JPH051993A - Orientation measurement device for striplike fabric material - Google Patents

Abstract

PURPOSE:To provide an orientation measurement device for a striplike fabric material, offering more reliable results of measurement than with a conventional supersonic orientation measurement device. CONSTITUTION:A light source 5 is laid at one side of a striplike fabric material 1 for irradiating a parallel ray 5a toward the material 1, and a light receiving device 8 to receive transmitted light 5b through the material 1 is provided at the other side thereof. In addition, a deflecting plate 10 having a slit of extremely small breadth is rotatably provided between the light receiving device 8 and the material 1. An image processing device 18 is connected to the device 8 for applying an image process to a video signal 17 received therewith through the slit of the plate 10. In addition, an arithmetic device 21 is connected to the image processing device 18 for obtaining the orientation of the material 1 on the basis of an image signal 19 processed through the device 18.

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 of a strip-shaped fiber material.

[0002]

2. Description of the Related Art An ultrasonic orientation measuring apparatus is conventionally known as an apparatus for measuring the orientation (orientation direction) of fibers in a belt-shaped fibrous material such as paper or nonwoven fabric.

FIG. 5 shows an example of the ultrasonic type orientation measuring apparatus. In the figure, 1 is a belt-shaped fiber material, 2 is an ultrasonic wave generator, and 3 is an ultrasonic pulse generated by the ultrasonic wave generator 2. 4 shows a sensor which receives the ultrasonic wave 4, and transmits the ultrasonic pulse 4 through the band-shaped fiber material 1 and measures the propagation velocity thereof to measure the orientation of the band-shaped fiber material 1.

That is, the propagation velocity for each predetermined angle in the circumferential direction centering on a certain point on the strip-shaped fiber material 1 is obtained, and the following relational expression (1) E∝ρC ² (1) E: Young's modulus ρ: Material density C: Based on the propagation velocity, assuming that the material density ρ is constant, the correlation between the propagation velocity C and the Young's modulus E is established, and the strip-shaped fibrous substance 1 with respect to the orientation direction of the fibers. Therefore, the orientation is judged based on the distribution state of the propagation velocity for each of the predetermined angles because the Young's modulus E is the largest.

[0005]

However, such a conventional orientation measuring apparatus is indirectly based on the correlation between the propagation velocity C and the Young's modulus E, which is established on the assumption that the material density ρ is constant. Although the orientation of the strip-shaped fibrous material 1 is determined, in reality, the material density ρ is not always constant, so it is considered that the variation of the material density ρ probably affects the measurement results. Therefore, it is considered to be unreliable to judge the fiber orientation of the strip-shaped fibrous material 1 based on such a measurement result.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a device for measuring the orientation of a strip-shaped fiber having a higher reliability than the conventional measurement results.

[0007]

According to the present invention, a light source for irradiating light toward a strip-shaped fiber material is provided on one side of the strip-shaped fiber material, and a strip-shaped fiber material is provided on the other surface side of the strip-shaped fiber material. A light receiving device for receiving the transmitted light that has been transmitted is disposed, and a polarizing plate having a slit having a minute width is rotatably disposed between the light receiving device and the strip-shaped fiber material, and the polarizing plate having the slit is provided through the slit of the polarizing plate. An image processing device for image-processing an image signal received by a light-receiving device is connected to the light-receiving device, and the arithmetic device for obtaining the orientation of the strip-shaped fiber material based on the image-processed signal image-processed by the image processing device is used as the image. A belt-like fiber orientation measuring device characterized by being connected to a processing device, and a light source for irradiating light toward the strip-shaped fiber object on one side of the strip-shaped fiber object, and other than the band-shaped fiber article On the surface side, a transparent material A light receiving device for receiving light is provided, and a polarizing plate for transmitting the transmitted light as parallel plane polarized light is rotatably provided between the light receiving device and the strip-shaped fiber material, and the light receiving device is provided through the polarizing plate. An image processing device for image-processing the video signal received by the device is connected to the light receiving device,
A device for measuring the orientation of strip-shaped fibrous materials, characterized in that an arithmetic device for determining the orientation of the strip-shaped fibrous material based on an image processing signal image-processed by the image processing device is connected to the image processing device. is there.

[0008]

Therefore, in the present invention, the light source irradiates light from one side of the strip-shaped fiber material to the strip-shaped fiber material, and only the transmitted light that has passed through the strip-shaped fiber material and transmitted through the polarizing plate is received by the light receiving device. , The polarizing plate is shifted by a predetermined angle and the amount of transmitted light in each direction of the polarizing plate is sequentially measured, and the angle with the smallest amount of transmitted light is calculated as the orientation direction of the fibers in the strip-shaped fiber material by the arithmetic unit based on the measured value. It is determined.

[0009]

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

1 to 4 show an embodiment of an apparatus for measuring the orientation of a band-shaped fiber material according to claim 1 of the present invention, and the parts designated by the same reference numerals as those in FIG. 5 represent the same parts. ing.

A light source 5 such as a strobe for irradiating a parallel light beam 5a toward the strip-shaped fiber 1 is arranged on the back side of the strip-shaped fiber 1, and the strip-shaped fiber 1 is sandwiched between the light source 5 and the light source 5. At the position, a box body 7 having an opening 6 adjacent to the strip-shaped fiber material 1 is arranged at the lower portion, and the transmitted light 5b transmitted through the strip-shaped fiber material 1 is provided above the box body 7 in the box body 7. A light receiving device 8 such as a CCD camera for receiving light through the opening 6 is provided.

Furthermore, the width dimensions are parallel to each other and have a width of 10
A polarizing plate 10 having a plurality of slits 9 of about 1000 microns, preferably about 10 to 20 microns is installed on the bottom surface of the box body 7 so as to close the opening 6. Of the pinion 12, 13, 14, 15 to rotatably hold the polarizing plate 10 by engaging the gear 11 formed in the above with the pinion 12, 13, 14, 15 arranged around the opening 6. Any pinion (pinion 12 in the illustrated example) is connected to a rotary drive device 16 such as a motor so that the rotary drive device 16 can rotationally drive the polarizing plate 10 via the pinion 12 and the gear 11. To do.

Further, the video signal 1 received by the light receiving device 8
An image processing device 18 for image-processing 7 is provided at a required place,
Further, the display device 20 for displaying the image processing signal 19 which has been subjected to the image processing by the image processing device 18 as it is, and the arithmetic device 21 for obtaining the orientation direction of the fiber of the strip-shaped fiber material 1 based on the image processing signal 19 are used for the image processing. Connect with the device 18.

The operation will be described below.

A parallel light beam 5a is emitted from the back side of the strip-shaped fiber material 1 toward the strip-shaped fiber material 1 by the light source 5, and only the transmitted light 5b which is transmitted through the strip-shaped fiber material 1 and through the slit 9 of the polarizing plate 10. Is received by the light receiving device 8 and the video signal 17 of the light receiving device 8 is sent to the image processing device 18 to perform image processing according to the amount of transmitted light.

Further, the polarizing plate 10 is shifted by a predetermined angle by the rotation driving device 16 to sequentially measure the amount of transmitted light in each direction of the slit 9, and the image processing signal 19 sent from the image processing device 18 is sent to the arithmetic device 21. As shown in FIG. 3, the transmitted light amount curve X representing the transmitted light amount in each direction of the slit 9 is obtained by statistically processing the angle .theta. It is determined as the orientation direction of the fibers in the fibrous material 1.

That is, when the fibers in the strip-shaped fiber material 1 are arranged in the same direction as the slits 9, the planar fiber density in the field of view of the slits 9 increases and the amount of transmitted light decreases.

Further, if the correlation between the intensity of the strip-shaped fiber material 1 and the transmitted light amount curve is obtained by a preliminary experiment, the transmitted light amount curve X can be associated with the intensity by the arithmetic unit 21, as shown in FIG. It is also possible to obtain the intensity curve Y as shown in.

Since the image processing signal 19 sent from the image processing device 18 is also sent to the display device 20 and displayed as it is, the display device 20 can be used as a monitor during measurement.

Therefore, according to the above-mentioned embodiment, the strip-shaped fiber material 1
The orientation of the fibers in the strip-shaped fibrous material 1 is measured based on the amount of transmitted light for each direction of the slit 9 that directly changes depending on the orientation of the fibers in the conventional ultrasonic type orientation. The reliability of the measurement result can be significantly improved as compared with the measuring device.

Further, in the apparatus for measuring the orientation of a strip-shaped fiber according to the second aspect of the present invention, the strip-shaped fibrous material is transmitted instead of the polarizing plate having slits having a minute width in the above-mentioned embodiments of FIGS. This is a polarizing plate that transmits the transmitted light as plane-polarized light that is optically parallel.

That is, it is considered that light generally oscillates in a direction perpendicular to the traveling direction, and that the oscillation direction is a collection of waves that are oriented in various directions. Among various components of the vibration direction, only the components of light vibrating in one direction such that the vibration direction is limited to one plane including the traveling direction and the vibration directions are parallel to each other are transmitted. .

Also in this case, the amount of transmitted light becomes the smallest when it coincides with the vibration direction defined by the polarizing plate, and a transmitted light amount curve X as shown in FIG. 3 is obtained as in the case of the polarizing plate having slits. The orientation direction can be determined.

Incidentally, the device for measuring the orientation of the strip-shaped fiber material of the present invention is not limited to the above-mentioned embodiment, and it is needless to say that various modifications can be made without departing from the scope of the present invention. is there.

[0025]

According to the above-described device for measuring the orientation of a strip-shaped fiber according to the present invention, the strip-shaped fiber is determined based on the amount of transmitted light for each direction of the slit, which directly changes depending on the orientation of the fiber in the strip-shaped fiber. Since the orientation of the fibers in the object is measured, it is possible to achieve an excellent effect that the reliability of the measurement result can be significantly improved as compared with the conventional ultrasonic orientation measuring apparatus.

[Brief description of drawings]

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

FIG. 2 is a view taken along the line II-II in FIG.

FIG. 3 is a graph showing a transmitted light amount curve representing the amount of transmitted light in each direction of a slit.

FIG. 4 is a graph showing an intensity curve obtained by associating the transmitted light amount curve of FIG. 3 with the intensity.

FIG. 5 is a schematic view showing a conventional example.

[Explanation of symbols]

1 band-shaped fiber 5 light sources 5a Parallel rays (light) 5b transmitted light 8 Light receiving device 9 slits 10 Polarizer 17 video signals 18 Image processing device 19 Image processing signal 21 arithmetic unit

Claims (2)

[Claims] 1. A light source for irradiating light toward a strip-shaped fiber material is provided on one side of the strip-shaped fiber material, and a light receiving device for receiving transmitted light transmitted through the strip-shaped fiber material on the other side of the strip-shaped fiber material. A polarizing plate having a slit with a minute width is rotatably arranged between the light receiving device and the band-shaped fiber material, and a video signal received by the light receiving device is passed through the slit of the polarizing plate. An image processing device for performing image processing is connected to the light receiving device, and an arithmetic device for determining the orientation of the strip-shaped fiber material based on the image processing signal image-processed by the image processing device is connected to the image processing device. A device for measuring the orientation of strip-shaped fibers. 2. A light source for irradiating light toward the band-shaped fiber material is provided on one side of the band-shaped fiber material, and a light receiving device for receiving transmitted light transmitted through the band-shaped fiber material on the other side of the band-shaped fiber material. An image received by the light-receiving device through the polarizing plate, in which a device is provided and a polarizing plate that transmits the transmitted light as parallel plane-polarized light is rotatably provided between the light-receiving device and the strip-shaped fiber material. An image processing device for image-processing a signal is connected to the light-receiving device, and an arithmetic device for determining the orientation of the strip-shaped fiber material based on the image-processed image-processed signal by the image processing device is connected to the image processing device. An apparatus for measuring the orientation of strip-shaped fibers.