JP2585808B2 - Coil diameter calculator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to a roll for continuously unwinding (or winding) a material in a metal rolling facility or a processing line facility. The present invention relates to a coil diameter calculator for calculating a coil diameter of a return machine (or a winding machine).

(Prior Art) In general, in a facility having a rewinding machine for continuously rewinding a material coil, to calculate the coil diameter of the material coil, the number of rotations of the rewinding machine and the downstream of the rewinding machine are set. The material coil diameter is calculated from the ratio of the number of rotations of the coil diameter measuring roll.

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

In the same figure, in order to pass the material 1 to the downstream process,
The material coil 2 wound on the rewinding machine 3 is unwound,
The coil diameter of the material coil at any time changes continuously.

In order to calculate this coil diameter, the rotational speed P _M of the rewinding machine 3 is calculated.
And a rewinding motor rotation detecting means 5 for detecting via the rewinding machine transmission 4, the rotational speed P _S of the coil diameter measuring roll 6 located downstream of the winding machine, the measuring roller transmission 7 The number of rotations of the measuring roll 8 detected via the
And a coil diameter calculation means 9 for calculating a coil diameter by P _M and P _S.

In this case, the following equation is established between the material unwinding length of the unwinding machine per unit time and the threading length of the coil diameter measuring roll 6.

By transforming this equation, the following equation is obtained.

Where D _M : coil diameter of material coil [mm] D _S : roll diameter of measurement roll [mm] K _M : number of pulses per rotation of rewinding machine [p / rev] K _S : pulse per rotation of measurement roll Number [p / rev] G _M : Gear ratio of transmission for rewinding machine G _S : Gear ratio of measurement roll transmission P _M : Rewinding machine rotation speed [p] P _S : Measurement roll rotation speed [p] is there.

Above _{K M, K S, G M} , G S, since D _S is the data of a fixed in each equipment, coil diameter calculating means 9 the coil diameter D _M of the material coil using the above equation (1) calculating as a function of P _S / P _M.

(Problems to be Solved by the Invention) In the above-described conventional coil diameter calculation device, the coil diameter can be easily calculated from the ratio of the number of rotations of the rewinding machine and the measurement roll.

However, if the material undulates due to changes in the material rewind acceleration / deceleration rate during operation of the equipment, changes in the material tension, or changes in the friction between the material and the measurement roll, slip occurs between the material and the measurement roll. As a result, detection errors occur in the count values of the rewinding machine rotation speed and the measurement roll rotation speed, and the calculation of the coil diameter of the material coil cannot be performed accurately.

Such development is likely to occur during acceleration / deceleration of the material. Therefore, during acceleration / deceleration, it is common to lock the coil diameter calculation and start the calculation in a steady state. This is true not only for the rewinding machine but also for the winding machine.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem. Even when slippage occurs between a material and a measuring roll due to a change in an acceleration / deceleration rate and a material tension during material rewinding or winding, unwinding is performed. It is an object of the present invention to obtain a coil diameter calculating device capable of accurately calculating a coil diameter of a material coil of a winding machine or a winder.

[Configuration of the invention]

(Means for Solving the Problems) The present invention provides a tension detecting means for detecting a tension of a material,
Acceleration / deceleration rate calculating means for calculating an acceleration / deceleration rate of material rewinding (or winding) from the detected time rate of change of the rotation number of the coil diameter measuring roll, and based on the detected material tension and the calculated acceleration / deceleration rate And fuzzy processing means for determining an error correction rate of the detected rotation speed of the coil diameter measurement roll by fuzzy inference, and correcting the calculated coil diameter of the coil diameter calculation means based on the error correction rate. Things.

(Operation) In the present invention, the error correction rate of the detected rotational speed of the rotation measuring roll is determined by fuzzy inference according to the material tension and the material unwinding (or winding) acceleration / deceleration rate.
Since the calculated coil diameter is corrected by this error correction rate, it is possible to accurately calculate the coil diameter even if slip occurs due to changes in the material tension and the acceleration / deceleration rate between the rotation measuring roll and the material. Can be.

(Embodiment) FIG. 1 is a schematic configuration diagram of an embodiment of the present invention. In the figure, the same elements as those in FIG. 3 are denoted by the same reference numerals, and description thereof will be omitted. Here, the measuring roll rotation number detecting means 8
From the time variation of the measured roll rotation speed P _S detected by acceleration and deceleration rate calculating means for calculating a material unwinding acceleration rate a
10, a tension detecting means 11 for detecting a material tension T, a rotation speed detection error correction rate α of the coil diameter measuring roll 6 based on the material unwinding acceleration / deceleration rate a, and the material tension T, are determined by a fuzzy inference technique, Fuzzy processing means 12 for correcting the calculated coil diameter of the coil diameter calculating means 9 with this correction rate α is newly provided.

The operation of the present embodiment configured as described above will be described below.

First, when detected by the measuring roller rotation speed detection means 8 measurement roll rotation speed P _S is applied to the speed reduction ratio calculating means 10, the acceleration and deceleration rate calculating means 10 from the time change of the measured roll rotation speed P _S, the material wound The return acceleration / deceleration rate a is calculated.

Next, the fuzzy processing means 12 calculates the material rewinding acceleration / deceleration rate a calculated by the acceleration / deceleration rate calculating means 10 and the tension detecting means.
Based on the material tension T detected by 11 and the fuzzy inference, the rotational speed detection error correction rate α of the coil diameter measuring roll 6 is determined and applied to the coil diameter calculating means 9.

Then, the coil diameter calculation means 9 for correcting the count value P _S of the measuring roll rotation speed by the following equation.

P _Sα = P _S (1 + α) (2) Then, this P _Sα is substituted into the above equation (1) to calculate an accurate material coil diameter D _mα . In this case, instead of correcting the count value P _S, performs the following calculation may be corrected material coil diameter directly.

D _mα = D _m (1 + α) (3) Next, a method for determining the rotational speed detection error correction rate α of the measuring roll by fuzzy inference from the material rewinding acceleration / deceleration rate a and the material tension T will be described in detail. .

FIG. 2 shows fuzzy control rules and membership functions applied to the fuzzy inference. In the figure, R ₁ , R ₂ , R ₃ , R ₄ are fuzzy control rules, and A ₁₁ , A ₁₂ , A ₂₁ , A ₂₂ , A ₃₁ , A ₃₂ , A ₄₁ ,
A ₄₂ , B ₁ , B ₂ , B ₃ , and B ₄ are membership functions.

In this case, the inputs (premise) for inference are the material rewinding acceleration / deceleration rate a and the material tension T, and the output (conclusion) is the detection error correction rate α of the count value of the measured roll rotation speed. ) And the output (conclusion) are fuzzy control regulations R ₁ , R ₂ , R ₃ , R ₄ .

 Here, the application of the Min operation method is as follows.

(Premise) a = a ₁ and T = T ₁ (fuzzy control rule) R ₁ : If a = A ₁₁ and T = A ₁₂ , α = B ₁ .

R ₂ : If a = A ₂₁ and T = A ₂₂ , α = B ₂ .

R ₃ : If a = A ₃₁ and T = A ₃₂ , α = B ₃ .

R ₄ : If a = A ₄₁ and T = A ₄₂ , α = B ₄ .

(Conclusion) is α = α _1.

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

Fuzzy control rules R ₁ membership functions A ₁₁ returns material wound showing the "large degree of acceleration rate." The horizontal axis is the acceleration / deceleration rate, and the vertical axis is the degree of conformity.

Membership function A ₁₂ shows a "large degree of material tension". The horizontal axis is the tension, and the vertical axis the correction factor so as to correct an error of the "larger amount" than the detected rotation speed of the actual material through Itacho of membership functions B ₁ is fit measuring roller To set.

Here, the degree of conformity of the acceleration rate of the membership function A _11, by comparing the degree of conformity tension with the membership function A _12, to cut the membership function B ₁ with the value of adaptability smaller. Cut membership function B ₁
The center of gravity of the α coordinates of the graphic is the correction factor which is inferred by the fuzzy control rules R ₁ in.

Fuzzy control rules R ₂ membership functions A ₂₁ returns material wound showing the "large degree of acceleration rate." The horizontal axis is the acceleration / deceleration rate, and the vertical axis is the degree of conformity.

Membership function A ₂₂ shows a "small degree of material tension". The horizontal axis is the tension, and the vertical axis the correction factor so as to correct an error of the "somewhat larger amount" than the detected rotation speed of the actual material through Itacho of membership functions B ₂ is a goodness of fit measure roll Is set.

Here, the fitness of the membership function A _{21 for} a certain acceleration rate and the fitness of the membership function A _{22 for} a certain tension are compared, and the membership function B ₂ is cut with the smaller fitness value. Cut membership function B ₂
The center of gravity of the α coordinates of shapes becomes a correction factor which is inferred by the fuzzy rule R _2.

Fuzzy control rules R ₃ membership functions A ₃₁ returns material wound showing the "large degree of deceleration rate." The horizontal axis is the acceleration / deceleration rate, and the vertical axis is the degree of conformity.

Membership function A ₃₂ shows a "large degree of material tension". The horizontal axis is the tension, and the vertical axis the correction factor so as to correct an error of the "slightly smaller minute" than the detected rotation speed of the actual material through Itacho of membership functions B ₃ is fit measuring roller Is set.

Here, the degree of conformity of deceleration rate with a membership function A _31, by comparing the degree of conformity tension with the membership function A _32, to cut the membership function B ₃ at the value of the fitness of the smaller. Cut membership function B ₃
The center of gravity of the α coordinates of shapes becomes a correction factor which is inferred by the fuzzy rules R _3.

Fuzzy control rules R ₄ membership functions A ₄₁ returns material wound showing the "large degree of deceleration rate." The horizontal axis is the acceleration / deceleration rate, and the vertical axis is the degree of conformity.

The membership function A ₄₂ indicates “the degree of low material tension”. The horizontal axis is the tension, and the vertical axis is the degree of conformity. Membership function B is _{4 which} is a correction factor that corrects the error of “the amount that the detected rotation speed of the measurement roll becomes smaller than the actual material passing length”. Is set.

Here, the degree of conformity of deceleration rate with a membership function A _41, by comparing the degree of conformity tension with the membership function A _42, to cut the membership function B ₄ in the value of the fitness of the smaller. Cut membership function B ₄
The center of gravity of the α coordinates of shapes becomes a correction factor which is inferred by the fuzzy rules R _3.

Membership functions B ₁ , B ₂ , B ₃ , B cut by the above-described fuzzy control rules R ₁ , R ₂ , R ₃ , R ₄ and indicating a correction rate
The α-coordinate of the center of gravity of the figure of the membership function B ₀ created by superimposing ₄ is the fuzzy control rule R ₁ , R ₂ ,
It becomes the rotational speed detection error correction rate of the measurement roll inferred by R ₃ and R ₄ .

Next, referring to FIG. 2 as an example, the material rewinding acceleration / deceleration rate a is a ₁
, And the and when the material tension T is T _1, illustrating a process for obtaining the rotation speed detection error compensation factor alpha ₁ measurement roll.

Inference by Fuzzy Control Rule R _{1 When the} material rewind acceleration / deceleration rate a is a ₁ , the fitness calculated by the membership function A ₁₁ is ω ₁ . Fitness obtained by the membership function A ₁₂ when the material tension T is T ₁ is omega _2.

In this example, since ω ₁ <ω ₂ , the membership function B ₁ is cut at the value of ω ₁ , so that the hatched portion of B ₁ is the rotational speed detection error of the measurement roll inferred by the fuzzy rule R _1. It becomes a membership function meaning the correction rate.

When fuzzy control rules R ₂ by inference material unwinding deceleration rate a is a _1, the fitness obtained by the membership function A ₂₁ is omega _3. Fitness obtained by the membership function A ₂₂ when the material tension T is T ₁ is omega _4.

In this example, since ω ₃ <ω ₄ , the membership function B ₂ is cut at the value of ω ₄ , so that the hatched portion of B ₂ is the rotational speed detection error of the measurement roll inferred by the fuzzy rule R _2. It becomes a membership function meaning the correction rate.

When fuzzy control rules R ₃ by inference material unwinding deceleration rate a is a _1, the fitness obtained by the membership function A ₃₁ is zero.

Accordingly, the membership function indicating the rotational speed detection error correction rate measuring roller inferred by the fuzzy rules R ₃ is absent.

When fuzzy control rules R ₄ by inference material unwinding deceleration rate a is a _1, the fitness obtained by the membership function A ₄₁ is zero.

Accordingly membership function indicating the rotational speed detection error correction rate measuring roller inferred by the fuzzy rule R ₄ is absent.

Thus, in this example, fuzzy control rules and the hatched portion of the membership functions B _1, which means the rotational speed detection error correction rate measuring roller inferred by R _1, measuring roll rotation speed inferred by the fuzzy control rules R ₂ Α of the center of gravity of the figure of the membership function B ₀ created by overlapping the hatched part of the membership function B ₂ meaning the detection error correction rate
Coordinates, when the deceleration rate a = a ₁ and the tension T = T _1, the rotational speed detection error correction factor measuring roller.

Note that the membership functions A ₁₁ , A ₁₂ , A ₂₁ , A ₂₂ , A ₃₁ , A ₃₂ , A
The figures ₄₁ , A ₄₂ , B ₁ , B ₂ , B ₃ , and B ₄ are not limited to those in the above-described embodiment, and may be changed to more shapes as needed.

In addition, the number of the membership functions A ₁₁ , A ₂₁ , A ₃₁ , and A ₄₁ indicating the magnitude of the material rewind acceleration / deceleration rate may be appropriately increased or decreased, and similarly, the magnitude of the material tension may be reduced. The number of the meaningful membership functions A ₁₂ , A ₂₂ , A ₃₂ , and A ₄₂ can be increased or decreased.

Further, in the above embodiment, the coil diameter calculating device applied to the unwinder has been described. However, the present invention is not limited to this, and may be applied to a winder for winding a material of a continuous processing line. it can.

〔The invention's effect〕

As is apparent from the above description, according to the present invention, the rotational speed detection error correction rate of the measuring roll is determined by fuzzy inference based on the material rewinding (or winding) acceleration / deceleration rate and the material tension due to a change in operating conditions. Since the calculated coil diameter is corrected by this correction rate, even if slippage occurs between the material and the measurement roll due to a change in operating conditions, the coil diameter can be calculated accurately.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of an embodiment of the present invention, FIG. 2 is a membership function for explaining the operation of the embodiment, and FIG. 3 is a schematic configuration of a conventional coil diameter calculating device. FIG. 3 ... rewinding machine, 4 ... transmission for rewinding machine, 5 ... rewinding machine rotation speed detecting means, 6 ... coil diameter measuring roll, 7 ... measuring roll transmission, 8 ... measuring roll rotation Number detection means, 9 ...
... Coil diameter calculation means, 10 ... Acceleration / deceleration rate calculation means, 11 ...
Tension detecting means, 12 ... Fuzzy processing means.

Claims (1)

(57) [Claims] 1. The number of revolutions of a rewinding machine (or winding machine) for continuously unwinding (or winding) the material of a processing line, and downstream of the unwinding machine (or winding machine). (Or upstream) the number of rotations of the coil diameter measurement roll provided at each is detected, and the coil diameter calculation means calculates the coil diameter of the rewinding machine (or winding machine) based on each of these rotation speeds. Tension detecting means for detecting the tension of the material; acceleration / deceleration rate calculating means for calculating an acceleration / deceleration rate of material rewinding (or winding) from the detected time change rate of the rotation number of the coil diameter measuring roll; An error correction rate of the detected rotational speed of the coil diameter measuring roll is determined by fuzzy inference based on the material tension and the calculated acceleration / deceleration rate, and the calculated coil diameter of the coil diameter calculating means is supplemented by the error correction rate. Coil diameter arithmetic apparatus characterized by comprising a fuzzy processing means for.