JPH0377717A - Arithmetic unit for diameter of coil - Google Patents

Abstract

PURPOSE:To improve exactness of operation of the diameter of coil by deciding error correction factor for detected number of revolution of a measuring roll for revolution by fazzy inference according to tension of material and acceleration or deceleration for recoiling material. CONSTITUTION:A device with which the diameter of coil is operated by detecting the number of revolution of the measuring roll 6 for the diameter of coil is composed of a detecting means 11 for tension of material of coil, an operating means 10 for acceleration or deceleration with which acceleration or deceleration for a recoiling material is operated from time variation rate of the detected number of revolution of the measuring roll 6 for the diameter of coil and a fazzy treating means 12 to decide error correction factor of the detected number of revolution of the measuring roll for the diameter of coil by fazzy inference based on tension of material and acceleration or deceleration. By this way, even if slip is generated between the material and the measuring roll due to the variation of operating conditions, the diameter of coil can be accurately operated.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a winding system for continuously unwinding or winding material in metal rolling equipment or process treatment line equipment. The present invention relates to a coil diameter calculating device that calculates the coil diameter of a return machine (or winding machine).

(Prior art) In general, in equipment that has an unwinder for continuously unwinding material coils, in order to calculate the coil diameter of the material coil, it is necessary to calculate the rotation speed of the unwinding machine and the installation installed downstream of the unwinding machine. The material coil diameter is calculated from the rotation speed ratio of the coil diameter measuring roll.

FIG. 3 is a schematic diagram of a conventional coil diameter calculating device of this type.

In the figure, in order to pass the material 1 to the downstream process, a material coil 2 wound on an unwinding machine 3 is unwound, and the coil diameter of the material coil at any given time changes continuously. .

In order to calculate this coil diameter, the rotation speed PM of the unwinding machine 3
The rewinding machine rotation speed detecting means 5 detects the rotation speed P8 of the coil diameter measuring roll 6 installed downstream of the winding machine through the unwinding machine transmission 4, and the measuring roll transmission 7 detects the rotation speed P8 of the coil diameter measuring roll 6 installed downstream of the winding machine. The measuring roll rotation speed detecting means 8 detects the number of rotations through the measuring roll, and the coil diameter calculation means 9 calculates the coil diameter based on the detected rotation speeds PM and Ps.

In this case, the following relationship holds true between the length of material 1;Ha returned by the unwinding machine per unit time and the passing length of the coil diameter measuring roll 6.

By transforming this equation, the following equation is obtained.

However, DM: Coil diameter of material coil [mm] Ds: Roll diameter of static 1 constant roll [mm] KM: Unwinding machine 1
Number of pulses per revolution [p/r e v] Ks: im
Number of pulses per m crawl rotation [p/rev] Gear ratio Gs of GM two-rewinder transmission: Gear ratio of measurement roll transmission PM Two-rewinder rotation speed [pl Ps: Measuring roll rotation speed [pco It is.

KM mentioned above, 8. GM, G8. Since D8 is fixed data for each piece of equipment, the coil diameter calculation means 9 uses the above (
1) Use the formula to calculate the coil diameter DM of the material coil as P s /
Calculate as a function of PM.

(Problems to be Solved by the Invention) In the conventional coil diameter calculating device described above, the coil diameter can be easily calculated from the ratio of the rotational speeds of the unwinding machine and the measuring roll.

However, if the material becomes wavy due to changes in the material unwinding acceleration/deceleration rate or changes in material tension during equipment operation, or if the friction between the material and the measuring roll changes, slipping may occur between the material and the measuring roll. As a result, a detection error occurred in the count values of the rewinding machine rotation speed and the measurement roll rotation speed, making it impossible to accurately calculate the coil diameter of the material coil.

Such phenomena tend to occur during acceleration and deceleration of the material, and therefore,
It was common to lock the coil diameter calculation during acceleration/deceleration and start calculation in a steady state. This was true not only for unwinding machines but also for winding machines.

This invention was made to solve the above problems, and even if slippage occurs between the material and the measuring roll due to changes in the acceleration/deceleration rate and material tension during material unwinding or winding, the It is an object of the present invention to provide a coil diameter calculating device that can accurately calculate the coil diameter of a material coil of a winding machine or winding machine.

[Structure of the invention]

(Means for Solving the Problems) This invention provides a tension detection means for detecting the tension of a material, and an acceleration/deceleration rate for unwinding or winding the material based on the detected time rate of change in the rotation speed of a coil diameter measuring roll. an acceleration/deceleration rate calculation means for calculating, and based on the detected material tension and the calculated acceleration/deceleration rate, determine an error correction rate of the detected rotation speed of the coil diameter measuring roll by fuzzy reasoning;
The present invention is characterized by comprising fuzzy processing means for correcting the calculated coil diameter of the coil diameter calculating means using the error correction rate.

(Function) In this invention, the error correction rate of the detected rotation speed of the co-rotating measuring roll is determined by fuzzy reasoning according to the tension of the material and the acceleration/deceleration rate of material unwinding or winding. Since the calculated coil diameter is corrected using the error correction factor, even if slippage occurs between the rotating measuring roll and the material due to changes in material tension or acceleration/deceleration rate, the coil diameter can be calculated accurately. can.

(Embodiment) FIG. 1 is a schematic diagram of an embodiment of the present invention. In the figure, the same elements as in FIG. 3 are given the same reference numerals and their explanations will be omitted. Here, the acceleration/deceleration rate calculation means 1 calculates the material rewinding acceleration/deceleration rate a from the time change of the measurement roll rotation speed P8 detected by the measurement roll rotation speed detection means 8.
0, a tension detection means 11 that detects the material tension T, a rotation speed detection error correction factor a of the coil diameter measuring roll 6 based on the material unwinding acceleration/deceleration rate a and the material tension T using a fuzzy inference method, A fuzzy processing means 12 for correcting the calculated coil diameter of the coil diameter calculating means 9 using this correction factor α is newly provided.

The operation of this embodiment configured as described above will be explained below.

First, when the measurement roll rotation speed PS detected by the measurement roll rotation speed detection means 8 is applied to the acceleration/deceleration rate calculation means 10, this acceleration/deceleration rate calculation means 10 calculates the degree of material rewinding based on the time change of the measurement roll rotation speed P8. Calculate the speed rate a.

Next, the fuzzy processing means 12 uses fuzzy reasoning to determine the fixed roll 6 with all coil diameters based on the material unwinding acceleration/deceleration rate a calculated by the acceleration/deceleration rate calculation means 10 and the material tension T detected by the tension detection means 11. A rotation speed detection error correction factor α is determined and added to the coil diameter calculation means 9.

Next, the coil diameter calculating means 9 corrects the count value P3 of the d111 constant roll rotation speed using the following equation.

Psa-Ps (14-α) - (2) Then, this PSa is substituted into the above equation (L) to calculate the accurate material coil diameter D. In this case, instead of correcting the -α count value P3, the material coil diameter may be directly corrected by calculating the following equation.

D −D (1+α) ...(3)l α
I Next, a method for determining the measurement roll rotation speed detection error correction factor α from the material rewinding acceleration/deceleration rate a and the material tension T by fuzzy reasoning will be described in detail.

FIG. 2 shows the fuzzy control rules and membership functions applied to this fuzzy inference. In the figure, R1R2, R3, R
4 is a fuzzy control rule, A11"12" 21
” 22” 31” 32” 41'A42' ”I
'B2'B3' B4 is a member subfunction.

In this case, the inputs (premises) for inference are the material unwinding acceleration/deceleration rate a and the material tension T, and the output (conclusion) is the measurement 50
The detection error history correction rate α of the count value of the number of revolutions is the fuzzy control rule R1, R2°R3,R, which connects the input (premise) and the output (conclusion).

Here, when the Min calculation method is applied, the following results.

(Forward a-”al and T-T.

(Fuzzy control rule) R: If a −A and T −A 12, α−B1
1 11.

R: If a −A and T −A 22, α=8
22 2+.

R; If a ”” A a h and T-wA32, then α
It is Seal B3.

R: If a-A and T-A 42 then α-B44
It is 41.

(Conclusion) α−α1.

Next, fuzzy control rules and membership functions will be explained.

■Fuzzy control rule R1 Membership function A11 indicates "high degree of acceleration" of material rewinding. The horizontal axis is the acceleration/deceleration rate, and the vertical axis is the degree of conformity.

Membership function A12 indicates "high degree of material tension". The horizontal axis is the tension, and the vertical axis is the goodness of fit.The membership function Bl is a correction factor that corrects the error by the amount in which the detected rotational speed of the constant roll is ``larger'' than the actual material passing length. This is to set.

Here, the fitness of the membership function All for a certain acceleration rate and the fitness of the membership function A12 for a certain tension are compared, and the membership function 81 is cut at the smaller fitness value. The α coordinate of the center of gravity of the cut membership function B becomes the correction factor inferred by the fuzzy control rule R1.

■Fuzzy control rule R2 Membership function A2□ indicates "high degree of acceleration rate" of material unwinding. The horizontal axis is the acceleration/deceleration rate, and the vertical axis is the degree of conformity.

Membership function A22 indicates "low degree of material tension". The horizontal axis is the tension, and the vertical axis is the degree of conformity.The membership function 82 is a correction factor that corrects the error of the detected rotation number of the measuring roll being "slightly larger" than the actual material passing. This is to set.

Here, the fitness of the membership function A21 for a certain acceleration rate and the fitness of the membership function A2° for a certain tension are compared, and the membership function 82 is cut at the smaller fitness value. The α coordinate of the center of gravity of the cut membership function 82 becomes the correction factor inferred by the fuzzy rule R2.

■Fuzzy control rule R3 Membership function A31 indicates the "large degree of deceleration rate" of material rewinding. The horizontal axis is the acceleration/deceleration rate, and the vertical axis is the degree of conformity.

Membership function 32 indicates "greater degree of material tension". The horizontal axis is the tension, and the vertical axis is the degree of conformity.The membership function 83 is a correction factor that corrects the error of the detected Ju1 rotation number of the measuring roll being "slightly smaller" than the actual material passing. This is to set.

Here, the fitness of the membership function A31 for a certain deceleration rate and the fitness of the membership function A32 for a certain tension are compared, and the membership function 83 is cut at the value of the smaller fitness. The α coordinate of the center of gravity of the cut membership function 83 becomes the oil pressure rate inferred by the fuzzy rule R3.

■Fuzzy control rule R4 Membership function A4□ indicates the "large degree of deceleration rate" of material rewinding. The horizontal axis is the acceleration/deceleration rate, and the vertical axis is the degree of conformity.

Membership function A42 indicates "low degree of material tension". The horizontal axis is the tension, and the vertical axis is the degree of conformity.The membership function 84 sets a correction factor that corrects the error by the amount in which the detected rotational speed of the measuring roll is "smaller" than the actual material threading. It is something to do.

Here, the fitness of the membership function A41 for a certain deceleration rate and the fitness of the membership function A4° for a certain tension are compared, and the membership function 84 is cut at the smaller fitness value. The α coordinate of the center of gravity of the cut membership function 84 becomes the correction factor inferred by the fuzzy rule R3.

Membership function B meaning correction factor cut by the above-mentioned fuzzy control rules R, , R2, R3°R4
l, B2. B3. Membership function B created by superimposing B4.

The α coordinate of the center of gravity of the figure is the fuzzy control rule R1°R2
, R3, and R4 are the measurement roll rotation speed detection error correction factors inferred.

Next, using FIG. 2 as an example, the material unwinding acceleration/deceleration rate a is at
, and when the material tension T is Tl, the process of determining the rotation speed detection error correction factor αI of the measuring roll will be explained.

(2) Reasoning based on fuzzy control rule R1 Material rewinding When acceleration/deceleration rate a is al, the fitness determined by membership function A11 is ωl. When the material tension T is TI, the fitness determined by the membership function A1□ is ω2.

In this example, since ω1 minus ω2, the membership function 81 is cut at the value of ωl, so the shaded part of B1 is the member that means the measurement roll rotation speed detection error correction rate inferred by the fuzzy rule R1. becomes the ship function.

(2) Reasoning based on the fuzzy control rule R2 Material rewinding When the acceleration/deceleration rate a is al, the fitness determined by the membership function A21 is ω3. When the material tension T is TI, the fitness determined by the member tube function A22 is ω4.

In this example, since ω3>ω4, the membership function 82 is cut at the value of ω4, so the shaded part of B2 is the member that means the measurement roll rotation speed detection error correction rate inferred by the fuzzy rule R2. becomes the ship function.

(2) Reasoning based on the fuzzy control rule R3 Material rewinding When the acceleration/deceleration rate a is al, the fitness determined by the membership function A31 is zero.

Therefore, there is no membership function that means the measurement roll rotation speed detection error correction rate that is inferred by the fuzzy rule R3.

(2) Reasoning based on the fuzzy control rule R4 When the material rewinding acceleration/deceleration rate a is 81, the fitness determined by the membership function A41 is zero.

Therefore, there is no membership function that means the rotation speed detection error correction rate of the measuring roll that is inferred by the fuzzy rule R4.

Thus, in this example, the shaded part of the membership function 81, which means the measurement roll rotation speed detection error correction rate inferred by the fuzzy control rule R1, and the fuzzy control rule R
The α coordinate of the center of gravity of the figure of the membership function BO created by superimposing the shaded part of the membership function 82, which means the rotation speed detection error correction factor of the measuring roll inferred by 2, is the acceleration/deceleration rate a- a and tension T-T1
This is the measurement roll rotation speed detection error correction factor when .

In addition, membership function A11"+2"2+'A2
2・A31・A32・A41・A42・B,・B2・B
3. The shape of B4 is not limited to the above embodiment, and may be changed to other shapes as desired.

Furthermore, the membership function A11"21"31"41, which means the magnitude of the material unwinding acceleration/deceleration rate, may be increased or decreased in number as appropriate. Similarly, the membership function A11"21"31"41, which means the magnitude of the material tension Function A1□.

It is also possible to increase or decrease the number of A22"32"42.

Further, in the above embodiment, a coil diameter calculation device applied to an unwinding machine was described, but the present invention is not limited to this, and can also be applied to a winding machine that winds material in a continuous processing line. can.

〔Effect of the invention〕

As is clear from the above explanation, according to this invention,
Depending on the change in operating conditions, the rotation speed detection error correction factor of the constant roll is determined by fuzzy reasoning based on the acceleration/deceleration rate (unwinding or rewinding of the material) and the material tension, and the calculation coil diameter is determined based on this correction factor. Therefore, even if slippage occurs between the material and the measuring roll due to changes in operating conditions, the coil diameter can be calculated accurately.

3... Rewinding machine, 4... Transmission for the unwinding machine, 5... Rewinding machine rotation speed detection means, 6... Coil diameter measuring roll, 7
... Measuring roll transmission, 8... Measuring roll rotation speed detecting means, 9... Coil diameter calculating means, 10... Acceleration/deceleration rate calculating means, 11... Tension detecting means, 12... Fuzzy Processing means.

Claims (1)

[Claims] Continuously unwinding (or winding) the material in the processing line
The number of revolutions of the unwinding machine (or winding machine) for
The number of revolutions of a coil diameter measuring roll provided downstream (or upstream) of the unwinding machine (or winding machine) is detected, and the coil diameter calculation means detects the number of revolutions of the coil diameter measuring roll provided downstream (or upstream) of the unwinding machine (or winding machine), and based on these respective revolution numbers, the coil diameter calculating means For those that calculate the coil diameter of
tension detection means for detecting the tension of the material; acceleration/deceleration rate calculation means for calculating the acceleration/deceleration rate of material unwinding (or winding) from the detected time change rate of the rotation speed of the coil diameter measuring roll; Based on the calculated material tension and the calculated acceleration/deceleration rate, an error correction factor of the detected rotation speed of the coil diameter measuring roll is determined by fuzzy reasoning, and the calculated coil diameter of the coil diameter calculation means is corrected by this error correction factor. What is claimed is: 1. A coil diameter calculation device comprising: a fuzzy processing means for calculating a coil diameter;