AU5810194A - A control system for a machine for winding electrical cablesand the like, and a method of controlling the machine - Google Patents
A control system for a machine for winding electrical cablesand the like, and a method of controlling the machineInfo
- Publication number
- AU5810194A AU5810194A AU58101/94A AU5810194A AU5810194A AU 5810194 A AU5810194 A AU 5810194A AU 58101/94 A AU58101/94 A AU 58101/94A AU 5810194 A AU5810194 A AU 5810194A AU 5810194 A AU5810194 A AU 5810194A
- Authority
- AU
- Australia
- Prior art keywords
- reel
- cable
- relative
- characteristic point
- control system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H54/00—Winding, coiling, or depositing filamentary material
- B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
- B65H54/28—Traversing devices; Package-shaping arrangements
- B65H54/2848—Arrangements for aligned winding
- B65H54/2854—Detection or control of aligned winding or reversal
- B65H54/2869—Control of the rotating speed of the reel or the traversing speed for aligned winding
- B65H54/2875—Control of the rotating speed of the reel or the traversing speed for aligned winding by detecting or following the already wound material, e.g. contour following
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
Landscapes
- Engineering & Computer Science (AREA)
- Quality & Reliability (AREA)
- Winding Filamentary Materials (AREA)
- Control Of Electric Motors In General (AREA)
- Electric Cable Arrangement Between Relatively Moving Parts (AREA)
- Tension Adjustment In Filamentary Materials (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Electrophonic Musical Instruments (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The system comprises a laser light source (20) arranged so that it projects a line of light (L) which intersects the portion (C1) of the cable (C) between the cable guide (17) and the reel (8) near the point (Q) at which the cable (C) is deposited on the reel (8), and a processing and control system (30, 31) which is arranged: to determine the position of a characteristic point (P) of the intersection of the line of light (L) with the portion (C1) of the cable (C), relative to a first reference axis (x) parallel to the axis of the reel (8) and fixed to the cable guide (17); to calculate the velocity (VP) of the movement of the characteristic point (P) relative to the axis (x); to bring about a relative movement between the cable guide (17) and the reel (8) at a nominal velocity (VO) which depends upon the diameter (D) of the cable (C) and is proportional to the speed of rotation ( OMEGA ) of the reel (8) when the characteristic point (P) remains in a constant and predetermined reference position (xO) relative to the axis (x) and its velocity (VP) is substantially zero. <IMAGE>
Description
A CONTROL SYSTEM FOR A MACHINE FOR WINDING ELECTRICAL CABLES AND THE LIKE, AND A METHOD OF CONTROLLING THE MACHINE.
The present invention relates to machines for winding electrical cables and the like.
More specifically, the invention relates to a control system for an automatic winding machine of the type defined in the introductory part of the appended Claim 1.
In order to wind an electrical cable or the like onto the drum or core of a reel having end flanges, one end of the cable to be wound is fixed to the drum. The reel is then rotated about its own axis and a relative translatory motion between the reel and a cable guide is brought about in a direction parallel to the axis of rotation of the reel.
In practice, the perfect formation of adjacent turns on such a reel is hindered by a plurality of factors. The friction of the cable against the drum of the reel, against the underlying and adjacent turns, and against the end flanges may obstruct the running of the cable and give rise to uneven stratification of the turns.
Moreover, the interiors of electrical cables comprise stranded materials which, when they are pulled, tend to twist, imparting a rotation to the cable which can also upset the ordered and regular winding of the cable onto the reel.
Further causes of irregularities in the winding and stratification of the turns are connected with variations in the tension on the cable, the dimensional tolerances of the cable and of the reel, the fact that the flanges of the reel are not precisely parallel, and errors in the devices which control the reversal of the
- relative movement between the cable guide and the reel when the cable reaches the end flanges of the reel.
In order to carry out the winding correctly, the turns of a layer must be arranged side by side as evenly as possible so that the turns of the layer form as compact and uniform a surface as possible to constitute a good support for the next layer of turns. If this does not occur, during the winding of the next layer of turns, the cable may enter any spaces between turns of the preceding layer or be superposed on raised or σver-__ppi_ιg pαrticns of turns of tine preceding layer and may be peπranently deformed under the pressure of the successive layers of turns which may make it difficult subsequently to unwind the cable for use and/or may alter its internal characteristics, possibly compromising its functional characteristics.
When, in the course of the formation of a layer of turns, the cable approaches an end flange of the reel, it must not be jammed between the flange and the last turn wound. If this occurs, it may be difficult subsequently to unwind the cable from the reel for use and the structural and functional characteristics of the cable may be compromised.
In some cases, the inner face of an end flange of each reel onto which the electrical cables are wound has a so-called spiral in which the first turn is wound so that the end of the cable wound on the reel is accessible from the exterior. With these reels, the turns after the first turn have to be wound on the drum or core of the reel in the space between the spiral on one end flange and the other flange. During the formation of subsequent layers of turns the end turn of
each layer which faces the spiral must not fall into the space surrounding the spiral since, if this occurs deformations and stretching may occur which could damage the cable.
Various automatic winding machines with artificial vision control systems have been proposed for winding electrical cables or the like onto reels automatically.
European patent application EP-A-0 129 926 describes a winding machine in which a luminous panel is disposed on one side of the reel and a television camera on the opposite side picks up the silhouette of a portion of the winding in the region of the step formed between the layer of turns being formed and the underlying layer at the point at which the cable is deposited on or supplied to the reel. The television camera is fixed to the cable guide on the axis (the axis x) of the relative motion between the cable guide and the reel and is movable relative to the cable guide in a direction (the axis y) perpendicular to that axis. A microprocessor system analyzes the silhouette of the portion of the winding framed and determines the position of a characteristic point belonging to the turn of the preceding layer onto which the turn being formed is to be deposited. If the position of the characteristic point is displaced from a predetermined position, the control system acts on the motor which controls the relative motion between the cable guide and the reel in order to return the characteristic point to an assigned position. This control is thus based on the indirect observation and the correction of the position of the turn which is being deposited.
European patent EP-B-0 043 368 describes an automatic
winding machine with an artificial vision system comprising an illuminator which projects a light beam onto the reel and a television camera which picks up a portion of the light beam in the region of the last turn wound and, in particular, in the region of the step formed between the layer of turns being formed and the underlying layer. In this machine, the light beam is projected onto the reel and observed by the television camera at an angular position which is markedly offset from the region in which the cable is deposited on or supplied to the reel. According to this patent, the position of the turn being deposited is detected and the relative movement between the cable guide and the reel is regulated so that the angle at which the cable is supplied to the reel is kept precisely and permanently equal to a predetermined constant value.
English patent GB-B-2 221 227 (Ceat Cavi) describes a winding machine according to the introductory part of the appended Claim 1, having a vision system comprising a laser source which projects onto the reel a light beam which intersects the turns at the point at which the cable is supplied to or deposited on the reel.
In this machine, the processing and control system associated with the vision system also analyzes the image picked up and determines the position of the point at which the cable is deposited within a reference system and regulates the relative motion between the cable guide and the reel on the basis of the deviation detected between the observed position of the deposition point and an assigned position.
In this winding machine, as in that described in
European application EP-A-0 129 926, the control system intervenes to modify the relative motion between the cable guide and the reel only after it has detected that the point at which the cable is supplied to the reel has moved, that is, after the turn being deposited has already overlapped or become separated from the preceding turn.
The correction of the relative motion thus achieved serves to prevent the winding from continuing incorrectly but the winding defect v/hich has already occurred cannot be eliminated.
An object of the present invention is to provide an automatic winding machine of the type specified above, in which the control of the relative motion between the cable guide and the reel can prevent the formation of winding defects.
According to the invention, this object is achieved by means of a control system for a winding machine, the main characteristics of which are defined in the appended Claim 1.
A further subject of the invention is a method of winding a cable or the like evenly onto a reel in a winding machine, the characteristics of which are defined in the appended Claims 9 to 16.
Further characteristics and advantages of the invention will become clear from the detailed description which follows with reference to the appended drawings, provided purely by way of non-limiting example. In the drawings:
Figures 1 and 2 are a front view and a side view, respectively, of a winding machine having a control system according to the invention,
Figures 3 and 4 are a sectioned side view and a front view, respectively, of a reel during the winding of the electrical cable coming from a cable guide; Figure 4 also shows a perpendicular cartesian reference frame x, y fixed to the cable guide,'
Figure 5 is a block diagram of an artificial vision and control system included in the winding machine according to the invention,
Figure 6 is a series of three graphs showing examples of curves of quantities monitored during the operation of the winding machine, as functions of time shown on the abscissa, and
Figure 7 is a perspective view of a reel with a spiral for the deposition of the first turn of the winding on an end flange.
With reference to Figures 1 and 2, in the embodiment illustrated, a winding machine (of known type) comprises a stationary support structure, generally indicated 1. The structure comprises two parallel vertical uprights 2 which have respective feet 2a at their lower ends for bearing on the floor or ground T and are interconnected at their tops by a pair of parallel cross-members 3 and 4.
A reel-holding carriage, generally indicated 5, is movable along the cross-members or guides 3 and 4. The carriage comprises, essentially, two parallel
vertical arms 6 and 7, between the lower ends of which a reel 8 is supported rotatably for the winding of a cable or the like.
The arms 6 and 7 have respective wheels or rollers 6a and 7a (Figures 1 and 2) which can run on the cross-members 3 and 4 of the supporting structure 1 in a guided manner. The arms 6 and 7 are connected to respective internally-threaded sleeves 10 through which the ends of a worm screw 11 extend (Figure 1) , the worm screw being arranged horizontally and being rotatable as a result of the operation of an associated electric motor 12. The arrangement is such that the operation of the motor 12 in one sense of rotation and in the opposite sense can move the arms 6 and 7 of the carriage 5 apart or towards each other, respectively, to enable a reel 8 to be loaded between their lower ends or to be removed therefrom.
During the normal operation of the machine, the motor 12 is de-activated and moves along the supporting structure 1 together with the arms 6 and 7.
A capstan 13 is disposed on the carriage 5 above the electric motor 12 (Figure 1) and a cable 12a , for example, of steel, the ends of which are connected to opposite ends of the stationary support structure 1, is wound thereon.
The capstan 13 is associated with an electric motor 14 which can rotate it in a controlled manner in one sense or the other in order correspondingly to move the carriage 5 to and fro along the cross-members or guides 3 and 4 of the support structure 1.
A further electric motor 15 for rotating the reel 8 is carried by the lower end of the vertical arm 6 of the carriage 5.
An angular-velocity sensor 16 such as a tachometric dynamo or a rotary encoder is associated with the end of the other arm 7 of the carriage 5.
As can better be seen in Figure 2, a cable guide, of known type, generally indicated 17, is fixed to the support structure 1. In particular, the cable guide comprises two output guide rollers, indicated 18 in Figures 1 to 3, between which the cable C to be wound onto the reel 8 extends.
The winding machine shown in Figures 1 and 2 is thus of the type in which the cable guide is fixed and the reel 8 is movable parallel to its axis, relative to the cable guide.
However, as will become clearer from the following, the invention is not limited to this type of arrangement but can also be put into effect in winding machines in which the cable guide is moved parallel to the axis of rotation of the reel.
A laser light source, indicated 20, is carried in a fixed position by the support structure 1. The source directs a laser beam towards the reel 8. The beam is indicated B in Figures 2 and 3. The source 20 has associated optical beam-spreader means by means of which a wide, -thin U tbeam is projected onto the reel 8 and can illuminate the reel 8 and the cable C wound thereon longitudinally from one flange 8a to the other flange 8b throughout the travel of the reel 8 along the
guide cross-members of the support structure 1.
In Figure 4, the line of light projected onto the end flanges of the reel and onto the cable already wound thereon is indicated L.
As can be seen in Figures 2 to 4, the source 20 is arranged in a manner such that the line of light L projected onto the reel 8 intersects the portion Cl of the cable C which is between the cable guide 17 and the reel 8 near the point Q at which the cable C is deposited on or supplied to the reel.
As is shown in Figure 3, the arrangement of the source 20 is such that the beam B intersects the portion Cl of the cable near the point Q at which the cable is deposited on the reel 8 throughout the winding of the cable, that is, for every layer of turns formed on the reel, starting from the innermost layer, shown in continuous outline, and up to the outermost layer, shown in broken outline.
A televisioncamera2L (Figures 2 and 5)which, conveniently, has an interference filter, is fixed on the support structure 1 in a position adjacent and offset from the laser source 20. The television camera 21 is arranged and oriented in a manner such that it frames the line of light L projected onto the reel, onto the cable already wound thereon, and onto the portion Cl of the cable supplied to the reel.
As shown in Figure 5, the television camera 21 is connected to a processing and control system, generally indicated 30, including image-signal processing devices which are arranged to analyze the signals supplied by
the television camera. On the basis of the analysis of the signals, as will be seen, the processing and control system 30 monitors, in particular, the region in which the cable is supplied to or deposited on the reel and, by means of interface circuits 31, regulates the speed of the electric motor 14 which brings about the translatory motion of the reel 8 relative to the cable guide 17.
The sensor 16 is also connected to the processing and control system and supplies it with signals indicative of the speed of rotation of the reel.
Conveniently, the processing and control system 30 is formed with multiple-processor architecture, for example, in the manner described in detail in GB-B-2 221 227.
The hardware of the processing and control system 30 is equipped with a set of software programmes for processing the image signals by known techniques and algorithms including connectivity analysis, analysis of the greyness levels, and the detection of edges and other geometrical characteristics. In particular, the system is arranged to detect and describe the shape of the line L of light which is projected by the source 20 onto the reel and onto the cable in terms of cartesian co-ordinates within a reference frame x, y which is fixed to the television camera 21 and hence to the cable guide 17. The reference frame is shown schematically in Figure 4 and comprises an x axis parallel to the axis of rotation of the reel (and hence to the direction of the relative movement between the reel and the cable guide) and a y axis perpendicular thereto.
The processing and control system 30 is arranged, in particular, to determine, within the reference frame x, y, the co-ordinates of a characteristic point, indicated P in Figures 3 and 4, of the intersection of the light line L with the portion Cl of the cable C, near the point at which the cable is supplied to or deposited on the reel. In particular, the characteristic point may be (for example) the central point of the arc which represents the intersection of the light line L with the portion Cl of the cable C.
If the cable C has a diameter D and the speed of rotation of the reel 8 is -∑""_- (radians/second) , and provided that there is a minimum space o between adjacent turns in each layer of the winding formed on the reel, (to take account of the dimensional tolerances of the cable) , in operation, the entry point of the cable moves along the reel 8 (that is, parallel to the axis of rotation of the reel) at a velocity
VQ = (D + <5 ) . Λ /2 TT
The processing and control system 30 controls the motor 14 in a manner such that the relative trans.atia ofthe reel 8 withre-φectto the cable guide 17 normally takes place at the velocity V* 0.
The co-ordinate xp of the point P relative to the reference system x, y fixed to the cable guide 17 must therefore remain permanently constant and equal to a value indicated xQ in Figure 4.
Conveniently, the value xQ assigned to the point P on the abscissa in the reference frame x, y fixed to the cable guide is different for each layer of turns formed
on the reel 8 and can be determined experimentally beforehand, on the basis of the type and diameter of the cable, and stored in the processing and control system 30.
During the formation of a layer of turns, the processing and control system 30 determines the position xp(t) and the velocity dx_/dt = Vp(t) of the characteristic point P.
On the basis of the data for the velocity of the point P relative to the axis x fixed to the cable guide, the processing and control system 30 can detect a tendency of the co-ordinate xp of the point P to deviate from its assigned value Q and can predict the magnitude of the deviation.
Due to the tolerances of the diameter and the surface irregularities of the cable, the instantaneous velocity of the point P relative to the axis x may be subject to appreciable variations. The processing and control system 30 is therefore conveniently arranged to consider, as the velocity of the point P relative to the axis x, a value obtained from a variable average calculated from a series of instantaneous values.
Naturally, if the cable is wound onto the reel evenly, the average velocity of the point P relative to the axis x is equal to zero.
If the average velocity Vp of the point P detected tends to be other than zero, and hence positive or negative, the processing and control system pilots the electric motor 14 in a manner such as to modify the velocity of the relative translation of the reel 8 with respect to the
cable guide 17 in the manner which will now be described with reference to Figure 6.
In this drawing, the upper graph shows an example of a curve of the velocity Vp of the point P relative to the axis x, as a function of time t shown on the abscissa. The middle graph shows a corresponding curve of the velocity V_τ of-the relative translatic- ofthereel 8 relative to the cable guide 17 correspondingly imposed by the processing and control system 30 by means of the electric motor 14 controlled thereby.
As the graphs of Figure 6 show, as long as the velocity Vp of the point P is equal to zero or, in any case, is below a threshold Δ V, the, processing and control system 30 keeps the velocity V„_, of the relative translation at thevalue V' indicated above.
If the speed V of the point P exceeds the threshold A V (at the time t. in the graphs of Figure 6) , the processing and control system 30 reduces the velocity V__ of the relative translation from the value V . This reduction may, for example, be carried out with an initial downward slope (as shown between the times t, and t2 in the middle graph of Figure 6) followed by a constant reduction (as shown after the time t~) .
The velocity VRT of the relative translation is reduced for as long as the velocity Vp of the point P is substantially equal in magnitude to the variation imposed on the velocity of the relative translation, as shown at the time t, in Figure 6.
From the time at which the velocity of the point P started to increase from its assigned value of zero and
up to the time t,, the co-ordinate xp of the point P is slightly greater than its assigned value 0, as shown by the lower graph of Figure 6.
At the time t3, the processing and control system causes a very rapid (theoretically instantaneous) change in the velocity oftherelative translaticnof -the reel relative to the cable guide 17 so that the co-ordinate Xp of the point P returns (theoretically instantaneously) to its assigned value x0.
At this point the correction is completed.
At the start of the winding of the cable on the reel, the first turns are usually formed manually. In this condition, the processing and control system 30 is de-activated. After the first turn or turns have been formed, the reel 8 is brought, by the manual operation of the electric motor 14, to a position relative to the cable guide 17 in which the co-ordinate xp of the point P is round about its assigned value xQ.
The automatic processing and control system 30 is then activated and causes the reel 8 to move relative to the cable guide 17 by the distance necessary to make the co-ordinate xp of the point P coincide with its assigned value xQ. Naturally, at this stage, the processing and control system does not take account of the velocity Vp of the point P relative to the axis x.
As stated above, the value xn assigned to the co-ordinate xp of the point P is different for each layer of turns wound onto the reel. In fact, as can be seen, for example, from Figure 4, the turns of one layer are generally offset from those of the underlying
layer .
The abscissa values assigned to the point P can be predetermined experimentally and stored in the processing and control system,- or may be calculated by the system on the basis of the diameter D of the cable, the distance between the cable guide and the point at which the cable enters the reel, the helix angle {*> of the winding (Figure 4) , and the diameter D_ of the layer.
The diameter of the layer may be calculated on the basis of the average of the co-ordinates on the axis y of homologous characteristic points of the intersections of the light line L with turns already deposited in the layer.
The helix angle P of the winding may be derived from the pitch of the helix which in turn can be derived by averaging the co-ordinates on the axis x of homologous characteristic points of the intersections of the light line L with turns already deposited.
When a layer of turns on the reel is completed and the deposition point of the cable is in correspondence with an end flange, the processing and control system 30 can detect the formation of the first turn of the next layer on the basis of the detection of the co-ordinates cf the characteristic point P on the axes x and y.
As regards the reversal oftherelative translatic- of-the reel withrespectto -the cable guide 17 in order to form a new layer of turns, the processing and control system may conveniently also be arranged to control the reversal in the following manner.
In the course of the formation of a layer of turns, the processing and control system 30 determines the distance between the characteristic point P and the end flange of the reel towards which the point is moving. This is possible because the light line L also intersects the flange.
When the distance between the characteristic point P and the flange decreases to a predetermined value, the control system brings about a controlled reduction in the velocity ofthe relative translatLct of "the reel 8 with respect to the cable guide 17. This involves an increase in the angle ^χ_ at which the cable C is supplied to the reel, until the cable C is made to overlap the last turn deposited in order thus to form the first turn of the next layer. This enables the first turn of the next layer to be formed even without the cable striking the end flange of the reel.
After the formation of the first turn of the new layer has been detected, the control system 30 causes a rapid and controlled movement of the reel 8 relative to the cable guide 17 so as to cause the supply angle X'_ of the cable C to assume a predetermined value with the opposite sign to its previous value. The deposition of the subsequent turns of the new layer is then controlled in the manner described above, naturally with the reel 8 trarislatirig relative to the cable guide in the opposite direction to that in which it moved previously.
The fact that the cable can be made to overlap the last turn deposited in order to start the formation of a new layer of turns without the cable C necessarily being brought into interaction with the end flange of the
reel is of particular interest when the reel has a spiral on the inner face of an end flange for enabling a first turn to be formed in a manner such that the input end of the cable is in any case accessible from the exterior once the winding is completed.
Such a reel is shown in Figure 7. The inner face of the end flange 8a of the reel shown in this drawing has a projection 40 with a scroll-like or spiral external profile on which the input end C0 of the cable C is positioned. Starting from the end CQ, the cable follows the external profile of the projection^wfaichis radiallyspaced from the axis of the reel by a progressively decreasing distance and, after it has completed a turn around this axis, at the point C2,itisbent and passes onto the core or drum 8c of the reel to form the first turn of the first layer of the winding. The subsequent turns are formed on the core or drum 8c until the flange 8b is reached. The next layer of turns is wound onto the preceding layer from the flange 8b towards the projection 40 on the other flange 8a. The various layers of turns must be confined between the inner face of the flange 8b and the plane of the surface of the projection 40 which faces the flange 8b. In other words, when new layers of turns are started near the projection 40 of the flange 8a, it is important that the cable does not enter the space between the plane of the inner face of the flange 8a and the face of the projection 40 which faces the flange 8b.
Ihe central techniquedescribed above for reversing the winding prevents this problem which might otherwise cause deformations and stretching which could damage the cable.
Naturally, the principle of the invention remaining the same, the forms of embodiment and details of construction may be varied widely with respect to those described and illustrated purely by way of non-limiting example, without thereby departing from the scope of the present invention.
Claims (16)
1. A control system for a machine for winding electrical cables (C) and the like comprising
- support means (1, 5) for receiving and rotatably supporting a reel (8) with end flanges (8a, 8b) ,
- a cable guide (17) ,
- first drive means (15) for rotating the reel (8),
- second drive means (14) for bringing about a relative movement between the cable guide (17) and the reel (8) , parallel to the axis of rotation of the reel (8) , in operation;
the control system comprising
sensor means (16) for monitoring the speed of rotation of the reel (8) ,
- a laser source (20) for illuminating the reel (8) from one end flange to the other (8a, 8b) so as to project a line of light (L) onto the turns wound onto the reel (8) ,
- at least one television camera (21) which is fixed to the cable guide (17) and can frame the portion of the reel (8) which is illuminated by the source (20) , and
- a processing and control system (30, 31) which is connected to the sensor means (16) for monitoring the speed of rotation of the reel (8) , and to the television camera (21) , and includes image-signal processing means (30) which are arranged to analyze the signals supplied by the at least one television camera (21) , the processing and control system (30, 31) being arranged to pilot the first and second drive means (15, 14) in a predetermined manner in dependence on the results of the analysis of the signals supplied by the at least one television camera (21) ;
the control system being characterized in that the source (20) is arranged in a manner such that the line of light (L) projected intersects the portion (C. ) of the cable (C) which is between the cable guide (17) and the reel (8) , near the point (Q) at which the cable (C) is deposited on the reel (8) , and in that the processing and control system ,(30, 31) is arranged:
- to determine the position of a characteristic point (P) of the intersection of the line of light (L) with the portion (Cl) of the cable (C) , relative to a first reference axis (x) parallel to the axis of the reel (8) and fixed to the cable guide (17) ',
- to calculate the velocity (Vp) of the movement of the characteristic point (P) relative to the axis (x) ,'
- to control the second drive means (14) so as to bring about a relative movement between the cable guide (17) and the reel (8) at a nominal velocity (V0) which depends upon the diameter (D) of the cable (C) and is proportional to the speed of rotation (-Ω.) of the reel
(8) , when the characteristic point (P) remains in a constant and predetermined reference position (x ) relative to the axis (x) and its velocity (Vp) is substantially zero.
2. A control system according to Claim 1, characterized in that the processing and control system (30, 31) is also arranged to bring about a variation in the relative velocity (VRT) between the cable guide (17) and the reel (8) when the velocity (Vp) of the characteristic point (P) relative to the axis (x) exceeds a predetermined threshold ( ^ V) , the variation having the opposite sign to the velocity (V ) of the characteristic point (P) and being brought about for as long as the velocity (Vp) of the characteristic point (P) is substantially equal in magnitude to the variation imposed on the relative velocity (V RT) between the cable guide (17) and the reel (8) , and then to return the relative velocity (V τ) between the cable guide (17) and the reel (8), rapidly to the nominal value (VQ) and subsequently to bring about a rapid relative translaticn between the cable guide (17) and the reel (8) so as to return the characteristic point (P) to the reference position (x_) relative to the axis (x).
3. A control system according to Claim 2 , characterized in that the processing and control system (30, 31) is arranged to compare the instantaneous position (xp) of the characteristic point (P) with a different constant reference position (x ) for each layer of turns wound onto the reel (8) .
4. A control system according to Claim 3, characterised in that the processing and control system (30, 31) is arranged to compare the instantaneous position (xp) of the characteristic point (P) with a constant reference position (xQ) which is tabulated and stored for each layer according to the characteristics of the cable (C) , particularly its diameter (D) .
5. A control system according to any one of the preceding claims, characterized in that the processing and control system (30, 31) is also arranged
to determine the co-ordinate (Y ) of the characteristic point (P) relative to a second reference axis (y) perpendicular to the first (x) , and
- to detect the formation of the first turn of a new layer of turns on the basis of the observation of the variations of the co-ordinates of the characteristic point (P) relative to the first and second axes (x, y) .
6. A control system according to Claims 3 and 5, characterized in that the processing and control system (30, 31) is arranged to determine the co-ordinates relative to the second reference axis (y) of homologous characteristic points of the intersections of the light line (L) with turns of the winding layer which is being deposited and to calculate the diameter of the layer on the basis of the co-ordinates.
7. A control system according to any one of the preceding claims, characterized in that the processing and control system (30, 31) is also arranged
- to determine the distance between the characteristic point (P) and the end flange (8a, 8b) of the reel (8) ,' and
- to bring about a controlled reduction in the relative velocity between the cable guide (17) and the reel (8) when the distance between the characteristic point (P) and a flange (8a, 8b) decreases to a predetermined value, so as to increase the angle (OC ) at which the cable (C) is supplied to the reel (8) until the cable (C) is caused to overlap the last turn of the preceding layer in order to form the first turn of the next layer.
8. A control system according to Claims 5 and 7, characterized in that the processing and control system (30, 31) is also arranged, after it has detected the formation of the first turn of a new layer, to cause a rapid and controlled relative movement between the reel (8) and the cable guide (17) so as to cause the angle (oc ) at which the cable (C) is supplied to the reel (8) to assume a predetermined value with the opposite sign to its previous value.
9. A method of forming a regular winding of an electrical cable (C) or the like on a reel (8) in a winding machine (1) which comprises support means (1) for receiving and rotatably supporting a reel (8) with end flanges (8a, 8b) and which has drive means (14, 15) for rotating the reel (8) arid translating it relative to a cable guide (17) , parallel to the axis of rotation of the reel (8) ,*
the method comprising the steps of:
- projecting a line of light (L) from one end flange (8a) of the reel (8) to the other C8b) ina manner such that the line of light (L) extends over the turns wound onto the reel (8) ,
- framing the portion of the reel (8) on which the line of light (L) extends with at least one television camera (21) fixed to the cable guide (17) in order to generate corresponding image signals, - processing and analyzing the image signals,
- piloting the drive means (14, 15) in a predetermined manner in dependence on the results of the analysis of the image signals;
the method being characterized in that the line of light (L) is projected in a manner such that it intersects the portion (Cl) of the cable (C) which extends between the cable guide (17) and the reel (8) near the point (Q) at which the cable (C) is deposited on the reel (8) , and in that it also comprises the steps of:
- determining the position of a characteristic point (P) of the intersection of the line of light (L) with the portion (Cl) of the cable (C) , relative to a first reference axis (x) parallel to the axis of the reel (8) and fixed to the cable guide (17) ;
- calculating the velocity of the movement (V ) of the characteristic point (P) relative to the axis (x) ,'
- controlling the second drive means (14) so as to bring about a relative movement between the cable guide (17) and the reel (8) at a nominal velocity (V_) which depends upon the diameter (D) of the cable (C) and is proportional to the speed of rotation (-Ω.) of the reel (8) when the characteristic point (P) remains in a constant and predetermined reference position (x_) relative to the axis (x) and its velocity (Vp) is substantially zero.
10. A method according to Claim 9, also characterized by the steps of - bring about a variation in the relative velocity (VRr-,) between the cable guide (17) and the reel (8) when the velocity (V ) of the characteristic point (P) relative to the axis (x) exceeds a predetermined threshold ( Δ v) , the variation having the opposite sign to the velocity (V ) of the characteristic point (P) and being brought about for as long as the velocity (Vp) of the characteristic point (P) is substantially equal in magnitude to the variation imposed on the relative velocity (V RT) between the cable guide (17) and the reel (8) , and then to bring about a rapid return of the relative velocity (Vprp) to the nominal value (V ) and subsequently to bring about a rapid relative translaticri between the cable guide (17) and the reel (8) so as to return the .characteristic point (P) to the reference position (x_) relative to the axis (x) .
11. A method according to Claim 10, characterized in that the instantaneous position (xp) of the characteristic point (P) is compared with a different constant reference position (x_) for each layer of turns wound onto the reel (8) .
12. A method according to Claim 11, characterized in that the reference position (x_) for the characteristic point (P) is tabulated and stored for each layer, according to the characteristics of the cable (C) , particularly its diameter (D) .
13. A method according to one of Claims 9 to 12, characterized in that the co-ordinate (yp) of the characteristic point (P) relative to a second reference axis (y) perpendicular to the first axis (x) is detected and in that the formation of the first turn of a new winding layer is detected on the basis of the observation of the co-ordinates (xp, yp) of the characteristic point (P) .
14. A method according to Claims 11 and 12, in which the co-ordinates, relative to the second reference axis (y) , of homologous characteristic points of the intersection of the line of light (L) with the turns of the winding layer which is being deposited, are determined and the diameter of the layer is calculated on the basis of these co-ordinates.
15. A method according to one of Claims 9 to 14, in which the distance between the characteristic point (P) and the end flanges (8a, 8b) of the reel (8) is determined and in which a controlled reduction in the relativevelocityof-the reel (8)with respect to the cable guide (17) is brought about when the distance between the characteristic point (P) and a flange decreases to a predetermined value so as to increase the angle (σ ) at which the cable (C) is supplied to the reel (8) until the cable (C) is caused to overlap the last turn of the preceding layer in order to form the first turn of the next layer.
16. A method according to Claims 13 and 15, characterized in that, after the formation of the first turn of a new layer has been detected, a rapid movement of the reel (8) relative to the cable guide (17) is brought about so as to cause the angle (o ) at which the cable (C) is supplied to the reel (8) to assume a predetermined value with the opposite sign to its previous value.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITTO92A0999 | 1992-12-14 | ||
| ITTO920999A IT1257931B (en) | 1992-12-14 | 1992-12-14 | CONTROL SYSTEM FOR A WINDING MACHINE FOR ELECTRIC AND SIMILAR CABLES, INCLUDING AN ARTIFICIAL VISION SYSTEM FOR THE CONTROL OF THE STRATIFICATION OF THE COILS, AND PROCEDURE FOR THE CONTROL OF SUCH MACHINE |
| PCT/EP1993/003515 WO1994013568A1 (en) | 1992-12-14 | 1993-12-13 | A control system for a machine for winding electrical cables and the like, and a method of controlling the machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU5810194A true AU5810194A (en) | 1994-07-04 |
| AU675489B2 AU675489B2 (en) | 1997-02-06 |
Family
ID=11410914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU58101/94A Ceased AU675489B2 (en) | 1992-12-14 | 1993-12-13 | A control system for a machine for winding electrical cablesand the like, and a method of controlling the machine |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP0602504B1 (en) |
| CN (1) | CN1097176A (en) |
| AT (1) | ATE162999T1 (en) |
| AU (1) | AU675489B2 (en) |
| DE (1) | DE69316859T2 (en) |
| FI (1) | FI102267B (en) |
| IT (1) | IT1257931B (en) |
| MY (1) | MY109884A (en) |
| NZ (1) | NZ259328A (en) |
| WO (1) | WO1994013568A1 (en) |
Families Citing this family (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19726285A1 (en) | 1997-06-20 | 1998-12-24 | Siemens Ag | Method and device for winding strand-like material to be wound onto a spool |
| US6247664B1 (en) * | 1999-06-25 | 2001-06-19 | Siecor Operations, Llc | Reel monitor devices and methods of using the same |
| DE102006018428B8 (en) * | 2006-04-20 | 2015-12-17 | Maschinenfabrik Niehoff Gmbh & Co. Kg | Method and device for laying elongated winding material |
| WO2009047719A2 (en) * | 2007-10-11 | 2009-04-16 | Herbert Schmitz | A method, apparatus and system for monitoring the winding of rope about a drum |
| ITTO20110550A1 (en) * | 2011-06-23 | 2012-12-24 | Cometo S N C | STRATIFICATOR FOR WINDING MACHINE |
| US9302872B2 (en) | 2013-07-30 | 2016-04-05 | Kimberly-Clark Worldwide, Inc. | Diameter measurement of a roll of material in a winding system |
| CN106030045B (en) * | 2014-02-25 | 2017-10-03 | 西门子公司 | Turbine annular segment with the wearing layer with compound angle, asymmetric surface area density ridge and groove pattern |
| CN104076706B (en) * | 2014-06-27 | 2016-08-10 | 中国电子科技集团公司第八研究所 | The automatic solid matter control system of optical fiber based on image recognition technology |
| ITUB20154968A1 (en) * | 2015-10-16 | 2017-04-16 | Danieli Automation Spa | MANAGEMENT DEVICE FOR COILER EQUIPMENT AND ITS METHOD |
| CN105384003A (en) * | 2015-11-23 | 2016-03-09 | 中国电子科技集团公司第八研究所 | Novel automatic deviation correction and cable arranging system based on industrial camera visual image processing |
| JP6672574B2 (en) * | 2016-05-19 | 2020-03-25 | 住友電工ウインテック株式会社 | Winding device and winding method |
| US10207890B2 (en) * | 2017-05-19 | 2019-02-19 | Reelex Packaging Solutions, Inc. | Apparatus and method for winding coil |
| CN108689240B (en) * | 2018-04-10 | 2020-06-16 | 烟台大学 | High-precision tension adjustable wiring device capable of effectively reducing sliding friction |
| NO344472B1 (en) * | 2018-07-10 | 2020-01-13 | Stimline As | A winding apparatus |
| DE102018117687A1 (en) | 2018-07-21 | 2020-01-23 | Dr. Brandt Gmbh | Device and method for optically monitoring the arrangement of at least one traction device and use |
| CN108792808B (en) * | 2018-07-27 | 2024-05-14 | 上海科辰光电线缆设备有限公司 | Automatic precise winding and arranging equipment and method |
| EP3831754B1 (en) * | 2018-07-31 | 2023-08-30 | Furukawa Electric Co., Ltd. | Wire aligning and winding device and learning system used for same |
| CN110316612A (en) * | 2018-11-20 | 2019-10-11 | 海南中坚实业有限公司 | A kind of electric wire automation production flow line technique improved efficiency |
| KR102545910B1 (en) * | 2021-07-09 | 2023-06-21 | 주식회사 씨맥 | An apparatus for arraying and winding automatically the cable for easy error correction |
| CN114803681B (en) * | 2022-04-12 | 2023-06-02 | 江南大学 | Self-adaptive wire arranging equipment and method based on automatic wire feeding |
| CN114920076B (en) * | 2022-06-28 | 2023-08-22 | 国网山东省电力公司东营市东营区供电公司 | Dedicated cable winding equipment is erect in construction of electric power transmission cable |
| CN115085094B (en) * | 2022-08-18 | 2022-11-22 | 广东威恒输变电工程有限公司 | Data processing method for controlling cable laying |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH653654A5 (en) * | 1983-06-24 | 1986-01-15 | Maillefer Sa | DEVICE FOR AUTOMATICALLY CONTROLLING A SLICING OPERATION. |
| US4838500A (en) * | 1987-06-18 | 1989-06-13 | United States Of America As Represented By The Secretary Of The Army | Process and apparatus for controlling winding angle |
| IT1219381B (en) * | 1988-06-16 | 1990-05-11 | Ceat Cavi Spa | AUTOMATIC WINDING MACHINE FOR ELECTRIC AND SIMILAR CABLES INCLUDING AN ARTIFICIAL VISION SYSTEM FOR THE CONTROL OF THE STRATIFICATION OF THE COILS AND CONTROL PROCEDURE FOR SUCH MACHINE |
-
1992
- 1992-12-14 IT ITTO920999A patent/IT1257931B/en active IP Right Grant
-
1993
- 1993-12-07 AT AT93119674T patent/ATE162999T1/en not_active IP Right Cessation
- 1993-12-07 EP EP93119674A patent/EP0602504B1/en not_active Expired - Lifetime
- 1993-12-07 DE DE69316859T patent/DE69316859T2/en not_active Expired - Fee Related
- 1993-12-13 CN CN93112653.3A patent/CN1097176A/en active Pending
- 1993-12-13 AU AU58101/94A patent/AU675489B2/en not_active Ceased
- 1993-12-13 NZ NZ259328A patent/NZ259328A/en unknown
- 1993-12-13 WO PCT/EP1993/003515 patent/WO1994013568A1/en active Application Filing
- 1993-12-13 FI FI935576A patent/FI102267B/en active
- 1993-12-14 MY MYPI93002707A patent/MY109884A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FI935576A (en) | 1994-06-15 |
| ATE162999T1 (en) | 1998-02-15 |
| AU675489B2 (en) | 1997-02-06 |
| CN1097176A (en) | 1995-01-11 |
| FI935576A0 (en) | 1993-12-13 |
| ITTO920999A1 (en) | 1994-06-14 |
| IT1257931B (en) | 1996-02-19 |
| EP0602504A1 (en) | 1994-06-22 |
| NZ259328A (en) | 1996-05-28 |
| DE69316859D1 (en) | 1998-03-12 |
| WO1994013568A1 (en) | 1994-06-23 |
| ITTO920999A0 (en) | 1992-12-14 |
| FI102267B1 (en) | 1998-11-13 |
| MY109884A (en) | 1997-09-30 |
| FI102267B (en) | 1998-11-13 |
| EP0602504B1 (en) | 1998-02-04 |
| DE69316859T2 (en) | 1998-09-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MK14 | Patent ceased section 143(a) (annual fees not paid) or expired |