EP0335080A2 - Method and apparatus for determining the size of cross-wound packages and for utilising the results - Google Patents

Abstract

Sensors detect the growth of the cross-wound bobbin. In the first place, a spooling-station computer deduces from the measured values the bobbin circumference or bobbin radius y1 to y6 by conversion at the times x1 to x6. From these highly dispersed intermediate values, the spooling-station computer or a central computer, to which the spooling-station computer or computers are connected, calculates a compensating function y = f (x) which reflects the current bobbin circumference or bobbin radius from which random spooling events have been removed. The current bobbin circumference or bobbin radius thus determined is, if appropriate, fed back to the spooling-station computer and there triggers activities, such as, for example, influence on the spooling operation, determination of the yarn length and/or conclusion of the spooling operation. The result is a qualitatively better monitoring of the spooling operation and/or an improved bobbin quality as a result of a regulating influence on the spooling operation itself and as a result of a reproducible accurate determination of the yarn length or bobbin diameter. …<IMAGE>…

Description

The invention relates to methods and apparatus for determining the bobbin circumference of cross-wound bobbins on a textile machine producing cross-wound bobbins and for evaluating the result, in which measured values which are produced by the growth of the cross-wound bobbin and which are evaluated appropriately are used to determine the extent of the cross-wound bobbin or the length of thread wound on the package is closed.

A "diameter adjustment" is known on automatic winding machines, which enables the user to produce bobbins with certain final diameters. The requirements for this facility are:
- Exact measuring method of the bobbin diameter at the respective winding point,
- measurement method independent of winding parameters,
- Good reproducibility of the diameter setting.

A simple way to measure the diameter of a package is to measure the frame angle. The coil diameter can then be calculated using the cosine theorem, since the frame geometry remains the same. This measuring method also has the advantage of being independent of winding parameters.

However, the disadvantages of the method are serious. Since the change in angle during a winding cycle is only a few degrees, only technically complex angle encoders achieve the required diameter accuracy due to the small working angle.

In addition, due to the constant vibration of the coil frame and thus the constant change of the coil frame angle, an angle encoder must be used that works without wear. Angle encoders that have these properties are expensive. The cost of winding unit hardware that is required for the transmission of the measured angle of rotation to the winding unit computer must be added to these costs.

Another possibility for determining the coil diameter is to measure the period duration ratio of a coil revolution to a drive drum revolution. With the additional condition that the circumferential speeds of drum and spool are the same, this ratio multiplied by the drum diameter gives the current spool diameter.

The advantages of this method are the simple implementation options and the low costs. With conical packages, it is not the outer diameter that is determined, but the driven diameter.

The procedure is inaccurate and it is dependent on the set winding parameters, e.g. B. thread tension, weight, drum type, etc., depending.

The invention has for its object to improve the quality of the package production.

According to the invention, this object is achieved in that the measured values representing the growth of the package are continuously recorded and in at least one computer for further The evaluation is processed and, if necessary, saved so that when further evaluation is carried out for each winding position, based on their measurement data, a mathematical link symbolizing the current winding circumference, which has been cleared of the randomness of the current measured value recording, is repeated again and again at very short time intervals, so that the current winding circumference or winding radius is derived from this link or bobbin diameter is calculated and that the linking result is used with the least possible delay for the purpose of displaying, influencing the winding process, determining the thread length and / or for ending the winding process.

The invention is based on the following findings:

If a cylindrical drive drum drives a conical coil by friction, the friction ratio between the drum and the coil results in a speed ratio which relates to the driven diameter of the conical coil. The circumferential speed of the coil is smaller towards the small diameter and greater than the circumferential speed of the drum towards the larger coil diameter.

Under the condition
V _Tr = γ _Tr · ω _Tr
and
V _Sp = γ _Sp · ω _Sp
and the constraint:
V _Tr = V _Sp
applies

formula 1

mit ^VTr = Umfangsgeschwindigkeit Trommel ^VSp = Umfangsgeschwindigkeit Spule ^rSp = Spulenradius (neutrale Zone) ^rTr = Trommelradius ^ωSp = Spulenwinkelgeschwindigkeit ^ωTr = Trommelwinkelgeschwindigkeit ^TSp = Spulenperiodendauer ^TTr = Trommelperiodendauer

With ^V Tr = Peripheral speed drum ^V Sp = Peripheral speed coil ^r Sp = Coil radius (neutral zone) ^r Tr = Drum radius ^ω Sp = Coil angular velocity ^ω Tr = Drum angular velocity ^T Sp = Spool period ^T Tr = Drum period

According to Formula 1, the driven diameter of the package can be determined.

In order to obtain information about the outside diameter, i.e. the cut-off diameter, of conical bobbins using this formula, it was investigated according to which laws the driven diameter behaves during winding operation.

The following resulted:

The driven diameter depends on the thread tension, i.e. on the bobbin running time (seasonal fluctuations), on the spool taper and on the weight of the spool.

The position of the driven diameter on the coil is relatively constant during the entire coil running time.

• 1. die absolute Lage des angetriebenen Durchmessers beziehungsweise die Veränderung dieser Lage während der Spulenlaufzeit,
• 2. die relative Lage des angetriebenen Durchmessers (Saisonschwankungen) beziehungsweise die Veränderung dieser Lage durch Fadenspannungsschwankungen.

There are two phenomena:

• 1. the absolute position of the driven diameter or the change in this position during the coil running time,
• 2. the relative position of the driven diameter (seasonal fluctuations) or the change in this position due to thread tension fluctuations.

The first phenomenon depends on the taper of the coil. It is therefore less important for the repeatability of the measurement method.

The second phenomenon is responsible for the repeatability of the measurement method. What is striking is the wide range with a low spool force. Thread tension fluctuations during a cop run time have a strong impact. This bandwidth reduces the repeatability of the process.

mit
d₀ = Ausgangsdurchmesser
2δ = Durchmesserzunahme pro Spulenumdrehung
v = Geschwindigkeit des Fadens
t = Zeit
Mit δ« d₀ gilt:

Mit φ̇ (t) = ω (t) und mit

Nach Umformen, Integration und Einsetzen der Formel 1 ergibt sich für die Durchmessererfassung aufgrund der Spulenreisezeitmessung:Two measurable quantities are available for determining the driven diameter according to Formula 1, the time of the coil travel and the number of revolutions of the coil during this time. Depending on these two parameters, an initial formula can be set up. The following applies to the coil diameter depending on the coil travel time:

With
d₀ = initial diameter
2δ = diameter increase per spool revolution
v = speed of the thread
t = time
With δ «d₀:

With φ̇ (t) = ω (t) and with

After reshaping, integrating and inserting Formula 1, the following results for the diameter detection based on the coil travel time measurement:

Formula 2:

The following applies to the coil diameter as a function of the coil revolutions:

For the diameter detection based on the coil revolution measurement results

Formula 3:

d _Sp = d₀ + 2 · ω _Sp
The coil diameter can be calculated using both mathematical equations. The parameters to be determined for the respective coil are identical in both formulas, namely d₀ and δ. When determining the two parameters, a mathematical compensation method is required, which sets d₀ and δ so that the sum of the error squares of the measured diameter value is minimal compared to the pre-calculated diameter value. This can be done with the help of a mathematical filter, for example a Kalman filter.

The filters are used to determine the values of the two parameters d _OK and δ _K , which parameterize the theoretical coil diameter profile. With the values of these parameters, however, no winding process control, for example a diameter adjustment, is possible.

If the values of these parameters and the current measured coil travel time or the current number of coil revolutions are used in the output formulas 2 and 3, a diameter d _m is obtained which is cleared of statistically distributed errors (property of the filter).

This procedure is shown in the flow chart of FIG. 7. The spool period T _{Sp of} the cross-wound bobbin and the drum period T _{Tr of} the drive drum are measured continuously. The diameter d _{Sp of} the cross-wound bobbin is determined at precisely defined intervals according to Formula 1, A. Since the number of revolutions of the coil, B, or the coil running time, C, are known from the measurement of the coil period, each can be calculated using the mathematical method Compensation method determine the values of the parameters d _OK and δ _K. The mathematical equalization methods require the mathematical filters that can be developed from Formula 2, D, and Formula 3, E. The diameter can be calculated using formulas 2 and 3, so that a new diameter value d _m is present after each measurement. The increase in the coil diameter during the coil travel can thus be measured.

D _m of the diameter can be applied to the length l _m of the wound yarn are closed. A formula for calculating the yarn length results from the general relationship v · t = l and the transformation of Formula 2:

Formula 4:

If d _OK and δ _{K are} determined simultaneously using the mathematical filter developed from Formula 3, the increase in length up to this point in time can be calculated.

The randomness of the current measured value recording was mentioned above. Without measures according to the invention, the coil circumference can only be determined fuzzy within a more or less wide range. The influence on the winding process, the display, the determination of the thread length or the detection of the bobbin diameter which is decisive for ending the winding process or the thread length which is decisive for ending the winding process is correspondingly imprecise.

The invention now ensures that a bobbin circumference cleaned from the coincidences of the winding process can be determined with a significantly smaller inaccuracy bandwidth, so that the influence on the winding process can be made with much greater accuracy and with more precise reproducibility, so that a total Quality increase of the package production can be achieved.

In a further development of the invention, it is provided that the measured values representing the growth of the package are continuously recorded and processed in at least one winding unit computer assigned to the individual winding units of the textile machine for further evaluation, that the further evaluation may be carried out in a higher-level computer connected to the winding unit computer or units is that, if necessary, in the higher-level computer for each winding station, based on their measurement data, a new mathematical link symbolizing the current bobbin circumference, which has been cleared of randomness of the current measured value recording, is carried out again and again at very short time intervals, that the current bobbin circumference or bobbin radius or bobbin diameter is calculated from this linkage and that the linking result, if necessary, again to the winding station computer for the purpose of displaying, influencing the winding process, determining tion of the thread length and / or for the purpose of ending the winding process is transmitted with as little delay as possible.

In a further development of the invention it is provided that in the computer or in the higher-level computer within the scope of the mathematical linkage for each winding unit, based on their measurement data, again and again at very short time intervals symbolizing the current coil size, which has been cleared of the randomness of the current measured value recording, over the winding time or the coil revolutions mathematical Compensation function is calculated and that the current coil circumference or coil radius or coil diameter is calculated from this compensation function.

To measure the circumference of cross-wound bobbins driven by drive drums on the circumference, the measured values of a sensor detecting the angle of rotation of the drive drum are advantageously linked to the measured values of a sensor detecting the angle of rotation of the cross-wound bobbin, in order to infer the result of the linking of the circumference of the cross-wound bobbin, in the computer or in Superordinate computer from these continuously new connection results again and again the mathematical connection effecting the elimination of the randomness of the current measured value recording is formed or the compensation function is calculated.

There is therefore a constant correction of the value or linking result calculated shortly before, the accuracy of the determination of the coil circumference increasing at least up to a limit value.

In a further development of the invention it is provided that selected measured values of the winding travel or their linking results are used to calculate the compensation function. Those measured values or their linking results which are obtained from a selectable point in time of the winding travel are advantageously used for calculating the compensation function. A specific period of time can also be selected and this period of time can extend, for example, to a period of time which, calculated from the respective measurement point in time, always points to the past at the same time interval.

In a further development of the invention it is provided that the compensation function is calculated using mathematical filters. A filter of the Kalman filter type is advantageously used as the mathematical filter.

In a development of the invention, the compensation function is represented as a polynomial.

In a further development of the invention it is provided that the angular velocities of the drive drum and the cheese are measured and linked and stored in one of the computers before the compensation function is calculated from the link results. Preferably, a higher-level computer takes over the calculation of the compensation function and the compensation function in turn symbolizes the measurement result that has been cleaned of randomness.

As an alternative to this, a further development of the invention provides that the period duration ratio of the coil revolution to the drive drum revolution is determined and stored in one of the computers before the compensation function is calculated from these linking results (see formula 1 above).

In a further development of the invention, the signals, possibly transmitted back from the higher-level computer, representing the current bobbin circumference or bobbin radius or bobbin diameter, are combined in the computer or in the bobbin station computer with the signals representing the angle of rotation of the cross-wound bobbin and the angle of rotation of the drive drum in order to derive the current wound thread length and / or calculate the current winding density, display it if necessary and compare it with setpoints, intervening in the winding process if necessary on the basis of the comparison result.

For example, the course of a winding trip can be saved as a setpoint. If the current winding cycle does not match the specified target winding cycle, the winding density of the package can be influenced, for example, by varying the thread tension and the package can be adjusted, for example, either to a constant winding density or to a winding density that changes continuously in the course of the winding phase. If tolerances are exceeded, the winding process can be interrupted because the cheese no longer meets the quality requirements.

In a device for determining the bobbin circumference of cross-wound bobbins on a textile machine producing cross-wound bobbins and for evaluating the result resulting from measured values which are produced by sensors which detect the increase in the cross-wound bobbin and which are evaluated appropriately, the method is provided in a further development of the invention that the sensors are connected to at least one computer that prepares the measured values for further evaluation, that a link program for a mathematical linkage of the prepared measured values symbolized by the randomness of the current measured value recording and symbolizing the current coil size is entered into the computer, and that the computer has devices for displaying the linking result and / or devices for influencing the winding process in accordance with the linking result and / or devices for determining the thread length in accordance with the linking result and / or Has facilities for ending the winding process in accordance with the linking result.

The link result can be shown on a display, for example. The winding process can be ended, for example, when the desired thread length is reached or when the desired current bobbin circumference is reached. With conical The current coil size is in the so-called neutral zone.

In a development of the invention, in a device for determining the bobbin circumference of a textile machine producing cross-wound bobbins and for evaluating the result, resulting from measured values which are produced by the growth of the cross-wound bobbin and which are evaluated appropriately, for carrying out the method in a further development of the invention It is provided that the sensors are connected to at least one winding station computer that prepares the measured values for further evaluation, that the winding station computer is connected via a first operative connection to a higher-level computer to which a link program for a mathematical link that cleans the randomness of the current measured value recording and symbolizes the current bobbin size the measured values prepared by the winding station computer are input that the higher-level computer has a second operative connection for transmitting the linking result to the winding station computer d that the winding unit computer has devices for displaying the linking result and / or devices for influencing the winding process in accordance with the linking result and / or devices for determining the thread length in accordance with the linking result and / or devices for terminating the winding process in accordance with the linking result.

In a further development of the invention, the linking program is set up for calculating a mathematical compensation function symbolizing the current coil size, which has been cleaned of randomnesses of the current measured value recording, over the winding time.

The linking program advantageously has a mathematical filter to represent the compensation function. A Kalman filter has proven to be a suitable filter. The compensation function can advantageously be represented as a polynomial in the computer or higher-level computer. The polynomial representation of a function is particularly advantageous and expedient with regard to the use of an electronic computer.

In textile machines whose cross-wound bobbins are driven on the circumference by drive drums, in a further development of the invention both the cross-wound bobbin and the drive drum are each assigned a sensor that detects the angle of rotation. The sensor that detects the angle of rotation, the computer or the winding unit computer advantageously has a device for measuring the duration of the passage through a rotation angle of a predetermined size, the computer, the winding unit computer or the higher-level computer having a program for determining the period duration ratio of the rotation of the spool to the rotation of the drive drum. The relevant mathematical relationships were mentioned at the beginning (see Formula 1).

• Fig. 1 zeigt ein erstes Ausführungsbeispiel der Erfindung.
• Fig. 2 zeigt ein zweites Ausführungsbeispiel der Erfindung.
• Fig. 3 zeigt eine prinzipielle analytische Darstellung einer Ausgleichsfunktion.
• Fig. 4 zeigt ein Diagramm einer ersten Spulreise.
• Die Fig. 5 und 6 zeigen ein Diagramm einer zweiten Spulreise.
• Fig. 7 wurde bereits abgehandelt.

Exemplary embodiments of the invention are to be explained on the basis of the schematic drawings.

• Fig. 1 shows a first embodiment of the invention.
• Fig. 2 shows a second embodiment of the invention.
• 3 shows a basic analytical representation of a compensation function.
• Fig. 4 shows a diagram of a first winding trip.
• 5 and 6 show a diagram of a second winding trip.
• Fig. 7 has already been dealt with.

According to Fig. 1, the sleeve 2 of a cross-wound bobbin 3 is rotatably held in a bobbin frame 4, 4 'mounted on the winding unit 1 of an automatic winder not shown here, tapered sleeve plate 5, 6. The cheese 3 lies on a drive drum 7. It is rotated by the drive drum 7 due to friction. The thread 9 running in the direction of the arrow 8 runs through a thread eyelet 10 before it reaches the cheese 3, guided by a sweeping thread groove 11. The thread 9 comes from a payout spool, not shown here, for example a spinning cop.

In this embodiment, the drive drum 7 is fixed on the shaft 12 of a drive motor 13.

A computer R is assigned to the winding unit 1. Via electrical active connections 14 'to 17', the drive motor 13, the sensors 24 and 25 and a display 26 are connected to the computer R. The sensors 24 and 25 are rotation angle sensors. The angle of rotation sensor 24 continuously measures the angle of rotation of the sleeve plate 6 and thus also the angle of rotation of the sleeve 2 and the cross-wound bobbin 3. The angle of rotation sensor 25 continuously measures the angle of rotation of the shaft 12 and thus also the angle of rotation of the drive drum 7 'And 16' in the computing unit 27 'of the computer R. At intervals of about a tenth of a second, the coil radius is determined from the measured values then present in the computing unit 27' according to Formula 1, which can also be used as a unit of measurement for the coil circumference. Instead of the coil radius, the coil circumference can also be calculated directly.

The computer R contains a computer program with the aid of which a compensation function y = f (x) is formed according to FIG. 3.

If, for example, at times x1 to x6, the coil radii y1 to y6 calculated in the computer R enter, which scatter considerably up and down, although ideally they should lie on a slightly rising, slightly convex line, the compensation calculation results in a compensation function, which follows the thick solid line. In this case, the vertical distances of the measuring points from the curve of the compensation function are approximately the same. The fluctuation range of the compensation function is less than the fluctuation range of the individual measured values.

The computer R now ensures that only the compensation function y = f (x) is evaluated. The link result arrives at the control unit 28 '. The control unit 28 'has a setpoint generator 29, which is impressed with a set winding travel, which follows the curve 30. The control unit 28 'is now able to act on the winding speed by controlling the drive motor 13 with the aim of equalizing the actual winding travel, symbolized by the compensation function y = f (x) according to FIG. 3, of the desired winding travel 30. The current coil circumference or coil radius or coil diameter determined by the computer R is shown on the display 26.

The exemplary embodiment according to FIG. 2 differs from the exemplary embodiment according to FIG. 1 by the following:

A winding station computer SR is assigned to winding unit 1. Via electrical active connections 14 to 19, the drive motor 13, the sensors 24 'and 25', a display 26 and a superordinate computer, called the central computer ZR, are connected to the winding station computer SR. Further active connections 20, 21 and 22, 23 lead from the central computer ZR to any further winding station computers which may still be present.

The two sensors 24 'and 25' include devices for measuring the duration of the passage of an angle of rotation of a predetermined size. The sensor 24 'gives the active connection 15 in an uninterrupted sequence, the period of a quarter turn of the sleeve plate 6 to the computing unit 27 of the winding unit computer SR. For this purpose, the rear end of the sleeve plate 6 is provided with four magnets 31 distributed uniformly over the circumference, the passage of which is detected by the sensor 24 '. In the same way, the sensor 25 'continuously transmits the period of a quarter turn of the winding roller 7 to the computing unit 27. For this purpose, the rear end of the shaft 12, which is mounted in a bearing 33, carries a disc 34 which is distributed uniformly over the circumference carries four magnets 32. The passage of the magnets is detected by the sensor 25 '.

The measurement results are processed in accordance with Formula 1 and partially fed to the central computer ZR.

The central computer ZR contains the computing program, with the aid of which a compensation function y = f (x) according to FIG. 3 is formed.

The result of the link is sent from the central computer ZR via the active connection 19 back to the control unit 28 of the winding station computer SR. The control unit 28 has a setpoint generator 29, which is impressed with a set winding travel that follows the curve 30. The control unit 28 is now able to act on the winding speed by controlling the drive motor 13 with the aim of aligning the actual winding travel, symbolized by the compensation function y = f (x) according to FIG. 3, to the desired winding travel 30. The current coil circumference or coil radius or coil diameter reported by the central computer ZR is shown on the display 26.

FIG. 4 shows the diagram of a winding trip as it could be shown in the display 26 or printed out by the winding station computer SR, for example. The winding time is plotted on the X axis. The vertical lines mark spool stoppages that were caused by the replacement of spinning bobbins. The cross-bobbin diameter is plotted on the Y-axis.

The lower curve reflects the calculation result of the computing unit 27 of the exemplary embodiment according to FIG. 1. Each time the payout spool is changed, the curve shows noticeable jumps and during the travel of the payout spool, the turn is also very uneven, which is not so clearly visible in FIG. 4.

Since this is supposed to be a conical cheese, the lower curve shows the measured driven diameter, whereas the upper curve shows the diameter at the thick end of the coil.

5 and 6 show an extract from the log of a winding travel of a conical cross-wound bobbin, which was carried out with a device according to FIG. 2. The spool revolutions and the payout spool change are plotted on the X axis. The individual reel changes are marked with consecutive numbers. The cross-bobbin diameter is plotted on the Y-axis. The lower, thickly printed curve results from the continuous application of tangents to the compensation curve of the current diameter of the conical cheese, determined by the central computer ZR. Within this curve and with peaks protruding from the curve, the very unevenly running curve of the diameter calculated by the computing unit 27, based on the measured values of the sensors 24 'and 25', is entered. The computer program of the central computer ZR contains here a Kalman filter to determine the compensation curve. The compensation function becomes better and better from the beginning of the winding cycle because the Kalman filter allows past measurement results to be incorporated. The window width of the acquisition can be controlled.

The vertical lines each mark interruptions in the winding that were necessary due to the replacement of the pay-off spools. The diameter of the conical cross-wound bobbin was manually determined at its thick end each time the supply reel was changed. The determined values were subsequently entered in the log printed out by the winding unit computer SR. The connecting line represents the upper, thinly drawn curve.

Claims (20)

1. A method for determining the bobbin circumference of cross-wound bobbins on a textile machine producing cross-wound bobbins and for evaluating the result, in which the extent of the cross-wound bobbin reached is inferred from measured values which are produced by sensors which detect the growth of the cross-wound bobbin and which are evaluated appropriately.
characterized by
that the measured values are continuously recorded and processed and possibly stored in at least one computer for further evaluation, that during further evaluation for each winding unit, based on their measurement data, continuously and at very short time intervals, a new mathematical link symbolizing the current number of coils, which has been cleared of the randomness of the current measured value recording it is carried out that the current bobbin circumference or bobbin radius or bobbin diameter is calculated from this linkage and that the linkage result is used with the least possible delay for the purpose of displaying, influencing the bobbin winding process, determining the thread length and / or for ending the bobbin winding process. 2. The method according to claim 1, characterized in that the measured values are continuously recorded and processed in at least one winding unit computer assigned to the individual winding units of the textile machine for further evaluation, that the further evaluation is optionally carried out in a higher-level computer connected to the winding unit computer or units. that, if necessary, in the higher-level computer for the or each winding station, based on their measurement data, a new mathematical link symbolizing the current coil size, which is cleared of the randomness of the current measured value recording, is carried out again and again at very short time intervals, that the current coil size or coil radius or coil diameter is calculated from this link and that the linking result, if necessary, again to the winding station computer for the purpose of displaying, influencing the winding process, determining the thread length and / or Purpose of ending the winding process is transmitted with as little delay as possible. 3. The method according to claim 1 or 2, characterized in that in the computer or in the higher-level computer within the scope of the mathematical link for each winding unit based on their measurement data continuously in very small time intervals again and again the current coil size adjusted from randomnesses of the current measured value acquisition over the Winding time or the mathematical compensation function symbolizing the coil revolutions is calculated and that the current coil circumference or coil radius or coil diameter is calculated from this compensation function. 4. The method according to any one of claims 1 to 3, characterized in that for the circumferential detection of cross coils driven by drive drums on the circumference, the measured values of a sensor detecting the angle of rotation of the drive drum are linked to the measured values of a sensor detecting the angle of rotation of the cross coil, in order to derive from the linking result to conclude the extent of the package that has been reached, and that in the computer or in the higher-level computer, the continuously obtained new connection results consistently form the mathematical connection that eliminates the randomness of the current measured value recording or that the compensation function is calculated. 5. The method according to claim 3 or 4, characterized in that selected measured values of the winding travel or their linking results are used to calculate the compensation function. 6. The method according to any one of claims 3 to 5, characterized in that those measured values or their linking results are used to calculate the compensation function, which are obtained from a selectable time of the winding trip. 7. The method according to any one of claims 3 to 6, characterized in that the coefficients of the compensation function are calculated by means of mathematical filters. 8. The method according to claim 7, characterized in that a filter of the type of a Kalman filter is used as the mathematical filter. 9. The method according to any one of claims 3 to 8, characterized in that the compensation function is represented as a polynomial. 10. The method according to any one of claims 4 to 9, characterized in that the angular speeds of the drive drum and the cheese are measured and linked and stored in one of the computers before the compensation function is calculated from the link results. 11. The method according to any one of claims 4 to 10, characterized in that the period duration ratio of the coil rotation to the drive drum rotation is determined and stored in one of the computers before the compensation function is calculated from these linking results. 12. The method according to any one of claims 1 to 11, characterized in that, in the computer or in the winding unit computer, the signals, possibly transmitted by the higher-level computer, representing the current bobbin circumference or bobbin radius or bobbin diameter again represent the rotation angle of the cross-wound bobbin and / or the rotation angle of the drive drum Signals are linked in order to use them to calculate the current wound thread length and / or the current winding density, if necessary to display them and to compare them with target values, with the result of the comparison possibly intervening in the winding process. 13. Device for determining the coil circumference of cross-wound bobbins on a textile machine producing cross-wound bobbins and for evaluating the result from measured values produced by sensors which detect the growth of the cross-wound bobbin and are evaluated appropriately for executing the method according to one of claims 1 to 12, characterized in that the sensors (24, 25; 24 ′, 25 ′) are connected to at least one computer (R) which prepares the measured values for further evaluation that the computer (R) has been given a link program for a mathematical linkage of the prepared measured values, which has been corrected from randomness of the current measured value recording and symbolizes the current coil size, and that the computer (R) has devices (26) for displaying the link result and / or devices ( 13, 28) for influencing the winding process in accordance with the linking result and / or devices (28) for determining the thread length in accordance with the linking result and / or devices (13, 28) for ending the winding process in accordance with the linking result. 14. Device for determining the bobbin circumference of cross-wound bobbins on a textile machine producing cross-wound bobbins and for evaluating the result from measured values that are produced by sensors that detect the growth of the cross-wound bobbin and that are evaluated accordingly, for carrying out the method according to one of claims 1 to 12, characterized in that the sensors (24, 25; 24 ', 25') are connected to at least one winding station computer (SR) which prepares the measured values for further evaluation, that the winding station computer (SR) is connected to a higher-level computer via a first operative connection (18) (ZR) is connected, to which a link program for a mathematical linkage of the measured values prepared by the winding station computer (SR), which has been corrected from coincidences of the current measured value recording and symbolizes the current bobbin circumference, is entered that the higher-level computer (ZR) has a second operative connection (19) for transmission of Linking result to the winding station computer (SR) and that the winding station computer (SR) has devices (26) for displaying the linking result and / or devices (13, 28) for influencing the winding process in accordance with the linking result and / or devices (28) for determining the thread length in accordance with the linking result and / or means (13, 28) for ending the winding process in accordance with the linking result. 15. Device according to claim 13 or 14, characterized in that the linking program is set up for calculating a mathematical compensation function symbolizing the current coil circumference, which has been cleaned of randomnesses of the current measured value recordings, over the winding time or coil revolutions. 16. The device according to claim 15, characterized in that the linking program for representing the compensation function has a mathematical filter. 17. The device according to claim 16, characterized in that the filter is a Kalman filter. 18. Device according to one of claims 13 to 17, characterized in that the compensation function in the computer (R) or in the higher-level computer (ZR) can be represented as a polynomial. 19. Device according to one of claims 13 to 18, characterized in that in textile machines whose cross-wound bobbins (3) are driven on the circumference by drive drums (7), both the cross-wound bobbin (3) and the drive drum (7) each have an angle of rotation detecting sensor (24, 24 '; 25, 25') is assigned. 20. The device according to claim 19, characterized in that the sensor detecting the angle of rotation (24 ', 25'), the computer (R) or the winding unit computer (SR) has a device for measuring the duration of the passage of an angle of rotation of a predetermined size and that the computer (R), the winding unit computer (SR) or the higher-level computer (ZR) has a program for determining the period duration ratio of the bobbin rotation to the drive drum rotation.

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