JPH08226811A - In-line continuous measurement device for rate of change in web length and width - Google Patents

Abstract

PURPOSE: To obtain a rate or change in web length and width by providing measuring points on upstream and downstream sides of a web to be transferred with a pulse generator which converts the rotation of a transfer roll into pulse. CONSTITUTION: An in-feed roll 2 transferring a web 1 is connected to a motor 4 and a pulse generator 5. In the pulse generator 5 on upstream side measuring point, a slit plate is rotated as the web 1 is transferred so that pulse is generated. The web processed at a processing part 10 is fed to an out-feed roll 3. At downstream side measuring point, pulse is also generated by a similar pulse generator 15. Meanwhile, the transfer velocity of the web 1 when passing the upstream side measuring point is measured and stored to a memory 7, and that at passing the downstream side measuring point is measured. Then the measured data at the downstream side measuring point and that at the upstream side measuring point read out of the memory 7 are fetched for calculation, so that rate of change in length and width of the web 1 are found.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-line continuous measuring apparatus for measuring rate of change of length and width of a web.

[0002]

2. Description of the Related Art When a web is subjected to some treatment, its width and length are changed. Conventionally, the dimension change rate was calculated by individually measuring the dimensions before and after the treatment. In this way, individual differences tend to occur, and also
There was a delay in time, which hindered the improvement of web productivity.

For example, in the case of a laminate composed of a copper plate and a plastic film, copper etching is performed to measure the change in the length of the plastic film. In this case, the measurement result is obtained 4 hours after the sample collection. Therefore 4
It is expected that production will be stopped for an hour or product loss will occur for four hours.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to continuously measure a dimensional change rate before and after a treatment while subjecting a web to the treatment, and to continue the treatment. An object of the present invention is to provide an in-line continuous measuring device for web length and width change rate.

[0005]

According to the present invention, firstly, a first pulse generating means for converting the rotation of a first transfer roll at a measurement point on the upstream side of a transferred web into a pulse, and a first web of the transferred web. Second pulse generating means for converting the rotation of the second transfer roll at the downstream measuring point into a pulse, web length data obtained from the pulse of the first pulse generating means and stored between the upstream and downstream measuring points Is obtained from the synchronizing means for simultaneously capturing the web length data obtained from the pulse of the second pulse generating means after counting the number of pulses corresponding to the web path length of the first pulse generating means and the first pulse generating means captured by the synchronizing means. A web length comprising a calculation means for obtaining a rate of change in the length direction based on the web length data and the web length data obtained from the second pulse generating means. It is an in-line continuous measuring device for the rate of change.Secondly, upstream side measuring means for measuring the web width at the upstream measuring point of the transferred web, and measuring the web width at the downstream measuring point of the transferred web. Downstream measuring means, measured by the downstream measuring means after counting the pulse number corresponding to the web width data measured and stored by the upstream measuring means and the web path length between the upstream and downstream measuring points Synchronous means to capture the web width data at the same time,
And an in-line continuous measuring device for the rate of change of web width, which comprises arithmetic means for obtaining the rate of change of web width from the respective web width data measured by the upstream side measuring means and the downstream side measuring means fetched by the synchronizing means. is there.

Thirdly, there is an in-line continuous measuring device for web length and width change rate, which is equipped with the above-mentioned two in-line continuous measuring devices at the same time.

[0007]

[Function] For a web whose length and width change during the transfer between the upstream measurement point and the downstream measurement point, the web transfer speed and the web width at the time when any part of the web passes the upstream measurement point are determined. Measure and store each in memory. Further, the web transfer speed and the web width are measured again at the time when the arbitrary part of the web will pass the downstream measurement point. Then, the measurement data at the downstream measurement point and the measurement data at the upstream measurement point read out from the memory for the same location on the web are fetched (this is referred to as synchronization) to perform an operation, so that the measurement between the two measurement points is performed. The rate of change of web length and width can be determined.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A description will be given below with reference to the drawings.

First, the in-line continuous measurement of the web length change rate will be described. FIG. 1 is a block diagram showing the configuration of an in-line continuous measuring apparatus for the rate of change in web length.

The web 1 is supplied to the infeed roll 2 at the upstream measurement point A via the first tension sensor.

The first pulse generating means will be described.
The infeed roll 2 for transferring the web is connected to the electric motor 4 and the pulse generator 5. The pulse generator 5 is a well-known photoelectric rotation detector including a slit plate, a light projecting section, and a light receiving section. The infeed roll 2 is rotated by the electric motor 4, and the slit plate having a plurality of small holes on the same circumference also rotates at the same time. When the slit plate rotates with the transfer of the web, a slit passing between the light projecting unit and the light receiving unit passes in proportion to the number of rotations, so that a pulse is generated. The number of count pulses in this infeed roll 2 is A. The pulse number A represents the feed length of the web 1 at the upstream measurement point A per unit time.

The web 1 which has passed through the infeed roll 2
Is processed by the processing unit 10. The processed web 1 is supplied to the outfeed roll 3 at the downstream measurement point B via the second tension sensor. Also at the downstream side measurement point B, a second pulse generating means similar to the first pulse generating means is provided, and the slit plate is rotated along with the transfer of the web in the same manner as described above, so that the distance between the light emitting portion and the light receiving portion is increased. A pulse is generated because a slit proportional to the number of revolutions passes through. The count pulse number B here is the downstream measurement point B.
Represents the feed length of the web 1 per unit time.

Next, the synchronization for simultaneously taking in the measured values at the upstream and downstream measurement points regarding an arbitrary portion of the web will be described.

First, the web path length L transferred between the upstream measurement point A for measuring the unprocessed web length and the downstream measurement point B for measuring the processed web length is measured. Assuming that the radius of the infeed roll 2 is r ₁ and k pulses are detected per one rotation of the roll 2, the same portion of the web after the length is measured at the upstream measurement point A The elapsed time until the length is measured at the downstream side measurement point B is obtained from the number of pulses N = kL / (2 × circular ratio × r ₁ ) corresponding to the path length L of the web.

After counting (elapsed) the number of pulses N,
An arbitrary portion of the web that has passed the upstream measurement point will further pass the downstream measurement point. Therefore, the length is measured when an arbitrary portion of the web passes the upstream measurement point A, the measured value is temporarily stored, and then the length is measured when the same portion passes the downstream measurement point B after counting the pulse number N. If measurements are taken and two measurements taken simultaneously, synchronized data can be obtained for the same location on the web.

Specifically, for example, the total length L between the upstream measurement point and the downstream measurement point is set to 3563 mm, and the number N of pulses peculiar to the apparatus generated during the transfer of the web during this period is 16
7082 pulses. CCD for width measurement described later
The sum of the camera scanning time, the width of the web, the calculation output time for obtaining the change rate, etc. is 130.4 msec. If the maximum web speed Vmax is 10 m / min, the web travels the shortest time along the entire length L. Time is 21.378
sec. In this case, the measurement interval (sampling)
Is 167082 ÷ 21.378 × 130.4 × 10 ⁻³ =
It must be 1019.2 pulses or more, and the measurement interval is 1100 pulses (converted to a web length of about 2
3.5 mm / pulse).

1100 after starting the first measurement on the upstream side
Sampling measurement is performed for each pulse, and the data is stored in the data memory. This data increments the storage address by one each time the next data comes in. The upstream data that was imported is 152 data (167082/1100)
When ≈152) is reached, sampling measurement is also performed on the downstream side. The first raw data on the downstream side and the data at address 152 of the data memory (the first data on the upstream side) are fetched together to calculate the web width change rate. Similarly, downstream data measured every 1100 pulses and upstream data (data at address 152 in the data memory) corresponding to the downstream data may be simultaneously captured. As means for achieving such synchronization, a shift register may be used for the data memory 7 or the like.

Next, the rate of change in the lengthwise direction is calculated from the pulse number A obtained from the rotation of the infeed roll 2 and the pulse number B obtained from the rotation of the outfeed roll 3 by using a calculating means. The equation for obtaining the rate of change in the length direction is the rate of change in the length direction = (BA) / A. The number of pulses A and the number of pulses B for the same portion of the web are substituted into this equation to obtain the length change rate. The number of pulses A, the number of pulses B, and the rate of change in the length direction are recorded in a recorder.

Since the number of pulses A and the number of pulses B here are continuously measured, the rate of change in the length direction can also be continuously determined.

Next, the in-line continuous measurement of the web width change rate will be described.

FIG. 2 is a block diagram showing the construction of an in-line continuous measuring apparatus for the rate of change of web width.

The web 1 is supplied to the infeed roll 2 via the first tension sensor. As a means for measuring the width of the web before processing, CCD cameras 2 are provided at both ends of the web.
1, 22 are provided, and the web width W ₁ at the upstream measurement point is measured.

The web width W ₁ is the sum of the measured value (dark level bit number) of the CCDA ₁ camera 21, the measured value (dark level bit number) of the CCDA 2 camera 22 and the offset value (distance between two CCD cameras). is there. The resolution of the CCD camera is 6 μm / bit ,. The CCD 21 camera measurement value is 2080 bits, and the CCD camera 22 measurement value is 20
00 bits and the offset value are 217.430 mm. The web width W ₁ is W ₁ = (2080 +2000) × 0.006 +217.430 = 241.91 m
m is required.

The web passing through the infeed roll 2 is processed by the processing section 10. After that, the web 1 is supplied to the outfeed roll 3 via the second tension sensor, as described above.

Next, the synchronization for simultaneously capturing the measured values at the upstream and downstream measurement points regarding an arbitrary portion of the web is similar to the case of obtaining the rate of change of the web length, and will therefore be briefly described. To do.

Specifically, the web width W ₁ is sampled and measured at the upstream measurement point every 1100 pulses and sequentially stored in the data memory 27. This data increments the storage address by one each time the next data comes in. When the number of upstream data taken in is 152, the web width W ₂ is measured also on the downstream side. The web width W ₂ here is obtained by the above-mentioned method similar to the web width W ₁ . The raw data measured on the downstream side and the data at address 152 of the data memory (the first data on the upstream side) are fetched together to calculate the web width change rate. Similarly, 11
The downstream data captured every 00 pulses and the corresponding upstream data (data at address 152 of the data memory) are captured at the same time.

Next, the rate of change in the web width direction is obtained from the web width W ₁ at the upstream measurement point and the web width W _{2 at the} downstream measurement point using a calculating means. The expression for obtaining the width direction change rate is the width direction change rate = (W ₂ −W ₁ ) / W ₁ . In this formula, the web width W at the same position on the web
Substituting ₁ and the web width W ₂ to obtain the width change rate. The web width W ₁ , the web width W ₂ and the rate of change in the width direction are recorded by a recorder.

Since the web width W ₁ and the web width W ₂ here are continuously measured, the width direction change rate can also be continuously calculated.

By combining the in-line continuous measuring device for changing the web length and the in-line continuous measuring device for changing the web width as described above, the web length and the changing ratio of the width can be continuously determined in-line at the same time. .

[0030]

EFFECT OF THE INVENTION It is possible to continuously calculate the dimensional change rate before and after the web is subjected to some treatment and to continue the treatment. Specifically, the rate of change of the plastic film can be continuously and automatically measured while the laminate comprising the copper plate and the plastic film is being treated, and the treatment operation can be continued.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an in-line continuous measuring device for a rate of change in web length.

FIG. 2 is a block diagram showing a configuration of an in-line continuous measuring device for a web width change rate.

[Explanation of symbols]

1 web 2 infeed roll 3 outfeed roll 4 motor A 5 pulse generator A 6 counter A 7 memory 8 length change rate calculator 9 recorder 10 processing unit 14 motor B 15 pulse generator B 16 counter B 21 A1 camera 22 A2 camera 23 B1 camera 24 B2 camera 25 W ₁ calculator 26 W2 calculator 27 memory 28 width change rate calculator 29 recorder

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koichi Oishi 2-1, Tango-dori, Minami-ku, Aichi Prefecture Nagoya Mitsui Toatsu Chemical Co., Ltd.

Claims (3)

[Claims] 1. A first pulse generating means for converting the rotation of a first transfer roll at a measurement point on the upstream side of a transferred web into a pulse, and a rotation of a second transfer roll at a measurement point on the downstream side of a transferred web. A second pulse generating means for converting into a pulse, the web length data obtained from the pulse of the first pulse generating means and stored, the number of pulses corresponding to the web path length between the upstream and downstream measurement points. Synchronizing means for simultaneously capturing the web length data obtained from the pulse of the second pulse generating means after counting, and the web length data and the second pulse generating means obtained from the first pulse generating means captured by the synchronizing means. An in-line continuous measuring device for the rate of change of web length, which comprises a calculating means for obtaining a rate of change in the length direction based on the obtained web length data. . 2. An upstream measuring means for measuring a web width at an upstream measuring point of a transferred web, a downstream measuring means for measuring a web width at a downstream measuring point of a transferred web, and the upstream side. Simultaneously with the web width data measured and stored by the measuring means and the web width data measured by the downstream measuring means after counting the number of pulses corresponding to the web path length between the upstream and downstream measuring points. An in-line web width change rate characterized by comprising a synchronizing means for taking in and a calculating means for obtaining a web width changing rate from respective web width data measured by the upstream measuring means and the downstream measuring means taken in by the synchronizing means. Continuous measuring device. 3. A first pulse generating means for converting the rotation of the first transfer roll at a measurement point on the upstream side of the transferred web into a pulse, an upstream measuring means for measuring the web width, and a transferred web. The second pulse generating means for converting the rotation of the second transfer roll at the downstream side measurement point into a pulse, and the downstream side measuring means for measuring the web width, and the value obtained from the pulse of the first pulse generating means and stored. The web length data and the web length data obtained from the pulse of the second pulse generation means after simultaneously counting the number of pulses corresponding to the web path length between the upstream side and the downstream side measurement points are taken in at the same time, and The web width data measured and stored by the upstream measuring means and the number of pulses corresponding to the web path length between the upstream and downstream measuring points are counted and then measured by the downstream measuring means. Synchronizing means for simultaneously taking in the obtained web width data, and a change in the longitudinal direction based on the web length data obtained by the first pulse generating means and the web length data obtained by the second pulse generating means, which are fetched by the synchronizing means. Web length and width, which comprises a calculating means for obtaining a rate and a web width change rate from the respective web width data measured by the upstream side measuring means and the downstream side measuring means taken in by the synchronizing means. In-line continuous measuring device for rate of change.