KR20060075864A - Floor composed of wood with two dimensional bar code - Google Patents

Abstract

The present invention relates to a floorboard printed with a two-dimensional bar code that provides the necessary data to enable the autonomous mobile robot to operate unattended, the characteristic configuration of the base layer in contact with the floor surface and the adhesive layer is bonded through In the flooring material comprising a veneer layer and a surface protective layer to protect the surface of the veneer layer, On the veneer layer is formed a bar code layer printed with a two-dimensional bar code at a predetermined interval, according to the flooring material printed two-dimensional bar code, Since the two-dimensional bar code is printed directly on the surface layer constituting the flooring has the effect that it is not easily separated from the flooring.

Flooring, flooring, barcode, inversion, barcode reader, autonomous mobile robot

Description

Floor composed of wood with two dimensional bar code

1 is a cross-sectional view showing a typical parquet flooring.

Figure 2 is a cross-sectional view showing a flooring with a conventional RFID card embedded.

Figure 3 is a perspective view showing a sheet printed with a conventional two-dimensional bar code.

Figure 4 is a perspective view of the floor covering according to the invention.

5 is a plan view showing a two-dimensional bar code according to the present invention.

Figure 6 is a cross-sectional view showing a floor flooring according to the present invention.

Figure 7 is a cross-sectional view showing a floor flooring of another embodiment according to the present invention.

※ Explanation of symbols about main part of drawing ※

200: base layer 210: pattern wood layer

220: barcode layer 230: surface protective layer

230a: Top layer 230b: Middle layer

230c: undercoat

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to floor coverings printed with two-dimensional barcodes, and more particularly, to floor coverings printed with two-dimensional barcodes that provide data necessary for autonomous mobile robots to operate unattended.

In general, in homes, officetels, and public offices, vinyl flooring, marble, tiles, flooring, etc. are installed on the floor in order to make a person's feet comfortable or beautiful.

In particular, in recent years, as the time for contacting nature is shortened, the use of floor coverings in which the pattern of trees is expressed on the surface of the floor covering is increasing.

The flooring material is in contact with the floor surface as shown in Figure 1 is provided with a base layer 100 made of plywood laminated a plurality of wood, on the surface layer of the base layer 100, the veneer layer 101 and the base An adhesive layer 102 for adhesion to the layer 100 is formed, and the veneer layer 101 is formed on the adhesive layer 102.

The veneer layer 101 may use a thickness of 0.1mm ~ 9mm according to the configuration of the flooring product.

On the surface of the veneer layer 101, a surface protective layer 103 for protecting the veneer layer 101 is formed by laminating a lower layer 103c, a middle layer 103b, a top coat layer 103a, The surface protective layer 103 is formed to be transparent so that the pattern of the pattern expressed on the veneer layer 101 can be visually identified, while preventing the veneer layer 101 from being damaged by an impact applied from the outside. The predetermined strength is maintained.

This conventional flooring flooring is to visually identify the pattern of the natural wood expressed in the veneer layer 101 through the surface protective layer 103, so that the natural texture is expressed to improve the appearance beauty, the surface protection The layer 103 is excellent in scratch resistance and stain resistance and can exhibit an electrostatic generation suppression effect and a gloss effect, thereby improving the durability of the floor covering.

Recently, with the emergence of autonomous mobile robots that autonomously move and perform various functions, various techniques for providing information, such as absolute coordinates, for moving the autonomous mobile robot have been proposed.

For example, by embedding an RFID (Radio frequency ID) card in the flooring material 2, the autonomous mobile robot receives information about the absolute coordinates from the RFID card, and the relative coordinates, the moving direction, the distance, etc. from the absolute coordinates. A technique capable of quickly and accurately calculating is known, and this technique has a configuration in which the RFID cards 1a, 1b, 1c are embedded in a selected portion of a flooring having a multi-layered structure, as shown in FIG.

When the RFID cards 1a, 1b and 1c are used in this way, the accuracy of position and orientation recognition of the autonomous mobile robot 3 is determined according to the distribution density of the RFID cards 1a, 1b and 1c. If the distribution density of 1b, 1c is too low, the precise position and direction recognition of the autonomous mobile robot 3 cannot be expected. If the distribution density of the RFID cards 1a, 1b, 1c is too high, each RFID card 1a, 1b is expected. , 1c) may cause an error in reading the unique number due to mutual interference between the RF signals output from 1c).

Therefore, in order to prevent an error from occurring, it is better to limit the embedding density of the RFID cards 1a, 1b, and 1c to an appropriate range. This can cause a drop in the precision. In addition, in the method using the RFID card (1a, 1b, 1c), the autonomous mobile robot (3) with the RFID card reader 4 must recognize at least two RFID cards at the same time in order to recognize the direction If the distribution density of the RFID cards 1a, 1b, 1c is not high enough, it becomes difficult to recognize the direction.

In addition, an error may occur even when there is an object absorbing a magnetic field in a place where the RFID cards 1a, 1b, and 1c are embedded.

In particular, the method using the RFID card (1a, 1b, 1c) has a problem that the manufacturing process is inconvenient because the RFID card (1a, 1b, 1c) must be embedded in the flooring.

In addition, when using the RFID card (1a, 1b, 1c) in a large area, a plurality of RFID cards (1a, 1b, 1c) should be used, expensive installation in operating the autonomous mobile robot (3) In addition to the expense, it is necessary to pay attention to damage during maintenance, and expensive maintenance costs are caused.

In addition, the RFID card reader (1a, 1b, 1c) and the RFID card reader for recognizing the RFID card (1a, 1b, 1c) is an expensive component, to increase the cost of the flooring flooring and autonomous mobile robot (3) Has the problem.

In order to make up for this drawback, a technology has been developed to form a two-dimensional barcode layer having data on a separate sheet and allow an autonomous mobile robot equipped with a barcode reader to operate unattended using the information of the two-dimensional barcode.

3, the two-dimensional bar code 11 is arranged in the sheet 10 at regular intervals in the longitudinal direction and each two-dimensional bar code 11 functions as a coordinate system by having different data, for example, coordinate values. . That is, the barcode reader obtains the absolute coordinates from the two-dimensional bar code, calculates the relative coordinates from these absolute coordinates, and further calculates the movement direction and distance.

However, when the two-dimensional bar code 11 is formed on the sheet 10, the adhesive layer should be provided on the back surface of the sheet 10 to be used for the flooring material. If the elongation of the sheet and the flooring material is different from each other, the sheet is separated or moved from the flooring material. There is a problem in that the position of the two-dimensional bar code is changed.

In addition, as shown in FIG. 3, a two-dimensional bar code, a QR code (Ouick Response Code) developed in the Nippondenso ID System, is mainly used. The rectangular QR code has three finders in the corners for easy identification, and the areas marked in black are the data holding parts.

The fluorescent ink for two-dimensional barcodes currently being developed includes a urethane, vinyl, acrylic, modified acrylic resin and other additives in organic dyes or pigments. It is used colorlessly so as not to be identified. However, the colorless transparent fluorescent ink is mainly used so as not to harm the aesthetics of the pattern layer printed on the surface due to the nature of PVC flooring material.

However, when printing a two-dimensional bar code using such organic dyes or pigments, there is a problem that the light resistance and heat resistance is lowered and discolored depending on the type of the resin contained in the organic dyes or pigments to damage the aesthetics of the flooring material. Here, light resistance refers to the ability of printed two-dimensional barcodes to be emitted by natural light or a barcode reader and not gradually weaken. In terms of flooring, the service life of the two-dimensional barcodes using organic dyes is weak because of their low light resistance. There was a problem as short as this year.

The present invention has been proposed to solve such a problem, and an object thereof is to provide a floor flooring material which can accurately provide information required for the movement of an autonomous mobile robot by a simple structure in which a two-dimensional barcode is printed directly on the flooring material.

In another aspect, the present invention provides a floor covering having a two-dimensional bar code that is not easily damaged by surface abrasion or heat, and improved recognition rate by the light resistance and barcode reader.

Referring to the characteristic configuration of the present invention for achieving the above object is as follows.

The flooring material printed with the two-dimensional bar code of the present invention is a flooring material comprising a base layer in contact with the floor surface, a veneer layer bonded through an adhesive layer, and a surface protective layer to protect the surface of the veneer layer, wherein the veneer On the layer is formed a bar code layer printed a two-dimensional bar code at a predetermined interval.

Referring to the present invention having such characteristics in detail as follows.

Figure 4 is a perspective view showing a flooring floor according to the present invention, Figure 5 is a plan view showing a two-dimensional barcode according to the present invention, Figure 6 is a cross-sectional view showing a flooring floor according to the present invention, Figures 7 and 8 the present invention Sectional drawing showing the flooring of another embodiment according to.

As referred to herein, the flooring material is in contact with the floor surface is provided with a base layer 200 made of plywood laminated a plurality of wood, the veneer layer 210 on the surface layer of the base layer 200 An adhesive layer 260 is formed to adhere to the base layer 200, and the veneer layer 210 is formed on the adhesive layer 260.

The veneer layer 210 may use a thickness of 0.1mm ~ 9mm according to the configuration of the flooring product.

On the surface of the veneer layer 210, a surface protective layer 230 for protecting the veneer layer 210 is formed by laminating a lower layer 230c, a middle layer 230b, a top coat layer 230a, The surface protective layer 230 is formed to be transparent so that the pattern of the pattern expressed on the veneer layer 210 can be visually identified, while preventing the veneer layer 210 from being damaged by an impact applied from the outside. The predetermined strength is maintained.

In addition, a two-dimensional barcode printed barcode layer 220 is stacked on the upper layer of the veneer layer 210, and the barcode layer 220 may be formed on the upper layer 230c or the upper layer 230b. Do.

A moisture proof laminate layer 240 may be formed on the bottom of the base layer 200 to prevent the base layer 200 from being damaged by moisture generated from the bottom surface.

On the other hand, the upper surface of the barcode layer 220 is laminated with a surface protective layer 230 formed of a transparent material to improve the transparency and durability of the surface of the veneer layer 210 and to impart durability.

The barcode layer 220 is printed on the veneer layer 210 or the undercoat 230c or the intermediate layer 230b, as described in the prior art, in the coordinate system for the autonomous mobile robot moving on the flooring. To be able to function, two-dimensional barcodes are arranged at regular intervals in the longitudinal direction and have different data, for example, coordinate values. The upper and lower middle and upper middle layers stacked on the barcode layer 220 are transparent layers, and the surface scratches on which the two-dimensional barcode is applied to the flooring are not impeded by the barcode reader mounted on the autonomous mobile robot. It protects the product from being easily damaged by heat.

In addition, since the barcode layer 220 is printed on the upper inner side (the upper or lower layer of the patterned wood layer, the upper portion of the middle layer) constituting the flooring floor, the problem caused by adhering the adhesive sheet to the flooring as in the prior art is eliminated. do.

The printing method of the barcode layer 220 is used, such as gravure printing, transfer printing, marking machine (industrial inkjet printer) printing, etc. The ink used may be an organic dye-based fluorescent ink, but preferably inorganic fluorescent or phosphorescent An ink obtained by mixing a pigment with a solvent is used.

The composition of the ink including an inorganic fluorescent or photoluminescent pigment may be an inorganic fluorescent or photoluminescent pigment, urethane, vinyl, acrylic, or modified acrylic resin, and additives are included to prevent precipitation, improve dispersibility, and ease bubble removal. It includes solvents or monomers, and includes ultraviolet absorbers, blockers, antioxidants and the like to improve the light and heat resistance of resins and other additives.

These inorganic fluorescent inks are colorless and are not identified by the naked eye in the printed state, and use materials emitting in the ultraviolet wavelength range. This is for the economics of the barcode reader 300 to recognize the two-dimensional bar code without harming the aesthetics of the printed pattern. As the LED used in the barcode reader 300, an ultraviolet LED is cheaper than an infrared LED.

The two-dimensional bar code may be printed in a conventional manner as shown in part (a) of FIG. 5, but may be printed as an inverted image as shown in part (b) of FIG. 5. Although the two-dimensional barcode illustrated in FIG. 5 is expressed in black as printed with colored ink, in the present invention, the two-dimensional barcode is printed using a colorless inorganic fluorescent ink and is not actually identified by the naked eye, and the black of the two-dimensional barcode is fluorescent. Assume that the ink is the printed part. When the two-dimensional barcode is printed as an inverted image as described above, the recognition rate by the barcode reader is improved. This is because the image 31a and the background are inverted from each other and the clear boundary is generated in the two-dimensional barcode. The two-dimensional bar code illustrated in FIG. 4 is a QR code.

Then, the veneer layer 210 is formed of a single wood having a predetermined thickness as in the first embodiment shown in FIG. 6, or the MDF layer 211 is formed at the bottom as in the second embodiment shown in FIG. And laminated a melanin-impregnated pattern sheet 212 on top of the MDF layer 211, or forming a plywood layer 211a at the bottom as shown in the third embodiment shown in FIG. It may be formed of the veneer layer (212a) is expressed in the pattern of the natural wood, the configuration of the veneer layer 210 can be variously changed according to the use of the flooring flooring.

As described above, according to the flooring material on which the two-dimensional bar code is printed, the two-dimensional bar code is directly printed on the surface layer constituting the flooring, so that the two-dimensional bar code is not easily separated from the flooring material.

In addition, the two-dimensional bar code is placed in the flooring of the floor, so it is not easily damaged by surface wear or heat.

In addition, since the inorganic fluorescent and photoluminescent pigments are used as inks for printing two-dimensional barcodes, they are resistant to heat and have excellent light resistance.

In addition, since the two-dimensional barcode is printed as an inverted image, the recognition rate by the barcode reader is improved.

Claims (7)

In the flooring material comprising a base layer in contact with the bottom surface, a veneer layer bonded through an adhesive layer, and a surface protective layer to protect the surface of the veneer layer, Two-dimensional barcode printed flooring material, characterized in that the bar code layer on which the two-dimensional barcode is printed at a predetermined interval formed on the veneer layer. The floor covering material of claim 1, wherein the surface protection layer formed of a transparent material on the top of the two-dimensional barcode layer is sequentially stacked with a lower layer, a middle layer, and a top layer. The floor covering of claim 1 or 2, wherein the barcode layer is printed with transparent ink. 3. The floor covering of claim 1 or 2, wherein the barcode layer is printed as an inverted image. The flooring material of claim 3, wherein the ink is any one selected from organic fluorescent pigments, inorganic fluorescent pigments, and inorganic photoluminescent pigments. The flooring material of claim 3, wherein the barcode layer is printed by any one selected from flexographic printing, gravure printing, silkscreen printing, pad printing, and live-print printing. 4. The floor covering of claim 3, wherein a moisture proof laminate layer is formed on the bottom of the base layer.

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