CN202715655U - System for precisely determining coil diameter value of strip steel coiling machine - Google Patents

Abstract

The utility model discloses a system for precisely determining a coil diameter value of a strip steel coiling machine. The system comprises a thickness measuring instrument arranged on the front part of a turning roll of the coiling machine and used for detecting the thickness of strip steel, a speed meter arranged on one side of the strip steel and used for detecting the real-time speed of the strip steel, a first pulse encoder arranged on the turning roll and used for measuring the real-time turning speed of the turning roll and the current turning angle of the turning roll, a second pulse encoder arranged on a transmission motor of the coiling machine and used for measuring the real-time turning speed of the turning roll and the current turning angle of the turning roll, a coil diameter measuring device arranged on the coiling machine and used for measuring the current coil diameter value, and a PLC (Programmable Logic Controller) which is respectively connected with the components and used for calculation according to parameters output by the components to obtain the actual coil diameter value. The system disclosed by the utility model has high stability, is slightly influenced by the external environment, and is high in measurement precision.

Description

A kind of system that accurately determines power reel coil diameter value

Technical field

The utility model relates to a kind of system for determining the coil diameter value, particularly a kind of system for accurately determining the coil diameter value on the power reel.

Background technology

When the band steel was produced, in order to guarantee the quality of finished steel coils, the constant tension force control of coiling machine was crucial, in order accurately to control tension force, determined that accurately the coil diameter value is the core of control.

Usually the coil diameter computational methods that adopt at present, to calculate coil diameter according to the diameter value with linear velocity, thickness and the mandrel for recoiling machine of steel, after coil diameter is calculated beginning, reel whenever turns around, then coil diameter band steel average thickness according to 2 times on Shang Yiquan coil diameter basis increases progressively, the coil diameter that this mode is calculated is not skidded by slewing rollers and the impact of coil diameter off-centre, is the basis of follow-up accurate Calculation coil diameter.But the coil diameter value that can not directly belt steel thickness be calculated is as final actual coil diameter, because it and actual value have larger deviation, reason comprises: initial coil diameter inaccuracy, belt steel thickness inaccuracy, do not batch tight etc. and other factors, therefore must revise the coil diameter value that belt steel thickness calculates.

Can make according to the equipment of installing on the rolling line and to obtain in several ways coiling machine coil diameter value, the one, can be by calculating with the proportionate relationship of steel wire speed and coiling machine rotating speed, the coiling machine rotating speed can obtain by batching the pulse coder of installing on the driving motor, can convert by the rotating speed of laser velocimeter or slewing rollers with steel wire speed.The unit of in addition budget abundance can also be installed ultrasonic wave measurement of film reel diameter device and directly measure coiling machine coil diameter value, these convert according to measurement mechanism or the coil diameter value that directly measures to compare the coil diameter value that belt steel thickness calculates more accurate, can be used for the coil diameter value of correction tape steel THICKNESS CALCULATION.But measure the interference that coil diameter is subject to extraneous factor easily, the site environment more complicated, may be eccentric such as coil of strip center of gravity that slewing rollers skid, batch occurring, dust steam may affect precision of ultrasonic measurement etc., measurement device also might break down in addition, so the coil diameter value of measuring must be carried out verification.Only have the effective coil diameter value by verification just can be used for THICKNESS CALCULATION coil diameter value is revised synchronously.

The utility model content

The technical problems to be solved in the utility model provides a kind of system that uses definite power reel coil diameter value that multiple measurement mechanism revises synchronously to the coil diameter calculated value, to obtain accurate coiling machine coil diameter value.

In order to solve the problems of the technologies described above, the utility model provides a kind of system that accurately determines power reel coil diameter value, comprising:

Be arranged at the calibrator of the slewing rollers front portion of coiling machine, for detection of the thickness with steel;

Be arranged at the tachymeter with steel one side, for detection of the real-time speed with steel;

Be installed on the first pulse coder on the described slewing rollers, work as the angle that is forwarded to for the real-time rotate speed of measuring slewing rollers and slewing rollers;

Be arranged at the second pulse coder on the driving motor of coiling machine, be used for measuring the real-time rotate speed of driving motor and when the angle that be forwarded to;

Be installed on the measurement of film reel diameter device on the described coiling machine, be used for measuring current coil diameter value;

The PLC controller, be connected with described calibrator, tachymeter, the first pulse coder, the second pulse coder and measurement of film reel diameter device respectively, be used for calculating the coil diameter actual value according to the parameter of described calibrator, tachymeter, the first pulse coder, the second pulse coder and the output of measurement of film reel diameter device.

Further, described tachymeter is laser velocimeter.

Further, described measurement of film reel diameter device is ultrasonic wave measurement of film reel diameter device.

The beneficial effects of the utility model are:

1, combine calculating coil diameter and measurement coil diameter advantage separately to obtain accurate coil diameter value, calculating coil diameter precision is not high but stable height is subjected to the impact of external environment very little; Measure coil diameter and be subjected to the impact of external interference large but certainty of measurement is high, pass through behind the validity check the well error of corrected Calculation coil diameter, finally obtain high-precision coiling machine coil diameter value.

2, used two level and smooth coil diameter error amounts of ramp generator and coil diameter actual value, the final like this coil diameter value that obtains is the amount that a continuously smooth changes, and step can not occur change.

Description of drawings

Fig. 1 is the system schematic of accurately determining power reel coil diameter value of the present utility model.

Fig. 2 is the operation schematic diagram calculation of PLC controller in the utility model.

The specific embodiment

The utility model is described in further detail below in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the utility model and being implemented, but illustrated embodiment is not as to restriction of the present utility model.

Operation principle of the present utility model is: in the time of the coiling machine coiling band steel, coiling machine whenever revolves and turns around, and then coil diameter increases 2 times belt steel thickness mean value.Belt steel thickness calculates the coil diameter device can obtain a calculating coil diameter value according to this method, and this coil diameter value is the basis of follow-up accurate Calculation coil diameter value.

If be equipped with laser velocimeter, then the linear velocity actual value with steel can accurately measure; The pulse coder of installing on the Coiler driving device motor simultaneously can obtain the rotary speed actual value of reel-motor, can converse the coiling machine rotary speed actual value according to gear ratio.According to then obtaining coiling machine coil diameter value with steel wire speed with the equation that the coiling machine linear velocity equates;

If be equipped with ultrasonic wave measurement of film reel diameter device, then can directly record coiling machine coil diameter value;

If pulse coder has been installed on the slewing rollers, then can obtain the angle actual value of slewing rollers; The pulse coder of installing on the Coiler driving device motor simultaneously can obtain the angle actual value of reel-motor, can converse coiling machine angle actual value according to gear ratio, the slewing rollers diameter is known definite value again, according to equaling can obtain coiling machine coil diameter value with the length of steel on the coiling machine with steel length by slewing rollers;

Above-mentioned three kinds of modes are asked for coiling machine coil diameter value and have been used three kinds of measurement mechanisms, and the coil diameter primary system of trying to achieve is called the measurement coil diameter, measure coil diameter precision height but are subject to site environment and disturb, and must pass through validity check.Here verification measurement coil diameter value whether in effective range, whether the average of some circle coil diameter increments and variance only have the measurement coil diameter value of having passed through validity check just can be used for calculating synchronously the coil diameter value in effective range.According to the precision of measurement mechanism, first-selected ultrasonic wave measurement of film reel diameter coil diameter value, secondly strip speed calculates the coil diameter value, and last slewing rollers angle calculation coil diameter value is chosen the synchronous coil diameter of a kind of conduct from three kinds of measurement coil diameter values.

The every triple turn of coiling machine sends a lock-out pulse, it is synchronous to carry out a coil diameter, namely use high-precision measurement coil diameter correction tape steel THICKNESS CALCULATION coil diameter value, in order so that revise rear coil diameter value the step variation not to occur, used the first ramp generator to come level and smooth synchronously coil diameter error.

After this subsynchronous coil diameter is finished, coiling machine continues in the process of triple turn, the mode that increases 2 times of belt steel thickness according to every circle coil diameter value is calculated the coil diameter actual value, for so that the coil diameter value change continuously, with the next level and smooth coil diameter actual value of the second ramp generator, its ramp time parameter need to calculate according to coiling machine rotating speed and belt steel thickness, so that the coil diameter actual value just in time increases 2 times of belt steel thickness in coiling machine revolves the time of turning around.Carry out in the same way next time synchronous coil diameter behind the coiling machine triple turn, loop like this until this coil batches complete.

Fig. 1 is the schematic diagram of accurately determining the system of power reel coil diameter value of the present utility model, batched by coiling machine 9 after being with steel by slewing rollers 3, calibrator 1 is installed before the slewing rollers is used for detecting thickness with steel, laser velocimeter 2 also is installed is used for detecting real-time speed with steel; Slewing rollers are driven voller, if neglect the impact of skidding, then its linear velocity is consistent with band steel wire speed, and pulse coder 4 is installed on the slewing rollers, both can measure the real-time rotate speed of slewing rollers, can also record slewing rollers when the angle that is forwarded to; Coiler driving device motor 7 rotates through gear-box 8 rear drive coiling machines, and pulse coder 6 also is installed on the reel-motor, both can measure the real-time rotate speed of driving motor, also can record driving motor when the angle that is forwarded to; Ultrasonic wave measurement of film reel diameter device 10 is installed on the coiling machine, can measures current coil diameter value by Real-time Measuring; All real-time detected values finally all pass into PLC controller 5, are processed by the PLC controller, obtain the coil diameter actual value.

Wherein, these coil diameter computational methods of processing of PLC may further comprise the steps:

1. cumulative belt steel thickness obtains coil diameter value D _Thick:

Coiling machine whenever forwards a fixing angle to and sends a coiling machine position pulse, and the expression coiling machine revolves and makes a circle.Between twice position pulse, sample strip steel one-tenth-value thickness 1/10 is also asked for its mean value; Then whenever receive the one-time positioning pulse, add that on upper circle coil diameter basis 2 times of belt steel thickness mean values obtain this circle coil diameter value, are specially:

(1) coiling machine whenever revolves to turn around and produces the coiling machine position pulse PU in a sampling period _Round:

On the Coiler driving device motor pulse coder is installed, can determine the angle of the current rotation of coiling machine according to its reading, whenever coiling machine forwards a fixing angle to, then produce a coiling machine position pulse, pulse duration is a sampling period of programmable logic controller (PLC) (PLC), for example is 4ms.

(2) between twice coiling machine position pulse, sample strip steel one-tenth-value thickness 1/10 is also asked for its mean value

In coiling machine rotates the time of n circle, the belt steel thickness value h of all samplings of suing for peace _s, and the one-tenth-value thickness 1/10 number of summation sampling, being divided by just obtains the mean value that coiling machine rotates n astragal steel thickness

(3) whenever receive a pulse signal PU _Round, cumulative belt steel thickness calculates coil diameter value D _Thick:

$\left\{\begin{array}{cc}{D}_{\mathrm{thick}}\left(n\right)=D_{\mathrm{thick}}(n-1)+2\×\stackrel{\‾}{h_s\left(n\right)}& 1\≤n\≤M1\\ D_{\mathrm{thick}}\left(0\right)=D_{\mathrm{ini}}& \end{array}\right.$

In the formula, D _ThickThe coil diameter value of calculating for cumulative belt steel thickness; N represents the current coiling machine position pulse number of receiving; M1 is the maximum number of turns of coiling machine rotation; D _IniInitial diameter when not having the upper coil of strip of volume for coiling machine;

2. obtain the coil diameter value according to rotating speed, angle measurement unit and measurement of film reel diameter device, and by obtaining synchronous coil diameter value D behind the validity check _Sync:

The strip speed of measuring according to laser velocimeter, the coil diameter value of ultrasonic wave measurement of film reel diameter measurement device, angle that the slewing rollers pulse coder records and batch the angle value that the driving motor pulse coder records and to obtain respectively three kinds of coil diameter values, be referred to as the measurement coil diameter, three kinds of coil diameter values all will be passed through validity check, then choose the wherein synchronous coil diameter of a kind of conduct, be specially:

(1) strip speed of measuring according to laser velocimeter calculates coil diameter value D _Laser, and ask for the coil diameter increment Delta D of each circle _Laser

$D_{\mathrm{laser}}=\frac{S_s}{\mathrm{\π}\×n_{\mathrm{coiler}}/i_{\mathrm{coiler}}}$

ΔD _laser(n)＝D _laser(n)-D _laser(n-1)

In the formula, D _LaserBe the coil diameter value that calculates according to strip speed; S _sBe strip speed, obtained after smoothing processing by the laser velocimeter measuring-signal; n _CoilerBe the Coiler driving device motor speed, measured by the pulse coder of installing on the driving motor; i _CoilerBe the gear ratio between driving motor and the coiling machine; Δ D _LaserIncrement for every circle coil diameter; N represents the current coiling machine position pulse number of receiving;

(2) directly measure coil diameter value D according to ultrasonic wave measurement of film reel diameter device _Ulsonic, and ask for the coil diameter increment Delta D of each circle _Ulsonic:

ΔD _ulsonic(n)＝D _ulsonic(n)-D _ulsonic(n-1)；

(3) according to the residing angle calculation coil diameter of slewing rollers value D _Defl, and ask for the coil diameter increment Delta D of each circle _Defl:

$D_{\mathrm{defl}}=\frac{(A_{\mathrm{defl}}-A_{\mathrm{defl}}\left(k\right))\×d_{\mathrm{df}}}{(A_{\mathrm{coiler}}-A_{\mathrm{coiler}}\left(k\right))/i_{\mathrm{coiler}}}$

ΔD _defl(n)＝D _defl(n)-D _defl(n-1)

In the formula, A _DeflWhen rotating between k～k+1 circle for coiling machine, the angle actual value of slewing rollers; A _Defl(k) be the slewing rollers angle of preserving when receiving k coiling machine position pulse; d _DfDiameter value for slewing rollers; A _CoilerWhen rotating between k～k+1 circle for coiling machine, the angle actual value of reel-motor; A _Coiler(k) be the reel-motor angle value of preserving when receiving k coiling machine position pulse; i _CoilerFor batching the gear ratio between driving motor and the coiling machine;

(4) the mean value A of the coil diameter increment size that obtains of three kinds of modes of statistics _{Δ D}With variance S _{Δ D}

$A_{\mathrm{\ΔD}}=\frac{1}{a}\underset{i=1}{\overset{a}{\mathrm{\Σ}}}\mathrm{\ΔD}$

$S_{\mathrm{\ΔD}}=\frac{1}{a-1}\underset{i=1}{\overset{a}{\mathrm{\Σ}}}{(\mathrm{\ΔD}-A_{\mathrm{\ΔD}})}^2$

In the formula, A _{Δ D}Mean value for a circle coil diameter increment size; Δ D is a kind of in the coil diameter increment size that obtains of three kinds of modes; S _{Δ D}Variance for a circle coil diameter increment size;

(5) validity of the coil diameter value that obtains of three kinds of modes of verification, and therefrom choose a synchronous coil diameter D of conduct _Sync:

Judge that at first respectively the coil diameter value of three kinds of modes is whether in effective range, then judge that some circle coil diameter increment averages of three kinds of modes and variance are whether in effective range, if the coil diameter value that certain mode obtains has exceeded effective range, then choose the coil diameter value that alternate manner obtains.According to the precision of measurement device, the coil diameter value D that first-selected ultrasonic wave measurement of film reel diameter device records _UlsonicThe coil diameter value D that next adopts the laser velocimeter measuring-signal to calculate _LaserThe coil diameter value D that adopts at last the slewing rollers rotating speed to calculate _DeflFinally from the coil diameter value that three kinds of modes obtain, select a conduct to be used for synchronous coil diameter value D according to above-mentioned priority _SyncIf the coil diameter value that three kinds of modes obtain all is invalid through check, can't revise synchronously so, coiling machine coil diameter value is by belt steel thickness calculated value D _ThickDetermine;

3. use synchronous coil diameter value D _SyncSynchronous correction tape steel THICKNESS CALCULATION coil diameter value D _Thick, obtain revising rear coil diameter value D _Corr:

Whenever receive the coiling machine position pulse No. three times, produce a lock-out pulse PU _Sync, it is synchronous to carry out a coil diameter; Preserve the lower error DD that measures between the coil diameter stack pile calculating coil diameter when coil diameter is synchronous _Sync(k), and the summation all synchronous coil diameter error DD in front _{Sync, sum}For the step variation does not occur coil diameter value after making correction, used ramp generator 1 level and smooth synchronously coil diameter error DD _Ramp(k+1), at last synchronous coil diameter error after level and smooth is appended to the THICKNESS CALCULATION coil diameter and get on to obtain to revise rear coil diameter value D _Corr, be specially:

(1) whenever receives three subpulse PU _Round, produce the lock-out pulse PU in a sampling period _Sync:

Whenever receive the coiling machine position pulse No. three times, produce a lock-out pulse, pulse duration is the sampling period of PLC, for example is 4ms;

(2) whenever receive a lock-out pulse, calculate a subsynchronous coil diameter error DD _Sync(k), and all synchronous coil diameter errors in summation front, DD obtained _{Sync, sum}:

DD _sync(k)＝D _thick(3k)-D _sync(k)

${\mathrm{DD}}_{\mathrm{sync},\mathrm{sum}}(k-1)=\underset{i=1}{\overset{k-1}{\mathrm{\Σ}}}{\mathrm{DD}}_{\mathrm{sync}}\left(i\right)$

In the formula, DD _Sync(k) be the synchronous coil diameter error of calculating when receiving k lock-out pulse; D _Thick(3k) rotate the THICKNESS CALCULATION coil diameter that 3k encloses for coiling machine; D _Sync(k) the synchronous coil diameter value when receiving k lock-out pulse; DD _{Sync, sum}(k-1) the synchronous coil diameter error when receiving k-1 lock-out pulse with;

(3) use the level and smooth synchronous coil diameter of the first ramp generator poor, obtain the poor ramp value DD of synchronous coil diameter in k+1 synchronizing cycle _Ramp(k+1):

$\left\{\begin{array}{cc}{\mathrm{DD}}_{\mathrm{ramp}}(k+1)={\mathrm{DD}}_{\mathrm{sync},\mathrm{sum}}(k-1)+\frac{t_{k+1}}{T_{r1}}\&times;{\mathrm{DD}}_{\mathrm{sync}}\left(k\right)& 0\&le;t_{k+1}\&le;T_{r1}\\ {\mathrm{DD}}_{\mathrm{ramp}}(k+1)={\mathrm{DD}}_{\mathrm{sync},\mathrm{sum}}(k-1)+{\mathrm{DD}}_{\mathrm{sync}}\left(k\right)& T_{r1}<t_{k+1}<T_e(k+1)\end{array}\right.$

In the formula, t _K+1Be the moment in k+1 synchronizing cycle, the three required times of circle of coiling machine revolution are a synchronizing cycle, and along with coil diameter is increasing, synchronizing cycle is also more and more longer; T _R1Be the ramp generator time parameter, this parameter determines the speed degree that the slope changes, and the longer then slope of ramp time changes slower, otherwise the slope variation is faster; T _e(k+1) be the time span of k+1 synchronizing cycle; T _R1＜T _e(k+1).

The effect of the first ramp generator be exactly so that synchronously the coil diameter error amount changed to the value of this synchronizing cycle from the value slope of a upper synchronizing cycle, remain unchanged after reaching new value, like this so that coil diameter error amount smooth change avoids occuring the step variation.

(4) calculate coil diameter value D after the correction of interior each circle k+1 synchronizing cycle _Corr:

D _corr(l)＝D _ini+D _thick(l)-DD _ramp(k+1) l＝3k+1，3k+2，3k+3

Coiling machine rotation 3 circles are respectively 3k+1,3k+2 and 3k+3 circle in k+1 synchronizing cycle, and the coil diameter value is calculated according to following formula after the correction of each circle.

4. use the second ramp generator to produce continuous coil diameter actual value D _Act:

Ramp time parameter T according to belt steel thickness and coiling machine rotating speed calculating ramp generator 2 _R2Coil diameter actual value D when (n), then using ramp generator 2 generation coiling machines to rotate the n circle _Act, be specially:

4.1, the ramp time parameter T of ramp generator 2 when calculating coiling machine and rotating the n circle _R2(n):

$T_{r2}\left(n\right)=\frac{i_{\mathrm{coiler}}}{2h_s\left(n\right)\&times;n_{\mathrm{coiler}}\left(n\right)}$

In the formula, h _sBelt steel thickness actual value when (n) rotating the n circle for coiling machine is measured by calibrator; n _Coiler(n) batch the driving motor rotary speed actual value for what coiling machine rotated n when circle, measured by the pulse coder on the reel-motor;

4.2, the coil diameter actual value D when using ramp generator 2 to produce coiling machines to rotate the n circle _Act:

$\left\{\begin{array}{c}{D}_{\mathrm{act}}\left(n\right)=D_{\mathrm{corr}}(n-1)+\frac{t_n}{T_{r2}\left(n\right)}\\ D_{\mathrm{act}}\left(0\right)=D_{\mathrm{ini}}\end{array}\right.$

In the formula, D _CorrCoil diameter value after the correction during (n-1) for coiling machine rotation n-1 circle; t _nFor coiling machine rotates the interior moment of n circle; Ramp generator 2 is so that coil diameter actual value D _ActValue when being transitioned into the n circle has avoided the generation step to change the value continuously smooth when enclosing from n-1.

Through above-mentioned steps, finally obtain continuous coiling machine coil diameter actual value D _Act, exactly determined coil diameter value is that the permanent tension force control of high accuracy coiling machine provides the foundation.

Determine the system of coil diameter in the utility model as shown in Figure 2, realize in the programming of PLC controller, comprising:

Coiling machine position pulse generating means 11 produces the coiling machine position pulse PU in a sampling period for marquis when coiling machine whenever rotates to a fixed angle _RoundSampling period refers to the sampling period of PLC controller, for example is 4ms;

Average thickness computer installation 12 is used for calculating the mean value that coiling machine revolves the interior belt steel thickness that turns around

In coiling machine revolves the time of turning around, sampling and summation belt steel thickness value h _s, the number of times of simultaneously summation sampling, both are divided by and namely obtain the mean value of this astragal steel thickness

Belt steel thickness calculates coil diameter value device 13, is used for calculating a coiling machine coil diameter value D according to belt steel thickness when whenever receiving a coiling machine position pulse _Thick:

$\left\{\begin{array}{cc}{D}_{\mathrm{thick}}\left(n\right)=D_{\mathrm{thick}}(n-1)+2\&times;\stackrel{\&OverBar;}{h_s\left(n\right)}& 1\&le;n\&le;M1\\ D_{\mathrm{thick}}\left(0\right)=D_{\mathrm{ini}}& \end{array}\right.$

In the formula, D _ThickThe coil diameter value of calculating for cumulative belt steel thickness; N represents the current coiling machine position pulse number of receiving; M1 is the maximum number of turns of coiling machine rotation;

Rotate the mean value of n astragal steel thickness for coiling machine; D _IniInitial diameter when not having the upper coil of strip of volume for coiling machine.

Strip speed calculates coil diameter value device 14, and the strip speed that is used for measuring according to laser velocimeter calculates coiling machine coil diameter value D _Laser:

$D_{\mathrm{laser}}=\frac{S_s}{\mathrm{\&pi;}\&times;n_{\mathrm{coiler}}/i_{\mathrm{coiler}}}$

In the formula, D _LaserBe the coil diameter value that calculates according to strip speed; S _sBe strip speed, obtained after smoothing processing by the laser velocimeter measuring-signal; n _CoilerBe the Coiler driving device motor speed, measured by the pulse coder of installing on the driving motor; i _CoilerBe the gear ratio between driving motor and the coiling machine;

Poor device 15 is asked in the first sampling, is used for whenever receiving coiling machine position pulse PU No. one time _Round, sampling is also preserved strip speed and is calculated coil diameter value D _Laser, and ask for the poor of adjacent double sampling value:

ΔD _laser(n)＝D _laser(n)-D _laser(n-1)

In the formula, n represents the current coiling machine position pulse number of receiving;

Poor device 16 is asked in the second sampling, is used for whenever receiving coiling machine position pulse PU No. one time _Round, the coil diameter value D of sampling and preservation ultrasonic wave measurement of film reel diameter measurement device _Ulsonic, and ask for the poor of adjacent double sampling value:

ΔD _ulsonic(n)＝D _ulsonic(n)-D _ulsonic(n-1)

Slewing rollers angle calculation coil diameter value device 17 is used for according to the residing angle calculation coil diameter of slewing rollers value D _Defl:

$D_{\mathrm{defl}}=\frac{(A_{\mathrm{defl}}-A_{\mathrm{defl}}\left(k\right))\&times;d_{\mathrm{df}}}{(A_{\mathrm{coiler}}-A_{\mathrm{coiler}}\left(k\right))/i_{\mathrm{coiler}}}$

In the formula, A _DeflWhen rotating between k～k+1 circle for coiling machine, the angle actual value of slewing rollers; A _Defl(k) be the slewing rollers angle of preserving when receiving k coiling machine position pulse; d _DfDiameter value for slewing rollers; A _CoilerWhen rotating between k～k+1 circle for coiling machine, the angle actual value of reel-motor; A _Coiler(k) be the reel-motor angle value of preserving when receiving k coiling machine position pulse; i _CoilerFor batching the gear ratio between driving motor and the coiling machine;

Poor device 18 is asked in the 3rd sampling, is used for whenever receiving coiling machine position pulse PU No. one time _Round, sampling is also preserved slewing rollers angle calculation coil diameter value D _Defl, and ask for the poor of adjacent double sampling value:

ΔD _defl(n)＝D _defl(n)-D _defl(n-1)

Average variance calculation element 19 is used for the mean value A of the coil diameter increment size that three kinds of modes of statistics obtain _{Δ D}With variance S _{Δ D}:

$A_{\mathrm{\&Delta;D}}=\frac{1}{a}\underset{i=1}{\overset{a}{\mathrm{\&Sigma;}}}\mathrm{\&Delta;D}$

$S_{\mathrm{\&Delta;D}}=\frac{1}{a-1}\underset{i=1}{\overset{a}{\mathrm{\&Sigma;}}}{(\mathrm{\&Delta;D}-A_{\mathrm{\&Delta;D}})}^2$

In the formula, A _{Δ D}Mean value for a circle coil diameter increment size; Δ D is a kind of in the coil diameter increment size that obtains of three kinds of modes; S _{Δ D}Variance for a circle coil diameter increment size;

Coil diameter verification selecting arrangement 20 is also selected the wherein synchronous coil diameter value of a kind of conduct D for the coil diameter value that three kinds of modes of verification obtain synchronously _SyncJudge that at first respectively the coil diameter value of three kinds of modes is whether in effective range, then judge that the coil diameter increment average of three kinds of modes and variance are whether in effective range, if the coil diameter value that certain mode obtains has exceeded effective range, then choose the coil diameter value that alternate manner obtains.According to the precision of measurement device, the coil diameter value D that first-selected ultrasonic wave measurement of film reel diameter device records _UlsonicThe coil diameter value D that next adopts the laser velocimeter measuring-signal to calculate _LaserThe coil diameter value D that adopts at last the slewing rollers rotating speed to calculate _DeflFinally from the coil diameter value that three kinds of modes obtain, select a conduct to be used for synchronous coil diameter value D according to above-mentioned priority _SyncIf the coil diameter value that three kinds of modes obtain all is invalid through check, can't revise synchronously so, coiling machine coil diameter value is by belt steel thickness calculated value D _ThickDetermine;

Synchronous pulse generating device 21 is for generation of lock-out pulse PU _Sync, whenever receive coiling machine position pulse PU No. three times _Round, produce the lock-out pulse PU in a sampling period _SyncSampling period refers to the sampling period of PLC controller, for example is 4ms;

Coil diameter error calculating device 22 is used for whenever receiving lock-out pulse PU synchronously _SyncThe time, calculate synchronous coil diameter error DD _Sync(k), and all synchronous coil diameter error amounts in summation front, DD obtained _{Sync, sum}:

DD _sync(k)＝D _thick(3k)-D _sync(k)

${\mathrm{DD}}_{\mathrm{sync},\mathrm{sum}}(k-1)=\underset{i=1}{\overset{k-1}{\mathrm{\&Sigma;}}}{\mathrm{DD}}_{\mathrm{sync}}\left(i\right)$

In the formula, DD _Sync(k) be the synchronous coil diameter error of calculating when receiving k lock-out pulse; D _Thick(3k) rotate the THICKNESS CALCULATION coil diameter of 3k circle for coiling machine, because that revolution 3 circles just carry out a coil diameter is synchronous, so rotated the 3k circle when receiving k lock-out pulse; D _Sync(k) the synchronous coil diameter value when receiving k lock-out pulse; DD _{Sync, sum}(k-1) the synchronous coil diameter error when receiving k-1 lock-out pulse with.

The first ramp generator 23, it is poor to be used for level and smooth synchronous coil diameter, processes the synchronous coil diameter error ramp value DD that obtains in k+1 synchronizing cycle through the slope _Ramp(k+1):

$\left\{\begin{array}{cc}{\mathrm{DD}}_{\mathrm{ramp}}(k+1)={\mathrm{DD}}_{\mathrm{sync},\mathrm{sum}}(k-1)+\frac{t_{k+1}}{T_{r1}}\&times;{\mathrm{DD}}_{\mathrm{sync}}\left(k\right)& 0\&le;t_{k+1}\&le;T_{r1}\\ {\mathrm{DD}}_{\mathrm{ramp}}(k+1)={\mathrm{DD}}_{\mathrm{sync},\mathrm{sum}}(k-1)+{\mathrm{DD}}_{\mathrm{sync}}\left(k\right)& T_{r1}<t_{k+1}<T_e(k+1)\end{array}\right.$

In the formula, t _K+1Be the moment in k+1 synchronizing cycle, the three required times of circle of coiling machine revolution are a synchronizing cycle, and along with coil diameter is increasing, synchronizing cycle is also more and more longer; T _R1Be the ramp generator time parameter, this parameter determines the speed degree that the slope changes, and the longer then slope of ramp time changes slower, otherwise the slope variation is faster; T _e(k+1) be the time span of k+1 synchronizing cycle; T _R1＜T _e(k+1).

The effect of the first ramp generator be exactly so that synchronously the coil diameter error amount changed to the value of this synchronizing cycle from the value slope of a upper synchronizing cycle, remain unchanged after reaching new value, like this so that coil diameter error amount smooth change avoids occuring the step variation.

Coil diameter value calculation apparatus 24 after revising is for coil diameter value D after the correction of calculating each circle in k+1 synchronizing cycle _Corr:

D _corr(l)＝D _ini+D _thick(l)-DD _ramp(k+1) l＝3k+1，3k+2，3k+3

Coiling machine rotation 3 circles are respectively 3k+1,3k+2 and 3k+3 circle in k+1 synchronizing cycle, and the coil diameter value is calculated according to following formula after the correction of each circle.

Ramp time calculation element 25, the ramp time parameter T of the second ramp generator when rotating the n circle for the calculating coiling machine _R2(n):

$T_{r2}\left(n\right)=\frac{i_{\mathrm{coiler}}}{2h_s\left(n\right)\&times;n_{\mathrm{coiler}}\left(n\right)}$

In the formula, h _sBelt steel thickness actual value when (n) rotating the n circle for coiling machine is measured by calibrator; n _Coiler(n) batch the driving motor rotary speed actual value for what coiling machine rotated n when circle, measured by the pulse coder on the reel-motor;

The second ramp generator 26, the coil diameter actual value D when rotating the n circle for generation of coiling machine _Act:

$\left\{\begin{array}{c}{D}_{\mathrm{act}}\left(n\right)=D_{\mathrm{corr}}(n-1)+\frac{t_n}{T_{r2}\left(n\right)}\\ D_{\mathrm{act}}\left(0\right)=D_{\mathrm{ini}}\end{array}\right.$

In the formula, D _CorrCoil diameter value after the correction during (n-1) for coiling machine rotation n-1 circle; t _nFor coiling machine rotates the interior moment of n circle; The second ramp generator is so that coil diameter actual value D _ActValue when being transitioned into the n circle has avoided the generation step to change the value continuously smooth when enclosing from n-1.

The above embodiment is the preferred embodiment that proves absolutely that the utility model is lifted, and protection domain of the present utility model is not limited to this.Being equal to that those skilled in the art do on the utility model basis substitutes or conversion, all within protection domain of the present utility model.Protection domain of the present utility model is as the criterion with claims.

Claims (3)

1. a system that accurately determines power reel coil diameter value is characterized in that, comprising:

Be arranged at the calibrator of the slewing rollers front portion of coiling machine, for detection of the thickness with steel;

Be arranged at the tachymeter with steel one side, for detection of the real-time speed with steel;

Be installed on the first pulse coder on the described slewing rollers, work as the angle that is forwarded to for the real-time rotate speed of measuring slewing rollers and slewing rollers;

Be arranged at the second pulse coder on the driving motor of coiling machine, be used for measuring the real-time rotate speed of driving motor and when the angle that be forwarded to;

Be installed on the measurement of film reel diameter device on the described coiling machine, be used for measuring current coil diameter value;

The PLC controller, be connected with described calibrator, tachymeter, the first pulse coder, the second pulse coder and measurement of film reel diameter device respectively, be used for calculating the coil diameter actual value according to the parameter of described calibrator, tachymeter, the first pulse coder, the second pulse coder and the output of measurement of film reel diameter device.

2. the system that accurately determines power reel coil diameter value according to claim 1 is characterized in that described tachymeter is laser velocimeter.

3. the system that accurately determines power reel coil diameter value according to claim 1 is characterized in that described measurement of film reel diameter device is ultrasonic wave measurement of film reel diameter device.

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