JPS6098373A - Material and instrument for recognizing magnetized pattern - Google Patents

Abstract

PURPOSE:To recognize easily the arrangement of polarities of magnetized patterns on a magnetic recording medium visually by using fine magnet particles where the front face side and the rear face side are magnetized with N and S poles respectively and N and S poles are different in color from each other. CONSTITUTION:Each of fine magnet particles 1 has a minute plane plate shape, and its front side 1A and rear side 1B are different in color, and the font side and the rear side are magnetized with N and S poles respectively. When these fine magnet particles 1 are scattered onto the magnetic recording medium, fine magnet particles 1 are stuck to a part 11 where the surface of the magnetic recording medium 10 is magnetized with the S pole so that the white side of them faces up. Meanwhile, fine magnet particles 1 are stuck to a part 12 where the surface of the magnetic recording medium 10 is magnetized with the N pole so that the black side of them faces up. Thus, shapes, intervals, and the number of magnetized patterns on the magnetic recording medium are recognized visually, and polarities of magnetized patterns are recognized also visually clearly by the color arrangement of black and white.

Description

DETAILED DESCRIPTION OF THE INVENTION This field of industrial application is based on magnetic chives 0. magnetic card, magnetic scale,
The present invention relates to magnetization pattern recognition materials and devices for recognizing nine turns of magnetization in magnetic recording media such as magnetic drums.

Prior Art Conventionally, in order to visually recognize the magnetization pattern, which is the recorded signal of a glazed magnetic recording medium, a device completely filled with fine iron or iron oxide powder dispersed in a liquid was used to detect the magnetic recording medium. For observation, the dispersion liquid was directly sprinkled onto the magnetic recording medium. However, in these conventional methods, although the shape, spacing, number, etc. of the magnetization patterns can be visually observed, it is not possible to visually observe the polarity arrangement of the magnetization patterns. When using crushed, fine iron powder and INJ-based Basin's magnetic recording media, there is not much difference in color tone between the fine #l iron powder and the ground of the magnetic recording medium, so the magnetization pattern should be changed. It was difficult to recognize visually.

OBJECTS OF THE INVENTION One aspect of the present invention is to solve the problems described above.
Eliminate the illumination point and easily visually determine the polar arrangement of the magnetization pattern. It is an object of the present invention to provide magnetized and Kuhn recognition materials and devices that enable the use of magnetized and Kuhn-recognized materials.

Invention configuration i: Valued pattern comparison material #% /! ! ! This device is capable of arranging the polarity of the sulfide pattern on a magnetic recording medium in different colors by using micromagnetic powder that is magnetized with N-5 poles in the front and back directions, and in which the N-pole and the 8th position are colored #-. Let them identify.

Practical Examples Next, the present invention will be described in more detail a1 with reference to embodiments of the present invention based on the accompanying drawings.

FIG. 1 shows an enlarged example of small magnetic powder, which is the main component of the magnetization pattern recognition material and device of the present invention. As shown in FIG. 7, the micro magnetic powder 1 of this example has a pine V small flat root shape ff:, and the color of the front side IA and the die side 1B are different, and the color is different in the mounting direction. N
- Three disasters are mentioned.

An example of a method for forming these minute magnet powders will be described below.

Example 1 A white paint made by dispersing a white pigment in a methyl ethyl ketone solution of epoxy resin and a black magnetic paint made by dispersing barium ferrite powder in the same solution were prepared. A two-layer sheet was made with these paints, and the black side was N88. , white Oi+
The powder was magnetically ground to form fine magnetic powder.

Example λ A yellow paint in which a yellow pigment Fast Yellow was added to a methyl ethyl ketone solution of an epoxy resin, and a blue magnetic paint in which barium ferrite was dispersed in the same solution and the phthalocyanine blue was separated were prepared, and two layers were prepared using these paints. A sheet was made, and the blue side was made into a north pole and the yellow side was made into a south pole and crushed to form fine magnetic powder.

The fine magnetic powder thus formed is sprinkled onto the magnetic recording medium, and as shown in FIG. In the case of powdered small sand/stone powder, use the powder to attach the microscopic magnet powder to the powder, and in the case of the micromagnetic powder in Example Since the powder is added thereto, -force is applied thereto, and in the portion 12 where the surface of the magnetic recording medium 10 is magnetized to the north pole, i
In the case of the puffer fish micromagnetic powder in the example described in II, the micromagnetic powder is attached to it with the μ color axis facing up, and in the case of the Neko grinding stone powder in the above example, the micromagnet is coated with blue 0Iii. Powder will stick there. Therefore, with such minute magnet powder, not only can the shape, spacing, number, etc. of the magnetization pattern of a magnetic recording medium be visually recognized, but also the i+ll/S stone powder can be used to visually recognize the colors of white and black. By array,
1. In the case of the magnetic powder described in Example U of i11, the polarity arrangement of the magnetization pattern can be clearly recognized visually by the color arrangement of yellow and 'n゛, and the magnetization and magnetization pattern can be clearly recognized. −
: A light effect as a phase material is exhibited.

When I tried to form small pieces of Nanaishi powder, I found that if the particle size of the Nanaishi powder was smaller than 70 μm, it would be difficult to reverse the pattern depending on the polarity of the magnetization pattern, making it difficult to distinguish colors.
It was also found that when the particle size is larger than /a, it becomes difficult to invert. Therefore, as the magnetization pattern recognition material, fine magnetic powder having a particle size within the range of IQμ to l is preferable.

As for the magnetic material that forms the micro magnetic powder,
In the above embodiment, barium ferrite was used, but other materials such as strontium ferrite, cobalt ferrite, and lead ferrite may also be used. In addition, as the magnetic material, magnetite, gamma iron oxide, chromium dioxide, etc. may be used, and further,
In metals, iron, cobalt, cobalt-chromium, etc.
The rare ±Th cobalt may be samarium cobalt, yttrium cobalt, cerium cobalt, or the like.

In the above explanation, the microscopic stone powder L was used as it is as the magnetization four-turn recognition material, but as shown in FIG. 1 may be dispersed in a dispersion liquid 2 such as water or Freon, and this may be used as a magnetization pattern recognition liquid.

Furthermore, as shown in the cross-sectional view in FIG.
It is also possible to prepare an enclosure 8 covered with , fill it with a magnetization pattern recognition liquid as explained in connection with FIG. 3, and use this as a magnetization pattern recognition instrument. good.

Instead of enclosing the magnetization pattern identification liquid in such an enclosure 8, only the microscopic magnet powder 1 may be enclosed, and this may be used as a magnetization pattern recognition instrument. Such a magnetized pattern recognition device is convenient for use in reverse.

Furthermore, as shown in the fat plane diagram in FIG.
By forming microcapsules 4 using the dispersion as a response and covering them on a film substrate 5 using a hot binder side fat 6, this may be used as a magnetization pattern sensing device. In such a magnetization nozzle turn recognition device, the minute magnetic powder encapsulated in each microcapsule 4 is extremely easily reversed according to the magnetization/data turn characteristics of the magnetic recording medium. You can recognize the whole clam pattern with very clear colors. Methods for forming the microcapsules 4 include the known simple coacervation method, complex coacervation method, interfacial polymerization method, and in situ polymerization method.
-5ltu) - There are polymerization methods, liquid hardening coating methods, interfacial precipitation methods, interfacial precipitation methods, spray drying methods, inorganic quasi-methods, phase separation methods, etc., and cassellized gold coating is performed using materials suitable for each method. Bye.

Effects of the Invention As mentioned above, according to the magnetization/turn recognition material and device of the present invention, the magnetization/turn recognition material and device of the present invention can detect the magnetization/turn recognition of a magnetic recording medium, etc. In addition to the shape, spacing, and number of turns, the polar arrangement can also be clearly recognized by color, and the color tone of the front and back sides of the micro magnetic powder can be contrasted with the color tone of the magnetic recording medium to which it is applied. The magnetization pattern and polarity (IL) can be clearly observed regardless of the color tone of the magnetic recording medium.

[Brief explanation of the drawing]

Figure 1 on page 1 of the Himetsuki diagram is an enlarged view of an example of the magnetization pattern recognition material of the present invention and micro magnetic powder used in the device, and Figure 2 is a diagram showing a magnetic recording medium using the magnetization pattern recognition material of the present invention. Figure 3 shows the visualization of the magnetization and turns of
The figure is a water valve, a diagram showing example 1 of Ming's magnetization pattern recognition liquid,
Fig. 11 shows -? of the emulsification) 4-turn recognition device of the present invention. 1
FIG. 1 is a sectional view showing another example of the magnetization pattern recognition instrument of the present invention. FIG. l...Small magnet powder, lA...front side, lB...ri 2
Side, 2...Dispersion liquid, 8...Inclusion body, Small...Microcapsule, 5...Film substrate.

Claims (1)

[Scope of Claims] (11) A magnetization pattern recognition material characterized by being made of fine magnetic powder having N-3 poles magnetized in the front and back directions, and with N& and S poles having different colors. (22) The fine matrix powder described above The magnetization pattern recognition material according to claim (1), wherein the particle size is /θμ to /2.(3) A dispersion liquid and N-
A sulfurized glossy turn recognition material characterized by being made of microscopic magnetic powder that has five poles magnetized and whose N and S poles have different colors. (4) The magnetization pattern recognition material according to claim (3), wherein the particle size of the fine abrasive powder is 1Oμ~/μ. (5) An enclosure whose front surface is transparent at least, and an N-3 pole magnetized in the outward direction of the enclosed body, and an N-pole and an S
A magnetization pattern recognition device whose characteristic is that it consists of minute magnetic powder that differs in color from pole to pole. (6) The magnetization pattern recognition instrument according to claim (5), wherein the fine magnet powder has a particle size of 10 μ to 1 Wnl. (7) An inclusion body whose front surface is transparent at least, a dispersion liquid encapsulated in the inclusion body, and an N-3 pole shaped in the front and back direction dispersed in the dispersion liquid, and the N-pole and the S pole are colored. A magnetization pattern recognition device characterized in that it consists of microscopic magnetic powder with different magnetic properties. (8) The magnetization/turn recognition device according to claim (7), wherein the particle size of the fine magnet powder is lOμ~/M.