 When the number of rows of% or more is satisfied, the notification of the driving stop step may be generated.

As an example, _a pixel having a difference between the average value (S _a ) and j rows to k rows in the y-axis direction, in a specific example, 5 to 6 rows, is h% or more of the total number of columns, and a specific example is 10 When the number of rows of% or more is satisfied, the notification of the driving stop step may be generated.

As an example, when _a pixel having a difference between the average value Sa and the y-axis direction is detected in a row, for example, seven or more rows, the driving stop step notification may be generated.

This will be described with reference to FIGS. 10 to 13 as follows. In the case of FIG. 10, the controller does not generate a notification. In the case of Figure 11, because the average value (S _a) and the y-axis direction by the difference of f to g rows one row I pixels are equal to at least i% of the total number of columns, the control unit generates the stop driving step notification. In the case of FIG. 12, since pixels having a difference between the average value S _a and f rows to g rows in the y-axis direction correspond to h% or more and less than i% of the total number of columns, the control unit generates a warning step notification. . In the case of FIG. 13, since pixels having a difference between the average value S _a and j rows to k rows in the y-axis direction correspond to h% or more of the total number of columns, the controller generates a driving stop step notification. .

Meanwhile, the controller may stop driving the conveyor belt system when the notification of the driving stop step occurs.

As described above, the safety management system of the conveyor belt of the present invention defines the area where the pixel value of the line laser received in the light receiving unit is located in units of rows and columns, and generates a notification in each step, thereby enabling accurate measurement of the degree of wear. And can greatly improve safety management efficiency.

14 is a schematic diagram showing a safety management system for a conveyor belt according to an embodiment of the present invention.

Referring to FIG. 14, the safety management system of the conveyor belt includes a wear check unit 20 and a control unit 10.

The wear check unit 20 may be applied to the above-described wear check device of the conveyor belt, and the control unit 10 may be applied to the aforementioned control unit.

As described above, from the height information of the conveyor belt measured based on both ends of the conveyor belt detected by the wear check unit 20, the control unit 10 can check the degree of wear and damage of the conveyor belt in real time, When the thickness of the worn and damaged area on the conveyor belt has a thickness that is less than a preset residual thickness, a notification may be generated. In this case, the notification may include stopping the driving of the conveyor belt.

As described above, a detailed description of the present invention has been made by an embodiment with reference to the accompanying drawings, but the above-described embodiment has been described with reference to a preferred example of the present invention, so that the present invention is limited to the above embodiment. It should not be understood, and the scope of the present invention should be understood as the following claims and equivalent concepts.

For example, the drawings schematically show each component as a subject to aid understanding, and the thickness, length, number, etc. of each component shown may be different from the actual one in the progress of drawing creation. In addition, the material, shape, dimensions, etc. of each constituent element shown in the above embodiments are not particularly limited as an example, and various changes can be made without substantially departing from the effects of the present invention.

1: conveyor belt
2: Raw material input section
3: Carrier roller
4: carrier roller support
5: tail pulley
100: wear check device
110: body part
111: cap portion
120: light emitting unit
121: laser light source
122: condensing lens
123: floodlight
130: light receiving unit
131: light receiving sensor
132: light receiving lens
133: light receiving window
141: first air injection unit
142: second air injection unit
143: 3rd air injection part
143a: position adjusting means
150: light shielding part
151: light shielding part support
152: shading film
160: dust suction device
10: control unit
20: wear check

Claims (14)

A light emitting unit that emits a line laser to the conveyor belt;
A light receiving unit for receiving the light reflected by the conveyor belt;
A control unit that extracts a plurality of pixel values received from the light receiving unit and measures the height of the surface of the conveyor belt; And
A light blocking unit that blocks external light from flowing into the surface to which the laser is irradiated;
Including,
The laser is emitted to the surface of the conveyor belt in contact with the tail pulley,
The light-shielding unit includes a light-shielding portion support for adjusting a light-shielding area by adjusting a light-shielding film of a soft material and a length thereof. The method according to claim 1,
An apparatus for confirming wear of a conveyor belt, further comprising an air injection unit for removing dust and foreign matter. The method according to claim 2,
The air injection unit includes a first air injection unit disposed between the light emitting unit and the light receiving unit to inject air toward a path through which the laser emitted from the light emitting unit is reflected from the conveyor belt and reaches the light receiving unit, Conveyor belt wear check device. The method according to claim 2,
The air injection unit includes a second air injection unit for injecting air from an upper to a lower direction toward a light transmitting window through which the emitted laser is transmitted and a light receiving window through which the reflected light is transmitted, . The method according to claim 2,
The air injection unit includes a third air injection unit for injecting air toward the surface of the conveyor belt to which the laser is irradiated,
The third air injection unit includes a position adjusting means capable of adjusting a length and a direction to remove dust and foreign matter from the laser reaching surface of the conveyor belt. delete delete The method according to claim 1,
A device for checking wear of a conveyor belt, further comprising a dust suction device for discharging dust and foreign substances in the light shielding part to the outside. The method according to claim 1,
The control unit detects information on the remaining thickness of the conveyor belt from height information on the surface of the conveyor belt. The method of claim 9,
The control unit generates a notification when a surface having a thickness thinner than a preset residual thickness is detected on the conveyor belt, the apparatus for checking wear of the conveyor belt. delete A light emitting unit that emits a line laser to the conveyor belt;
A light receiving unit that receives the light reflected by the conveyor belt and recognizes a pixel composed of N rows (y-axis direction) and M columns (x-axis direction); And
A control unit that extracts a plurality of pixel values received from the light receiving unit and measures the height of the surface of the conveyor belt;
Including,
The control unit,
Extracting a first pixel value from the image of the laser reflected from both ends of the conveyor belt;
Extracting a second pixel value to an n-th pixel value from the image of the laser reflected between the both ends of the conveyor belt using a brightness difference algorithm; And
Calculating a distance difference between the extracted first pixel value and the second pixel value to the n-th pixel value by an optical triangulation method, and checking the degree of wear and damage of the conveyor belt in real time;
Including,
The control unit includes an average value (Sa) of pixel values of a column previously stored from the left end of the pixel recognized by the light receiving unit and b columns stored in advance from the right end, and the farthest in the y-axis direction from the average value (Sa). A safety management system of a conveyor belt, which calculates a difference between the pixel values Pf determined in the row and generates a notification when at least one of the following cases is true.
(1) Among the M columns, the ratio (%) of the number of columns occupied by pixel values with differences between the average value (Sa) and c or more rows previously stored in the y-axis direction is equal to or greater than a preset value (d). If you are satisfied
(2) The difference in the number of rows between the average value (Sa) and the pixel value (Pf) determined in the row farthest from the average value (Sa) in the y-axis direction is detected by a predetermined value (e) or more. If
(3) A pixel having a difference between the average value (Sa) and the f to g rows previously stored in the y-axis direction from the average value (Sa) satisfies h% or more and less than i% of the total number of columns. If
(4) When the pixel with a difference between the average value (Sa) and the f rows or g rows previously stored in the y-axis direction satisfies i% or more of the total number of columns The method of claim 12,
The pixel value extracted by the control unit is a center point of a point at which the laser is received and zero-crossed from the maximum value of the brightness difference between the plurality of pixels formed on the image of the light receiving unit. The safety management system of the conveyor belt, which is determined by the pixel value of the point reflected from. The method of claim 12,
The notification includes generating a warning step notification in the case of (3), and generating a driving stop step notification in the case of (4).

Images