JPH0533285A - Apparatus for measurign orienting direction of paper, nonwoven fabric or the like - Google Patents

Abstract

(57) [Summary] [Purpose] To enable nondestructive and accurate measurement of the fiber orientation direction in a band-shaped fiber material in a short time online. [Structure] A first light source 9 for irradiating light 8 toward one side surface of the strip-shaped fiber material 6, and a first camera 11 for enlarging one side surface of the strip-shaped fiber material 6 to a size in which the fibers can be recognized. When,
A second light source 12 which emits light 8 toward the other side surface of the belt-shaped fiber material 6 at a position facing the first camera 11,
A second camera 13 for enlarging the other side of the strip-shaped fiber material 6 to a size in which the fibers can be recognized, and image signals 14, 17 captured by the first and second cameras 11, 13 are separately imaged. Image processing signals 15 and 18 which are processed to represent the orientation direction
The first and second image processing devices 16 and 19 for obtaining the above, and the image synthesizing device 21 for synthesizing the image processing signals 15 and 18 to obtain the synthetic orientation direction S are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for measuring the orientation direction of paper, non-woven fabric and the like.

[0002]

2. Description of the Related Art Conventionally, the orientation direction of fibers in a belt-shaped fibrous material such as paper and nonwoven fabric has been obtained as follows.

That is, for example, as shown in FIG. 4, a plurality of strip-shaped samples 3 are sampled so as to spread radially around an arbitrary point 2 on the strip-shaped fiber material 1, and each of the plurality of samples 3 is sampled. A tensile test is performed, and based on the results of the tensile test, the distribution of the tensile strength in each direction of the belt-shaped fiber material 1 as shown in FIGS. 5 and 6 is obtained.

Since the strip-shaped fiber material 1 has the property of having the highest tensile strength in the fiber orientation direction,
Based on the distribution, the angle having the highest tensile strength (the angle with the line extending in the longitudinal direction of the belt-shaped fiber material 1 or the feed direction 4 as the reference line 5), for example, 0 ° in the case of FIG. 5 and the angle of FIG. 6 is used. −α ° is determined as the orientation direction of the fibers in the strip-shaped fiber material 1.

[0005]

However, when the fiber orientation direction in the strip-shaped fiber material 1 is determined based on the result of the tensile test, there are the following problems.

That is, since the tensile test is a destructive test, the strip-shaped fiber material 1 must be cut.

Further, since the tensile test is troublesome, it takes a long time until the orientation direction of the fibers of the strip-shaped fiber material 1 is known.

Therefore, the orientation direction of the fiber cannot be obtained online during the manufacturing process of the belt-shaped fibrous material 1.

The present invention has been made in view of the above-mentioned circumstances, and is a paper in which the orientation direction of fibers in a belt-shaped fibrous material can be accurately measured non-destructively and online in a short time, An object is to provide a device for measuring the orientation direction of a non-woven fabric or the like.

[0010]

According to the present invention, a first light source for irradiating light to one side of a belt-shaped fiber material and a position of the one side surface of the belt-shaped fiber material irradiated with the light can be recognized. In a first camera that captures the image as enlarged as possible, a second light source that irradiates light toward the other side surface of the belt-shaped fiber material at a position facing the first camera, and in the other side surface of the belt-shaped fiber material A second camera for enlarging the same position as the position captured by the first camera to a size where fibers can be recognized, and image signals captured by the first and second cameras are separately processed. A first and a second image processing device for obtaining an image processing signal representing the orientation direction, and an image synthesizing device for synthesizing the image processing signals from the first and second image processing devices to obtain a synthetic orientation direction. Orientation of paper, non-woven fabric, etc. characterized by having Those of the direction measuring device.

[0011]

[Function] The one side surface of the strip-shaped fiber material is irradiated with light from the first light source, and the part irradiated with the light is enlarged to a size in which the fiber can be recognized and captured by the first camera. At the position facing the camera, the other side surface of the belt-shaped fiber material is irradiated with light from the second light source, and the same position as the portion caught by the first camera is enlarged to a size in which the fiber can be recognized. Image signals captured by a camera, guided by the image signals captured by the first and second cameras to different image processing devices, and image-processed to obtain image processing signals representing the orientation direction, respectively, and the two image processing signals are image-synthesized. A synthetic orientation direction is obtained by guiding the particles to a device and synthesizing them. This makes it possible to accurately measure the fiber orientation direction of the belt-shaped fibrous material online in a short time without destroying the belt-shaped fibrous material.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 show one embodiment of the present invention. In FIG. 1, 6 is a belt-like fiber material such as paper or nonwoven fabric, and 7 is a feeding direction of the belt-like fiber material 6.

A first light source 9 such as a stroboscope that irradiates the strip-shaped fiber material 6 with light 8 is disposed on one side surface of the strip-shaped fiber material 6, and the light 8 on one side surface of the strip-shaped fiber material 6 is provided. A first camera 11 provided with a magnifying lens 10 that magnifies and captures the irradiated position to a size where fibers can be recognized is provided.

On the other hand, at a position facing the first camera 11, a second light source 12 such as a strobe for irradiating light 8 toward the other side surface of the belt-shaped fiber material 6 is provided, and
A second camera 13 provided with a magnifying lens 10 that magnifies and captures the same position on the other side of the belt-shaped fiber material 6 as captured by the first camera 11 to a size that allows fiber recognition.

Image signal 1 captured by the first camera 11
By inputting 4 and performing image processing, the fibers 20 on one side are
A first image processing device 16 for obtaining an image processing signal 15 representing the orientation direction S1 of S. (for example, the angle of the belt-shaped fiber material 6 with respect to the feeding direction 7) is provided, and the second camera 13
A second image processing device 19 is provided for inputting the image signal 17 captured in step 1 and performing image processing to obtain an image processing signal 18 representing the orientation direction S2 of the fiber 20 on the other side. The image signals 14 and 17 from the cameras 11 and 13 are shown in FIG.
The amount of light reflected by the fiber 20 is large, and the amount of light is reduced between the fibers 20 and 20 so that the amount of light is reduced.
7, the direction of the intensity of the light can be formed, so that the image processing devices 16 and 19 obtain the orientation directions S1 and S2 of the fibers 20 from the direction of the intensity of the light.

Further, the first and second image processing devices 1
An image synthesizing device 21 for determining the synthetic orientation direction S of the belt-shaped fiber material 6 with respect to the feeding direction 7 by synthesizing by inputting the image processing signals 15, 18 from 6, 19 is provided. At this time, since the image processing signals 15 and 18 are signals obtained by viewing the strip-shaped fiber material 6 from the front and back, the image synthesizing device 21 shifts one of the image processing signals 15 and 18 as shown in FIG. The image processing signals 15, 1
The signals are processed so that the positions of 8 match.

Next, the operation will be described.

With one side and the other side of the strip-shaped fiber material 6 being irradiated with the light 8 from the first and second light sources 9 and 12, the strip-shaped fiber material 6 is covered by the first and second cameras 11 and 13. To shoot from. At this time, the magnified lens 10 magnifies the photographed image so that the fiber 20 can be recognized as shown in FIG. 2, for example, about 30 to 70 times.

The respective image signals 14 and 17 captured by the first and second cameras 11 and 13 are subjected to image processing by image processing devices 16 and 19 as shown in FIGS. , S2 representing image processing signals 15 and 18, and subsequently, the image processing signals 15 and 18 are guided to the image composition device 21 to be combined to obtain a combined orientation direction S. At this time, by horizontally reversing one of the image processing signals 15 and 18 as shown in FIG. 2, the image processing signal 1 in which one side surface and the other side surface of the strip-shaped fiber material 6 are detected.
Signal processing is performed so that positions 5 and 18 are aligned.

As described above, the orientation directions S1 and S2 of the fibers 20 on the one side surface and the other side surface of the strip-shaped fiber material 6 are obtained by separately performing image processing, and the obtained orientation directions S1 and S1 of the one side surface and the other side surface are obtained. Image processed signals 15, 1 indicating S2
Since the synthetic orientation direction S is obtained by synthesizing the fiber 8, the orientation accuracy of the orientation direction can be significantly improved by measuring the orientation direction of the fiber 20 of the strip-shaped fiber material 6 from both front and back surfaces.

In FIG. 3, the image signals 14 and 17 from the cameras 11 and 13 are divided into 9 screens respectively, and the image processing device 16 and
Image orientation signals S1 'and S2' are obtained by incorporating the obtained image data in 19 and image processing signals 15 and 18 showing one orientation direction S1 and S2 respectively are obtained by synthesizing the obtained nine orientation directions S1 'and S2'. The image processing signals 15 and 18 are combined by the image combining device 21 to obtain the combined orientation direction S. By doing so, a large area can be inspected at the same time, so that an inspection with higher accuracy can be performed and reliability can be improved.

The present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[0024]

According to the above-described apparatus for measuring the orientation direction of paper, non-woven fabric, etc. of the present invention, the orientation direction of the fibers in the strip-shaped fiber material is simultaneously measured for both the front and back surfaces of the strip-shaped fiber material and obtained by synthesis. Therefore, it is possible to obtain an excellent effect that the measurement can be performed with high accuracy, non-destructively, and online in a short time.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a schematic diagram showing a principle of obtaining a synthetic orientation direction in the present invention.

FIG. 3 is a schematic view showing another example of FIG.

FIG. 4 is a plan view of a belt-shaped fiber material showing an example of a conventional method.

FIG. 5 is a graph showing an example of orientation directions.

FIG. 6 is a graph showing another example of the alignment direction.

[Explanation of symbols]

 6 Belt-shaped fiber 8 Light 9 First light source 11 First camera 12 Second light source 13 Second camera 14 Image signal 15 Image processing signal 16 First image processing device 17 Image signal 18 Image processing signal 19 Second Image processing device 20 Fiber 21 Image synthesizing device S1 Orientation direction S2 Orientation direction S1 'Orientation direction S2' Orientation direction S Synthetic orientation direction

Claims (1)

Claim: What is claimed is: 1. A first light source for irradiating light on one side of a strip-shaped fiber material, and a position at which the light is irradiated on one side of the strip-shaped fiber material so that the fiber can be recognized. The first camera that is enlarged and captured, the second light source that irradiates light toward the other side surface of the belt-shaped fiber material at a position facing the first camera, and the first camera on the other side surface of the belt-shaped fiber material. By separately processing the image signals captured by the second and second cameras, which capture the same position as the one captured by one camera by enlarging it to a size that allows fiber recognition. It is provided with first and second image processing devices for obtaining an image processing signal representing an orientation direction, and an image synthesizing device for synthesizing the image processing signals from the first and second image processing devices to obtain a synthetic orientation direction. Orientation measuring instrument for paper, non-woven fabric, etc. Apparatus.