JP7093967B2 - Inspection system - Google Patents

Description

The present invention relates to an inspection system for a geomembrane sheet of a disposal site having a slope.

At the landfill disposal site for waste, water-impervious work will be carried out using a water-impervious sheet or the like. In the impermeable work, pinholes may occur when the impermeable sheet is manufactured or laid at the site, or a joint defect may occur at the joint portion of the impermeable sheet. The watertightness of the impermeable structure has been confirmed by various inspections, and one example is the spark inspection.

As a spark inspection, after laying a water-impervious sheet on the conductive mat, press it from the water-impervious sheet with a sheet holding member so that the water-impervious sheet and the conductive mat are in close contact with each other and follow the contact portion. There is a method of detecting a pinhole by arranging an electrode brush on a water-impervious sheet. In this method, the electrode brush and the sheet pressing member are manually operated (see, for example, Patent Document 1).

The electrode brush for spark inspection is a conductor such as brass. If there is a defect such as a pinhole on the water-impervious sheet and there is a problem with watertightness, the electrode brush serves as the anode and the conductive layer (conducting mat, etc.) on the back of the water-impervious sheet acts as the cathode to energize. The existence of defective parts can be detected.

Japanese Patent No. 6087656

However, since the landfill site is often shaped like a mortar, when a worker goes up and down to inspect the slope, a rope ladder as a work floor or a rope ladder is used according to the movement of the inspection range. It is necessary to use a master rope or safety belt for work at heights. Therefore, improvement in safety and workability has been required.

As a method for workers to inspect the slope without going up and down, there is also a method of connecting a rope to the electrode brush and pulling it up from above, but it is a water-impervious sheet due to unevenness on the slope or temperature shrinkage due to temperature fluctuations. In the wrinkled state, the electrode brush may not have reliably stroked the surface of the impermeable sheet to be inspected, leaving doubts about the reliability of the inspection.

The present invention has been made in view of the above-mentioned problems, and an object thereof is an inspection capable of ensuring safety at the time of slope inspection and improving work efficiency and inspection reliability. To provide a system.

In order to achieve the above-mentioned object, the present invention is an inspection system for a geomembrane sheet of a disposal site having a slope, and a master unit that moves laterally on a flat portion at the top of the slope and the master. A slave unit that is towed by the machine and moves in the vertical direction along the slope is provided, and the slave unit is provided with a detection portion facing the water-impervious sheet and front and rear of the detection portion in the moving direction. It is an inspection system having a roller and a position observing unit for observing the position of the detection portion, and the roller has at least the same width as the detection portion .

In the present invention, the slave unit having the detection portion moves up and down along the slope by being pulled by the master unit that moves laterally on the flat portion of the top of the slope, so that the worker can move. You don't have to go up and down the slope. Therefore, safety at the time of slope inspection can be ensured and work efficiency can be improved. In addition, by providing rollers in front of and behind the moving direction of the detection portion, the surface of the impermeable sheet can be scanned by the detection portion while the wrinkles of the impermeable sheet to be inspected are smoothed by the rollers. Reliability can be improved.

It is desirable that the axis of the roller is divided into a plurality of parts in the width direction.
It is desirable that the slave unit has a frame-shaped main body, and the roller and the detection portion are connected to the main body.
This makes it possible to reduce the weight of the slave unit to a minimum suitable for pressing the detection portion against the water-impervious sheet while maintaining stability during movement.

It is desirable that one end of the kaishakunin rope extending downward on the slope is connected to the main body, and the other end of the kaishakunin rope can be operated by the flat portion at the lower end of the slope.
As a result, even if there is unevenness on the slope, it is possible to control the movement direction of the slave unit so that it does not deviate.

One end of the tow rope extending upward on the slope is connected to the main body, and the other end of the tow rope is wound or unwound by a winch provided in the master unit to cause the slave unit. Is desirable to be towed by the master unit.
As a result, the slave unit can be moved up and down along the slope at an appropriate speed. In addition, the use of a tow rope reduces the possibility of scratches on the geomembrane sheet of the shoulder due to rubbing, as compared with the case of using a wire for towing.

It is desirable that one end of the tow rope is connected to the vicinity of the height at which the center of gravity of the slave unit is located.
As a result, the slave unit can be moved in a stable posture, and it is possible to prevent the slave unit from tipping over while moving.

The detection portion is an electrode brush for spark inspection, and is attached to the main body so as to come into contact with the water-impervious sheet at a position separated from the roller, and the electrode brush changes the length of hair stepwise. It is desirable that it is a new one .
As a result, the water-impervious sheet can be stroked with the electrode brush while the water-impervious sheet is held by the rollers in the front-rear direction in the moving direction of the electrode brush, so that the inspection can be reliably performed even if the water-impervious sheet has wrinkles.

Further, a display means may be provided which captures the data of the position observation unit and displays the inspected range and the defective position of the water-impervious sheet.
Further, a notification means for notifying when the defective position of the water-impervious sheet is detected may be further provided.
As a result, the worker can easily grasp the inspected range and the defect position of the impermeable sheet.
Further, the notification means may directly mark the defective position on the slope detected by the detection portion.
Further, both ends of the rotating shaft of the roller may be fixed.
Further, the slave unit may be provided with a suspension so that the roller can be pressed against the slope.

According to the present invention, it is possible to provide an inspection system capable of ensuring safety at the time of slope inspection and improving work efficiency and inspection reliability.

The figure which shows the outline of inspection system 1. The figure which shows the master unit 9. The figure which shows the slave unit 11 The figure which shows the detection method of the pinhole etc. by the slave unit 11 The figure which shows the detection method of the pinhole etc. by the slave unit 11 The figure which shows the inspected range 43 The figure which shows the movement of the master unit 9 and the slave unit 11 at the time of inspection. The figure which shows the state which put the slave unit 11 on the slope 47 of a master unit 9. Diagram showing examples of other electrode brushes The figure which shows the movement of the master unit 9 and the slave unit 11 at the time of inspection.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram showing an outline of the inspection system 1. FIG. 2 is a diagram showing the master unit 9, and is a view of the master unit 9 viewed from the direction of the arrow A shown in FIG. FIG. 3 is a diagram showing a slave unit 11. In FIG. 3, the slope 3 is shown horizontally.

As shown in FIG. 1, the landfill site 2 is formed by excavating the ground in a mortar shape, and is formed on a flat bottom 4, a slope 3 provided around the bottom 4, and the top of the slope 3. It has a flat portion 5 provided. In the landfill disposal site 2, a plurality of steps of slopes 3-1 and 3-2 ... Are provided, and a flat portion 5 is provided at the top end of each slope 3-1 and 3-2 ....

A geomembrane sheet 7 is laid on the inner surface of the landfill 2, that is, the bottom 4, the slope 3, and the flat portion 5. The water-impervious sheet 7 has a conductive layer on the back surface or a conductor is arranged on the lower surface. Further, on the shoulder near the boundary between the flat portion 5 and the slope 3, the surface of the water-impervious sheet 7 is covered with the protective sheet 19.

The inspection system 1 is a system for inspecting the watertightness of the impermeable sheet 7 laid on the slope 3 of the landfill disposal site 2. The inspection system 1 includes a master unit 9, a slave unit 11, and the like.

As shown in FIG. 2, the master unit 9 includes a gantry 21, a traveling device 23, a generator 25, a GNSS measuring machine terminal 27, a reel 29, a winch 31 and the like. The gantry 21 is the main body of the master unit 9. The traveling device 23 is, for example, an endless track, and is provided at the lower part of the gantry 21. Commercially available crawler carriers may be used as the gantry 21 and the traveling device 23.

The generator 25, the GNSS measuring machine terminal 27, the reel 29, and the winch 31 are mounted on the gantry 21. The generator 25 is a generator for the spark tester main body 39 (FIG. 3) described later, and one end of the power cord 15 is connected to the generator 25. The reel 29 winds up the power cord 15. The GNSS measuring device terminal 27 is a measuring terminal for the GNSS receiver 41 (FIG. 3) described later. The winch 31 is used for moving the slave unit 11, and one end of the tow rope 13 is connected to the winch 31.

The master unit 9 further has a ground wire, a display means, and a notification means (not shown). The ground wire is grounded to the end of the water-impervious sheet 7 to be inspected. The display means displays the inspected range and the defect position on the water-impervious sheet 7. The notification means notifies when a defect position is detected.

As shown in FIG. 3, the slave unit 11 includes a gantry 37, a roller 33, an electrode brush 35, a testing machine main body 39, a GNSS receiver 41, and the like. The gantry 37 is the main body of the slave unit 11 and has a frame shape. Although not shown in FIG. 3, the corners of the gantry 37 are chamfered so as not to damage the water-impervious sheet 7.

The electrode brush 35 is a detection portion in the spark inspection, and is, for example, a brush having a uniform hair length. The electrode brush 35 is arranged so that the flocked surface faces the impermeable sheet 7, and is connected to the gantry 37 so that the hair portion comes into contact with the impermeable sheet 7 below the gantry 37.

The electrode brush 35 may be rigidly coupled to the gantry 37 or may be suspended from the gantry 37. Further, it is desirable that the electrode brush 35 is removable from the gantry 37.

The rollers 33 are not only a means for pressing the water-impervious sheet 7 but also a means for traveling the slave unit 11, and are provided before and after the moving direction (left-right direction in FIG. 3) of the electrode brush 35. It is desirable that the roller 33 has at least the same width as the electrode brush 35. Further, the diameter of the roller 33 is assumed to exceed the height of the wrinkle 45 (FIG. 1 and the like) of the water-impervious sheet 7. The roller 33 has, for example, a wheel portion made of an insulating member made of vinyl chloride or the like, and a rotating shaft (not shown) made of steel. However, if the wheel portion of the roller 33 and the electrode brush 35 are sufficiently separated from each other and there is no possibility of conduction, the wheel portion may also be made of steel.

In the roller 33, a rotation shaft (not shown) is connected to the lower part of the gantry 37. The smaller the distance between the two rollers 33, the easier it is to hold the water-impervious sheet 7, but the larger the separation, the better the stability of the slave unit 11. Therefore, when determining the position of the roller 33, the degree of pressing of the water-impervious sheet 7 and the stability of the slave unit 11 are taken into consideration.

The testing machine main body 39 and the GNSS receiver 41 are mounted on the gantry 37. The testing machine main body 39 is a testing machine for spark inspection, and a power cord 15 extending from the reel 29 of the master unit 9 is connected to the testing machine main body 39. The testing machine main body 39 is connected to the electrode brush 35 by a cord (not shown).

The GNSS receiver 41 is a position observation unit that observes the position of the electrode brush 35. As shown in FIGS. 1 and 5, it is desirable that the GNSS receiver 41 is located directly above the electrode brush 35 in the vertical direction with the slave unit 11 installed on the slope 3.

One end of the kaishakunin rope 17 is connected to the lower side (left side in FIG. 3) of the slope 3 of the gantry 37. The kaishakunin rope 17 is connected to two places of the gantry 37, is combined into one on the way, and extends downward on the slope 3 as shown in FIG. The other end of the kaishakunin rope 17 can be operated by the bottom portion 4, which is a flat portion at the lower end of the slope 3.

The end of the tow rope 13 extending from the winch 31 of the master unit 9 is connected to the upper side of the slope 3 of the gantry 37 (on the right side in FIG. 3). The tow rope 13 is connected to the vicinity of the height where the center of gravity of the slave unit 11 is located. Further, as shown in FIG. 1, it is desirable that the tow rope 13 is connected to a position where the tow rope 13 does not rub against the slope while the slave unit 11 is installed on the slope 3.

Next, the inspection method by the inspection system 1 will be described. 4 and 5 are diagrams showing a method of detecting a pinhole or the like by the slave unit 11, FIG. 4A shows a state in which the slave unit 11 is located above the slope 3, and FIG. 4B shows a state in which the slave unit 11 is located above the slope 3. The state where the slave unit 11 is located below the slope 3 is shown.

In order to inspect the watertightness of the impermeable sheet 7 on the slope 3 of the landfill site 2 using the inspection system 1, first, as shown in FIGS. 1 and 4, the slope 3 is prepared as a preparation for the inspection. The master unit 9 is arranged on the flat portion 5 at the top end. The master unit 9 can be moved in the lateral direction (direction of arrow C shown in FIG. 4A) by the traveling device 23.

Further, the slave unit 11 is arranged on the slope 3. The slave unit 11 is towed by the master unit 9 by winding or unwinding the tow rope 13 with the winch 31 of the master unit 9, and is pulled in the vertical direction along the slope 3 (arrow shown in FIG. 4A). It is possible to move in the direction of D).

Further, the cathode of the tester main body 39 is connected to a conductive layer (or a conductor) under the water-impervious sheet 7 (not shown).

To perform the inspection, a voltage is applied between the electrode brush 35 and the conductive layer (or the conductor) using the testing machine main body 39, and the tow rope is in contact with the electrode brush 35 in contact with the water-impervious sheet 7. The 13 is wound or unwound, and the slave unit 11 is moved up and down along the slope 3.

When the slave unit 11 is moved along the slope 3, the electrode brush 35 scans on the water-impervious sheet 7. At this time, if there is no problem such as a pinhole or a poor connection in the water-impervious sheet 7, the electrode brush 35 and the conductive layer (or the conductor) are insulated by the water-impervious sheet 7 and no electric discharge occurs. If there is a problem with the water-impervious sheet 7, it will not be insulated and an electric discharge will occur. In this way, by bringing the electrode brush 35 into contact with the water-impervious sheet 7 and detecting the discharge, the presence or absence of a defect is detected.

In the inspection system 1, the range scanned by the electrode brush 35 as the slave unit 11 moves becomes the inspected range. For example, when the slave unit 11 moves from the position shown in FIG. 4A to the position shown in FIG. 4B, the range 43 shown in FIG. 4B is inspected.

When the slave unit 11 is moved along the slope 3, as shown in FIG. 5, the upper roller 33a and the lower roller 33b of the slope 3 of the slave unit 11 press the water-impervious sheet 7. As a result, the wrinkle 45 of the water-impervious sheet 7 is pressed so as not to interfere with scanning by the electrode brush 35, and the slave unit 11 does not get caught or run on the wrinkle 45.

When moving the slave unit 11 along the slope 3, a worker operates the other end of the kaishakunin rope 17 at the bottom 4 at the lower end of the slope 3. As a result, even if there is unevenness on the slope 3, the moving direction of the slave unit 11 will not be deviated due to being dragged by the unevenness.

When the slave unit 11 is moved along the slope 3, the position of the electrode brush 35 specified by the GNSS receiver 41 is acquired by the GNSS measuring machine terminal 27. Then, the inspected range 43 obtained based on the trajectory data of the electrode brush 35 acquired by the GNSS measuring machine terminal 27 and the width data of the electrode brush 35 and the defect position detected by the electrode brush 35 are set to the parent. It is displayed on a display means (not shown) provided on the machine 9. Further, when the defective position is detected by the electrode brush 35, a warning sound is given by a notification means (not shown) of the master unit 9. The notification means (not shown) may be one that marks the defective position detected by the electrode brush 35 with paint or the like.

FIG. 6 is a diagram showing the inspected range 43, and FIG. 7 is a diagram showing the movements of the master unit 9 and the slave unit 11 at the time of inspection. FIG. 8 is a diagram showing a state in which the slave unit 11 is placed on the slope 47 of the master unit 9.

As shown in FIG. 6, the inspection of the water-impervious sheet 7 on the slope 3 of the landfill site 2 is carried out so that the inspected range 43 partially overlaps with another inspected range 43 adjacent to the landfill site 2. When the width of the electrode brush 35 is about 90 cm, it is desirable that the width of the overlap is about 15 cm.

In order to inspect the geomembrane sheets 7 so that the inspected ranges 43 partially overlap each other, first, as shown in FIG. 7, the master unit 9 is arranged at one end of the flat portion 5. Then, the slave unit 11 is reciprocated in the vertical direction along the slope 3 as shown by the solid arrow. After that, the work of moving the master unit 9 and the slave unit 11 in the horizontal direction as shown by the white arrows and the work of reciprocating the slave unit 11 in the vertical direction along the slope 3 are repeated.

In order to move the master unit 9 and the slave unit 11 laterally on the flat portion 5, as shown in FIG. 8, a slope 47 is attached to the slope 3 side of the master unit 9 and upward along the slope 3. Place the handset 11 that has moved to the slope 47 on the slope 47. If the master unit 9 is moved laterally in this state, the slave unit 11 can be moved laterally at the same time as the master unit 9.

When the slope 3 of the landfill site 2 consists of a plurality of slopes 3-1 and 3-2 ..., after the inspection of the slope 3 of one stage is completed, the flat portion 5 of the next stage is used as a parent. The machine 9 and the handset 11 are moved to inspect the slope 3 of the next stage. The inspection of the water-impervious sheet 7 of the flat portion 5 can be easily performed by manually moving the electrode brush.

As described above, in the present embodiment, the slave unit 11 having the electrode brush 35 is pulled to the slope 3 by being pulled by the master unit 9 that moves laterally on the flat portion 5 of the top end of the slope 3. Since it moves up and down along the slope, the worker does not have to go up and down the slope 3. Therefore, safety at the time of inspection of the slope 3 can be ensured and work efficiency can be improved. Further, by providing the rollers 33 in front of and behind the moving direction of the electrode brush 35, the surface of the water-impervious sheet 7 is scanned by the electrode brush 35 in a state where the wrinkles 45 of the water-impervious sheet 7 to be inspected are stretched by the rollers 33. Therefore, the reliability of the inspection can be improved.

In the present embodiment, the gantry 37 of the slave unit 11 has a frame shape, and the roller 33 and the electrode brush 35 are connected to the gantry 37. Therefore, the slave unit 11 can have a minimum weight suitable for pressing the electrode brush 35 against the water-impervious sheet 7 while maintaining stability during movement.

In the present embodiment, one end of the tow rope 13 is connected to the gantry 37 of the slave unit 11, and the other end of the tow rope 13 is wound or unwound by a winch 31 provided in the master unit 9. The machine 11 is towed by the master machine 9. As a result, the slave unit 11 can be moved vertically along the slope 3 at an appropriate speed. Further, by using the tow rope 13 and covering the shoulder with the protective sheet 19, the possibility that the water-impervious sheet 7 of the shoulder is damaged by rubbing is reduced as compared with the case where the wire is used for towing. Further, by connecting one end of the tow rope 13 to the vicinity of the height where the center of gravity of the slave unit 11 is located, the slave unit 11 can be moved in a stable posture, and the slave unit 11 can be prevented from tipping over during movement. .. If the tow rope 13 is connected near the height where the center of gravity of the slave unit 11 is located, the friction between the tow rope 13 and the shoulder is caused during the movement of the slave unit 11 as compared with the case where the tow rope 13 is connected to a position lower than the center of gravity. It can also be made less likely to occur.

The inspection system 1 takes in the data of the GNSS receiver 41 and displays the inspected range 43 of the impermeable sheet 7 and the defective position, and the notification means for notifying when the defective position of the impermeable sheet 7 is detected. Has. Therefore, the worker can easily grasp the inspected range 43 and the defect position of the water-impervious sheet 7.

In the present embodiment, the electrode brush 35 having a uniform hair length is used as the detection portion, but the detection portion is not limited to this.

FIG. 9 is a diagram showing an example of another electrode brush. The electrode brush may have a stepwise change in hair length as shown in FIG. 9 (a), or may be in a roll shape as shown in FIG. 9 (b). .. By using an electrode brush having a shape as shown in the example shown in FIG. 9, it is possible to improve the followability of the slope 3 to the non-landing and detect the defective position even when there is a non-landing.

Further, in the present embodiment, the slave unit 11 is reciprocated up and down at the same position of the water-impervious sheet 7 and each range 43 is scanned twice by the electrode brush 35, but the outward route and the return route of the slave unit 11 are the same. It does not have to be in the position of.

FIG. 10 is a diagram showing the movements of the master unit 9 and the slave unit 11 at the time of inspection. In the example shown in FIG. 10, first, the master unit 9 is arranged at one end of the flat portion 5 at the top of the slope 3. Then, the slave unit 11 is moved downward along the slope 3 as shown by the solid arrow. Next, after moving the master unit 9 laterally on the flat portion 5 and the slave unit 11 near the bottom portion 4 as shown by the white arrow, the slave unit 11 is moved to the slope 3 as shown by the solid arrow. Move upward along. After that, the work of moving the master unit 9 and the slave unit 11 laterally on the flat portion 5, the work of moving the slave unit 11 downward along the slope 3, and the work of moving the master unit 9 on the flat portion 5 The work of moving the handset 11 laterally near the bottom 4 and the work of moving the handset 11 upward along the slope 3 are repeated. In the example shown in FIG. 10, the range 43a and the range 43b are scanned once by the electrode brush 35.

Even in this case as well, when moving the master unit 9 and the slave unit 11 laterally on the flat portion 5, it is desirable to place the slave unit 11 on the slope 47 attached to the master unit 9 as shown in FIG. .. Since the handset 11 is relatively lightweight, it can be manually moved when the handset 11 is moved laterally near the bottom 4.

In the present embodiment, the kaishakunin rope 17 is used to assist the traveling of the slave unit 11, but the traveling of the slave unit 11 is assisted by indicating the traveling direction on the slope 3 using a laser or the like for surveying. May be good. Further, the shaft of the roller 33 may be divided into a plurality of parts to cope with the unevenness of the slope 3, or a suspension may be provided to press the roller 33 against the slope 3.

Further, it is not essential to install the power cord 15 for connecting the generator 25 of the master unit 9 and the tester main body 39 of the slave unit 11. The generator 25 and the power cord 15 may be omitted, and the battery mounted on the slave unit 11 may be used as the power source for the tester main body 39.

Although the preferred embodiment of the present invention has been described above with reference to the accompanying drawings, the present invention is not limited to such an example. It is clear that a person skilled in the art can come up with various modified examples or modified examples within the scope of the technical idea disclosed in the present application, and these also naturally belong to the technical scope of the present invention. Understood.

1 ………… Inspection system 2 ………… Landfill disposal site 3,3-1, 3-2 ………… Slope 4 ………… Bottom 5 ………… Flat part 7 ………… Impermeable sheet 9 ………… Parent Machine 11 ………… Slave unit 13 ………… Tow rope 15 ………… Power cord 17 ………… Interference rope 19 ………… Protective sheet 21, 37 ………… Stand 23 ………… Traveling device 25 ………… Generator 27 ………… GNSS measuring machine terminal 29 ………… reel 31 ………… winch 33, 33a, 33b ………… roller 35 ………… electrode brush 39 ………… testing machine body 41 ………… GNSS receiver 43 …… … Range 45 ……… Wrinkles 47 ……… Slope

Claims (12)

An inspection system for a geomembrane sheet at a disposal site with a slope.
A master unit that moves laterally on the flat part of the top of the slope,
A slave unit that is towed by the master unit and moves up and down along the slope.
Equipped with
The slave unit has a detection portion facing the water-impervious sheet, rollers provided before and after the movement direction of the detection portion, and a position observation unit for observing the position of the detection portion .
An inspection system in which the roller has at least the same width as the detection portion . The inspection system according to claim 1, wherein the axis of the roller is divided into a plurality of parts in the width direction. The inspection system according to claim 1 or 2 , wherein the slave unit has a main body in a frame shape, and the roller and the detection portion are connected to the main body. The third aspect of claim 3 , wherein one end of the kaishakunin rope extending downward on the slope is connected to the main body, and the other end of the kaishakunin rope can be operated by a flat portion at the lower end of the slope. Inspection system. One end of the tow rope extending upward on the slope is connected to the main body, and the other end of the tow rope is wound or unwound by a winch provided in the master unit to allow the slave unit to be wound up or unwound. The inspection system according to claim 3 or 4 , wherein the inspection system is towed by the master unit. The inspection system according to claim 5 , wherein one end of the tow rope is connected to the vicinity of a height at which the center of gravity of the slave unit is located. The detection portion is an electrode brush for spark inspection, and is attached to the main body so as to come into contact with the water-impervious sheet at a position separated from the roller, and the electrode brush changes the length of hair stepwise. The inspection system according to any one of claims 3 to 6 , wherein the inspection system is characterized by the above. The inspection system according to any one of claims 1 to 7 , further comprising a display means for displaying the inspected range and the defective position of the impermeable sheet by taking in the data of the position observation unit. .. The inspection system according to any one of claims 1 to 7 , further comprising a notification means for notifying when a defective position of the water-impervious sheet is detected. The inspection system according to claim 9, wherein the notification means directly marks a defect position on the slope detected by the detection portion. The inspection system according to any one of claims 1 to 10, wherein both ends of the rotating shaft of the roller are fixed. The inspection system according to any one of claims 1 to 11, wherein a suspension is provided on the slave unit and the roller can be pressed against the slope.

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