CN109855585A - A kind of wire ga(u)ging equipment and its measurement method of cable product - Google Patents
A kind of wire ga(u)ging equipment and its measurement method of cable product Download PDFInfo
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- CN109855585A CN109855585A CN201910039943.8A CN201910039943A CN109855585A CN 109855585 A CN109855585 A CN 109855585A CN 201910039943 A CN201910039943 A CN 201910039943A CN 109855585 A CN109855585 A CN 109855585A
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- 238000000691 measurement method Methods 0.000 title claims abstract description 14
- 238000005259 measurement Methods 0.000 claims abstract description 59
- 238000000034 method Methods 0.000 claims abstract description 19
- 238000001514 detection method Methods 0.000 claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000006073 displacement reaction Methods 0.000 claims description 3
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- 230000005389 magnetism Effects 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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Abstract
The present invention relates to the wire ga(u)ging equipments and its measurement method of a kind of cable product, belong to cable product detection field.The present invention includes frame, measurement line footpath room, incoming line component, line outlet component, data handling component.Cable causes the variation of angle by measuring chamber contact roller drive connecting rod, and the present invention measures cable diameter by the variation of angle.The method, using high-precision angular transducer, provides a kind of cable product linear diameter measurement method for existing cable product measurement method is single, precision, use condition are limited etc..
Description
Technical field
The present invention relates to the wire ga(u)ging equipments and its measurement method of a kind of cable product, belong to cable product detection neck
Domain.
Background technique
The product of measurement cable diameter is less at present, and the measuring device precision of cable diameter, accuracy are had nothing in common with each other, market
The device of upper measurement line footpath is substantially divided to two classes, contact measuring apparatus and non-contact measurement apparatus.Since engineering demand can be wanted
It seeks survival and produces the cable of different line footpaths, the size of cable diameter is influenced by cable cross-sectional area, realizes on-line measurement in the market
Device is seldom.
Measure the device of line footpath, the either still contactless all inevasible generation error of contact.
Linear diameter measurement also belongs to the scope of thickness measuring, and traditional measurement is exactly to be measured with micrometer or slide calliper rule.Thickness measuring
The method of degree has very much, such as thickness method of measurement, weight method, electrolysis method, light cut method, and above-mentioned measurement method can be to quilt
Detectable substance causes to damage, and measurement means are cumbersome, detection speed is slow, are chiefly used in sampling Detection, is not suitable for online production inspection
It surveys.In addition, x-ray fluorescence method, β ray backscattering method etc. belong to radioactive source measurement.Capacitance method, Magnetism measurement eddy current measurement
Method also has application.
There are many determinant of various measurement method applications, have plenty of disposable measurement, damage is caused to nor affect on
Measurement result measures under some need static conditions.Precision is that all measurement methods are pursued, and technique difference and engineering need
Ask different, required precision is also had nothing in common with each other.
In production detection process, shake is inevitable, either contact or contactless, due to engineering
The difference of demand and production technology, caused by influence factor it is also very much.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of cable product wire ga(u)ging equipment and its measurement methods, are used for
Solve the problems such as cannot achieve real-time detection in cable diameter measurement process, the measurement error that shake generates can not be reduced.
The technical solution adopted by the present invention is that: a kind of wire ga(u)ging equipment of cable product, including frame, measurement line footpath
Room, incoming line component, line outlet component, data handling component；
The frame assembly includes frame 18 and cap 19, and cap 19 is mounted on 18 left and right ends of frame；
The incoming line component 6 includes support arm I 13 and support arm II 14 and incoming line 6, support arm I 13 and support arm
II 14 upper ends are connect with 18 left side upper and lower ends of frame respectively, and incoming line is equipped between II 14 lower end of support arm I 13 and support arm
6；
The line outlet component 5 includes support arm III 11 and support arm IV 12 and line outlet 5, support arm III 11 and support
IV 12 upper end of arm is connect with 18 right side upper and lower ends of frame respectively, and outlet is equipped between IV 12 lower end of support arm III 11 and support arm
Mouth 5；
The measurement line footpath room includes θ angular measurement room I 20 and θ angular measurement room II 21, and structure is identical, θ angular measurement
Fixation kit I 2, roller I 4, spring I 15, connecting rod I 3, angular transducer I 1 are equipped in room I 20；It is equipped in θ angular measurement room II 21
Fixation kit II 9, roller II 7, spring II 16, connecting rod II 8, angular transducer II 10, connecting rod I 3, connecting rod II 8 are identical, roller I
4,7 structure of roller II is identical, and angular transducer I 1, angular transducer II 10 are symmetrically mounted on consolidating on the right side of 18 upper and lower bracket of frame
Place is set in positioning；I 2 upper end of fixation kit is connect with the middle part of 18 upper end bracket of frame, and roller I 4, spring I 15 are fixed on fixed group
In part I 2, prominent I 2 lower end of fixation kit in the lower end surface of roller I 4, the middle part of II 9 lower end of fixation kit and 18 lower end bracket of frame
Connection, roller II 7, spring II 16 are fixed in fixation kit II 9, prominent II 9 upper end of fixation kit in the upper surface of roller II 7,
I 3 one end of connecting rod is connect with angular transducer I 1, the center axis connection of the other end and roller I 4, II 8 one end of connecting rod and angle sensor
Device II 10 connects, the center axis connection of the other end and roller II 7, the center axis connection of I 15 one end of spring and roller I 4, the other end
It is connect in the middle part of 18 upper bracket of frame, the center axis connection of II 16 one end of spring and roller II 7, the other end and 18 lower bracket of frame
Middle part connection.
The data handling component includes PC machine 17, and PC machine 17 and angular transducer I 1, angular transducer II 10 pass through string
Mouth connection.
Preferably, the angular transducer I 1, angular transducer II 10 are all made of corner-type sensor.
Preferably, the roller I 4, angular transducer I 1 are connected to the both ends of connecting rod I 3 by axle sleeve respectively, roller II 7,
Angular transducer II 10 is connected to the both ends of connecting rod II 8 by axle sleeve respectively.
Preferably, the roller I 4, roller II 7 are all made of troughing roller.
A kind of measurement method of the wire ga(u)ging equipment of the cable product, includes the following steps:
Step 1: the cable product wire ga(u)ging equipment, I 1 axle center of measurement sensor to II 10 axis of sensor are installed
The vertical range H of the heart0；Measure the length a of connecting rod I 3, connecting rod II 8；Measure the radius r of roller I 4, roller II 7；
Step 2: cable product enters from incoming line 6；
Step 3: if in cable production of articles detection process when non-jitter, roller I 4 in cable product wire ga(u)ging equipment
It is contacted respectively with cable product upper and lower surface with roller II 7, connecting rod I 3 and 4 axle center of roller I place horizontal linear are formed at this time
The angle that horizontal linear where angle and connecting rod II 8 and 7 axle center of roller II is formed is θ, I 1 axle center of angular transducer and roller I
Horizontal linear hangs down where the vertical range of horizontal linear where 4 axle center and II 10 axle center of angular transducer and 7 axle center of roller II
Straight distance is h；II 21 measurement angle value θ of θ angular measurement room I 20 and θ angular measurement room；The value of cable diameter is d at this time；
Step 4: if shake upward or downward in cable production of articles detection process, line footpath are thicker or when attenuating, roller I 4
It is subjected to displacement with roller II 7, roller I 4 and roller II 7 drive angular transducer I 1 and angle by connecting rod I 3 and connecting rod II 8 respectively
The rotation axis rotation of sensor II 10 is spent, the angle that connecting rod I 3 and 4 axle center of roller I place horizontal linear are formed at this time is θ1, even
The angle that horizontal linear where bar II 8 and 7 axle center of roller II is formed is θ2；Where I 1 axle center of angular transducer and 4 axle center of roller I
The vertical range of horizontal linear is h1, the vertical range of horizontal linear where II 10 axle center of angular transducer and 7 axle center of roller II
For h2；θ angular measurement room I 20 and θ angular measurement room II 21 measure the angle value θ after variation1、θ2；The value of cable diameter is d ' at this time；
Step 5: cable product comes out from line outlet 5；
Step 6: value d, the d ' of cable diameter are calculated according to geometrical relationship for PC17 machine.
The beneficial effects of the present invention are: it is not affected by jitter during implementing measurement line footpath, it avoids shake and causes
The error of linear diameter measurement；Idler wheel inside radius r, fixed range H in linear diameter measurement formula0, connecting rod length a be fixed value, survey
It is not required to be limited by cable product difference line footpath when diameter；Cable diameter measurement is improved using the higher angular transducer of precision
Accuracy.
Detailed description of the invention
Fig. 1 is measurement flow chart of the present invention；
Fig. 2 is overall structure diagram；
Fig. 3 is frame sectional view；
Fig. 4 is measuring chamber schematic diagram；
Fig. 5 is non-jitter schematic diagram during cable detection；
Fig. 6 is upward shake schematic diagram during cable detection；
Fig. 7 is downward shake schematic diagram during cable detection；
Fig. 8 is thicker schematic diagram during cable detection；
Fig. 9 is the schematic diagram that attenuates during cable detection；
Figure 10 is roller I groove structure schematic diagram；
Figure 11 is roller II groove structure schematic diagram；
Figure 12 is angular transducer and connecting rod connection schematic diagram；
Figure 13 is angular transducer and frame connection schematic diagram；
Figure 14 is connecting rod and roller shaft connection schematic diagram；
Figure 15 is spring and frame, roller shaft connection schematic diagram；
Figure 16 is the connection schematic diagram of two measurement line footpath rooms and cable；
Figure 17 is cap schematic diagram；
Figure 18 is measuring device top view；
Figure 19 is frame and cap connection schematic diagram；
Figure 20 is the connection schematic diagram of idler wheel Yu one angle of fixation kit；
Figure 21 is the connection schematic diagram of idler wheel Yu another angle of fixation kit.
Each label in figure: 1- angular transducer I, 2- fixation kit I, 3- connecting rod I, 4- roller I, 5- line outlet, 6- inlet wire
Mouthful, 7- roller II, 8- connecting rod II, 9- fixation kit II, 10- angular transducer II, 11- support arm III, 12- support arm IV, 13-
Support arm I, 14- support arm II, 15- spring I, 16- spring II, 17-PC machine, 18- frame, 19- cap, 20- θ angular measurement room
I, 21- θ angular measurement room II.
Specific embodiment
In the following with reference to the drawings and specific embodiments, the invention will be further described, but the contents of the present invention are not limited to
The range.
Embodiment: as shown in Fig. 1-2 1, a kind of wire ga(u)ging equipment of cable product, including frame, measurement line footpath room, into
Line mouth component, line outlet component, data handling component；
The frame assembly includes frame 18 and cap 19, and cap 19 is mounted on 18 left and right ends of frame；
The incoming line component 6 includes support arm I 13 and support arm II 14 and incoming line 6, support arm I 13 and support arm
II 14 upper ends are connect with 18 left side upper and lower ends of frame respectively, and incoming line is equipped between II 14 lower end of support arm I 13 and support arm
6；
The line outlet component 5 includes support arm III 11 and support arm IV 12 and line outlet 5, support arm III 11 and support
IV 12 upper end of arm is connect with 18 right side upper and lower ends of frame respectively, and outlet is equipped between IV 12 lower end of support arm III 11 and support arm
Mouth 5；
The measurement line footpath room includes θ angular measurement room I 20 and θ angular measurement room II 21, and structure is identical, θ angular measurement
Fixation kit I 2, roller I 4, spring I 15, connecting rod I 3, angular transducer I 1 are equipped in room I 20；It is equipped in θ angular measurement room II 21
Fixation kit II 9, roller II 7, spring II 16, connecting rod II 8, angular transducer II 10, connecting rod I 3, connecting rod II 8 are identical, roller I
4,7 structure of roller II is identical, and angular transducer I 1, angular transducer II 10 are symmetrically mounted on consolidating on the right side of 18 upper and lower bracket of frame
Place is set in positioning；I 2 upper end of fixation kit is connect with the middle part of 18 upper end bracket of frame, and roller I 4, spring I 15 are fixed on fixed group
In part I 2, prominent I 2 lower end of fixation kit in the lower end surface of roller I 4, the middle part of II 9 lower end of fixation kit and 18 lower end bracket of frame
Connection, roller II 7, spring II 16 are fixed in fixation kit II 9, prominent II 9 upper end of fixation kit in the upper surface of roller II 7,
I 3 one end of connecting rod is connect with angular transducer I 1, the center axis connection of the other end and roller I 4, II 8 one end of connecting rod and angle sensor
Device II 10 connects, the center axis connection of the other end and roller II 7, the center axis connection of I 15 one end of spring and roller I 4, the other end
It is connect in the middle part of 18 upper bracket of frame, the center axis connection of II 16 one end of spring and roller II 7, the other end and 18 lower bracket of frame
Middle part connection.
The data handling component includes PC machine 17, and PC machine (17) passes through with angular transducer I 1, angular transducer II 10
Serial ports connection.
Further, the angular transducer I 1, angular transducer II 10 are all made of corner-type sensor.
Further, the roller I 4, angular transducer I 1 are connected to the both ends of connecting rod I (3), idler wheel by axle sleeve respectively
II 7, angular transducer II 10 is connected to the both ends of connecting rod II 8 by axle sleeve respectively.
Further, the roller I 4, roller II 7 are all made of troughing roller.
A kind of measurement method of the wire ga(u)ging equipment of the cable product, includes the following steps:
Step 1: the cable product wire ga(u)ging equipment, I 1 axle center of measurement sensor to II 10 axis of sensor are installed
The vertical range H of the heart0；Measure the length a of connecting rod I 3, connecting rod II 8；Measure the radius r of roller I 4, roller II 7；
Step 2: cable product enters from incoming line 6；
Step 3: if in cable product detection process when non-jitter, roller I 4 and rolling in cable product wire ga(u)ging equipment
It takes turns II 7 to contact with cable product upper and lower surface respectively, the angle that connecting rod I 3 and 4 axle center of roller I place horizontal linear are formed at this time
And the angle that horizontal linear where connecting rod II 8 and 7 axle center of roller II is formed is θ, I 1 axle center of angular transducer and 4 axis of roller I
The vertical range of horizontal linear where the heart and II 10 axle center of angular transducer it is vertical with 7 axle center of roller II place horizontal linear away from
From being h；II 21 measurement angle value θ of θ angular measurement room I 20 and θ angular measurement room；The value of cable diameter is d at this time；
Step 4: if shake, line footpath variation occur in cable production of articles detection process, roller I 4 and roller II 7 are sent out
Raw displacement, roller I 4 and roller II 7 drive angular transducer I 1 and angular transducer II 10 by connecting rod I 3 and connecting rod II 8 respectively
Rotation axis rotation, the angle that horizontal linear where connecting rod I 3 and 4 axle center of roller I is formed at this time is θ1, connecting rod II 8 and roller II
The angle that horizontal linear where 7 axle center is formed is θ2；Horizontal linear where I 1 axle center of angular transducer and 4 axle center of roller I hangs down
Straight distance is h1, the vertical range of horizontal linear is h where II 10 axle center of angular transducer and 7 axle center of roller II2；θ angular measurement
Room I 20 and θ angular measurement room II 21 measure the angle value θ after variation1、θ2；The value of cable diameter is d ' at this time；
Step 5: cable product comes out from line outlet 5；
Step 6: value d, the d ' of cable diameter are calculated according to geometrical relationship for PC17 machine.
Angle change is there is two kinds of situations, such as Fig. 6~9, be respectively upwards (or downwards) shake, line footpath it is thicker (or
Person attenuates), angle change terminate when, angular transducer I 1 detects that angle is horizontal straight where connecting rod I 3 and 4 axle center of roller I
The angle, θ that line is formed1, angular transducer II 10 detect angle be connecting rod II 8 and 7 axle center of roller II place horizontal linear formed
Angle, θ2；The angle that connecting rod and idler wheel axle center place horizontal linear are formed when non-jitter is denoted as the angle θ, as shown in Figure 5；Angle passes
The vertical range in I 1 axle center of sensor to II 10 axle center of angular transducer is H0, no matter there is non-jitter angular transducer I 1 axle center to angle
Spend the vertical range H in II 10 axle center of sensor0It will not change；Pass through the length a of connecting rod and angle θ, θ for measuring1、θ2, this number
Line footpath value can be calculated according to PC machine 17 will be sent to.
When specific calculating, it can be calculated according to plane geometry method:
Vertical range of I 1 axle center of angular transducer to II 10 axle center of angular transducer: H0=2h+2r+d；
There are shake or line footpath to cause angle change when changing, level where I 1 axle center of angular transducer to 4 axle center of roller I is straight
The vertical range of line are as follows: h1=a*cos θ1；
Vertical range of II 10 axle center of angular transducer to horizontal linear where 7 axle center of roller II are as follows: h2=a*cos θ2；
H when non-jitter0=2h+2r+d, wherein h=h1=h2=a*cos θ；
H when having shake0=h1+h2+ 2r+d ', wherein h1=a*cos θ1, h2=a*cos θ2；
For angular transducer to the vertical range of horizontal linear where idler wheel axle center, d ' is to have shake when wherein h is non-jitter
When the line footpath value that detects, the line footpath value that d is detected when being non-jitter, r is the inside radius of idler wheel, and as shown in figure 11, a is connecting rod
Length；
Final calculating is as follows:
When having shake: d '=H0-h1-h2-2r
When non-jitter: d0-2h-2r
θ, θ 1, θ 2 can be obtained in PC machine so as to which d, d ' is calculated,
As 1 θ 2 of θ=θ, it is d that detection line footpath actual value, which is calculated, in PC machine；
As 1 θ 2 of θ ≠ θ, it is d ' that detection line footpath actual value, which is calculated, in PC machine.
Above in conjunction with attached drawing, the embodiment of the present invention is explained in detail, but the present invention is not limited to above-mentioned
Embodiment within the knowledge of a person skilled in the art can also be before not departing from present inventive concept
It puts and makes a variety of changes.
Claims (5)
1. a kind of wire ga(u)ging equipment of cable product, it is characterised in that: including frame, measurement line footpath room, incoming line component, go out
Line mouth component, data handling component；
The frame assembly includes frame (18) and cap (19), and cap (19) is mounted on frame (18) left and right ends；
The incoming line component (6) includes support arm I (13) and support arm II (14) and incoming line (6), support arm I (13) and
Support arm II (14) upper end is connect with upper and lower ends on the left of frame (18) respectively, support arm I (13) and support arm II (14) lower end
Between be equipped with incoming line (6)；
The line outlet component (5) includes support arm III (11) and support arm IV (12) and line outlet (5), support arm III (11)
It is connect respectively with upper and lower ends on the right side of frame (18) with support arm IV (12) upper end, under support arm III (11) and support arm IV (12)
Line outlet (5) are equipped between end；
The measurement line footpath room includes θ angular measurement room I (20) and θ angular measurement room II (21), and structure is identical, θ angular measurement
Fixation kit I (2), roller I (4), spring I (15), connecting rod I (3), angular transducer I (1) are equipped in room I (20)；θ angular measurement
Fixation kit II (9), roller II (7), spring II (16), connecting rod II (8), angular transducer II (10) are equipped in room II (21),
Connecting rod I (3), connecting rod II (8) are identical, and roller I (4), roller II (7) structure are identical, angular transducer I (1), angular transducer II
(10) fixed position being symmetrically mounted on the right side of frame (18) upper and lower bracket；Fixation kit I (2) upper end and frame (18) upper end
The middle part of bracket connects, and roller I (4), spring I (15) are fixed in fixation kit I (2), and the lower end surface of roller I (4) is prominent solid
Determine component I (2) lower end, fixation kit II (9) lower end is connect with the middle part of frame (18) lower end bracket, roller II (7), spring II
(16) it is fixed in fixation kit II (9), prominent fixation kit II (9) upper end in the upper surface of roller II (7), connecting rod I (3) one end
It is connect with angular transducer I (1), the center axis connection of the other end and roller I (4), connecting rod II (8) one end and angular transducer II
(10) it connects, the center axis connection of the other end and roller II (7), the center axis connection of spring I (15) one end and roller I (4), separately
It is connect in the middle part of one end and frame (18) upper bracket, the center axis connection of spring II (16) one end and roller II (7), the other end and frame
Connection in the middle part of frame (18) lower bracket.
The data handling component includes PC machine (17), and PC machine (17) and angular transducer I (1), angular transducer II (10) are logical
Cross serial ports connection.
2. a kind of wire ga(u)ging equipment of cable product according to claim 1, it is characterised in that: the angular transducer
I (1), angular transducer II (10) are all made of corner-type sensor.
3. a kind of wire ga(u)ging equipment of cable product according to claim 1, it is characterised in that: the roller I (4),
Angular transducer I (1) is connected to the both ends of connecting rod I (3) by axle sleeve respectively, and roller II (7), angular transducer II (10) are respectively
The both ends of connecting rod II (8) are connected to by axle sleeve.
4. a kind of wire ga(u)ging equipment of cable product according to claim 1, it is characterised in that: the roller I
(4), roller II (7) is all made of troughing roller.
5. a kind of measurement method of the wire ga(u)ging equipment of any one of claim 1-4 cable product, it is characterised in that: packet
Include following steps:
Step 1: the cable product wire ga(u)ging equipment, measurement sensor I (1) axle center to sensor II (10) axis are installed
The vertical range H of the heart0；Measure the length a of connecting rod I (3), connecting rod II (8)；Measure the radius r of roller I (4), roller II (7)；
Step 2: cable product enters from incoming line (6)；
Step 3: if in cable production of articles detection process when non-jitter, in cable product wire ga(u)ging equipment roller I (4) and
Roller II (7) is contacted with cable product upper and lower surface respectively, at this time connecting rod I (3) and roller I (4) axle center place horizontal linear shape
At angle and connecting rod II (8) and roller II (7) axle center where the angle that is formed of horizontal linear be θ, angular transducer I (1)
The vertical range of horizontal linear where axle center and roller I (4) axle center and angular transducer II (10) axle center and roller II (7) axle center
The vertical range of place horizontal linear is h；II (21) measurement angle value θ of θ angular measurement room I (20) and θ angular measurement room；It is electric at this time
The value of cable diameter is d；
Step 4: if shake upward or downward in cable production of articles detection process, line footpath are thicker or when attenuating, roller I (4) and
Roller II (7) is subjected to displacement, and roller I (4) and roller II (7) drive angle sensor by connecting rod I (3) and connecting rod II (8) respectively
The rotation axis of device I (1) and angular transducer II (10) rotates, at this time connecting rod I (3) and roller I (4) axle center place horizontal linear shape
At angle be θ1, the angle that horizontal linear where connecting rod II (8) and roller II (7) axle center is formed is θ2；Angular transducer I (1)
The vertical range of horizontal linear where axle center and roller I (4) axle center is h1, angular transducer II (10) axle center and roller II (7)
The vertical range of horizontal linear where axle center is h2；θ angular measurement room I (20) and θ angular measurement room II (21) measure the angle after variation
Angle value θ1、θ2；The value of cable diameter is d ' at this time；
Step 5: cable product comes out from line outlet (5)；
Step 6: value d, the d ' of cable diameter are calculated according to geometrical relationship for PC (17) machine.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910039943.8A CN109855585B (en) | 2019-01-16 | 2019-01-16 | Cable product wire diameter measuring device and measuring method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910039943.8A CN109855585B (en) | 2019-01-16 | 2019-01-16 | Cable product wire diameter measuring device and measuring method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112161561A (en) * | 2020-08-20 | 2021-01-01 | 鞍钢集团北京研究院有限公司 | Steel wire rope diameter deviation measuring device and steel wire rope diameter deviation measuring method |
| CN113847858A (en) * | 2021-08-31 | 2021-12-28 | 中信重工机械股份有限公司 | Filter cake thickness measuring instrument of disc filter |
| CN116659442A (en) * | 2023-08-01 | 2023-08-29 | 国网浙江省电力有限公司舟山供电公司 | Cable diameter detector and working method thereof |
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| CN116659442A (en) * | 2023-08-01 | 2023-08-29 | 国网浙江省电力有限公司舟山供电公司 | Cable diameter detector and working method thereof |
| CN116659442B (en) * | 2023-08-01 | 2023-10-27 | 国网浙江省电力有限公司舟山供电公司 | Cable diameter detector and working method thereof |
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